{"transactions":[{"id":1254266,"issuer":{"id":4915,"kind":"organization","name":"Solid Biosciences Inc.","symbol":"SLDB"},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82943,"kind":"organization","name":"BCLS SB Investco, LP","position":2,"cik":"0001728056","reported_name":"BCLS SB Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44734,"kind":"organization","name":"Bain Capital Life Sciences Partners, LP","position":3,"cik":"0001703030","reported_name":"Bain Capital Life Sciences Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":4,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":5,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":6,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":7,"cik":"0001819101","reported_name":"BCLS II Investco (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":8,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82948,"kind":"organization","name":"BCLS II Equity Opportunities, LP","position":9,"cik":"0001814474","reported_name":"BCLS II Equity Opportunities, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82949,"kind":"organization","name":"BCLS II Equity Opportunities GP, LLC","position":10,"cik":"0002008174","reported_name":"BCLS II Equity Opportunities GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrant (right to buy)","published_at":"2025-02-21T22:48:02.000Z","date":"2025-02-19","kind":"purchase","planned":false,"acquired":true,"shares":6444170,"price":4.029,"value":25963560.93,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 19, 2025, BCLS II Investco, LP (\"BCLS II Investco\") purchased 1,000,000 shares of the Issuer's common stock and a pre-funded warrant to purchase 6,444,170 shares of the Issuer's common stock at a purchase price of $4.03 and $4.029, respectively, in an underwritten public offering (the \"February 2025 Underwritten Offering\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The pre-funded warrant cannot be exercised if, as a result of such exercise, the holder, together with its affiliates and any other persons whose beneficial ownership would be aggregated with the holder for purposes of Section 13(d) of the Act, would beneficially own more than 9.99% of the total number of shares of the Issuer's common stock then outstanding immediately following such exercise."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The pre-funded warrant does not expire."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"The pre-funded warrant cannot be exercised if, as a result of such exercise, the holder, together with its affiliates and any other persons whose beneficial ownership would be aggregated with the holder for purposes of Section 13(d) of the Act, would beneficially own more than 9.99% of the total number of shares of the Issuer's common stock then outstanding immediately following such exercise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents a pre-funded warrant to purchase 6,444,170 shares of the Issuer's common stock held directly by BCLS II Investco, after giving effect to the closing of the February 2025 Underwritten Offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose managing member is BCLS Fund II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS Fund II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS Fund II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") (i) is the general partner of BCLSP, (ii) is the manager of BCLSI II and (iii) governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":6444170,"derivative":{"exercise_price":0.001,"exercise_date":"2025-02-19","underlying":"Common Stock","underlying_shares":6444170},"source":{"system":"sec-edgar","filing":"0000950170-25-025011","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000095017025025011/ownership.xml","form_type":"4"}},{"id":1254265,"issuer":{"id":4915,"kind":"organization","name":"Solid Biosciences Inc.","symbol":"SLDB"},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82943,"kind":"organization","name":"BCLS SB Investco, LP","position":2,"cik":"0001728056","reported_name":"BCLS SB Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44734,"kind":"organization","name":"Bain Capital Life Sciences Partners, LP","position":3,"cik":"0001703030","reported_name":"Bain Capital Life Sciences Partners, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":4,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":5,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":6,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":7,"cik":"0001819101","reported_name":"BCLS II Investco (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":8,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82948,"kind":"organization","name":"BCLS II Equity Opportunities, LP","position":9,"cik":"0001814474","reported_name":"BCLS II Equity Opportunities, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82949,"kind":"organization","name":"BCLS II Equity Opportunities GP, LLC","position":10,"cik":"0002008174","reported_name":"BCLS II Equity Opportunities GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-02-21T22:48:02.000Z","date":"2025-02-19","kind":"purchase","planned":false,"acquired":true,"shares":1000000,"price":4.03,"value":4030000.