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NovaBridge Biosciences (NBP) SVP exercises RSUs and sells Ordinary Shares in Form 4 filing

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

NovaBridge Biosciences senior executive Xu Cong Claire reported option exercises and a share sale. On July 4, 2026, she exercised derivative awards, converting 5,405 Restricted Share Units, represented by 5,405 American Depositary Shares (ADSs), into 12,432 Ordinary Shares at a conversion price of $0.00 per share.

On July 6, 2026, she completed an open-market sale of 4,485 Ordinary Shares at an average price of $0.89 per share, equivalent to an ADS sales price of $2.04. Following these transactions, she directly holds 298,101 Ordinary Shares, which the filing states are represented by 129,609 ADSs.

Positive

  • None.

Negative

  • None.
Insider Xu Cong Claire
Role SVP, Clinical Development
Sold 4,485 shs ($4K)
Type Security Shares Price Value
Sale Ordinary Shares 4,485 $0.89 $4K
Exercise Restricted Share Units 5,405 $0.00 --
Exercise Ordinary Shares 12,432 $0.00 --
Holdings After Transaction: Ordinary Shares — 298,101 shares (Direct, null); Restricted Share Units — 0 shares (Direct, null)
Footnotes (1)
  1. 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 5,405 ADSs. Each restricted stock unit ("RSU") represents a contingent right to receive one ADS. Reported securities are represented by 131,559 ADSs. Reported securities are represented by 1,950 ADSs. Reported sales price represents the converted sales price of the ADSs of $2.04. Reported securities are represented by 129,609 ADSs. Reported securities represent ADSs. Fully vested.
Shares sold 4,485 Ordinary Shares Open-market sale on July 6, 2026
Sale price $0.89 per Ordinary Share Average price for July 6, 2026 sale
ADS sale price $2.04 per ADS Converted sales price for ADSs linked to sold shares
RSUs exercised 5,405 Restricted Share Units Exercised on July 4, 2026 into Ordinary Shares
Shares acquired via exercise 12,432 Ordinary Shares Resulting from derivative exercise at $0.00 per share
Post-transaction holdings 298,101 Ordinary Shares Direct ownership after reported transactions
ADS representation of holdings 129,609 ADSs ADSs representing 298,101 Ordinary Shares after transactions
ADS to Ordinary ratio 10 ADSs = 23 Ordinary Shares Stated ratio between ADSs and Ordinary Shares
American Depositary Shares financial
"The Ordinary Shares may be represented by American Depositary Shares ("ADS")."
American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.
Restricted Share Units financial
"security_title: "Restricted Share Units" in a derivative transaction entry."
Restricted share units (RSUs) are a promise from a company to give an employee or service provider actual shares or cash equal to the shares after certain conditions are met, typically staying with the company for a set time or hitting performance targets. Think of them like a time-locked gift card that becomes usable only after you’ve earned it. For investors, RSUs matter because they align employee incentives with company performance and can increase the number of shares outstanding over time, diluting existing ownership and affecting earnings per share.
restricted stock unit ("RSU") financial
"Each restricted stock unit ("RSU") represents a contingent right to receive one ADS."
open-market sale financial
"transaction_action: "open-market sale" for the 4,485 Ordinary Shares transaction."
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
derivative security financial
"transaction_code_description: "Exercise or conversion of derivative security"."
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
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Form 4 Insider Transactions: What Each Field Means →

FAQ

What did NovaBridge Biosciences (NBP) executive Xu Cong Claire report in this Form 4?
Xu Cong Claire reported exercising equity awards and selling shares. She converted 5,405 Restricted Share Units into Ordinary Shares, then sold 4,485 Ordinary Shares in an open-market transaction while retaining 298,101 Ordinary Shares after the reported transactions.

How many NovaBridge Biosciences (NBP) shares did the executive sell and at what price?
She sold 4,485 Ordinary Shares in an open-market transaction at an average price of $0.89 per share. A footnote explains this corresponds to a converted ADS sales price of $2.04 for the American Depositary Shares representing the Ordinary Shares.

What equity awards did Xu Cong Claire exercise in NovaBridge Biosciences (NBP)?
She exercised derivative awards linked to Restricted Share Units. The filing shows 5,405 Restricted Share Units, represented by 5,405 American Depositary Shares, were converted into 12,432 Ordinary Shares at a conversion price of $0.00 per share before the subsequent share sale.

How many NovaBridge Biosciences (NBP) shares does the executive hold after these transactions?
After the reported exercise and sale, she directly holds 298,101 Ordinary Shares. A related footnote clarifies that these Ordinary Shares are represented by 129,609 American Depositary Shares, providing the ADS equivalent for investors who trade the ADSs instead of local shares.

What role does Xu Cong Claire hold at NovaBridge Biosciences (NBP)?
She serves as Senior Vice President, Clinical Development at NovaBridge Biosciences. Her Form 4 reflects equity activity tied to this executive role, including the exercise of Restricted Share Units and subsequent sale of a portion of the Ordinary Shares received from those awards.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Xu Cong Claire
(Last)(First)(Middle)
C/O NOVABRIDGE BIOSCIENCES
2440 RESEARCH BOULEVARD, SUITE 400
(Street)
ROCKVILLE MARYLAND 20850
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
NovaBridge Biosciences [ NBP ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
SVP, Clinical Development
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/04/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares(1)07/04/2026M12,432(2)A(3)302,586(4)D
Ordinary Shares(1)07/06/2026S4,485(5)D$0.89(6)298,101(7)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Share Units(3)07/04/2026M5,405(8) (9) (9)Ordinary Shares(1)5,405(8)$00(8)D
Explanation of Responses:
1. The Ordinary Shares may be represented by American Depositary Shares ("ADS"). Each 10 ADSs represent 23 Ordinary Shares of the Issuer.
2. Reported securities are represented by 5,405 ADSs.
3. Each restricted stock unit ("RSU") represents a contingent right to receive one ADS.
4. Reported securities are represented by 131,559 ADSs.
5. Reported securities are represented by 1,950 ADSs.
6. Reported sales price represents the converted sales price of the ADSs of $2.04.
7. Reported securities are represented by 129,609 ADSs.
8. Reported securities represent ADSs.
9. Fully vested.
/s/ Kyler Lei as attorney-in-fact07/07/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR