X0609 4 2026-04-24 0001778016 NovaBridge Biosciences NBP 0002126029 Hagler Mark Arnold false C/O NOVABRIDGE BIOSCIENCES, 2440 RESEARCH BOULEVARD, SUITE 400 ROCKVILLE MD 20850 false true false false See Remarks false Ordinary Shares 2026-04-24 4 P false 230000 2.51 A 230000 D The Ordinary Shares may be represented by American Depositary Shares ("ADS"). Each 10 ADSs represent 23 Ordinary Shares of the Issuer. The reported securities are represented by 100,000 ADSs. The price reported in Column 4 is a weighted average price. These ADSs were purchased in multiple transactions at prices ranging from $2.44 to $2.54, inclusive. The Reporting Person undertakes to provide 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 within the range set forth in this footnote. President and Chief Commercial Officer /s/ Xi-Yong (Sean) Fu as attorney-in-fact 2026-04-28