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 19, 2025, BCLS II Investco, LP (\"BCLS II Investco\") purchased 1,000,000 shares of the Issuer's common stock and a pre-funded warrant to purchase 6,444,170 shares of the Issuer's common stock at a purchase price of $4.03 and $4.029, respectively, in an underwritten public offering (the \"February 2025 Underwritten Offering\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents 528,660 shares of the Issuer's common stock held directly by BCLS SB Investco, LP (\"BCLS SB\"), 267,257 shares of the Issuer's common stock held directly by Bain Capital Life Sciences Fund II, L.P. (\"BCLS Fund II\"), 3,301,955 shares of the Issuer's common stock held directly by BCLS II Investco, 904,160 shares of the Issuer's common stock held directly by BCLS II Equity Opportunities, LP (\"BCLS II Equity\") and 32,550 shares of the Issuer's common stock held directly by BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS II Investco, BCLS SB, BCLS Fund II and BCLS II Equity, the \"Bain Capital Life Sciences Entities\"), after giving effect to the closing of the February 2025 Underwritten Offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Bain Capital Life Sciences Partners, LP (\"BCLSP\") is the general partner of BCLS SB. As a result, BCLSP may be deemed to share voting and dispositive power with respect to the securities held by BCLS SB. BCLSP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS Fund II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS Fund II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose managing member is BCLS Fund II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS Fund II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS Fund II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"BCLS II Equity Opportunities GP, LLC (\"BCLS II Equity GP\"), whose manager is BCLS Fund II, is the general partner of BCLS II Equity. As a result, each of BCLSI II, BCLS Fund II and BCLS II Equity GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Equity. Each of BCLSI II, BCLS Fund II and BCLS II Equity GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") (i) is the general partner of BCLSP, (ii) is the manager of BCLSI II and (iii) governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":5034582,"source":{"system":"sec-edgar","filing":"0000950170-25-025011","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000095017025025011/ownership.xml","form_type":"4"}},{"id":1329907,"issuer":{"id":1826,"kind":"organization","name":"NewAmsterdam Pharma Co N.V.","symbol":"NAMS"},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":50603,"kind":"organization","name":"BCLS Fund III Investments, LP","position":2,"cik":"0001952107","reported_name":"BCLS Fund III Investments, 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Associates, LP","position":10,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrant (right to buy)","published_at":"2024-12-17T22:05:48.000Z","date":"2024-12-13","kind":"purchase","planned":false,"acquired":true,"shares":1632653,"price":24.4999,"value":39999835.2347,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The pre-funded warrants cannot be exercised if, as a result of such exercise, the holder, together with its affiliates and any other persons whose beneficial ownership would be aggregated with the holder for purposes of Section 13(d) of the Act, would beneficially own more than 9.99% of the total number of Ordinary Shares then outstanding immediately following such exercise."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The pre-funded warrants do not expire."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"The pre-funded warrants cannot be exercised if, as a result of such exercise, the holder, together with its affiliates and any other persons whose beneficial ownership would be aggregated with the holder for purposes of Section 13(d) of the Act, would beneficially own more than 9.99% of the total number of Ordinary Shares then outstanding immediately following such exercise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Represents a pre-funded warrant to purchase 1,257,141 Ordinary Shares and a pre-funded warrant to purchase 375,512 Ordinary Shares, purchased by Bain Capital Life Sciences Opportunities III, LP (\"BCLS Fund III Opportunities\") and BCLS II Equity Opportunities, LP (\"BCLS Fund II Opportunities\"), respectively, in an underwritten public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Bain Capital Life Sciences III General Partner, LLC (\"BCLS III GP\") is the general partner of Bain Capital Life Sciences Fund III, L.P. (\"BCLS III\"), which is the sole member of Bain Capital Life Sciences Opportunities III GP, LLC (\"BCLS Fund III Opportunities GP\"), which is the general partner of BCLS Fund III Opportunities. As a result, each of BCLS III GP and BCLS III may be deemed to share voting and dispositive power with respect to the securities held by BCLS Fund III Opportunities. Each of BCLS III GP and BCLS III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of Bain Capital Life Sciences Fund II, L.P. (\"BCLS Fund II\"), which is the manager of BCLS II Equity Opportunities GP, LLC, which is the general partner of BCLS Fund II Opportunities. As a result, each of BCLSI II and BCLS Fund II may be deemed to share voting and dispositive power with respect to the securities held by BCLS Fund II Opportunities. Each of BCLSI II and BCLS Fund II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") is the manager of each of BCLS III GP and BCLSI II. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by each of BCLS Fund III Opportunities and BCLS Fund II Opportunities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":1632653,"derivative":{"exercise_price":0.0001,"exercise_date":"2024-12-13","underlying":"Ordinary Shares","underlying_shares":1632653},"source":{"system":"sec-edgar","filing":"0000950170-24-137335","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000095017024137335/ownership.xml","form_type":"4"}},{"id":1680374,"issuer":{"id":4915,"kind":"organization","name":"Solid Biosciences Inc.","symbol":"SLDB"},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82943,"kind":"organization","name":"BCLS SB Investco, LP","position":2,"cik":"0001728056","reported_name":"BCLS SB Investco, LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44734,"kind":"organization","name":"Bain Capital Life Sciences Partners, LP","position":3,"cik":"0001703030","reported_name":"Bain Capital Life Sciences Partners, LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":4,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":5,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":6,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":7,"cik":"0001819101","reported_name":"BCLS II Investco (GP), LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":8,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-01-12T22:09:35.000Z","date":"2024-01-11","kind":"grant","planned":false,"acquired":true,"shares":904160,"price":5.53,"value":5000004.8,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On January 8, 2024, BCLS II Equity Opportunities, LP (\"BCLS II Equity\") entered into a securities purchase agreement with the Issuer pursuant to which the Issuer agreed to issue and sell 904,160 shares of Common Stock to BCLS II Equity at a price of $5.53 per share (the \"January 2024 Private Placement\"). The January 2024 Private Placement closed on January 11, 2024. BCLS II Equity and BCLS II Equity Opportunities GP, LLC (\"BCLS II Equity GP\"), its general partner, plan to file a Form 3 with the Securities and Exchange Commission in connection with the acquisition of shares of Common Stock by BCLS II Equity in the January 2024 Private Placement."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents 528,660 shares of Common Stock held directly by BCLS SB Investco, LP (\"BCLS SB\"), 267,257 shares of Common Stock held directly by Bain Capital Life Sciences Fund II, L.P. (\"BCLS Fund II\"), 2,301,955 shares of Common Stock held directly by BCLS II Investco, LP (\"BCLS II Investco\"), 904,160 shares of Common Stock held directly by BCLS II Equity and 32,550 shares of Common Stock held directly by BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS SB, BCLS Fund II, BCLS II Investco and BCLS II Equity, the \"Bain Capital Life Sciences Entities\"), after giving effect to the closing of the January 2024 Private Placement."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Bain Capital Life Sciences Partners, LP (\"BCLSP\") is the general partner of BCLS SB. As a result, BCLSP may be deemed to share voting and dispositive power with respect to the securities held by BCLS SB. BCLSP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS Fund II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS Fund II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose managing member is BCLS Fund II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS Fund II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS Fund II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"BCLS Fund II is the manager of BCLS II Equity GP. As a result, each of BCLSI II and BCLS Fund II may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Equity. Each of BCLSI II and BCLS Fund II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") (i) is the general partner of BCLSP, (ii) is the manager of BCLSI II and (iii) governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":4034582,"source":{"system":"sec-edgar","filing":"0000950170-24-004289","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000095017024004289/ownership.xml","form_type":"4"}},{"id":2478136,"issuer":{"id":7122,"kind":"organization","name":"Xilio Therapeutics, Inc."},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":2,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":3,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":4,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":5,"cik":"0001819101","reported_name":"BCLS II Investo (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":6,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-12-11T01:33:42.000Z","date":"2021-12-10","kind":"purchase","acquired":true,"shares":3188,"price":10.2378,"value":32638.1064,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 8, 2021, December 9, 2021 and December 10, 2021, BCLS II Investco, LP (\"BCLS II Investco\") purchased 13,458, 4,011 and 25,000 shares of the Issuer's common stock, respectively."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $10.13 to $10.25, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares of the Issuer's common stock held by Bain Capital Life Sciences Fund II, L.P. (\"BCLS II\"), BCLS II Investco and BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS II and BCLS II Investco, the \"Bain Capital Life Sciences Entities\"). Following the completion of the transactions reported in footnote (1) to this Form 4, BCLS II, BCLS II Investco and BCIPLS each holds 1,348,682, 1,292,469 and 164,262 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose manager is BCLS II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") is the manager of BCLSI II and governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":2805413,"source":{"system":"sec-edgar","filing":"0000899243-21-047829","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000089924321047829/doc4.xml","form_type":"4"}},{"id":2478135,"issuer":{"id":7122,"kind":"organization","name":"Xilio Therapeutics, Inc."},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":2,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":3,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":4,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":5,"cik":"0001819101","reported_name":"BCLS II Investo (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":6,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-12-11T01:33:42.000Z","date":"2021-12-10","kind":"purchase","acquired":true,"shares":21812,"price":9.5619,"value":208564.1628,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 8, 2021, December 9, 2021 and December 10, 2021, BCLS II Investco, LP (\"BCLS II Investco\") purchased 13,458, 4,011 and 25,000 shares of the Issuer's common stock, respectively."