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Citigroup Financial Products Inc. (\"CFP\") is the sole stockholder of CGMI. Citigroup Global Markets Holdings Inc. (\"CGMH\") is the sole\nstockholder of CFP. Citigroup Inc. is the sole stockholder of CGMH."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-20-023752","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831001/000120919120023752/doc4.xml","form_type":"4"}},{"id":392539,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Variable Rate Demand Preferred Shares","published_at":"2020-03-30T20:26:55.000Z","date":"2020-03-27","kind":"sale","acquired":false,"shares":656,"price":100000,"value":65600000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The Variable Rate Demand Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Citigroup Global Markets Inc.\n(\"CGMI\"). Citigroup Financial Products Inc. (\"CFP\") is the sole stockholder of CGMI. Citigroup Global Markets Holdings Inc. (\"CGMH\") is the sole\nstockholder of CFP. Citigroup Inc. is the sole stockholder of CGMH."}],"balance_after":1935,"source":{"system":"sec-edgar","filing":"0001209191-20-021715","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831001/000120919120021715/doc4.xml","form_type":"4"}},{"id":392538,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Variable Rate Demand Preferred Shares","published_at":"2020-03-30T20:26:55.000Z","date":"2020-03-26","kind":"sale","acquired":false,"shares":500,"price":100000,"value":50000000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The Variable Rate Demand Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Citigroup Global Markets Inc.\n(\"CGMI\"). Citigroup Financial Products Inc. (\"CFP\") is the sole stockholder of CGMI. Citigroup Global Markets Holdings Inc. (\"CGMH\") is the sole\nstockholder of CFP. Citigroup Inc. is the sole stockholder of CGMH."}],"balance_after":2591,"source":{"system":"sec-edgar","filing":"0001209191-20-021715","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831001/000120919120021715/doc4.xml","form_type":"4"}},{"id":110484,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2824,"kind":"organization","name":"WELLS FARGO & COMPANY/MN","symbol":"WFC","position":1,"cik":"0000072971","reported_name":"WELLS FARGO & COMPANY/MN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":10673,"kind":"organization","name":"Wells Fargo Municipal Capital Strategies, LLC","position":2,"cik":"0001585457","reported_name":"Wells Fargo Municipal Capital Strategies, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11391,"kind":"organization","name":"WELLS FARGO BANK N A","position":3,"cik":"0000740906","reported_name":"WELLS FARGO BANK N A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Adjustable Rate MuniFund Term Preferred Shares","published_at":"2019-11-20T17:31:50.000Z","date":"2019-11-18","kind":"other","acquired":true,"shares":1120,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"In connection with the reorganization of Nuveen Connecticut Quality Municipal Income Fund into Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\"), 1,120 adjustable rate munifund term preferred shares beneficially owned by Wells Fargo Municipal Capital Strategies, LLC (\"Capital Strategies\") were exchanged for an equal number of adjustable rate munifund term preferred shares (\"AMTP Shares\"), Series 2028, of the Issuer in a cashless transaction. The 1,120 AMTP Shares reported as acquired in Table I represent AMTP Shares beneficially owned by Capital Strategies."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the reorganization of Nuveen Connecticut Quality Municipal Income Fund into Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\"), 1,120 adjustable rate munifund term preferred shares beneficially owned by Wells Fargo Municipal Capital Strategies, LLC (\"Capital Strategies\") were exchanged for an equal number of adjustable rate munifund term preferred shares (\"AMTP Shares\"), Series 2028, of the Issuer in a cashless transaction. The 1,120 AMTP Shares reported as acquired in Table I represent AMTP Shares beneficially owned by Capital Strategies."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"This statement is jointly filed by Wells Fargo, Capital Strategies and WFBNA.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiaries Capital Strategies and WFBNA.  Capital Strategies and WFBNA are each indirect wholly owned subsidiaries of Wells Fargo.  Following additional issuances of securities by the Issuer, none of Wells Fargo, WFBNA, or WFMCS currently hold more than 10% of the class of securities of the Issuer."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer."}],"balance_after":1120,"source":{"system":"sec-edgar","filing":"0000899243-19-027666","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/72971/000089924319027666/doc4.xml","form_type":"4"}},{"id":3425143,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":130570,"kind":"person","name":"ZIMMERMAN GIFFORD R","position":1,"cik":"0001189654","reported_name":"ZIMMERMAN GIFFORD R","relationship":{"officer":true,"officer_title":"Secretary"}}],"security":"Common Stock","published_at":"2019-09-03T19:17:42.000Z","date":"2019-08-29","kind":"sale","acquired":false,"shares":1957,"price":16.786,"value":32850.202,"ownership":{"direct":true},"balance_after":0,"source":{"system":"sec-edgar","filing":"0001225208-19-012022","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000122520819012022/doc4.xml","form_type":"4"}},{"id":401886,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series 1 Variable Rate Demand Preferred Shares","published_at":"2019-06-24T16:07:33.000Z","date":"2019-06-20","kind":"sale","acquired":false,"shares":1790,"price":100000,"value":179000000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"These shares are beneficially owned by Citibank, N.A. (\"Citibank\"). Citicorp LLC (\"Citicorp\") is the sole stockholder of Citibank. Citigroup Inc. is the sole stockholder of Citicorp."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-19-038696","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831001/000120919119038696/doc4.xml","form_type":"4"}},{"id":117723,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2824,"kind":"organization","name":"WELLS FARGO & COMPANY/MN","symbol":"WFC","position":1,"cik":"0000072971","reported_name":"WELLS FARGO & COMPANY/MN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11391,"kind":"organization","name":"WELLS FARGO BANK N A","position":2,"cik":"0000740906","reported_name":"WELLS FARGO BANK N A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"MuniFund Preferred Shares","published_at":"2019-04-05T19:49:07.000Z","date":"2019-03-12","kind":"other","acquired":false,"shares":2000,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The 2,000 preferred shares reported as disposed of in Table I represent MuniFund Preferred Shares (\"MFP Shares\") that were beneficially owned by Wells Fargo Bank, National Association (\"WFBNA\"). The MFP Shares were disposed of as a result of a redemption by the Issuer for a redemption price of $100,078.45062 per share (which includes a liquidation preference of $100,000.00 per share and accrued dividends of 78.45062 per share).  WFBNA is an indirect wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"kind","element":"transactionCoding","label":"F2","text":"This statement is jointly filed by Wells Fargo and WFBNA.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary WFBNA."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The 2,000 preferred shares reported as disposed of in Table I represent MuniFund Preferred Shares (\"MFP Shares\") that were beneficially owned by Wells Fargo Bank, National Association (\"WFBNA\"). The MFP Shares were disposed of as a result of a redemption by the Issuer for a redemption price of $100,078.45062 per share (which includes a liquidation preference of $100,000.00 per share and accrued dividends of 78.45062 per share).  WFBNA is an indirect wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"This statement is jointly filed by Wells Fargo and WFBNA.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary WFBNA."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer."}],"balance_after":2054,"source":{"system":"sec-edgar","filing":"0000899243-19-010117","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/72971/000089924319010117/doc4.xml","form_type":"4"}},{"id":3725369,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":24310,"kind":"person","name":"BRENNAN PAUL L","position":1,"cik":"0001189639","reported_name":"BRENNAN PAUL L","relationship":{"other":true,"other_text":"Portfolio Manager"}}],"security":"Common Stock","published_at":"2018-12-19T23:54:40.000Z","date":"2018-12-17","kind":"purchase","acquired":true,"shares":10300,"price":13.58,"value":139874.0,"ownership":{"direct":true},"balance_after":18050,"source":{"system":"sec-edgar","filing":"0001225208-18-016932","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000122520818016932/doc4.xml","form_type":"4"}},{"id":413940,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series 4 Variable Rate Demand Preferred Shares","published_at":"2018-06-22T20:09:16.000Z","date":"2018-06-20","kind":"sale","acquired":false,"shares":1800,"price":100000,"value":180000000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"These Shares are beneficially owned by Citibank, N.A. (\"Citibank\"). Citicorp LLC (\"Citicorp\") is the sole stockholder of Citibank. Citigroup Inc. is the sole stockholder of Citicorp."