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The Adviser, the Adviser GP, the Fund, the Nexus Fund II, the Nexus Fund IV, Dr. Kolchinsky and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Held directly by Nexus Fund II."}],"balance_after":1009052,"source":{"system":"sec-edgar","filing":"0001231919-26-000457","document":"form4-05062026_110527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1315082/000123191926000457/form4-05062026_110527.xml","form_type":"4"}},{"id":789607,"issuer":{"id":4476,"kind":"organization","name":"Hemab Therapeutics Holdings, Inc.","symbol":"COAG"},"owners":[{"id":19524,"kind":"organization","name":"RA CAPITAL MANAGEMENT, L.P.","position":1,"cik":"0001346824","reported_name":"RA CAPITAL MANAGEMENT, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":19525,"kind":"organization","name":"RA Capital Healthcare Fund LP","position":2,"cik":"0001315082","reported_name":"RA Capital Healthcare Fund LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":29189,"kind":"person","name":"RA Capital Nexus Fund II, L.P.","position":3,"cik":"0001825376","reported_name":"RA Capital Nexus Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}},{"id":49347,"kind":"person","name":"RA Capital Nexus Fund IV, L.P.","position":4,"cik":"0002053586","reported_name":"RA Capital Nexus Fund IV, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}},{"id":19526,"kind":"person","name":"Kolchinsky Peter","position":5,"cik":"0001384859","reported_name":"Kolchinsky Peter","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":19527,"kind":"person","name":"Shah Rajeev M.","position":6,"cik":"0001619841","reported_name":"Shah Rajeev M.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-06T23:16:36.000Z","date":"2026-05-04","kind":"exercise","planned":false,"acquired":true,"shares":3607846,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock automatically converted into shares of Common Stock immediately prior to the closing of the Issuer's initial public offering for no additional consideration, on a 22-for-1 basis, and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"RA Capital Management, L.P. 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The Adviser, the Adviser GP, the Fund, the Nexus Fund II, the Nexus Fund IV, Dr. Kolchinsky and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held directly by the Fund."}],"balance_after":3607846,"source":{"system":"sec-edgar","filing":"0001231919-26-000457","document":"form4-05062026_110527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1315082/000123191926000457/form4-05062026_110527.xml","form_type":"4"}}]}