{"transactions":[{"id":4622742,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Ordinary Shares","published_at":"2026-09-18T20:03:19.000Z","date":"2026-09-16","kind":"sale","planned":true,"acquired":false,"shares":658,"price":17.9,"value":11778.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the settlement of restricted stock units granted to the Reporting Person on December 15, 2025. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the Reporting Person on February 26, 2026, solely with the intent to cover taxes in connection with the vesting of the restricted stock units."},{"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 $17.10 to $19.17, 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 at which the transactions were effected."}],"balance_after":21581,"source":{"system":"sec-edgar","filing":"0001628280-26-062707","document":"wk-form4_1789761795.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000162828026062707/wk-form4_1789761795.xml","form_type":"4"}},{"id":729427,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Ordinary Shares","published_at":"2026-06-23T20:04:25.000Z","date":"2026-06-22","kind":"sale","planned":true,"acquired":false,"shares":1288,"price":17.99,"value":23171.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the settlement of restricted stock units granted to the Reporting Person on December 15, 2025. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the Reporting Person on February 26, 2026, solely with the intent to cover taxes in connection with the vesting of the restricted stock units."},{"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 $16.88 to $18.86, 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 at which the transactions were effected."}],"balance_after":22239,"source":{"system":"sec-edgar","filing":"0001628280-26-044892","document":"wk-form4_1782245062.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000162828026044892/wk-form4_1782245062.xml","form_type":"4"}},{"id":965550,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-17T21:49:10.000Z","date":"2025-12-15","kind":"grant","planned":false,"acquired":true,"shares":70025,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This Option represents a right to purchase shares of the Issuer's Ordinary Shares and vests with respect to 1/48th of the Option on each monthly anniversary of December 15, 2025, subject to the Reporting Person remaining continuously employed by or providing services to the Issuer or its subsidiaries from December 15, 2025 through each such vesting date."}],"balance_after":70025,"derivative":{"exercise_price":13.21,"expiration_date":"2035-12-15","underlying":"Ordinary Shares","underlying_shares":70025},"source":{"system":"sec-edgar","filing":"0001628280-25-057687","document":"wk-form4_1766008146.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000162828025057687/wk-form4_1766008146.xml","form_type":"4"}},{"id":965549,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Ordinary Shares","published_at":"2025-12-17T21:49:10.000Z","date":"2025-12-15","kind":"grant","planned":false,"acquired":true,"shares":5000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents an award of Restricted Stock Units (\"RSUs\"). Each RSU represents a contingent right to receive one share of the Issuer's Ordinary Shares. The RSUs shall vest in approximately equal three-month installments through the four-year anniversary of December 15, 2025,  subject to the Reporting Person remaining continuously employed by or providing services to the Issuer or its subsidiaries from December 15, 2025 through each such vesting date."}],"balance_after":22507,"source":{"system":"sec-edgar","filing":"0001628280-25-057687","document":"wk-form4_1766008146.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000162828025057687/wk-form4_1766008146.xml","form_type":"4"}},{"id":965548,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Ordinary Shares","published_at":"2025-12-17T21:49:10.000Z","date":"2025-12-15","kind":"grant","planned":false,"acquired":true,"shares":17507,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents an award of Restricted Stock Units (\"RSUs\"). Each RSU represents a contingent right to receive one share of the Issuer's Ordinary Shares. The RSUs shall vest in approximately equal three-month installments through the four-year anniversary of December 15, 2025,  subject to the Reporting Person remaining continuously employed by or providing services to the Issuer or its subsidiaries from December 15, 2025 through each such vesting date."}],"balance_after":17507,"source":{"system":"sec-edgar","filing":"0001628280-25-057687","document":"wk-form4_1766008146.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000162828025057687/wk-form4_1766008146.xml","form_type":"4"}},{"id":1086775,"issuer":{"id":5255,"kind":"organization","name":"CRESCENT BIOPHARMA, INC.","symbol":"CBIO"},"owners":[{"id":36066,"kind":"person","name":"Pinkas Jan","position":1,"cik":"0002077126","reported_name":"Pinkas Jan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-07-16T23:11:26.000Z","date":"2025-07-16","kind":"grant","planned":false,"acquired":true,"shares":142474,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option will vest as to 25% on July 7, 2026 and in equal monthly installments thereafter through July 7, 2029, subject to the Reporting Person's continued service to the Issuer on each such vesting date."}],"balance_after":142474,"derivative":{"exercise_price":13.14,"expiration_date":"2035-07-16","underlying":"Ordinary Shares","underlying_shares":142474},"source":{"system":"sec-edgar","filing":"0001104659-25-068426","document":"tm2521104-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2077126/000110465925068426/tm2521104-1_4seq1.xml","form_type":"4"}}]}