X0609 4 2026-09-17 0001778016 NovaBridge Biosciences NBP 0002089237 Dennis Phillip Andrew false C/O NOVABRIDGE BIOSCIENCES 2440 RESEARCH BOULEVARD, SUITE 400 ROCKVILLE MD 20850 false true false false Chief Medical Officer 0 Ordinary Shares 2026-09-17 4 M 0 23695 A 181636 D Ordinary Shares 2026-09-18 4 S 0 8209 0.71 D 173427 D Restricted Share Units 2026-09-17 4 M 0 10302 0 D Ordinary Shares 10302 72120 D The Ordinary Shares may be represented by American Depositary Shares ("ADS"). Each 10 ADSs represent 23 Ordinary Shares of the Issuer. Reported securities are represented by 10,302 ADSs. Each restricted stock unit ("RSU") represents a contingent right to receive one ADS. Reported securities are represented by 78,972 ADSs. Reported securities are represented by 3,569 ADSs. Reported sales price represents the converted sales price of the ADSs of $1.6247. Reported securities are represented by 75,403 ADSs. Reported securities represent ADSs. On June 17, 2024, the Reporting Person was granted 164,840 RSUs. The RSUs vested or shall vest over four years, with one-fourth vesting on the first anniversary of the grant date and the balance vesting ratably over the subsequent 12 quarters on the 17th day of each third month. /s/ Kyler Lei, Attorney-in-Fact 2026-09-21