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-18-039160","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831001/000120919118039160/doc4.xml","form_type":"4"}},{"id":133211,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2824,"kind":"organization","name":"WELLS FARGO & COMPANY/MN","symbol":"WFC","position":1,"cik":"0000072971","reported_name":"WELLS FARGO & COMPANY/MN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11391,"kind":"organization","name":"WELLS FARGO BANK N A","position":2,"cik":"0000740906","reported_name":"WELLS FARGO BANK N A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"MuniFund Preferred Shares","published_at":"2018-01-31T22:50:26.000Z","date":"2018-01-29","kind":"other","acquired":true,"shares":4054,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The disposition of shares occurred pursuant to a Purchase and Exchange Agreement among the Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\") and Wells Fargo Bank, National Association (the \"Bank\") pursuant to which the Bank exchanged 2,404 existing Variable Rate MuniFund Term Preferred Shares, Series 2018, of the Issuer for an equal number of newly issued Series A MuniFund Preferred Shares of the Issuer (\"MFP Shares\") and purchased 1,650 newly issued MFP Shares, for a purchase price of $100,000 per share.  The Bank is a wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"kind","element":"transactionCoding","label":"F2","text":"This statement is jointly filed by Wells Fargo and the Bank.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary the Bank."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The disposition of shares occurred pursuant to a Purchase and Exchange Agreement among the Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\") and Wells Fargo Bank, National Association (the \"Bank\") pursuant to which the Bank exchanged 2,404 existing Variable Rate MuniFund Term Preferred Shares, Series 2018, of the Issuer for an equal number of newly issued Series A MuniFund Preferred Shares of the Issuer (\"MFP Shares\") and purchased 1,650 newly issued MFP Shares, for a purchase price of $100,000 per share.  The Bank is a wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"This statement is jointly filed by Wells Fargo and the Bank.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary the Bank."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer."}],"balance_after":4054,"source":{"system":"sec-edgar","filing":"0000899243-18-002424","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/72971/000089924318002424/doc4.xml","form_type":"4"}},{"id":133210,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2824,"kind":"organization","name":"WELLS FARGO & COMPANY/MN","symbol":"WFC","position":1,"cik":"0000072971","reported_name":"WELLS FARGO & COMPANY/MN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11391,"kind":"organization","name":"WELLS FARGO BANK N A","position":2,"cik":"0000740906","reported_name":"WELLS FARGO BANK N A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Variable Rate MuniFund Term Preferred Shares, Series 2018","published_at":"2018-01-31T22:50:26.000Z","date":"2018-01-29","kind":"other","acquired":false,"shares":2404,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The disposition of shares occurred pursuant to a Purchase and Exchange Agreement among the Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\") and Wells Fargo Bank, National Association (the \"Bank\") pursuant to which the Bank exchanged 2,404 existing Variable Rate MuniFund Term Preferred Shares, Series 2018, of the Issuer for an equal number of newly issued Series A MuniFund Preferred Shares of the Issuer (\"MFP Shares\") and purchased 1,650 newly issued MFP Shares, for a purchase price of $100,000 per share.  The Bank is a wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"kind","element":"transactionCoding","label":"F2","text":"This statement is jointly filed by Wells Fargo and the Bank.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary the Bank."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The disposition of shares occurred pursuant to a Purchase and Exchange Agreement among the Nuveen AMT-Free Municipal Credit Income Fund (the \"Issuer\") and Wells Fargo Bank, National Association (the \"Bank\") pursuant to which the Bank exchanged 2,404 existing Variable Rate MuniFund Term Preferred Shares, Series 2018, of the Issuer for an equal number of newly issued Series A MuniFund Preferred Shares of the Issuer (\"MFP Shares\") and purchased 1,650 newly issued MFP Shares, for a purchase price of $100,000 per share.  