SEC FORM 3

SEC FORM 3SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Cao Sean Wuxiong

(Last)

(First)

(Middle)

C/O NOVABRIDGE BIOSCIENCES,

2440 RESEARCH BOULEVARD, SUITE 400

(Street)

ROCKVILLE

MARYLAND

20850

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
NovaBridge Biosciences [ NBP ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares⁽¹⁾	56,472⁽²⁾	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
2025 Employee Share Option (right to buy)	⁽⁴⁾	05/28/2035	Ordinary Shares⁽¹⁾	19,370⁽³⁾⁽⁴⁾	$1.17⁽³⁾	D
2025 Employee Share Option (right to buy)	⁽⁵⁾	09/03/2035	Ordinary Shares⁽¹⁾	408,929⁽³⁾	$4.65⁽³⁾	D
Restricted Share Units	⁽⁶⁾	⁽⁶⁾	Ordinary Shares⁽¹⁾	408,933⁽³⁾	⁽⁶⁾	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 24,553 ADSs.

3. Number of underlying securities and exercise price expressed in terms of ADSs.

4. The option was granted on May 28, 2025 and is vested and exercisable. Amount of underlying securities excludes a portion of the option that was forfeited upon the Reporting Person's appointment as an officer of the Issuer.

5. The option was granted on September 3, 2025. The option vests and becomes exercisable, if at all, in eight equal quarterly installments following the date on which the 30-trading-day weighted average price of the Issuer's ADSs (based on trading days only) is at or above US$8.00.

6. On September 3, 2025, the Reporting Person was granted 408,933 restricted share units ("RSUs"). Each RSU represents a contingent right to receive one ADS. 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 third day of each third month.

Remarks:

Chief Business Development Officer and Director Exhibit List: Ex. 24.1 - Power of Attorney

	/s/ Xi-Yong (Sean) Fu as attorney-in-fact	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)

SEC Form 3 filed by new insider Cao Sean Wuxiong