{"transactions":[{"id":3456743,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":4,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":5,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":6,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":7,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":8,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":9,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (limited partner interests)","published_at":"2019-07-24T16:52:52.000Z","date":"2019-07-23","kind":"disposition_to_issuer","acquired":false,"shares":42514126,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents common units representing limited partnership interests (the \"Common Units\") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the \"Issuer\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Pursuant to that certain Master Contribution Agreement, dated July 22, 2019, by and among Anchor Midstream Acquisition, LLC, a Delaware limited liability company (\"Anchor Acquisition\"), 3CM Holdings, LLC (f/k/a High Point Infrastructure Partners, LLC), a Delaware limited liability company (\"3CM\"), Third Coast Midstream Holdings, LLC (f/k/a/ American Midstream GP, LLC), a Delaware limited liability company (the \"General Partner\"), Magnolia Infrastructure Holdings, LLC, a Delaware limited liability company (\"Magnolia Holdings\"), Magnolia Infrastructure Partners, LLC, a Delaware limited liability company (\"Magnolia\"), AMID GP Holdings, LLC, a Delaware limited liability company (\"AMID GP\"), JP Energy Development, L.P., a Delaware limited partnership (\"JP Energy\"), Busbar II, LLC, a Delaware limited liability company (\"Busbar\"), High Point Energy, LLC, a Texas limited liability company, ArcLight Energy Partners Fund V, L.P.,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(continued from footnote 2) a Delaware limited partnership (\"Fund V\"), Stephen W. Bergstrom, individually (\"Bergstrom\") and Daniel C. Campbell, individually, (i) JP Energy, as holder of 422,805 Common Units, transferred all of its Common Units to Magnolia Holdings, (ii) Magnolia Holdings, as holder of 20,372,720 Common Units, transferred all of its Common Units to the General Partner, (iii) Magnolia, as holder of 5,108,669 Common Units, transferred all of its Common Units to the General Partner, (iv) Busbar, as holder of 2,853,482 Common Units, transferred all of its Common Units to the General Partner and (v) Bergstrom, as holder of 64,221 Common Units, transferred all of his Common Units to the General Partner. Immediately following the preceding transactions, the General Partner, as holder of 41,209,117 Common Units, transferred all of its Common Units to Anchor Acquisition."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On July 23, 2019, pursuant to a Plan of Conversion adopted by the Issuer, the Issuer converted into a Delaware limited liability company named \"Third Coast Midstream, LLC\" (\"Third Coast Midstream\" and, such conversion, the \"AMID Conversion\"). In connection with the AMID Conversion, each Common Unit issued and outstanding immediately prior to the AMID Conversion was converted into one limited liability company unit of Third Coast Midstream. Magnolia Holdings also beneficially owns 1,369,230 Common Units issuable upon exercise of the warrants issued to Magnolia Holdings by the Issuer, dated July 18, 2019. After the AMID Conversion, all of the outstanding warrants converted into the right to receive 1,369,230 limited liability company units of Third Coast Midstream. As a result of the AMID Conversion, all Common Units were cancelled and ceased to be outstanding and none of JP Energy, Magnolia Holdings, Magnolia and Busbar beneficially own any Common Units."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents common units representing limited partnership interests (the \"Common Units\") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the \"Issuer\")."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-19-020240","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000089924319020240/doc4.xml","form_type":"4"}},{"id":3526143,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":4,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":5,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":6,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":7,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":8,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":9,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Units","published_at":"2019-05-15T17:22:32.000Z","date":"2019-05-13","kind":"grant","acquired":true,"shares":280734,"price":13.98,"value":3924661.32,"ownership":{"direct":false,"nature":"(3)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time."}],"balance_after":9808777,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":281127},"source":{"system":"sec-edgar","filing":"0001513965-19-000065","document":"wf-form4_155795533660415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396519000065/wf-form4_155795533660415.xml","form_type":"4"}},{"id":3526142,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":4,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":5,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":6,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":7,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":8,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":9,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2019-05-15T17:22:32.000Z","date":"2019-05-13","kind":"grant","acquired":true,"shares":102729,"price":13.66,"value":1403278.14,"ownership":{"direct":false,"nature":"(2)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date.  The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date.  The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date.  The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time."}],"balance_after":4489748,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":131606},"source":{"system":"sec-edgar","filing":"0001513965-19-000065","document":"wf-form4_155795533660415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396519000065/wf-form4_155795533660415.xml","form_type":"4"}},{"id":3526141,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":4,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":5,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":6,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":7,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":8,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":9,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2019-05-15T17:22:32.000Z","date":"2019-05-13","kind":"grant","acquired":true,"shares":239779,"price":13.66,"value":3275381.14,"ownership":{"direct":false,"nature":"(1)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by American Midstream GP, LLC (the \"General Partner\"), the general partner of American Midstream Partners, LP (the \"Issuer\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date.  The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by American Midstream GP, LLC (the \"General Partner\"), the general partner of American Midstream Partners, LP (the \"Issuer\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date.  The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by American Midstream GP, LLC (the \"General Partner\"), the general partner of American Midstream Partners, LP (the \"Issuer\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date.  The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.2811 at any time."}],"balance_after":10479528,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":239779},"source":{"system":"sec-edgar","filing":"0001513965-19-000065","document":"wf-form4_155795533660415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396519000065/wf-form4_155795533660415.xml","form_type":"4"}},{"id":3650070,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Untis","published_at":"2019-02-19T16:14:49.000Z","date":"2019-02-15","kind":"grant","acquired":true,"shares":272688,"price":13.98,"value":3812178.24,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0014 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0014 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0014 at any time."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0014 at any time."}],"balance_after":9514330,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":273069},"source":{"system":"sec-edgar","filing":"0000899243-19-004047","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924319004047/doc4.xml","form_type":"4"}},{"id":3650069,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"SerieA-2 Convertible Preferred Units","published_at":"2019-02-19T16:14:49.000Z","date":"2019-02-15","kind":"grant","acquired":true,"shares":99717,"price":13.66,"value":1362134.22,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.2811 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.2811 at any time."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.2811 at any time."}],"balance_after":3401875,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":127747},"source":{"system":"sec-edgar","filing":"0000899243-19-004047","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924319004047/doc4.xml","form_type":"4"}},{"id":3650068,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2019-02-19T16:14:49.000Z","date":"2019-02-15","kind":"grant","acquired":true,"shares":232751,"price":13.66,"value":3179378.66,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion rate of 1:1.2811 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion rate of 1:1.2811 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion rate of 1:1.2811 at any time."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion rate of 1:1.2811 at any time."}],"balance_after":7940322,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":281861},"source":{"system":"sec-edgar","filing":"0000899243-19-004047","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924319004047/doc4.xml","form_type":"4"}},{"id":3735719,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":3,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":4,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":5,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (limited partner interests)","published_at":"2018-12-11T18:28:34.000Z","date":"2018-12-10","kind":"grant","acquired":true,"shares":810517,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote 3"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In December 2013, American Midstream Partners, LP (the \"Issuer\") acquired Blackwater Midstream Holdings, LLC (\"Blackwater\") from AL Blackwater, LLC (\"AL Blackwater\"). The Agreement and Plan of Merger by and among AL Blackwater, Blackwater, the Issuer and Blackwater Merger Sub, LLC, dated as of December 10, 2013 (the \"Merger Agreement\"), included a provision whereby AL Blackwater would be entitled to additional merger consideration, payable in either cash or Common Units, or a combination thereof, based on Blackwater meeting certain operating targets. Final resolution of the additional merger consideration was determined in the fourth quarter of 2018, in accordance with the Merger Agreement, and, on December 10, 2018, the Issuer issued 810,517 Common Units to Common Units to Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), an affiliate of AL Blackwater, as part of the additional merger consideration."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Does not include (i) 7,707,571 Series A-1 Convertible Preferred Units held directly by High Point Infrastructure Partners, LLC (\"HPIP\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.2811 at any time, (ii) 3,302,158 Series A-2 Convertible Preferred Units held by Magnolia Infrastructure Partners, LLC (\"Magnolia\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.2811 at any time and (iii) 9,241,642 Series C Convertible Preferred Units held by Magnolia Holdings, which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.0014 at any time."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The common units reflected in Column 5 include (i) 2,853,482 common units directly owned by Busbar II, LLC (\"Busbar\"), (ii) 10,563,942 common units directly owned by Magnolia Holdings, (iii) 618,921 common units directly owned by Magnolia, (iv) 1,349,609 common units directly owned by American Midstream GP, LLC (the \"General Partner\"), the general partner of the Issuer."}],"balance_after":15385954,"source":{"system":"sec-edgar","filing":"0001628280-18-015021","document":"wf-form4_154457089559054.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000162828018015021/wf-form4_154457089559054.xml","form_type":"4"}},{"id":3839923,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":3,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":4,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (limited partner interests)","published_at":"2018-08-17T20:38:11.000Z","date":"2018-08-15","kind":"purchase","acquired":true,"shares":2500,"price":6.25,"value":15625.0,"ownership":{"direct":false,"nature":"(4)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Does not include (i) 7,707,571 Series A-1 Convertible Preferred Units held directly by High Point Infrastructure Partners, LLC (\"HPIP\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.1582 at any time, (ii) 3,302,158 Series A-2 Convertible Preferred Units held by Magnolia Infrastructure Partners, LLC (\"Magnolia\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.1582 at any time and (iii) 9,241,642 Series C Convertible Preferred Units held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.0542 at any time."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The common units reflected in Column 5 include (i) 2,853,482 common units directly owned by Busbar, (ii) 9,753,425 common units directly owned by Magnolia Holdings, (iii) 618,921 common units directly owned by Magnolia and (iv) 1,349,609 common units directly owned by the General Partner."}],"balance_after":14575437,"source":{"system":"sec-edgar","filing":"0001513965-18-000098","document":"wf-form4_153455267337808.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000151396518000098/wf-form4_153455267337808.xml","form_type":"4"}},{"id":3839922,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":3,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":4,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (limited partner interests)","published_at":"2018-08-17T20:38:11.000Z","date":"2018-08-15","kind":"purchase","acquired":true,"shares":595228,"price":6.16,"value":3666604.48,"ownership":{"direct":false,"nature":"(3)"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These common units were purchased in multiple transaction ranging from $5.80 to $6.50, inclusive.  The Reporting Persons undertake to provide to American Midstream Partners, LP (the \"Issuer\"), any security holder of the Issuer or the staff of the United States Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth above."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Does not include (i) 7,707,571 Series A-1 Convertible Preferred Units held directly by High Point Infrastructure Partners, LLC (\"HPIP\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.1582 at any time, (ii) 3,302,158 Series A-2 Convertible Preferred Units held by Magnolia Infrastructure Partners, LLC (\"Magnolia\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.1582 at any time and (iii) 9,241,642 Series C Convertible Preferred Units held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.0542 at any time."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The common units reflected in Column 5 include (i) 2,850,982 common units directly owned by Busbar II, LLC (\"Busbar\"), (ii) 9,753,425 common units directly owned by Magnolia Holdings, (iii) 618,921 common units directly owned by Magnolia and (iv) 1,349,609 common units directly owned by American Midstream GP, LLC (the \"General Partner\"), the general partner of the Issuer."