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $9.07 to $10.00, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares of the Issuer's common stock held by Bain Capital Life Sciences Fund II, L.P. (\"BCLS II\"), BCLS II Investco and BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS II and BCLS II Investco, the \"Bain Capital Life Sciences Entities\"). Following the completion of the transactions reported in footnote (1) to this Form 4, BCLS II, BCLS II Investco and BCIPLS each holds 1,348,682, 1,292,469 and 164,262 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose manager is BCLS II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") is the manager of BCLSI II and governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":2802225,"source":{"system":"sec-edgar","filing":"0000899243-21-047829","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000089924321047829/doc4.xml","form_type":"4"}},{"id":2478134,"issuer":{"id":7122,"kind":"organization","name":"Xilio Therapeutics, Inc."},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":2,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":3,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":4,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":5,"cik":"0001819101","reported_name":"BCLS II Investo (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":6,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-12-11T01:33:42.000Z","date":"2021-12-09","kind":"purchase","acquired":true,"shares":4011,"price":9.8442,"value":39485.0862,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 8, 2021, December 9, 2021 and December 10, 2021, BCLS II Investco, LP (\"BCLS II Investco\") purchased 13,458, 4,011 and 25,000 shares of the Issuer's common stock, respectively."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $9.53 to $10.00, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares of the Issuer's common stock held by Bain Capital Life Sciences Fund II, L.P. (\"BCLS II\"), BCLS II Investco and BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS II and BCLS II Investco, the \"Bain Capital Life Sciences Entities\"). Following the completion of the transactions reported in footnote (1) to this Form 4, BCLS II, BCLS II Investco and BCIPLS each holds 1,348,682, 1,292,469 and 164,262 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose manager is BCLS II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") is the manager of BCLSI II and governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":2780413,"source":{"system":"sec-edgar","filing":"0000899243-21-047829","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000089924321047829/doc4.xml","form_type":"4"}},{"id":2478133,"issuer":{"id":7122,"kind":"organization","name":"Xilio Therapeutics, Inc."},"owners":[{"id":44733,"kind":"organization","name":"Bain Capital Life Sciences Investors, LLC","position":1,"cik":"0001703031","reported_name":"Bain Capital Life Sciences Investors, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82944,"kind":"organization","name":"Bain Capital Life Sciences Fund II, L.P.","position":2,"cik":"0001773187","reported_name":"Bain Capital Life Sciences Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82945,"kind":"organization","name":"Bain Capital Life Sciences Investors II, LLC","position":3,"cik":"0001796155","reported_name":"Bain Capital Life Sciences Investors II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82946,"kind":"organization","name":"BCLS II Investco, LP","position":4,"cik":"0001818893","reported_name":"BCLS II Investco, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":82947,"kind":"organization","name":"BCLS II Investco (GP), LLC","position":5,"cik":"0001819101","reported_name":"BCLS II Investo (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44736,"kind":"organization","name":"BCIP Life Sciences Associates, LP","position":6,"cik":"0001702921","reported_name":"BCIP Life Sciences Associates, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-12-11T01:33:42.000Z","date":"2021-12-08","kind":"purchase","acquired":true,"shares":13458,"price":9.6206,"value":129474.0348,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 8, 2021, December 9, 2021 and December 10, 2021, BCLS II Investco, LP (\"BCLS II Investco\") purchased 13,458, 4,011 and 25,000 shares of the Issuer's common stock, respectively."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $9.41 to $9.75, inclusive. The reporting persons undertake to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares of the Issuer's common stock held by Bain Capital Life Sciences Fund II, L.P. (\"BCLS II\"), BCLS II Investco and BCIP Life Sciences Associates, LP (\"BCIPLS\" and, together with BCLS II and BCLS II Investco, the \"Bain Capital Life Sciences Entities\"). Following the completion of the transactions reported in footnote (1) to this Form 4, BCLS II, BCLS II Investco and BCIPLS each holds 1,348,682, 1,292,469 and 164,262 shares of the Issuer's common stock, respectively."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Bain Capital Life Sciences Investors II, LLC (\"BCLSI II\") is the general partner of BCLS II. As a result, BCLSI II may be deemed to share voting and dispositive power with respect to the securities held by BCLS II. BCLSI II disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"BCLS II Investco (GP), LLC (\"BCLS II Investco GP\"), whose manager is BCLS II, is the general partner of BCLS II Investco. As a result, each of BCLSI II, BCLS II and BCLS II Investco GP may be deemed to share voting and dispositive power with respect to the securities held by BCLS II Investco. Each of BCLSI II, BCLS II and BCLS II Investco GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Boylston Coinvestors, LLC is the general partner of BCIPLS."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"Bain Capital Life Sciences Investors, LLC (\"BCLSI\") is the manager of BCLSI II and governs the investment strategy and decision-making process with respect to investments held by BCIPLS. As a result, BCLSI may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Life Sciences Entities. BCLSI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein."}],"balance_after":2776402,"source":{"system":"sec-edgar","filing":"0000899243-21-047829","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818893/000089924321047829/doc4.xml","form_type":"4"}}]}