{"transactions":[{"id":3989175,"issuer":{"id":1196,"kind":"organization","name":"Rapid7, Inc.","symbol":"RPD"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106566,"kind":"organization","name":"Bain Capital Venture Partners 2007, L.P.","position":2,"cik":"0001408678","reported_name":"Bain Capital Venture Partners 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106567,"kind":"organization","name":"Bain Capital Venture Fund 2007, L.P.","position":3,"cik":"0001408677","reported_name":"Bain Capital Venture Fund 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105409,"kind":"organization","name":"BCIP Venture Associates","position":4,"cik":"0001408649","reported_name":"BCIP Venture Associates","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113517,"kind":"organization","name":"BCIP VENTURE ASSOCIATES-B","position":5,"cik":"0001408676","reported_name":"BCIP VENTURE ASSOCIATES-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":6,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":7,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-03-19T16:37:06.000Z","date":"2018-03-16","kind":"sale","acquired":false,"shares":1000000,"price":25.79,"value":25790000.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2007, L.P. (\"Partners 2007\"), which is the general partner of Bain Capital Venture Fund 2007, L.P. (\"Fund 2007\"). As a result, Partners 2007 may be deemed to share voting and dispositive power with respect to shares of Common Stock held by Fund 2007. Partners 2007 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. On March 16, 2018, Fund 2007 sold 874,122 shares of Common Stock. Following such sale Fund 2007 held 3,219,142 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"On March 16, 2018, BCIP Venture Associates (\"BCIP VA\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), sold 124,324 shares of Common Stock. Following such sale BCIP VA held 457,848 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"On March 16, 2018, BCIP Venture Associates-B (\"BCIP VA-B\" and together with Fund 2007, and BCIP VA, the \"Bain Capital Entities\"), whose managing partner is Boylston, sold 1,554 shares of Common Stock. Following such sale BCIP VA-B held 5,723 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to all of the shares of Common Stock held by the Bain Capital Entities. Each of BCVI and Messrs. Krupka and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein."}],"balance_after":3682713,"source":{"system":"sec-edgar","filing":"0000899243-18-007952","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924318007952/doc4.xml","form_type":"4"}},{"id":4083405,"issuer":{"id":1196,"kind":"organization","name":"Rapid7, Inc.","symbol":"RPD"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106566,"kind":"organization","name":"Bain Capital Venture Partners 2007, L.P.","position":2,"cik":"0001408678","reported_name":"Bain Capital Venture Partners 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106567,"kind":"organization","name":"Bain Capital Venture Fund 2007, L.P.","position":3,"cik":"0001408677","reported_name":"Bain Capital Venture Fund 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105409,"kind":"organization","name":"BCIP Venture Associates","position":4,"cik":"0001408649","reported_name":"BCIP Venture Associates","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113517,"kind":"organization","name":"BCIP VENTURE ASSOCIATES-B","position":5,"cik":"0001408676","reported_name":"BCIP VENTURE ASSOCIATES-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":6,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":7,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-01-31T16:28:23.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":2000000,"price":21.01,"value":42020000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2007, L.P. (\"Partners 2007\"), which is the general partner of Bain Capital Venture Fund 2007, L.P. (\"Fund 2007\"). As a result, Partners 2007 may be deemed to share voting and dispositive power with respect to shares of Common Stock held by Fund 2007. Partners 2007 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. On January 30, 2018, Fund 2007 sold 1,748,245 shares of Common Stock. Following such sale Fund 2007 held 4,093,264 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"On January 30, 2018, BCIP Venture Associates (\"BCIP VA\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), sold 248,648 shares of Common Stock. Following such sale BCIP VA held 582,172 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"On January 30, 2018, BCIP Venture Associates-B (\"BCIP VA-B\" and together with Fund 2007, and BCIP VA, the \"Bain Capital Entities\"), whose managing partner is Boylston, sold 3,107 shares of Common Stock. Following such sale BCIP VA-B held 7,277 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to all of the shares of Common Stock held by the Bain Capital Entities. Each of BCVI and Messrs. Krupka and Agarwal disclaims beneficial ownership of such securities except to the extent of its or his pecuniary interest therein."}],"balance_after":4682713,"source":{"system":"sec-edgar","filing":"0000899243-18-002394","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924318002394/doc4.xml","form_type":"4"}},{"id":4136184,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Preferred Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":404632,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":125900},"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136183,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":349271,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":108670},"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136182,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":1517880,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":472271},"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136181,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Preferred Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":3326401,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1034971},"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136180,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Preferred Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":1267200,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Not applicable."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":394273},"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136179,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":125900,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":2136085,"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136178,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":108670,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":2010185,"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136177,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":472271,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":1901515,"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136176,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":1034971,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":1429244,"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4136175,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171238,"kind":"organization","name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","position":2,"cik":"0001309470","reported_name":"BAIN CAPITAL VENTURE PARTNERS 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":171239,"kind":"organization","name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","position":3,"cik":"0001309471","reported_name":"BAIN CAPITAL VENTURE FUND 2005, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145234,"kind":"organization","name":"BCIP Associates III, LLC","position":4,"cik":"0001379475","reported_name":"BCIP Associates III, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145235,"kind":"person","name":"BCIP Associates III","position":5,"cik":"0001379476","reported_name":"BCIP Associates III","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145236,"kind":"organization","name":"BCIP Associates III-B, LLC","position":6,"cik":"0001379517","reported_name":"BCIP Associates III-B, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145237,"kind":"person","name":"BCIP Associates III-B","position":7,"cik":"0001379519","reported_name":"BCIP Associates III-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":8,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":9,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-11T17:27:57.