}],"balance_after":14572937,"source":{"system":"sec-edgar","filing":"0001513965-18-000098","document":"wf-form4_153455267337808.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000151396518000098/wf-form4_153455267337808.xml","form_type":"4"}},{"id":4052230,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":5,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":6,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":7,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Units","published_at":"2018-02-16T17:04:33.000Z","date":"2018-02-14","kind":"grant","acquired":true,"shares":276195,"price":13.39,"value":3698251.05,"ownership":{"direct":false,"nature":"(3)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0456 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0456 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date.  The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.0456 at any time."}],"balance_after":9241642,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":288789},"source":{"system":"sec-edgar","filing":"0001513965-18-000016","document":"wf-form4_151881865842671.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396518000016/wf-form4_151881865842671.xml","form_type":"4"}},{"id":4052229,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":5,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":6,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":7,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2018-02-16T17:04:33.000Z","date":"2018-02-14","kind":"grant","acquired":true,"shares":87079,"price":15.23,"value":1326213.17,"ownership":{"direct":false,"nature":"(2)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.1490 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.1490 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units') at a conversion ratio of 1:1.1490 at any time."}],"balance_after":3302158,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":100054},"source":{"system":"sec-edgar","filing":"0001513965-18-000016","document":"wf-form4_151881865842671.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396518000016/wf-form4_151881865842671.xml","form_type":"4"}},{"id":4052228,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":5,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":6,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":7,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2018-02-16T17:04:33.000Z","date":"2018-02-14","kind":"grant","acquired":true,"shares":203252,"price":15.23,"value":3095527.96,"ownership":{"direct":false,"nature":"(1)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units) held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date.  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The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated.  The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated.  The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated.  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As a result, none remain outstanding."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Pursuant to the Agreement of Limited Partnership of the Issuer (as amended, the \"Partnership Agreement\"), the Issuer exercised its call right to repurchase all of the 2,333,333 outstanding Series D Convertible Preferred Units (the \"Series D Units\") from Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings).  On October 2, 2017, the Issuer purchased the Series D Units from Magnolia Holdings in a transaction in accordance with the Partnership Agreement and Rule 16b-3.  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The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."}],"balance_after":3160347,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":45733},"source":{"system":"sec-edgar","filing":"0001513965-17-000119","document":"wf-form4a_150343329349954.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396517000119/wf-form4a_150343329349954.xml","form_type":"4/A","original_submission_date":"2017-08-16"}},{"id":4227639,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155875,"kind":"person","name":"AMID GP Holdings, LLC","position":5,"cik":"0001715051","reported_name":"AMID GP Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":6,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":7,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":8,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":9,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2017-08-22T16:21:48.000Z","date":"2017-08-14","kind":"other","acquired":true,"shares":95701,"price":15.69,"value":1501548.69,"ownership":{"direct":false,"nature":"(1)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."}],"balance_after":7376568,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":106745},"source":{"system":"sec-edgar","filing":"0001513965-17-000119","document":"wf-form4a_150343329349954.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1715051/000151396517000119/wf-form4a_150343329349954.xml","form_type":"4/A","original_submission_date":"2017-08-16"}},{"id":4232574,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":5,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":6,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":7,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2017-08-16T21:59:46.000Z","date":"2017-08-14","kind":"other","acquired":true,"shares":41001,"price":15.69,"value":643305.69,"ownership":{"direct":false,"nature":"(3)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."}],"balance_after":3160347,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":45733},"source":{"system":"sec-edgar","filing":"0001513965-17-000117","document":"wf-form4_150293517189864.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000151396517000117/wf-form4_150293517189864.xml","form_type":"4"}},{"id":4232573,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":5,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":6,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":7,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2017-08-16T21:59:46.000Z","date":"2017-08-14","kind":"other","acquired":true,"shares":95701,"price":15.69,"value":1501548.69,"ownership":{"direct":false,"nature":"(1)"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the \"Issuer\") (\"Common Units\") at a conversion ratio of 1:1.1154 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."}],"balance_after":7376568,"derivative":{"underlying":"Common Units (limited partner interests)","underlying_shares":106745},"source":{"system":"sec-edgar","filing":"0001513965-17-000117","document":"wf-form4_150293517189864.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000151396517000117/wf-form4_150293517189864.xml","form_type":"4"}},{"id":4253875,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-07-20T12:13:07.000Z","date":"2017-07-17","kind":"sale","acquired":false,"shares":4000,"price":16,"value":64000.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43238773,"source":{"system":"sec-edgar","filing":"0001068238-17-000196","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000196/form4.xml","form_type":"4"}},{"id":4264172,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-07-05T18:05:33.000Z","date":"2017-07-03","kind":"sale","acquired":false,"shares":20526,"price":16,"value":328416.