NovaBridge CMO exercises RSUs, sells 8,209 shares

NovaBridge Biosciences’ chief medical officer exercised RSUs into ADSs and then sold a portion of the resulting Ordinary Shares in open-market transactions.

Rhea-AI Filing Summary

NovaBridge Biosciences (NBP) reported that Chief Medical Officer Dennis Phillip Andrew exercised equity awards and sold a portion of his holdings. On September 17, 2026, he exercised 10,302 restricted share units, receiving 10,302 ADSs represented by 23,695 Ordinary Shares, bringing his position from this award to securities represented by 78,972 ADSs. On September 18, 2026, he sold 8,209 Ordinary Shares (represented by 3,569 ADSs) at $0.71 per Ordinary Share, corresponding to an ADS price of $1.6247, after which his reported holdings from this line were represented by 75,403 ADSs. No Rule 10b5-1 trading plan is indicated.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Dennis Phillip Andrew

Role Chief Medical Officer

Sold 8,209 shs ($6K)

Approx. gross sale proceeds $6K

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F5, F6, F7	8,209	$0.71	$6K
Exercise	Restricted Share Units F3, F8, F9, F1	10,302	$0.00	$0.00
Exercise	Ordinary Shares F1, F2, F3, F4	23,695	--	--

Holdings After Transaction: Restricted Share Units — 72,120 contracts (Direct); Ordinary Shares — 173,427 shares (Direct)

Footnotes (9)

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 10,302 ADSs.
3. F3. Each restricted stock unit ("RSU") represents a contingent right to receive one ADS.
4. F4. Reported securities are represented by 78,972 ADSs.
5. F5. Reported securities are represented by 3,569 ADSs.
6. F6. Reported sales price represents the converted sales price of the ADSs of $1.6247.
7. F7. Reported securities are represented by 75,403 ADSs.
8. F8. Reported securities represent ADSs.
9. F9. 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.

Key Figures

Ordinary Shares sold: 8,209 shares Sale price per Ordinary Share: $0.71 per share ADS sale price: $1.6247 per ADS +5 more

8 metrics

Ordinary Shares sold 8,209 shares Sale by Chief Medical Officer on September 18, 2026

Sale price per Ordinary Share $0.71 per share September 18, 2026 Ordinary Share sale

ADS sale price $1.6247 per ADS Converted sales price for ADSs related to the September 18, 2026 sale

Ordinary Shares from RSU exercise 23,695 shares Ordinary Shares represented by 10,302 ADSs from RSU exercise on September 17, 2026

RSUs exercised 10,302 RSUs Restricted share units exercised on September 17, 2026 into ADSs

ADS holdings after RSU-related transaction 78,972 ADSs Reported securities after September 17, 2026 transaction

ADS holdings after sale transaction 75,403 ADSs Reported securities after September 18, 2026 sale

RSU grant size 164,840 RSUs Grant on June 17, 2024, vesting over four years

Key Terms

American Depositary Shares, ADSs, Restricted Share Units, restricted stock unit ("RSU"), +1 more

5 terms

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.

ADSs financial

"Each 10 ADSs represent 23 Ordinary Shares of the Issuer."

Restricted Share Units financial

"On June 17, 2024, the Reporting Person was granted 164,840 RSUs."

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."

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 transactions did NovaBridge Biosciences (NBP) report for Dennis Phillip Andrew?

Dennis Phillip Andrew, Chief Medical Officer, exercised 10,302 restricted share units into ADSs represented by 23,695 Ordinary Shares on September 17, 2026, and sold 8,209 Ordinary Shares represented by 3,569 ADSs on September 18, 2026.

How many NovaBridge Biosciences (NBP) shares did the CMO sell and at what price?

On September 18, 2026, he sold 8,209 Ordinary Shares at $0.71 per Ordinary Share, which corresponds to an ADS sales price of $1.6247, with the sold shares represented by 3,569 ADSs.

What did the CMO of NBP receive from the RSU exercise?

On September 17, 2026, he exercised 10,302 restricted share units, each representing a contingent right to receive one ADS. The reported Ordinary Shares from this exercise total 23,695, represented by 10,302 ADSs.

What are the CMO’s reported NovaBridge Biosciences ADS holdings after these transactions?

After the September 17, 2026 RSU-related transaction, holdings from that line are represented by 78,972 ADSs. After the September 18, 2026 sale, the reported securities from that sale line are represented by 75,403 ADSs.

What is the ADS-to-Ordinary Share ratio for NovaBridge Biosciences (NBP)?

Each 10 American Depositary Shares (ADSs) represent 23 Ordinary Shares of NovaBridge Biosciences, according to the disclosure describing how Ordinary Shares may be represented by ADSs.

Was the NovaBridge Biosciences (NBP) insider trading under a Rule 10b5-1 plan?

No. The disclosure indicates that these transactions were not made under a Rule 10b5-1 trading plan, as the relevant affirmation checkbox is not marked and no plan is referenced in the footnotes.

What longer-term RSU grant underlies the recent RSU vesting for NBP’s CMO?

On June 17, 2024, he was granted 164,840 restricted stock units (RSUs). The RSUs vest over four years, with one-fourth on the first anniversary of the grant date and the remainder vesting ratably over the subsequent 12 quarters.

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

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Available on EDGAR 09/21/2026 - 04:05 PM Accepted by SEC EDGAR 09/21/2026 - 04:05 PM 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^*

Dennis Phillip Andrew

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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)	09/17/2026		M		23,695(2)	A	(3)	181,636(4)	D
Ordinary Shares(1)	09/18/2026		S		8,209(5)	D	$0.71(6)	173,427(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Units	(3)	09/17/2026		M			10,302(8)	(9)	(9)	Ordinary Shares(1)	10,302(8)	$0	72,120(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 10,302 ADSs.

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

4. Reported securities are represented by 78,972 ADSs.

5. Reported securities are represented by 3,569 ADSs.

6. Reported sales price represents the converted sales price of the ADSs of $1.6247.

7. Reported securities are represented by 75,403 ADSs.

8. Reported securities represent ADSs.

9. 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	09/21/2026
	** 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)