144 0002089237 XXXXXXXX LIVE 0001778016 NovaBridge Biosciences 001-39173 SUITE 400, 2440 RESEARCH BLVD ROCKVILLE MD 20850 (240) 745 6330 Dennis Phillip Andrew CHIEF MEDICAL OFFICER Common Stock Citigroup Global Markets, Inc.

390 Greenwich St. New York NY 10013

3431 14501.46 115270000 12/18/2025 NASDAQ Common Stock 12/17/2025 Restricted Stock Units Vesting NovaBridge Biosciences N 10302 12/18/2025 Compensation N Dennis Phillip Andrew

SUITE 400, 2440 RESEARCH BLVD Rockville MD 20850

Common Stock 10/01/2025 2986 11558.51 Shares to be sold were from the vesting of the restricted stock units to cover tax obligations. These came from the RSU 2024 incentive plan. 12/18/2025 CONFORMED SIGNATURE ON FILE