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.05, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43242773,"source":{"system":"sec-edgar","filing":"0001068238-17-000187","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000187/form4.xml","form_type":"4"}},{"id":4264171,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-07-05T18:05:33.000Z","date":"2017-06-30","kind":"sale","acquired":false,"shares":165,"price":16.01,"value":2641.65,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.02, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43263299,"source":{"system":"sec-edgar","filing":"0001068238-17-000187","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000187/form4.xml","form_type":"4"}},{"id":4269198,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-06-30T16:06:12.000Z","date":"2017-06-29","kind":"sale","acquired":false,"shares":3879,"price":16.01,"value":62102.79,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.03, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":43263464,"source":{"system":"sec-edgar","filing":"0001068238-17-000185","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000185/form4.xml","form_type":"4"}},{"id":4269197,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-06-30T16:06:12.000Z","date":"2017-06-28","kind":"sale","acquired":false,"shares":1031,"price":16.01,"value":16506.31,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.05, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":43267343,"source":{"system":"sec-edgar","filing":"0001068238-17-000185","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000185/form4.xml","form_type":"4"}},{"id":4301177,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-30T12:40:45.000Z","date":"2017-05-26","kind":"sale","acquired":false,"shares":2701,"price":16.03,"value":43297.03,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.10, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43268374,"source":{"system":"sec-edgar","filing":"0001068238-17-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000164/form4.xml","form_type":"4"}},{"id":4301176,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-30T12:40:45.000Z","date":"2017-05-25","kind":"sale","acquired":false,"shares":8289,"price":16.02,"value":132789.78,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.10, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43271075,"source":{"system":"sec-edgar","filing":"0001068238-17-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000164/form4.xml","form_type":"4"}},{"id":4304679,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-25T16:12:29.000Z","date":"2017-05-24","kind":"sale","acquired":false,"shares":12105,"price":16.22,"value":196343.1,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.10 to $16.35, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43279364,"source":{"system":"sec-edgar","filing":"0001068238-17-000162","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000162/form4.xml","form_type":"4"}},{"id":4304678,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-25T16:12:29.000Z","date":"2017-05-23","kind":"sale","acquired":false,"shares":18393,"price":16.3,"value":299805.9,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.15 to $16.43, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43291469,"source":{"system":"sec-edgar","filing":"0001068238-17-000162","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000162/form4.xml","form_type":"4"}},{"id":4308070,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-23T16:24:34.000Z","date":"2017-05-22","kind":"sale","acquired":false,"shares":16283,"price":16.2,"value":263784.6,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.35, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43309862,"source":{"system":"sec-edgar","filing":"0001068238-17-000150","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000150/form4.xml","form_type":"4"}},{"id":4308069,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-23T16:24:34.000Z","date":"2017-05-19","kind":"sale","acquired":false,"shares":17919,"price":16.17,"value":289750.23,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.29, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43326145,"source":{"system":"sec-edgar","filing":"0001068238-17-000150","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000150/form4.xml","form_type":"4"}},{"id":4311629,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-19T12:21:10.000Z","date":"2017-05-18","kind":"sale","acquired":false,"shares":10765,"price":16.02,"value":172455.3,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.12, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43344064,"source":{"system":"sec-edgar","filing":"0001068238-17-000146","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000146/form4.xml","form_type":"4"}},{"id":4311628,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-19T12:21:10.000Z","date":"2017-05-17","kind":"sale","acquired":false,"shares":11810,"price":16.23,"value":191676.3,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.15 to $16.43, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43354829,"source":{"system":"sec-edgar","filing":"0001068238-17-000146","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000146/form4.xml","form_type":"4"}},{"id":4315655,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-17T16:15:07.000Z","date":"2017-05-16","kind":"sale","acquired":false,"shares":18532,"price":16.41,"value":304110.12,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.20 to $16.74, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43366639,"source":{"system":"sec-edgar","filing":"0001068238-17-000142","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000142/form4.xml","form_type":"4"}},{"id":4315654,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-17T16:15:07.000Z","date":"2017-05-15","kind":"sale","acquired":false,"shares":10860,"price":16.77,"value":182122.2,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.73 to $16.86, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43385171,"source":{"system":"sec-edgar","filing":"0001068238-17-000142","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000142/form4.xml","form_type":"4"}},{"id":4318424,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2017-05-16T20:52:26.000Z","date":"2017-05-12","kind":"other","acquired":true,"shares":40062,"price":15.7,"value":628973.4,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time."}],"balance_after":3119346,"derivative":{"underlying":"Common Units","underlying_shares":44653},"source":{"system":"sec-edgar","filing":"0000899243-17-013430","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924317013430/doc4.xml","form_type":"4"}},{"id":4318423,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2017-05-16T20:52:26.000Z","date":"2017-05-12","kind":"other","acquired":true,"shares":93509,"price":15.7,"value":1468091.3,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1146 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1146 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1146 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1146 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1146 at any time."}],"balance_after":7280867,"derivative":{"underlying":"Common Units","underlying_shares":104225},"source":{"system":"sec-edgar","filing":"0000899243-17-013430","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924317013430/doc4.xml","form_type":"4"}},{"id":4320793,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-15T15:00:17.000Z","date":"2017-05-12","kind":"sale","acquired":false,"shares":12067,"price":16.74,"value":202001.58,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.61 to $16.87, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43396031,"source":{"system":"sec-edgar","filing":"0001068238-17-000140","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000140/form4.xml","form_type":"4"}},{"id":4320792,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-15T15:00:17.000Z","date":"2017-05-11","kind":"sale","acquired":false,"shares":9778,"price":16.81,"value":164368.18,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.70 to $16.95, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43408098,"source":{"system":"sec-edgar","filing":"0001068238-17-000140","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000140/form4.xml","form_type":"4"}},{"id":4324599,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-11T16:55:52.000Z","date":"2017-05-10","kind":"sale","acquired":false,"shares":19839,"price":16.77,"value":332700.03,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.51 to $16.89, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43417876,"source":{"system":"sec-edgar","filing":"0001068238-17-000138","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000138/form4.xml","form_type":"4"}},{"id":4324598,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-11T16:55:52.000Z","date":"2017-05-09","kind":"sale","acquired":false,"shares":28968,"price":16.5,"value":477972.