The Bank is a wholly owned subsidiary of Wells Fargo & Company (\"Wells Fargo\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"This statement is jointly filed by Wells Fargo and the Bank.  Wells Fargo holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary the Bank."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-18-002424","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/72971/000089924318002424/doc4.xml","form_type":"4"}},{"id":4212956,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":29473,"kind":"person","name":"TOTH TERENCE J","position":1,"cik":"0001277392","reported_name":"TOTH TERENCE J","relationship":{"other":true,"other_text":"Trustee"}}],"security":"Common Stock","published_at":"2017-09-11T17:16:25.000Z","date":"2017-09-06","kind":"purchase","acquired":true,"shares":1277,"price":15.6557,"value":19992.3289,"ownership":{"direct":true},"balance_after":1277,"source":{"system":"sec-edgar","filing":"0001225208-17-014785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000122520817014785/doc4.xml","form_type":"4"}},{"id":4443404,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":24310,"kind":"person","name":"BRENNAN PAUL L","position":1,"cik":"0001189639","reported_name":"BRENNAN PAUL L","relationship":{"other":true,"other_text":"Portfolio Manager"}}],"security":"Common Stock","published_at":"2017-02-17T02:01:08.000Z","date":"2017-02-16","kind":"purchase","acquired":true,"shares":1800,"price":14.349,"value":25828.2,"ownership":{"direct":true},"balance_after":7750,"source":{"system":"sec-edgar","filing":"0001225208-17-003639","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000122520817003639/doc4.xml","form_type":"4"}},{"id":437266,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series 4 Variable Rate Demand Preferred Shares","published_at":"2016-06-17T18:20:40.000Z","date":"2016-06-16","kind":"purchase","acquired":true,"shares":1800,"price":100000,"value":180000000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"These Shares are beneficially owned by Citibank, N.A. (\"Citibank\"). Citicorp is the sole stockholder of Citibank. Citigroup Inc. is the sole stockholder of Citicorp."}],"balance_after":1800,"source":{"system":"sec-edgar","filing":"0001209191-16-128428","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000120919116128428/doc4.xml","form_type":"4"}},{"id":460397,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Variable Rate Demand Preferred Shares","published_at":"2014-10-21T20:41:21.000Z","date":"2014-10-21","kind":"other","acquired":false,"shares":220,"price":100000,"value":22000000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These Variable Rate Demand Preferred shares (\"Shares\") were called for redemption by the issuer."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These Shares are beneficially owned by Citibank, N.A. (\"Citibank\"). Citicorp is the sole stockholder of Citibank. Citigroup Inc. is the sole stockholder of Citicorp."}],"balance_after":1790,"source":{"system":"sec-edgar","filing":"0001181431-14-034598","document":"rrd417830.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000118143114034598/rrd417830.xml","form_type":"4"}},{"id":199046,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2801,"kind":"organization","name":"BANK OF AMERICA CORP /DE/","symbol":"BAC","position":1,"cik":"0000070858","reported_name":"BANK OF AMERICA CORP /DE/","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":10345,"kind":"organization","name":"BANK OF AMERICA NA","position":2,"cik":"0001102113","reported_name":"BANK OF AMERICA NA","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11472,"kind":"organization","name":"Blue Ridge Investments, L.L.C.","position":3,"cik":"0001453700","reported_name":"Blue Ridge Investments, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Auction Rate Preferred","published_at":"2011-10-05T20:13:30.000Z","date":"2011-10-05","kind":"other","acquired":false,"shares":102,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The Auction Rate Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Bank of America, N.A. (\"BANA\") and Blue Ridge Investors, L.L.C. (\"Blue Ridge\").  BANA is a wholly owned subsidiary of Bank of America Corporation (\"Bank of America\") and Blue Ridge is a wholly owned subsidiary of BANA."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The Shares were called for redemption by the issuer at par value."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Shares were called for redemption by the issuer at par value."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The Auction Rate Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Bank of America, N.A. (\"BANA\") and Blue Ridge Investors, L.L.C. (\"Blue Ridge\").  