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The Preferred Stock converted into Common Stock on a one-for-3.1060103 basis upon the closing of the Issuer's initial public offering without payment or additional consideration. The Preferred Stock had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A 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 Preferred Stock converted into Common Stock on a one-for-3.1060103 basis upon the closing of the Issuer's initial public offering without payment or additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A 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 Preferred Stock converted into Common Stock on a one-for-3.1060103 basis upon the closing of the Issuer's initial public offering without payment or additional consideration. The Preferred Stock had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A 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 Preferred Stock converted into Common Stock on a one-for-3.1060103 basis upon the closing of the Issuer's initial public offering without payment or additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Atlas Venture Fund XII, L.P. (\"Atlas Fund XII\"). The general partner of Atlas Fund XII is Atlas Venture Associates XII, L.P. (\"AVA XII LP\"). Atlas Venture Associates XII, LLC (\"AVA XII LLC\") is the general partner of AVA XII LP.  Each of AVA XII LP and AVA XII LLC disclaim Section 16 beneficial ownership of the securities owned by Atlas Fund XII, except to the extent of its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2568165},"source":{"system":"sec-edgar","filing":"0001104659-21-089434","document":"tm2121485-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1798749/000110465921089434/tm2121485-1_4seq1.xml","form_type":"4"}},{"id":2641471,"issuer":{"id":4757,"kind":"organization","name":"Jade Biosciences, Inc."},"owners":[{"id":76807,"kind":"organization","name":"Atlas Venture Fund XII, L.P.","position":1,"cik":"0001812049","reported_name":"Atlas Venture Fund XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":76808,"kind":"organization","name":"Atlas Venture Associates XII, L.P.","position":2,"cik":"0001845875","reported_name":"Atlas Venture Associates XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":76809,"kind":"organization","name":"Atlas Venture Associates XII, LLC","position":3,"cik":"0001845871","reported_name":"Atlas Venture Associates XII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-07-06T20:26:22.000Z","date":"2021-07-02","kind":"purchase","acquired":true,"shares":535714,"price":14,"value":7499996.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Atlas Venture Fund XII, L.P. (\"Atlas Fund XII\"). The general partner of Atlas Fund XII is Atlas Venture Associates XII, L.P. (\"AVA XII LP\"). Atlas Venture Associates XII, LLC (\"AVA XII LLC\") is the general partner of AVA XII LP.  Each of AVA XII LP and AVA XII LLC disclaim Section 16 beneficial ownership of the securities owned by Atlas Fund XII, except to the extent of its pecuniary interest therein, if any."}],"balance_after":3103879,"source":{"system":"sec-edgar","filing":"0001104659-21-089434","document":"tm2121485-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1798749/000110465921089434/tm2121485-1_4seq1.xml","form_type":"4"}},{"id":2641470,"issuer":{"id":4757,"kind":"organization","name":"Jade Biosciences, Inc."},"owners":[{"id":76807,"kind":"organization","name":"Atlas Venture Fund XII, L.P.","position":1,"cik":"0001812049","reported_name":"Atlas Venture Fund XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":76808,"kind":"organization","name":"Atlas Venture Associates XII, L.P.","position":2,"cik":"0001845875","reported_name":"Atlas Venture Associates XII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":76809,"kind":"organization","name":"Atlas Venture Associates XII, LLC","position":3,"cik":"0001845871","reported_name":"Atlas Venture Associates XII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-07-06T20:26:22.000Z","date":"2021-07-02","kind":"exercise","acquired":true,"shares":2568165,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A 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 Preferred Stock converted into Common Stock on a one-for-3.1060103 basis upon the closing of the Issuer's initial public offering without payment or additional consideration. The Preferred Stock had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares are held directly by Atlas Venture Fund XII, L.P. (\"Atlas Fund XII\"). The general partner of Atlas Fund XII is Atlas Venture Associates XII, L.P. (\"AVA XII LP\"). Atlas Venture Associates XII, LLC (\"AVA XII LLC\") is the general partner of AVA XII LP.  Each of AVA XII LP and AVA XII LLC disclaim Section 16 beneficial ownership of the securities owned by Atlas Fund XII, except to the extent of its pecuniary interest therein, if any."}],"balance_after":2568165,"source":{"system":"sec-edgar","filing":"0001104659-21-089434","document":"tm2121485-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1798749/000110465921089434/tm2121485-1_4seq1.xml","form_type":"4"}}]}