{"transactions":[{"id":914516,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-02-09T23:19:16.000Z","date":"2026-02-09","kind":"other","planned":false,"acquired":false,"shares":60,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"kind","element":"transactionCoding","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares are held directly by AVAO I LP. AVAO I LLC is the general partner of AVAO I LP. AVAO I LLC disclaims Section 16 beneficial ownership of the securities held by AVAO I LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001231919-26-000124","document":"form4-02092026_110208.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000123191926000124/form4-02092026_110208.xml","form_type":"4"}},{"id":914515,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-02-09T23:19:16.000Z","date":"2026-02-09","kind":"other","planned":false,"acquired":false,"shares":116693,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"kind","element":"transactionCoding","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held directly by Atlas Venture Opportunity Fund I, L.P. (\"Atlas Venture Opportunity Fund I\"). The general partner of Atlas Venture Opportunity Fund I is Atlas Venture Associates Opportunity I, LP (\"AVAO I LP\"). Atlas Venture Associates Opportunity I, LLC (\"AVAO I LLC\") is the general partner of AVAO I LP. Each of AVAO I LP and AVAO I LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Opportunity Fund I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001231919-26-000124","document":"form4-02092026_110208.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000123191926000124/form4-02092026_110208.xml","form_type":"4"}},{"id":914514,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-02-09T23:19:16.000Z","date":"2026-02-09","kind":"other","planned":false,"acquired":false,"shares":711193,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"kind","element":"transactionCoding","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger (the \"Merger Agreement\"), by and among Generation Bio. Co. (the \"Issuer\"), XOMA Royalty Corporation (\"Parent\") and Parent's wholly-owned subsidiary, XRA 7 Corp. (\"Merger Sub\"), dated as of December 15, 2025, the shares (the \"Shares\") of common stock, par value $0.0001 per share, of the Issuer (the \"Common Stock\") that were tendered to Merger Sub prior to the expiration time of the offer were exchanged for (i) a purchase price of $4.2913 per\nShare to the stockholders in cash, without interest and less any applicable tax withholding (the \"Cash Amount\"), plus (ii) one non-tradeable contingent value right per Share (the \"CVR\"),"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement entered into by Parent and the rights agent, with an estimated maximum contingent consideration amount of $25.01 per CVR (the Cash Amount plus one CVR, collectively, the \"Offer Price\"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Issuer,\neffective as of February 9, 2026 (the \"Effective Time\"), with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001231919-26-000124","document":"form4-02092026_110208.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000123191926000124/form4-02092026_110208.xml","form_type":"4"}},{"id":1578885,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T23:53:50.000Z","date":"2024-03-13","kind":"sale","planned":true,"acquired":false,"shares":1386,"price":42.84,"value":59376.24,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Opportunity Fund I, L.P. on January 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.6032 to $43.0839 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":828830,"source":{"system":"sec-edgar","filing":"0001415889-24-007894","document":"form4-03132024_110341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000141588924007894/form4-03132024_110341.xml","form_type":"4"}},{"id":1578884,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T23:53:50.000Z","date":"2024-03-13","kind":"sale","planned":true,"acquired":false,"shares":22779,"price":42.19,"value":961046.01,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Opportunity Fund I, L.P. on January 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.50 to $42.475 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":830216,"source":{"system":"sec-edgar","filing":"0001415889-24-007894","document":"form4-03132024_110341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000141588924007894/form4-03132024_110341.xml","form_type":"4"}},{"id":1578883,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T23:53:50.000Z","date":"2024-03-13","kind":"sale","planned":true,"acquired":false,"shares":6686,"price":42.84,"value":286428.24,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Fund X, L.P. on January 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.6032 to $43.0839 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":4676075,"source":{"system":"sec-edgar","filing":"0001415889-24-007894","document":"form4-03132024_110341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000141588924007894/form4-03132024_110341.xml","form_type":"4"}},{"id":1578882,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T23:53:50.000Z","date":"2024-03-13","kind":"sale","planned":true,"acquired":false,"shares":108404,"price":42.19,"value":4573564.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Fund X, L.P. on January 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.50 to $42.475 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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These shares were sold in multiple transactions at prices ranging from $41.445 to $42.43 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $42.46 to $42.90 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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These shares were sold in multiple transactions at prices ranging from $41.445 to $42.43 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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These shares were sold in multiple transactions at prices ranging from $43.185 to $44.03 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":881266,"source":{"system":"sec-edgar","filing":"0001415889-24-007894","document":"form4-03132024_110341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000141588924007894/form4-03132024_110341.xml","form_type":"4"}},{"id":1578876,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T23:53:50.000Z","date":"2024-03-11","kind":"sale","planned":true,"acquired":false,"shares":7837,"price":42.77,"value":335188.49,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Opportunity Fund I, L.P. on January 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.1826 to $43.18 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each\nseparate price within the ranges set forth in footnotes (2), (4), (7), (8), (9) and (10)."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $43.185 to $44.03 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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These shares were sold in multiple transactions at prices ranging from $29.95 to $29.99 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (5)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":5045242,"source":{"system":"sec-edgar","filing":"0001209191-23-003293","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919123003293/doc4.xml","form_type":"4"}},{"id":2072813,"issuer":{"id":2273,"kind":"organization","name":"Disc Medicine, Inc.","symbol":"IRON"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-01-04T02:28:34.000Z","date":"2022-12-29","kind":"other","acquired":true,"shares":882224,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Gemini Therapeutics, Inc. (\" Gemini\"), and Disc Medicine Opco, Inc. (f/k/a Disc Medicine, Inc.) (\"Disc\"), entered into an Agreement and Plan of Merger and Reorganization (the \"Merger Agreement\"), on August 9, 2022, pursuant to which, among other matters, a direct, wholly owned subsidiary of Gemini, Gemstone Merger Sub, Inc. (\"Merger Sub\"), merged with and into Disc, with Disc surviving as a wholly owned subsidiary of Gemini, and the surviving corporation of the merger, which transaction is referred to herein as the merger. The merger closed on on December 29, 2022. Following the effectiveness of the merger on December 29, 2022, the surviving corporation changed its name from Gemini to Disc Medicine, Inc. (the \"Issuer\")."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Gemini Therapeutics, Inc. (\" Gemini\"), and Disc Medicine Opco, Inc. (f/k/a Disc Medicine, Inc.) (\"Disc\"), entered into an Agreement and Plan of Merger and Reorganization (the \"Merger Agreement\"), on August 9, 2022, pursuant to which, among other matters, a direct, wholly owned subsidiary of Gemini, Gemstone Merger Sub, Inc. (\"Merger Sub\"), merged with and into Disc, with Disc surviving as a wholly owned subsidiary of Gemini, and the surviving corporation of the merger, which transaction is referred to herein as the merger. The merger closed on on December 29, 2022. Following the effectiveness of the merger on December 29, 2022, the surviving corporation changed its name from Gemini to Disc Medicine, Inc. (the \"Issuer\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(Continued from footnote 1) Upon the closing of the merger, each share of Disc common stock (after giving effect to the conversion of each share of Disc's preferred stock into Disc common stock and including all such shares that are converted into Disc common stock) was converted into the right to receive a number of shares of Gemini common stock equal to an exchange ratio of 0.1096."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"These shares are held directly by Atlas Venture Opportunity Fund I, L.P. (\"Atlas Opportunity I\"). Atlas Venture Associates Opportunity I, L.P. (\"Associates I\") is the general partner of Atlas Opportunity I. Atlas Venture Associates Opportunity I, LLC (\"Associates I LLC\") is the general partner of Associates I. Each of Associates I and Associates I LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Opportunity I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":955156,"source":{"system":"sec-edgar","filing":"0000899243-23-000461","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816736/000089924323000461/doc4.xml","form_type":"4"}},{"id":2072812,"issuer":{"id":2273,"kind":"organization","name":"Disc Medicine, Inc.","symbol":"IRON"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-01-04T02:28:34.000Z","date":"2022-12-29","kind":"other","acquired":true,"shares":1835799,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Gemini Therapeutics, Inc. (\" Gemini\"), and Disc Medicine Opco, Inc. (f/k/a Disc Medicine, Inc.) (\"Disc\"), entered into an Agreement and Plan of Merger and Reorganization (the \"Merger Agreement\"), on August 9, 2022, pursuant to which, among other matters, a direct, wholly owned subsidiary of Gemini, Gemstone Merger Sub, Inc. (\"Merger Sub\"), merged with and into Disc, with Disc surviving as a wholly owned subsidiary of Gemini, and the surviving corporation of the merger, which transaction is referred to herein as the merger. The merger closed on on December 29, 2022. Following the effectiveness of the merger on December 29, 2022, the surviving corporation changed its name from Gemini to Disc Medicine, Inc. (the \"Issuer\")."