BANA is a wholly owned subsidiary of Bank of America Corporation (\"Bank of America\") and Blue Ridge is a wholly owned subsidiary of BANA."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000932440-11-001084","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000093244011001084/edgar.xml","form_type":"4"}},{"id":500546,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Auction Rate Preferred","published_at":"2011-10-05T20:10:43.000Z","date":"2011-10-05","kind":"other","acquired":false,"shares":179,"price":25000,"value":4475000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These Auction Preferred Shares (\"Shares\") were called for redemption by the issuer."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Shares reported in Table I represent Shares beneficially owned by Citigroup Global Markets Inc. (\"CGMI\"). Citigroup Financial Products Inc. (\"CFP\") is the sole stockholder of CGMI. Citigroup Global Markets Holdings Inc. (\"CGMH\") is the sole stockholder of CFP. Citigroup Inc. is the sole stockholder of CGMH."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001181431-11-051852","document":"rrd323376.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000118143111051852/rrd323376.xml","form_type":"4"}},{"id":199105,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2801,"kind":"organization","name":"BANK OF AMERICA CORP /DE/","symbol":"BAC","position":1,"cik":"0000070858","reported_name":"BANK OF AMERICA CORP /DE/","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":10345,"kind":"organization","name":"BANK OF AMERICA NA","position":2,"cik":"0001102113","reported_name":"BANK OF AMERICA NA","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11472,"kind":"organization","name":"Blue Ridge Investments, L.L.C.","position":3,"cik":"0001453700","reported_name":"Blue Ridge Investments, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Auction Rate Preferred","published_at":"2011-10-04T14:44:07.000Z","date":"2011-10-03","kind":"other","acquired":false,"shares":87,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The Auction Rate Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Bank of America, N.A. 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BANA is a wholly owned subsidiary of Bank of America Corporation (\"Bank of America\") and Blue Ridge is a wholly owned subsidiary of BANA."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000932440-11-001072","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000093244011001072/edgar.xml","form_type":"4"}},{"id":199104,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2801,"kind":"organization","name":"BANK OF AMERICA CORP /DE/","symbol":"BAC","position":1,"cik":"0000070858","reported_name":"BANK OF AMERICA CORP /DE/","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":10345,"kind":"organization","name":"BANK OF AMERICA NA","position":2,"cik":"0001102113","reported_name":"BANK OF AMERICA NA","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":11472,"kind":"organization","name":"Blue Ridge Investments, L.L.C.","position":3,"cik":"0001453700","reported_name":"Blue Ridge Investments, L.L.C.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Auction Rate Preferred","published_at":"2011-10-04T14:44:07.000Z","date":"2011-09-30","kind":"other","acquired":false,"shares":112,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The Auction Rate Preferred Shares (\"Shares\") reported in Table I represent Shares beneficially owned by Bank of America, N.A. 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BANA is a wholly owned subsidiary of Bank of America Corporation (\"Bank of America\") and Blue Ridge is a wholly owned subsidiary of BANA."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000932440-11-001072","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1090116/000093244011001072/edgar.xml","form_type":"4"}},{"id":500690,"issuer":{"id":1400,"kind":"organization","name":"Nuveen AMT-Free Municipal Credit Income Fund","symbol":"NVG"},"owners":[{"id":2837,"kind":"organization","name":"CITIGROUP INC","position":1,"cik":"0000831001","reported_name":"CITIGROUP INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Auction Rate Preferred","published_at":"2011-10-03T21:01:09.000Z","date":"2011-10-03","kind":"other","acquired":false,"shares":172,"price":25000,"value":4300000.0,"ownership":{"direct":false,"nature":"By Subsidiary"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These Auction Preferred Shares (\"Shares\") were called for redemption by the issuer."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Shares reported in Table I represent Shares beneficially owned by Citigroup Global Markets Inc. 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