NovaBridge director exercises 7,486 RSUs into ADSs

NovaBridge Biosciences (NBP) director Lenz Robert A. reported an exercise of equity awards and a related share acquisition.

Rhea-AI Filing Summary

NovaBridge Biosciences (NBP) director Lenz Robert A. reported an exercise of equity awards and a related share acquisition. On August 22, 2026, he exercised 7,486 restricted share units (RSUs), each convertible into one American Depositary Share (ADS), which together correspond to 17,218 Ordinary Shares. These exercises reduced his RSU balance but increased his direct non-derivative holdings to 17,218 Ordinary Shares, while he continues to hold 14,974 RSUs that remain outstanding and subject to vesting from an original grant of 22,460 RSUs awarded on August 22, 2025.

Insider Trade Summary

7,486 shares exercised/converted

Exercise 2 txns

Insider Lenz Robert A.

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units F3, F4, F5	7,486	$0.00	$0.00
Exercise	Ordinary Shares F1, F2, F3	17,218	--	--

Holdings After Transaction: Restricted Share Units — 14,974 contracts (Direct); Ordinary Shares — 17,218 shares (Direct)

Footnotes (5)

1. F1. The Ordinary Shares may be represented by American Depositary Shares ("ADS"). Each 10 ADSs represent 23 Ordinary Shares of the Issuer.
2. F2. Reported securities are represented by 7,486 ADSs.
3. F3. Each restricted stock unit ("RSU") represents a contingent right to receive one ADS.
4. F4. Reported securities represent ADSs.
5. F5. On August 22, 2025, the Reporting Person was granted 22,460 restricted share units ("RSUs"). The RSUs vested or shall vest over three years in three equal annual installments on August 22, 2026, 2027 and 2028.

Key Figures

RSUs exercised: 7,486 restricted share units Ordinary Shares acquired: 17,218 Ordinary Shares RSUs remaining after transaction: 14,974 restricted share units +3 more

6 metrics

RSUs exercised 7,486 restricted share units Exercised by Lenz Robert A. on August 22, 2026

Ordinary Shares acquired 17,218 Ordinary Shares Resulting from exercise of 7,486 RSUs represented by 7,486 ADSs

RSUs remaining after transaction 14,974 restricted share units Total RSUs directly held following the August 22, 2026 transactions

Original RSU grant 22,460 restricted share units Granted to Lenz Robert A. on August 22, 2025

ADS to Ordinary Share ratio 10 ADSs represent 23 Ordinary Shares Ratio stated for NovaBridge Biosciences securities

ADSs from RSU exercise 7,486 ADSs Reported securities received upon exercise of RSUs

Key Terms

Restricted Share Units, American Depositary Shares, restricted stock unit ("RSU"), contingent right

4 terms

Restricted Share Units financial

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

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.

American Depositary Shares financial

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

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 stock unit ("RSU") financial

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

contingent right financial

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

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did NovaBridge Biosciences (NBP) report for Lenz Robert A.?

Lenz Robert A., a director of NovaBridge Biosciences (NBP), reported exercising 7,486 restricted share units on August 22, 2026, receiving ADSs equivalent to 17,218 Ordinary Shares, and increasing his direct non-derivative holdings to that same 17,218 Ordinary Shares figure.

How many NovaBridge Biosciences (NBP) RSUs did Lenz Robert A. exercise and when?

He exercised 7,486 restricted share units (RSUs) on August 22, 2026. Each RSU represents a contingent right to receive one ADS, and the reported securities from this exercise are represented by 7,486 ADSs tied to NovaBridge Biosciences.

What is Lenz Robert A.’s NovaBridge Biosciences (NBP) shareholding after the reported Form 4 transactions?

After the reported transactions, Lenz Robert A. directly holds 17,218 Ordinary Shares of NovaBridge Biosciences, represented by 7,486 ADSs. He also continues to hold 14,974 RSUs that remain outstanding from his prior equity grant.

What RSU grant underlies the current NovaBridge Biosciences (NBP) Form 4 for Lenz Robert A.?

The transactions relate to a grant of 22,460 restricted share units (RSUs) awarded on August 22, 2025. Those RSUs vest in three equal annual installments on August 22, 2026, 2027, and 2028, with a portion now exercised into ADSs.

How are NovaBridge Biosciences (NBP) ADSs related to Ordinary Shares in this filing?

The filing states that each 10 ADSs represent 23 Ordinary Shares of NovaBridge Biosciences. The reported securities from the RSU exercise are represented by 7,486 ADSs, which correspond to 17,218 Ordinary Shares in the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/25/2026 - 04:15 PM EDT Accepted by SEC EDGAR 08/25/2026 - 04:15 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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^*

Lenz Robert A.

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/22/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares(1)	08/22/2026		M		17,218(2)	A	(3)	17,218(2)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Units	(3)	08/22/2026		M			7,486(4)	(5)	(5)	Ordinary Shares	7,486	$0	14,974(4)	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 7,486 ADSs.

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

4. Reported securities represent ADSs.

5. On August 22, 2025, the Reporting Person was granted 22,460 restricted share units ("RSUs"). The RSUs vested or shall vest over three years in three equal annual installments on August 22, 2026, 2027 and 2028.

	/s/Kyler Lei, Attorney-in-Fact	08/25/2026
	** Signature of Reporting Person	Date
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)