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":394273,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2005, L.P. (\"BCVP\"), which is the general partner of Bain Capital Venture Fund 2005, L.P. (\"Fund 2005\"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC (\"BCIP III\"), whose manager is BCIP Associates III (\"BCIPA III\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC (\"BCIP III-B\" and together with Fund 2005 and BCIP III, the \"Bain Capital Entities\"), whose manager is BCIP Associates III-B (\"BCIPA III-B\"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein."}],"balance_after":394273,"source":{"system":"sec-edgar","filing":"0000899243-17-028491","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317028491/doc4.xml","form_type":"4"}},{"id":4161953,"issuer":{"id":1196,"kind":"organization","name":"Rapid7, Inc.","symbol":"RPD"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106566,"kind":"organization","name":"Bain Capital Venture Partners 2007, L.P.","position":2,"cik":"0001408678","reported_name":"Bain Capital Venture Partners 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106567,"kind":"organization","name":"Bain Capital Venture Fund 2007, L.P.","position":3,"cik":"0001408677","reported_name":"Bain Capital Venture Fund 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105409,"kind":"organization","name":"BCIP Venture Associates","position":4,"cik":"0001408649","reported_name":"BCIP Venture Associates","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113517,"kind":"organization","name":"BCIP VENTURE ASSOCIATES-B","position":5,"cik":"0001408676","reported_name":"BCIP VENTURE ASSOCIATES-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":6,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":7,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-11-15T19:53:16.000Z","date":"2017-11-13","kind":"sale","acquired":false,"shares":898517,"price":18.3,"value":16442861.1,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2007, L.P. (\"Partners 2007\"), which is the general partner of Bain Capital Venture Fund 2007, L.P. (\"Fund 2007\"). As a result, Partners 2007 may be deemed to share voting and dispositive power with respect to shares of Common Stock held by Fund 2007. Partners 2007 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. On November 13, 2017, Fund 2007 sold 785,414 shares of Common Stock. Following such sale Fund 2007 held 5,841,509 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"On November 13, 2017, BCIP Venture Associates (\"BCIP VA\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), sold 111,707 shares of Common Stock. Following such sale BCIP VA held 830,820 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"On November 13, 2017, BCIP Venture Associates-B (\"BCIP VA-B\" and together with Fund 2007, and BCIP VA, the \"Bain Capital Entities\"), whose managing partner is Boylston, sold 1,396 shares of Common Stock. Following such sale BCIP VA-B held 10,384 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka, and Ajay Agarwal. As a result, BCVI may be deemed to share voting and dispositive power with respect to all of the shares of Common Stock held by the Bain Capital Entities. BCVI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":6682713,"source":{"system":"sec-edgar","filing":"0000899243-17-026435","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317026435/doc4.xml","form_type":"4"}},{"id":4289635,"issuer":{"id":1196,"kind":"organization","name":"Rapid7, Inc.","symbol":"RPD"},"owners":[{"id":97201,"kind":"organization","name":"BAIN CAPITAL VENTURE INVESTORS, LLC","position":1,"cik":"0001309469","reported_name":"BAIN CAPITAL VENTURE INVESTORS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106566,"kind":"organization","name":"Bain Capital Venture Partners 2007, L.P.","position":2,"cik":"0001408678","reported_name":"Bain Capital Venture Partners 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":106567,"kind":"organization","name":"Bain Capital Venture Fund 2007, L.P.","position":3,"cik":"0001408677","reported_name":"Bain Capital Venture Fund 2007, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105409,"kind":"organization","name":"BCIP Venture Associates","position":4,"cik":"0001408649","reported_name":"BCIP Venture Associates","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113517,"kind":"organization","name":"BCIP VENTURE ASSOCIATES-B","position":5,"cik":"0001408676","reported_name":"BCIP VENTURE ASSOCIATES-B","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168194,"kind":"person","name":"KRUPKA MICHAEL A","position":6,"cik":"0001212150","reported_name":"KRUPKA MICHAEL A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":113492,"kind":"person","name":"Agarwal Ajay","position":7,"cik":"0001708763","reported_name":"Agarwal Ajay","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-06-07T16:20:04.000Z","date":"2017-06-06","kind":"sale","acquired":false,"shares":1400000,"price":18,"value":25200000.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Bain Capital Venture Investors, LLC (\"BCVI\") is the general partner of Bain Capital Venture Partners 2007, L.P. (\"Partners 2007\"), which is the general partner of Bain Capital Venture Fund 2007, L.P. (\"Fund 2007\"). As a result, Partners 2007 may be deemed to share voting and dispositive power with respect to shares of Common Stock held by Fund 2007. Partners 2007 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. On June 6, 2017, Fund 2007 sold 1,223,772 shares of Common Stock. Following such sale Fund 2007 held 6,626,923 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"On June 6, 2017, BCIP Venture Associates (\"BCIP VA\"), whose managing partner is Boylston Coinvestors, LLC (\"Boylston\"), sold 174,053 shares of Common Stock. Following such sale BCIP VA held 942,527 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"On June 6, 2017, BCIP Venture Associates-B (\"BCIP VA-B\" and together with Fund 2007 and BCIP VA, the \"Bain Capital Entities\"), whose managing partner is Boylston, sold 2,175 shares of Common Stock. Following such sale BCIP VA-B held 11,780 shares of Common Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka and Ajay Agarwal. As a result, BCVI and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to all of the shares of Common Stock held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal each disclaim beneficial ownership of such securities except to the extent of its or his pecuniary interest therein."}],"balance_after":7581230,"source":{"system":"sec-edgar","filing":"0000899243-17-015648","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1212150/000089924317015648/doc4.xml","form_type":"4"}}]}