Cong Claire Xu - 04 Jul 2026 Form 4 Insider Report for NovaBridge Biosciences (NBP)

Reporting relationship: SVP, Clinical Development
Issuer ticker: NBP
Reported as of: 04 Jul 2026
Net transaction value: -$3,992
SEC form: 4
Accepted by SEC: 07 Jul 2026, 19:50:18 UTC
Prior SEC filing: 02 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Kyler Lei as attorney-in-fact

Key filing fact

Cong Claire Xu filed Form 4 for NovaBridge Biosciences (NBP) on 07 Jul 2026.

Key facts

This page summarizes Cong Claire Xu's Form 4 filing for NovaBridge Biosciences (NBP).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 07 Jul 2026, 19:50.

Change

Previous filing in this sequence was filed on 02 Jun 2026.
Current net transaction value: -$3,992.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002114309 Primary reporting owner

Xu Cong Claire

Relationship: SVP, Clinical Development
Address: C/O NOVABRIDGE BIOSCIENCES, 2440 RESEARCH BOULEVARD, SUITE 400, ROCKVILLE
Signature: /s/ Kyler Lei as attorney-in-fact
Signature date: 07 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NBP transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +12,432
Change %: +4.3%
Price
Shares after: 302,586
Date: 04 Jul 2026
Ownership: Direct
Footnotes: F1, F2, F3, F4

NBP transaction

Ordinary Shares

Sale

Transaction value: $3,992
Shares: -4,485
Change %: -1.5%
Price: $0.8900
Shares after: 298,101
Date: 06 Jul 2026
Ownership: Direct
Footnotes: F1, F5, F6, F7

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NBP transaction Derivative

Restricted Share Units

Options Exercise

Transaction value
Shares: -5,405
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 Jul 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 5,405
Exercise price
Footnotes: F1, F3, F8, F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

The Ordinary Shares may be represented by American Depositary Shares ("ADS"). Each 10 ADSs represent 23 Ordinary Shares of the Issuer.

Footnote F2

Reported securities are represented by 5,405 ADSs.

Footnote F3

Each restricted stock unit ("RSU") represents a contingent right to receive one ADS.

Footnote F4

Reported securities are represented by 131,559 ADSs.

Footnote F5

Reported securities are represented by 1,950 ADSs.

Footnote F6

Reported sales price represents the converted sales price of the ADSs of $2.04.

Footnote F7

Reported securities are represented by 129,609 ADSs.

Footnote F8

Reported securities represent ADSs.

Footnote F9

Fully vested.