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Gemini Therapeutics, Inc. (\" Gemini\"), and Disc Medicine Opco, Inc. (f/k/a Disc Medicine, Inc.) (\"Disc\"), entered into an Agreement and Plan of Merger and Reorganization (the \"Merger Agreement\"), on August 9, 2022, pursuant to which, among other matters, a direct, wholly owned subsidiary of Gemini, Gemstone Merger Sub, Inc. (\"Merger Sub\"), merged with and into Disc, with Disc surviving as a wholly owned subsidiary of Gemini, and the surviving corporation of the merger, which transaction is referred to herein as the merger. The merger closed on on December 29, 2022. Following the effectiveness of the merger on December 29, 2022, the surviving corporation changed its name from Gemini to Disc Medicine, Inc. (the \"Issuer\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(Continued from footnote 1) Upon the closing of the merger, each share of Disc common stock (after giving effect to the conversion of each share of Disc's preferred stock into Disc common stock and including all such shares that are converted into Disc common stock) was converted into the right to receive a number of shares of Gemini common stock equal to an exchange ratio of 0.1096."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas X\"). Atlas Venture Associates X, L.P. (\"Associates X\") is the general partner of Atlas X. Atlas Venture Associates X, LLC (\"Associates X LLC\") is the general partner of Associates X. Each of Associates X and Associates X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":2237303,"source":{"system":"sec-edgar","filing":"0000899243-23-000461","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816736/000089924323000461/doc4.xml","form_type":"4"}},{"id":2083834,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-12-16T22:03:42.000Z","date":"2022-12-15","kind":"sale","acquired":false,"shares":717,"price":30,"value":21510.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.95 to $30.20 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":917811,"source":{"system":"sec-edgar","filing":"0001209191-22-061706","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122061706/doc4.xml","form_type":"4"}},{"id":2083833,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-12-16T22:03:42.000Z","date":"2022-12-15","kind":"sale","acquired":false,"shares":2561,"price":30,"value":76830.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.95 to $30.20 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":5066925,"source":{"system":"sec-edgar","filing":"0001209191-22-061706","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122061706/doc4.xml","form_type":"4"}},{"id":2083832,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-12-16T22:03:42.000Z","date":"2022-12-14","kind":"sale","acquired":false,"shares":3733,"price":34.02,"value":126996.66,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.95 to $34.20 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":918528,"source":{"system":"sec-edgar","filing":"0001209191-22-061706","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122061706/doc4.xml","form_type":"4"}},{"id":2083831,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-12-16T22:03:42.000Z","date":"2022-12-14","kind":"sale","acquired":false,"shares":3919,"price":33.34,"value":130659.46,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.95 to $33.89 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $31.95 to $32.94 inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $29.95 to $30.94 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (4), (5), (6), (7) and (9)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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These shares were sold in multiple transactions at prices ranging from $30.00 to $30.10 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $30.00 to $30.10 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":5365563,"source":{"system":"sec-edgar","filing":"0001209191-22-055808","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122055808/doc4.xml","form_type":"4"}},{"id":2124536,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-11-04T20:30:49.000Z","date":"2022-11-02","kind":"sale","acquired":false,"shares":27038,"price":30.02,"value":811680.76,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.95 to $30.61 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. Each of AVAO LP and AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any."}],"balance_after":1022502,"source":{"system":"sec-edgar","filing":"0001209191-22-055808","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122055808/doc4.xml","form_type":"4"}},{"id":2124535,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-11-04T20:30:49.000Z","date":"2022-11-02","kind":"sale","acquired":false,"shares":96581,"price":30.02,"value":2899361.62,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.95 to $30.61 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":5440875,"source":{"system":"sec-edgar","filing":"0001209191-22-055808","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122055808/doc4.xml","form_type":"4"}},{"id":2128533,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-11-01T23:34:32.000Z","date":"2022-11-01","kind":"sale","acquired":false,"shares":1044,"price":31.08,"value":32447.52,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.95 to $31.47 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $30.95 to $31.47 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any."}],"balance_after":5537456,"source":{"system":"sec-edgar","filing":"0001209191-22-055142","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919122055142/doc4.xml","form_type":"4"}},{"id":2128531,"issuer":{"id":3545,"kind":"organization","name":"Kymera Therapeutics, Inc.","symbol":"KYMR"},"owners":[{"id":67257,"kind":"organization","name":"Atlas Venture Fund X, L.P.","position":1,"cik":"0001628098","reported_name":"Atlas Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":2,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":3,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":4,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":5,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":6,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-11-01T23:34:32.000Z","date":"2022-11-01","kind":"sale","acquired":false,"shares":15804,"price":30.57,"value":483128.28,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.95 to $30.94 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are owned directly by Atlas Venture Opportunity Fund I, L.P. (\"AVOF I\"). Atlas Venture Associates Opportunity I, L.P. (\"AVAO LP\") is the general partner of AVOF I. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. 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These shares were sold in multiple transactions at prices ranging from $29.95 to $30.94 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are held directly by Atlas Venture Fund X, L.P. (\"Atlas Venture Fund X\"). The general partner of Atlas Venture Fund X is Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. 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AVA X LLC disclaims Section 16 beneficial ownership of the securities held by AVA X LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-21-051015","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1815442/000120919121051015/doc4.xml","form_type":"4"}},{"id":2653635,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":3,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-28T20:56:16.000Z","date":"2021-06-24","kind":"sale","acquired":false,"shares":8,"price":26.39,"value":211.12,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. 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AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVAO LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":608,"source":{"system":"sec-edgar","filing":"0001209191-21-043499","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000120919121043499/doc4.xml","form_type":"4"}},{"id":2653634,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":3,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-28T20:56:16.000Z","date":"2021-06-24","kind":"sale","acquired":false,"shares":50,"price":25.77,"value":1288.5,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.23 to $26.21 inclusive. The Reporting Persons undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (4)."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares are held directly by Atlas Venture Associates Opportunity I, LP (\"AVAO LP\"). Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVAO LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":616,"source":{"system":"sec-edgar","filing":"0001209191-21-043499","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000120919121043499/doc4.xml","form_type":"4"}},{"id":2653633,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":3,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-28T20:56:16.000Z","date":"2021-06-24","kind":"sale","acquired":false,"shares":4092,"price":26.39,"value":107987.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.23 to $26.58 inclusive."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The shares are held directly by Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. AVA X LLC disclaims Section 16 beneficial ownership of the securities held by AVA X LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-21-043499","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000120919121043499/doc4.xml","form_type":"4"}},{"id":2653632,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67260,"kind":"organization","name":"Atlas Venture Opportunity Fund I, L.P.","position":3,"cik":"0001759241","reported_name":"Atlas Venture Opportunity Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-28T20:56:16.000Z","date":"2021-06-24","kind":"sale","acquired":false,"shares":26858,"price":25.77,"value":692130.66,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.23 to $26.21 inclusive. The Reporting Persons undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (4)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The shares are held directly by Atlas Venture Associates X, L.P. (\"AVA X LP\"). Atlas Venture Associates X, LLC (\"AVA X LLC\") is the general partner of AVA X LP. AVA X LLC disclaims Section 16 beneficial ownership of the securities held by AVA X LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":4092,"source":{"system":"sec-edgar","filing":"0001209191-21-043499","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1759241/000120919121043499/doc4.xml","form_type":"4"}},{"id":2656706,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":3,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-24T00:26:27.000Z","date":"2021-06-23","kind":"sale","acquired":false,"shares":53,"price":25.69,"value":1361.57,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20 ,2021."