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These shares were sold in multiple transactions at prices ranging from $51.00 to $51.10, 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 ranges set forth in this footnote (4)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6068391,"source":{"system":"sec-edgar","filing":"0001193125-26-352692","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000119312526352692/ownership.xml","form_type":"4"}},{"id":686974,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-08-14T21:44:00.000Z","date":"2026-08-12","kind":"sale","planned":true,"acquired":true,"shares":147059,"price":50.27,"value":7392655.93,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated March 26, 2026, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.05 to $50.81, 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 this footnote (2)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6068532,"source":{"system":"sec-edgar","filing":"0001193125-26-352692","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000119312526352692/ownership.xml","form_type":"4"}},{"id":760427,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-28T20:15:04.000Z","date":"2026-05-26","kind":"sale","planned":true,"acquired":false,"shares":18572,"price":40.047,"value":743752.884,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.10, 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 ranges set forth in this footnote (2)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6280525,"source":{"system":"sec-edgar","filing":"0001193125-26-245259","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000119312526245259/ownership.xml","form_type":"4"}},{"id":781032,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-13T23:06:16.000Z","date":"2026-05-11","kind":"sale","planned":true,"acquired":false,"shares":133618,"price":40.244,"value":5377322.792,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.665, 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 this footnote (2)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6299097,"source":{"system":"sec-edgar","filing":"0001193125-26-222185","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000119312526222185/ownership.xml","form_type":"4"}},{"id":785034,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-11T21:07:03.000Z","date":"2026-05-08","kind":"sale","planned":true,"acquired":false,"shares":5018,"price":40.306,"value":202255.508,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.10 to $40.80, 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 this footnote (4)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6432715,"source":{"system":"sec-edgar","filing":"0001193125-26-217092","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000119312526217092/ownership.xml","form_type":"4"}},{"id":785033,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-11T21:07:03.000Z","date":"2026-05-07","kind":"sale","planned":true,"acquired":false,"shares":271495,"price":40.121,"value":10892650.895,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.60, 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 this footnote (2)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6437733,"source":{"system":"sec-edgar","filing":"0001193125-26-217092","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000119312526217092/ownership.xml","form_type":"4"}},{"id":803818,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-04-21T23:36:04.000Z","date":"2026-04-17","kind":"sale","planned":true,"acquired":false,"shares":426005,"price":40.317,"value":17175243.585,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.79, 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 this footnote (2)."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"These shares are directly held by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."}],"balance_after":6709228,"source":{"system":"sec-edgar","filing":"0001193125-26-167636","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000119312526167636/ownership.xml","form_type":"4"}},{"id":1243403,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":1,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":2,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":3,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":4,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-02-26T21:15:08.000Z","date":"2025-02-24","kind":"purchase","planned":false,"acquired":true,"shares":18861,"price":5.999,"value":113147.139,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $5.975 to $6.00, 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 purchased at each separate price at which the transactions were effected."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":4211659,"source":{"system":"sec-edgar","filing":"0000950170-25-027754","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017025027754/ownership.xml","form_type":"4"}},{"id":1249734,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":1,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":2,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":3,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":4,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-02-24T21:15:07.000Z","date":"2025-02-21","kind":"purchase","planned":false,"acquired":true,"shares":427668,"price":5.94,"value":2540347.92,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $5.67 to $6.00, 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 purchased at each separate price at which the transactions were effected."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":4192798,"source":{"system":"sec-edgar","filing":"0000950170-25-025631","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017025025631/ownership.xml","form_type":"4"}},{"id":1249733,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":1,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":2,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":3,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":4,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-02-24T21:15:07.000Z","date":"2025-02-20","kind":"purchase","planned":false,"acquired":true,"shares":612674,"price":5.92,"value":3627030.08,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $5.39 to $6.00, 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 purchased at each separate price at which the transactions were effected."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":3765130,"source":{"system":"sec-edgar","filing":"0000950170-25-025631","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017025025631/ownership.xml","form_type":"4"}},{"id":1380707,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"exercise","planned":false,"acquired":false,"shares":24737017,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2872956},"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1380706,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"exercise","planned":false,"acquired":false,"shares":41250000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V, and TRV GP V LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":4790773},"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1380705,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"purchase","planned":false,"acquired":true,"shares":279500,"price":18,"value":5031000.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":3152456,"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1380704,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"purchase","planned":false,"acquired":true,"shares":370500,"price":18,"value":6669000.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V, and TRV GP V LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":6215591,"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1380703,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"exercise","planned":false,"acquired":true,"shares":2872956,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":2872956,"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1380702,"issuer":{"id":2452,"kind":"organization","name":"Septerna, Inc.","symbol":"SEPN"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-10-28T20:53:56.000Z","date":"2024-10-28","kind":"exercise","planned":false,"acquired":true,"shares":4790773,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a  one-for-8.6103 basis without payment of consideration. 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Each of TRV GP V, and TRV GP V LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":5845091,"source":{"system":"sec-edgar","filing":"0000950170-24-117772","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000095017024117772/ownership.xml","form_type":"4"}},{"id":1485279,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2024-06-10T23:42:10.000Z","date":"2024-06-10","kind":"exercise","planned":false,"acquired":false,"shares":298103,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Third Rock Ventures VI, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). 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The Preferred Stock had no expiration date."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held directly by Third Rock Ventures VI, L.P. (\"TRV VI\"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. (\"TRV GP VI\"). The general partner of TRV GP VI is TRV GP VI, LLC (\"TRV GP VI LLC\"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV III related parties and the TRV IV related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":934400},"source":{"system":"sec-edgar","filing":"0000950170-24-071537","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000095017024071537/ownership.xml","form_type":"4"}},{"id":1485277,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2024-06-10T23:42:10.000Z","date":"2024-06-10","kind":"exercise","planned":false,"acquired":false,"shares":56091177,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. The Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). Each of TRV GP V, and TRV GP V LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV III related parties and the TRV IV related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":6551449},"source":{"system":"sec-edgar","filing":"0000950170-24-071537","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2012593/000095017024071537/ownership.xml","form_type":"4"}},{"id":1485276,"issuer":{"id":4394,"kind":"organization","name":"Rapport Therapeutics, Inc.","symbol":"RAPP"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-06-10T23:42:10.000Z","date":"2024-06-10","kind":"exercise","planned":false,"acquired":true,"shares":969218,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Third Rock Ventures VI, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into Common Stock on a one-for-8.5648 basis without payment of consideration. 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The Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Third Rock Ventures V, L.P. (\"TRV V\"). The general partner of TRV V is Third Rock Ventures GP V, L.P. (\"TRV GP V\"). The general partner of TRV GP V is TRV GP V, LLC (\"TRV GP V LLC\"). 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Each of TRV GP VI and TRV GP VI LLC disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":473786},"source":{"system":"sec-edgar","filing":"0000899243-23-020350","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000089924323020350/doc4.xml","form_type":"4"}},{"id":1742376,"issuer":{"id":76319,"kind":"organization","name":"CARGO Therapeutics, Inc.","symbol":"CRGX"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Preferred Stock","published_at":"2023-11-15T00:08:54.000Z","date":"2023-11-14","kind":"exercise","planned":false,"acquired":false,"shares":23571429,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The Series A-1 Preferred Stock converted into Common Stock on a 13.5685-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-1 Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Series A-1 Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Series A-1 Preferred Stock converted into Common Stock on a 13.5685-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-1 Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Series A-1 Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Series A-1 Preferred Stock converted into Common Stock on a 13.5685-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. 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Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of these shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1737216},"source":{"system":"sec-edgar","filing":"0000899243-23-020350","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000089924323020350/doc4.xml","form_type":"4"}},{"id":1742375,"issuer":{"id":76319,"kind":"organization","name":"CARGO Therapeutics, Inc.","symbol":"CRGX"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-11-15T00:08:54.000Z","date":"2023-11-14","kind":"purchase","planned":false,"acquired":true,"shares":1333333,"price":15,"value":19999995.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"These shares are directly held by TRV VI."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The general partner of TRV VI is Third Rock Ventures GP VI, L.P. 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Each of TRV GP VI and TRV GP VI LLC disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":1807119,"source":{"system":"sec-edgar","filing":"0000899243-23-020350","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000089924323020350/doc4.xml","form_type":"4"}},{"id":1742374,"issuer":{"id":76319,"kind":"organization","name":"CARGO Therapeutics, Inc.","symbol":"CRGX"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-11-15T00:08:54.000Z","date":"2023-11-14","kind":"exercise","planned":false,"acquired":true,"shares":473786,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Represents the total number of shares of Common Stock received by Third Rock Ventures VI, L.P. 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Each of TRV GP VI and TRV GP VI LLC disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":473786,"source":{"system":"sec-edgar","filing":"0000899243-23-020350","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000089924323020350/doc4.xml","form_type":"4"}},{"id":1742373,"issuer":{"id":76319,"kind":"organization","name":"CARGO Therapeutics, Inc.","symbol":"CRGX"},"owners":[{"id":23357,"kind":"organization","name":"Third Rock Ventures V, L.P.","position":1,"cik":"0001778071","reported_name":"Third Rock Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23358,"kind":"organization","name":"Third Rock Ventures GP V, LP","position":2,"cik":"0001977498","reported_name":"Third Rock Ventures GP V, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23359,"kind":"organization","name":"TRV GP V, LLC","position":3,"cik":"0001990717","reported_name":"TRV GP V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23360,"kind":"organization","name":"Third Rock Ventures VI, L.P.","position":4,"cik":"0001931056","reported_name":"Third Rock Ventures VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23361,"kind":"organization","name":"Third Rock Ventures GP VI, L.P.","position":5,"cik":"0001977499","reported_name":"Third Rock Ventures GP VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23362,"kind":"organization","name":"TRV GP VI, LLC","position":6,"cik":"0001990716","reported_name":"TRV GP VI, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-11-15T00:08:54.000Z","date":"2023-11-14","kind":"exercise","planned":false,"acquired":true,"shares":1737216,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the total number of shares of Common Stock received by Third Rock Ventures V, L.P. 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Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of these shares except to the extent of its or his pecuniary interest therein, if any, and this report shall not be deemed an admission that it or he is the beneficial owner of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"Each of Reporting Persons disclaims the existence of a Section 13(d) \"group\" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties."}],"balance_after":1737216,"source":{"system":"sec-edgar","filing":"0000899243-23-020350","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1778071/000089924323020350/doc4.xml","form_type":"4"}}]}