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.29 to $16.65, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43437715,"source":{"system":"sec-edgar","filing":"0001068238-17-000138","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000138/form4.xml","form_type":"4"}},{"id":4328218,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-09T15:23:03.000Z","date":"2017-05-08","kind":"sale","acquired":false,"shares":31833,"price":16.42,"value":522697.86,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.14 to $16.68, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43466683,"source":{"system":"sec-edgar","filing":"0001068238-17-000134","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000134/form4.xml","form_type":"4"}},{"id":4328217,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-09T15:23:03.000Z","date":"2017-05-05","kind":"sale","acquired":false,"shares":20102,"price":16.28,"value":327260.56,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.45, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex Holdings."}],"balance_after":43498516,"source":{"system":"sec-edgar","filing":"0001068238-17-000134","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000134/form4.xml","form_type":"4"}},{"id":4331634,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-05T15:51:51.000Z","date":"2017-05-04","kind":"sale","acquired":false,"shares":33566,"price":16.19,"value":543433.54,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.00 to $16.52, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":43518618,"source":{"system":"sec-edgar","filing":"0001068238-17-000130","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000130/form4.xml","form_type":"4"}},{"id":4331633,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2017-05-05T15:51:51.000Z","date":"2017-05-03","kind":"sale","acquired":false,"shares":33742,"price":16.27,"value":548982.34,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $16.04 to $16.53, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":43552184,"source":{"system":"sec-edgar","filing":"0001068238-17-000130","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823817000130/form4.xml","form_type":"4"}},{"id":4390974,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (Limited Partner Interests)","published_at":"2017-03-10T19:11:21.000Z","date":"2017-03-08","kind":"other","acquired":true,"shares":9753425,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the completion of the acquisition of JP Energy Partners LP (\"JPE\") by the Issuer pursuant to that certain Agreement and Plan of Merger, dated as of October 23, 2016, by and among the Issuer, American Midstream GP, LLC, JPE, JPE Energy GP II LLC, Argo Merger Sub, LLC and Argo Merger GP Sub, LLC, 3,674,187 JPE common units and 14,992,654 JPE subordinated units owned by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), were converted into a total of 9,753,425 common units of the Issuer."},{"field":"shares","element":"transactionShares","label":"F1","text":"Upon the completion of the acquisition of JP Energy Partners LP (\"JPE\") by the Issuer pursuant to that certain Agreement and Plan of Merger, dated as of October 23, 2016, by and among the Issuer, American Midstream GP, LLC, JPE, JPE Energy GP II LLC, Argo Merger Sub, LLC and Argo Merger GP Sub, LLC, 3,674,187 JPE common units and 14,992,654 JPE subordinated units owned by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), were converted into a total of 9,753,425 common units of the Issuer."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Does not include (i) 7,187,358 Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\"), which do not have an expiration date and are convertible in whole or in part on an approximate 1.1027:1 basis into common units at any time after January 1, 2014, (ii) 3,079,284 Series A-2 Convertible Preferred Units held by Magnolia (as defined below), which do not have an expiration date and are convertible in whole or in part on an approximate 1.1027:1 basis into common units at any time, (iii) 8,792,205 Series C Convertible Preferred Units (the \"Series C Units\")"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) held by Magnolia Holdings, which do not have an expiration date and are convertible in whole or in part on an approximate 1:1.0036 basis into common units at any time and (iv) 2,333,333 Series D Convertible Preferred Units (the \"Series D Units\") held by Magnolia Holdings which are convertible in whole or in part on one-for-one basis, subject to anti-dilution and certain other adjustments, into common units at any time after June 30, 2017. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Busbar directly owns 2,255,754 common units out of the 13,977,709 common units reflected in Column 5. Magnolia Infrastructure Partners, LLC, an indirect, wholly owned subsidiary of Fund V (\"Magnolia\"), directly owns 618,921 common units out of the 13,977,709  common units reflected in Column 5. American Midstream GP, LLC (the \"General Partner\") directly owns 1,349,609 common units out of the 13,977,709 common units reflected in Column 5."}],"balance_after":13977709,"source":{"system":"sec-edgar","filing":"0000899243-17-007207","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924317007207/doc4.xml","form_type":"4"}},{"id":4392770,"issuer":{"id":176962,"kind":"organization","name":"JP Energy Partners LP","symbol":"JPEP"},"owners":[{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":1,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Footnotes 2 and 3"}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":2,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":3,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":4,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":5,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"SUBORDINATED UNITS (LIMITED PARTNER INTERESTS)","published_at":"2017-03-09T17:10:01.000Z","date":"2017-03-08","kind":"disposition_to_issuer","acquired":false,"shares":14992654,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC (\"Magnolia\", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC (\"ArcLight Partners\"), ArcLight Capital Holdings, LLC (\"ArcLight Holdings\"), ArcLight Energy Partners Fund V, L.P. (\"ArcLight Fund V\" and together with ArcLight Partners and ArcLight Holdings, the \"ArcLight Entities\") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the \"General Partner\"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein."}],"balance_after":0,"derivative":{"underlying":"Common Units","underlying_shares":14992654},"source":{"system":"sec-edgar","filing":"0001179110-17-004332","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000117911017004332/edgar.xml","form_type":"4"}},{"id":4392769,"issuer":{"id":176962,"kind":"organization","name":"JP Energy Partners LP","symbol":"JPEP"},"owners":[{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":1,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Footnotes 2 and 3"}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":2,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":3,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":4,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":5,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON UNITS (LIMITED PARTNER INTERESTS)","published_at":"2017-03-09T17:10:01.000Z","date":"2017-03-08","kind":"disposition_to_issuer","acquired":false,"shares":3674187,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Converted into common units of American Midstream Partners, LP (\"AMID\") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the \"Merger\").  On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit.  