},{"field":"shares","element":"transactionShares","label":"F6","text":"The shares reported herein give effect to the pro rata distribution of shares by Atlas Venture Opportunity Fund I, L.P. for no additional consideration to its limited partners and its and general partner, Atlas Venture Associates Opportunity I, LP (\"AVAO LP\"), subsequent to the Reporting Persons' last Section 16 filing reporting ownership of the Issuer's Common Stock. As the distribution of such shares constituted only a change in the form of the Reporting Persons' ownership in such shares, the Reporting Persons were not required to report the distribution pursuant to Section 16."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.63 to $25.95 inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The shares reported herein give effect to the pro rata distribution of shares by Atlas Venture Opportunity Fund I, L.P. for no additional consideration to its limited partners and its and general partner, Atlas Venture Associates Opportunity I, LP (\"AVAO LP\"), subsequent to the Reporting Persons' last Section 16 filing reporting ownership of the Issuer's Common Stock. As the distribution of such shares constituted only a change in the form of the Reporting Persons' ownership in such shares, the Reporting Persons were not required to report the distribution pursuant to Section 16."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The shares are held directly by AVAO LP. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVAO LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":666,"source":{"system":"sec-edgar","filing":"0001209191-21-042857","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1733294/000120919121042857/doc4.xml","form_type":"4"}},{"id":2656705,"issuer":{"id":67174,"kind":"organization","name":"Generation Bio Co.","symbol":"GBIO"},"owners":[{"id":67258,"kind":"organization","name":"ATLAS VENTURE ASSOCIATES X, L.P.","position":1,"cik":"0001742766","reported_name":"ATLAS VENTURE ASSOCIATES X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67259,"kind":"organization","name":"Atlas Venture Associates X, LLC","position":2,"cik":"0001742765","reported_name":"Atlas Venture Associates X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67261,"kind":"organization","name":"Atlas Venture Associates Opportunity I, L.P.","position":3,"cik":"0001780065","reported_name":"Atlas Venture Associates Opportunity I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":67262,"kind":"organization","name":"Atlas Venture Associates Opportunity I, LLC","position":4,"cik":"0001780066","reported_name":"Atlas Venture Associates Opportunity I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-06-24T00:26:27.000Z","date":"2021-06-23","kind":"sale","acquired":false,"shares":63,"price":25.08,"value":1580.04,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 trading plan dated April 20 ,2021."},{"field":"shares","element":"transactionShares","label":"F6","text":"The shares reported herein give effect to the pro rata distribution of shares by Atlas Venture Opportunity Fund I, L.P. for no additional consideration to its limited partners and its and general partner, Atlas Venture Associates Opportunity I, LP (\"AVAO LP\"), subsequent to the Reporting Persons' last Section 16 filing reporting ownership of the Issuer's Common Stock. As the distribution of such shares constituted only a change in the form of the Reporting Persons' ownership in such shares, the Reporting Persons were not required to report the distribution pursuant to Section 16."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.63 to $25.62 inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The shares reported herein give effect to the pro rata distribution of shares by Atlas Venture Opportunity Fund I, L.P. for no additional consideration to its limited partners and its and general partner, Atlas Venture Associates Opportunity I, LP (\"AVAO LP\"), subsequent to the Reporting Persons' last Section 16 filing reporting ownership of the Issuer's Common Stock. As the distribution of such shares constituted only a change in the form of the Reporting Persons' ownership in such shares, the Reporting Persons were not required to report the distribution pursuant to Section 16."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The shares are held directly by AVAO LP. Atlas Venture Associates Opportunity I, LLC (\"AVAO LLC\") is the general partner of AVAO LP. AVAO LLC disclaims Section 16 beneficial ownership of the securities held by AVAO LP except to the extent of its pecuniary interest therein, if any."}],"balance_after":719,"source":{"system":"sec-edgar","filing":"0001209191-21-042857","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1733294/000120919121042857/doc4.xml","form_type":"4"}}],"next_cursor":"2021-06-24T00:26:27.000000Z,2656705"}