Joshua T. Brumm - Dec 8, 2025 Form 4 Insider Report for CRESCENT BIOPHARMA, INC. (CBIO)

Role
Chief Executive Officer, Director
Signature
/s/ Barbara Bispham, as attorney-in-fact for Joshua T. Brumm
Stock symbol
CBIO
Transactions as of
Dec 8, 2025
Transactions value $
$0
Form type
4
Date filed
12/10/2025, 04:35 PM
Previous filing
Jun 23, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Brumm Joshua T Chief Executive Officer, Director C/O CRESCENT BIOPHARMA, INC., 300 FIFTH AVENUE, WALTHAM /s/ Barbara Bispham, as attorney-in-fact for Joshua T. Brumm 2025-12-10 0001528826

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CBIO Stock Option (Right to Buy) Award $0 +346K $0.00 346K Dec 8, 2025 Ordinary Shares 346K $13.17 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 This option represents a right to purchase shares of the Issuer's ordinary shares and vests in 48 approximately equal monthly installments that commenced on December 8, 2025.