Each  issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Converted into common units of American Midstream Partners, LP (\"AMID\") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the \"Merger\").  On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit.  Each  issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC (\"Magnolia\", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC (\"ArcLight Partners\"), ArcLight Capital Holdings, LLC (\"ArcLight Holdings\"), ArcLight Energy Partners Fund V, L.P. (\"ArcLight Fund V\" and together with ArcLight Partners and ArcLight Holdings, the \"ArcLight Entities\") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the \"General Partner\"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001179110-17-004332","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000117911017004332/edgar.xml","form_type":"4"}},{"id":4445878,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2017-02-15T21:28:55.000Z","date":"2017-02-13","kind":"other","acquired":true,"shares":47742,"price":15.87,"value":757665.54,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."}],"balance_after":3079284,"derivative":{"underlying":"Common Units","underlying_shares":52478},"source":{"system":"sec-edgar","filing":"0000899243-17-004320","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924317004320/doc4.xml","form_type":"4"}},{"id":4445877,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2017-02-15T21:28:55.000Z","date":"2017-02-13","kind":"other","acquired":true,"shares":111436,"price":15.87,"value":1768489.32,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."}],"balance_after":7187358,"derivative":{"underlying":"Common Units","underlying_shares":122490},"source":{"system":"sec-edgar","filing":"0000899243-17-004320","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924317004320/doc4.xml","form_type":"4"}},{"id":4533521,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Units (Limited Partner Interests)","published_at":"2016-12-05T14:51:59.000Z","date":"2016-12-01","kind":"purchase","acquired":true,"shares":626304,"price":14.32,"value":8968673.28,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Common units were purchased from AIM Midstream Holdings, LLC by Busbar II, LLC (\"Busbar\"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. (\"Fund V\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Does not include (i) 7,075,922 Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\"), which do not have an expiration date and are convertible in whole or in part on an approximate 1.0992:1 basis into common units at any time after January 1, 2014, (ii) 3,031,542 Series A-2 Convertible Preferred Units held by Magnolia (as defined below), which do not have an expiration date and are convertible in whole or in part on an approximate 1.0992:1 basis into common units at any time, (iii) 8,792,205 Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\"), which do not have an expiration date and are convertible in whole or in part on an approximate 1:1.0007 basis into common units at any time and (iv) 2,333,333 Series D Convertible Preferred Units (the \"Series D Units\")"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) held directly by Magnolia Holdings and are convertible in whole or in part on one-for-one basis, subject to anti-dilution and certain other adjustments, into common units at any time after June 30, 2017. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Busbar directly owns 2,255,754 common units out of the 4,224,284 common units reflected in Column 5. Magnolia Infrastructure Partners, LLC, an indirect, wholly owned subsidiary of Fund V (\"Magnolia\"), directly owns 618,921 common units out of the 4,224,284 common units reflected in Column 5. American Midstream GP, LLC (the \"General Partner\") directly owns 1,349,609 common units out of the 4,224,284 common units reflected in Column 5."}],"balance_after":4224284,"source":{"system":"sec-edgar","filing":"0000899243-16-034891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316034891/doc4.xml","form_type":"4"}},{"id":4536995,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-12-01T12:39:51.000Z","date":"2016-11-29","kind":"sale","acquired":false,"shares":1424281,"price":14,"value":19939934.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex.  The 1,424,281 Common Units reported in Box 4 were sold by Enogex Holdings.  As a result of this deposition, Enogex Holdings is no longer the direct owner of any Common Units."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex.  The 1,424,281 Common Units reported in Box 4 were sold by Enogex Holdings.  As a result of this deposition, Enogex Holdings is no longer the direct owner of any Common Units."}],"balance_after":43585926,"source":{"system":"sec-edgar","filing":"0001068238-16-000603","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000603/form4.xml","form_type":"4"}},{"id":4553004,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Units","published_at":"2016-11-16T19:23:05.000Z","date":"2016-11-14","kind":"other","acquired":true,"shares":127737,"price":13.99,"value":1787040.63,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"kind","element":"transactionCoding","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Represents the aggregate number of Series C Units held after the acquisition of Series C Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."}],"balance_after":8792205,"derivative":{"underlying":"Common Units","underlying_shares":127826},"source":{"system":"sec-edgar","filing":"0000899243-16-033707","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316033707/doc4.xml","form_type":"4"}},{"id":4553003,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2016-11-16T19:23:05.000Z","date":"2016-11-14","kind":"other","acquired":true,"shares":46870,"price":15.92,"value":746170.4,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time."}],"balance_after":3031542,"derivative":{"underlying":"Common Units","underlying_shares":51520},"source":{"system":"sec-edgar","filing":"0000899243-16-033707","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316033707/doc4.xml","form_type":"4"}},{"id":4553002,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2016-11-16T19:23:05.000Z","date":"2016-11-14","kind":"other","acquired":true,"shares":109399,"price":15.92,"value":1741632.08,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.0992 at any time."}],"balance_after":7075922,"derivative":{"underlying":"Common Units","underlying_shares":120251},"source":{"system":"sec-edgar","filing":"0000899243-16-033707","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316033707/doc4.xml","form_type":"4"}},{"id":4565311,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-11-07T16:11:16.000Z","date":"2016-11-03","kind":"sale","acquired":false,"shares":14198,"price":14.46,"value":205303.08,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.35 to $14.61, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnote (3) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45010207,"source":{"system":"sec-edgar","filing":"0001068238-16-000587","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000587/form4.xml","form_type":"4"}},{"id":4567697,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-11-03T16:37:57.000Z","date":"2016-11-02","kind":"sale","acquired":false,"shares":706793,"price":14.49,"value":10241430.57,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.30 to $14.85, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45024405,"source":{"system":"sec-edgar","filing":"0001068238-16-000585","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000585/form4.xml","form_type":"4"}},{"id":4567696,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-11-03T16:37:57.000Z","date":"2016-11-01","kind":"sale","acquired":false,"shares":43206,"price":14.48,"value":625622.88,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.28 to $14.92, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45731198,"source":{"system":"sec-edgar","filing":"0001068238-16-000585","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000585/form4.xml","form_type":"4"}},{"id":4569472,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Convertible Preferred Units","published_at":"2016-11-02T18:57:27.000Z","date":"2016-10-31","kind":"purchase","acquired":true,"shares":2333333,"price":15,"value":34999995.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Represents Series D Convertible Preferred Units (the \"Series D Units\") purchased by Magnolia Holdings.  The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"kind","element":"transactionCoding","label":"F7","text":"Represents Series D Convertible Preferred Units (the \"Series D Units\") purchased by Magnolia Holdings.  The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"Represents Series D Convertible Preferred Units (the \"Series D Units\") purchased by Magnolia Holdings.  The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Represents Series D Convertible Preferred Units (the \"Series D Units\") purchased by Magnolia Holdings.  The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Represents Series D Convertible Preferred Units (the \"Series D Units\") purchased by Magnolia Holdings.  The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series D Units."}],"balance_after":2333333,"derivative":{"underlying":"Common Units","underlying_shares":2333333},"source":{"system":"sec-edgar","filing":"0000899243-16-032661","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316032661/doc4.xml","form_type":"4"}},{"id":4569471,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Units","published_at":"2016-11-02T18:57:27.000Z","date":"2016-08-12","kind":"other","acquired":true,"shares":93039,"price":14,"value":1302546.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."},{"field":"kind","element":"transactionCoding","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Represents the aggregate number of Series C Units held after the acquisition of Series C Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents Series C Convertible Preferred Units (the \"Series C Units\") held directly by Magnolia Infrastructure Holdings, LLC (\"Magnolia Holdings\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer."}],"balance_after":8664468,"derivative":{"underlying":"Common Units","underlying_shares":93039},"source":{"system":"sec-edgar","filing":"0000899243-16-032661","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316032661/doc4.xml","form_type":"4"}},{"id":4569470,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Units","published_at":"2016-11-02T18:57:27.000Z","date":"2016-08-12","kind":"other","acquired":true,"shares":46145,"price":15.94,"value":735551.3,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents Series A-2 Convertible Preferred Units (the \"Series A-2 Units\") held by Magnolia Infrastructure Partners, LLC (\"Magnolia\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time."}],"balance_after":2984672,"derivative":{"underlying":"Common Units","underlying_shares":50652},"source":{"system":"sec-edgar","filing":"0000899243-16-032661","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316032661/doc4.xml","form_type":"4"}},{"id":4569469,"issuer":{"id":155869,"kind":"organization","name":"Third Coast Midstream, LLC","symbol":"AMID"},"owners":[{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":1,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"SEE REMARKS"}},{"id":155871,"kind":"person","name":"Magnolia Infrastructure Holdings, LLC","position":2,"cik":"0001673060","reported_name":"Magnolia Infrastructure Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155872,"kind":"person","name":"Magnolia Infrastructure Partners, LLC","position":3,"cik":"0001638285","reported_name":"Magnolia Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155874,"kind":"person","name":"High Point Infrastructure Partners, LLC","position":4,"cik":"0001575227","reported_name":"High Point Infrastructure Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":5,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":6,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":7,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":155873,"kind":"person","name":"American Midstream GP, LLC","position":8,"cik":"0001526603","reported_name":"American Midstream GP, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Units","published_at":"2016-11-02T18:57:27.000Z","date":"2016-08-12","kind":"other","acquired":true,"shares":107708,"price":15.94,"value":1716865.52,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.098 at any time."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.098 at any time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.098 at any time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.098 at any time."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents Series A-1 Convertible Preferred Units (the \"Series A-1 Units\") held directly by High Point Infrastructure Partners, LLC (\"HPIP\") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer (\"Common Units\") at a conversion ratio of 1:1.098 at any time."}],"balance_after":6966523,"derivative":{"underlying":"Common Units","underlying_shares":118227},"source":{"system":"sec-edgar","filing":"0000899243-16-032661","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1673060/000089924316032661/doc4.xml","form_type":"4"}},{"id":4570867,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-11-01T15:58:29.000Z","date":"2016-10-31","kind":"sale","acquired":false,"shares":32710,"price":14.59,"value":477238.9,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.44 to $14.77, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45774404,"source":{"system":"sec-edgar","filing":"0001068238-16-000581","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000581/form4.xml","form_type":"4"}},{"id":4570866,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-11-01T15:58:29.000Z","date":"2016-10-28","kind":"sale","acquired":false,"shares":25615,"price":14.89,"value":381407.35,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.46 to $15.32, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45807114,"source":{"system":"sec-edgar","filing":"0001068238-16-000581","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000581/form4.xml","form_type":"4"}},{"id":4572923,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-28T15:53:42.000Z","date":"2016-10-27","kind":"sale","acquired":false,"shares":10939,"price":14.93,"value":163319.27,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $14.80 to $15.17, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45832729,"source":{"system":"sec-edgar","filing":"0001068238-16-000579","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000579/form4.xml","form_type":"4"}},{"id":4572922,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-28T15:53:42.000Z","date":"2016-10-26","kind":"sale","acquired":false,"shares":7537,"price":15.01,"value":113130.37,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.00 to $15.05, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45843668,"source":{"system":"sec-edgar","filing":"0001068238-16-000579","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000579/form4.xml","form_type":"4"}},{"id":4573980,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-26T16:15:18.000Z","date":"2016-10-25","kind":"sale","acquired":false,"shares":12224,"price":15.07,"value":184215.68,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.00 to $15.34, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45851205,"source":{"system":"sec-edgar","filing":"0001068238-16-000577","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000577/form4.xml","form_type":"4"}},{"id":4573979,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-26T16:15:18.000Z","date":"2016-10-24","kind":"sale","acquired":false,"shares":24683,"price":15.1,"value":372713.3,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.00 to $15.37, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45863429,"source":{"system":"sec-edgar","filing":"0001068238-16-000577","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000577/form4.xml","form_type":"4"}},{"id":4575538,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-24T16:36:01.000Z","date":"2016-10-21","kind":"sale","acquired":false,"shares":18689,"price":15.28,"value":285567.92,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.14 to $15.60, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45888112,"source":{"system":"sec-edgar","filing":"0001068238-16-000565","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000565/form4.xml","form_type":"4"}},{"id":4575537,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-24T16:36:01.000Z","date":"2016-10-20","kind":"sale","acquired":false,"shares":45485,"price":15.49,"value":704562.65,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.20 to $15.69, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45906801,"source":{"system":"sec-edgar","filing":"0001068238-16-000565","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000565/form4.xml","form_type":"4"}},{"id":4576931,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-20T15:48:28.000Z","date":"2016-10-19","kind":"sale","acquired":false,"shares":21600,"price":15.59,"value":336744.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.36 to $15.74, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45952286,"source":{"system":"sec-edgar","filing":"0001068238-16-000558","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000558/form4.xml","form_type":"4"}},{"id":4576930,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-20T15:48:28.000Z","date":"2016-10-18","kind":"sale","acquired":false,"shares":22319,"price":15.43,"value":344382.17,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.26 to $15.56, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45973886,"source":{"system":"sec-edgar","filing":"0001068238-16-000558","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000558/form4.xml","form_type":"4"}},{"id":4578264,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-18T16:16:44.000Z","date":"2016-10-17","kind":"sale","acquired":false,"shares":41113,"price":15.18,"value":624095.34,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.00 to $15.63, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":45996205,"source":{"system":"sec-edgar","filing":"0001068238-16-000556","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000556/form4.xml","form_type":"4"}},{"id":4578263,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-18T16:16:44.000Z","date":"2016-10-14","kind":"sale","acquired":false,"shares":10888,"price":15.39,"value":167566.32,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.27 to $15.76, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":46037318,"source":{"system":"sec-edgar","filing":"0001068238-16-000556","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000556/form4.xml","form_type":"4"}},{"id":4578999,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-17T08:01:27.000Z","date":"2016-10-13","kind":"sale","acquired":false,"shares":21506,"price":15.6,"value":335493.6,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.22 to $15.80, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":46048206,"source":{"system":"sec-edgar","filing":"0001068238-16-000553","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000553/form4.xml","form_type":"4"}},{"id":4578998,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-17T08:01:27.000Z","date":"2016-10-12","kind":"sale","acquired":false,"shares":12053,"price":15.7,"value":189232.1,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.59 to $15.83, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":46069712,"source":{"system":"sec-edgar","filing":"0001068238-16-000553","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000553/form4.xml","form_type":"4"}},{"id":4579595,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-14T16:16:59.000Z","date":"2016-10-13","kind":"sale","acquired":false,"shares":21506,"price":15.6,"value":335493.6,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.22 to $15.80, inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":46048206,"source":{"system":"sec-edgar","filing":"0001068238-16-000552","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000552/form4.xml","form_type":"4"}},{"id":4579594,"issuer":{"id":132825,"kind":"organization","name":"Enable Midstream Partners, LP","symbol":"ENBL"},"owners":[{"id":106425,"kind":"organization","name":"ArcLight Capital Partners, LLC","position":1,"cik":"0001502945","reported_name":"ArcLight Capital Partners, LLC","relationship":{"ten_percent_owner":true}},{"id":155876,"kind":"person","name":"ArcLight Capital Holdings, LLC","position":2,"cik":"0001441290","reported_name":"ArcLight Capital Holdings, LLC","relationship":{"ten_percent_owner":true}},{"id":174315,"kind":"organization","name":"Bronco Midstream Infrastructure, LLC","position":3,"cik":"0001605222","reported_name":"Bronco Midstream Infrastructure, LLC","relationship":{"ten_percent_owner":true}},{"id":174316,"kind":"organization","name":"Enogex Holdings LLC","position":4,"cik":"0001605216","reported_name":"Enogex Holdings LLC","relationship":{"ten_percent_owner":true}},{"id":174317,"kind":"organization","name":"ArcLight Energy Partners Fund IV LP","position":5,"cik":"0001399007","reported_name":"ArcLight Energy Partners Fund IV LP","relationship":{"ten_percent_owner":true}},{"id":155870,"kind":"person","name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","position":6,"cik":"0001502553","reported_name":"ARCLIGHT ENERGY PARTNERS FUND V, L.P.","relationship":{"ten_percent_owner":true}},{"id":174318,"kind":"organization","name":"Bronco Midstream Partners, L.P.","position":7,"cik":"0001605221","reported_name":"Bronco Midstream Partners, L.P.","relationship":{"ten_percent_owner":true}},{"id":96039,"kind":"person","name":"Revers Daniel R","position":8,"cik":"0001405456","reported_name":"Revers Daniel R","relationship":{"ten_percent_owner":true}}],"security":"Common Units representing limited partners interests","published_at":"2016-10-14T16:16:59.000Z","date":"2016-10-12","kind":"sale","acquired":false,"shares":12053,"price":15.7,"value":189232.1,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These Common Units were sold in multiple transactions at prices ranging from $15.59 to $15.83, inclusive.  The reporting person undertakes to provide to Enable Midstream Partners, LP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Units sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is filed jointly by ArcLight Capital Partners, LLC (\"ArcLight Capital Partners\"), ArcLight Capital Holdings, LLC, ArcLight Energy Partners Fund V, L.P. (\"Fund V\"), ArcLight Energy Partners Fund IV, L.P. (\"Fund IV\"), Bronco Midstream Partners, L.P. (\"Bronco Midstream\"), Bronco Midstream Infrastructure, LLC (\"Bronco Infrastructure\") and Enogex Holdings LLC (\"Enogex Holdings\") and collectively with the foregoing and their respective general partners and subsidiaries \"ArcLight\").  ArcLight Capital Partners has ultimate voting and investment control over the securities reported herein.  Due to certain voting rights granted to Mr. Revers as a member of ArcLight Capital Partners' investment committee, Mr. Revers may be deemed to indirectly beneficially own the units attributable to ArcLight Capital Partners, LLC, but disclaims any such ownership except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Common Units are held directly by Bronco Infrastructure and Enogex.  ArcLight Capital Partners is the investment advisor for, and ArcLight Capital Holdings, LLC is the managing member of the general partner of each of Fund IV, Fund V and Bronco Midstream.  Bronco Infrastructure is an indirect wholly-owned subsidiary of Enogex."}],"balance_after":46069712,"source":{"system":"sec-edgar","filing":"0001068238-16-000552","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1441290/000106823816000552/form4.xml","form_type":"4"}}]}