CBC-led funds (NASDAQ: NBP) hold 30,499,709 NovaBridge shares

Rhea-AI Filing Summary

NovaBridge Biosciences large shareholder affiliates of CBC Group, including multiple C‑Bridge and I‑Bridge funds and vehicles, filed Amendment No. 2 to Schedule 13D for the company’s ordinary shares and ADSs.

The filing shows that Wei Fu may be deemed to beneficially own 30,499,709 ordinary shares, or 11.5% of NovaBridge’s outstanding ordinary shares, based on 265,169,373 ordinary shares outstanding following an underwritten offering described in a Form 6‑K. Other reporting entities, such as C‑Bridge Healthcare Fund II, L.P. and C‑Bridge Capital GP, Ltd., report beneficial ownership stakes ranging from 0.9% to 8.8%.

The filing also explains that each ten (10) ADSs represents twenty‑three (23) ordinary shares, and notes that Nova Aqua Limited recently purchased ADSs in open‑market broker transactions, detailed in a referenced Schedule I.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

NovaBridge Biosciences

(Name of Issuer)

Ordinary Shares, par value $0.0001 per share (Including Ordinary Shares Underlying American Depository Shares)

(Title of Class of Securities)

44975P103

(CUSIP Number)

Jianming Ma
c/o CBC Group, 62F Tower 1, Plaza 66, 1266 West Nanjing
Shanghai, F4, 200040
86 21 80123200

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

01/29/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

CBC Investment I-Mab Limited

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

VIRGIN ISLANDS, BRITISH

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 11,784,164.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 11,784,164.00

11

Aggregate amount beneficially owned by each reporting person

11,784,164.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

4.4 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

IBC Investment Seven Limited

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

HONG KONG

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,641,554.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,641,554.00

11

Aggregate amount beneficially owned by each reporting person

3,641,554.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

1.4 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

CBC SPVII LIMITED

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

HONG KONG

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 5,574,560.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 5,574,560.00

11

Aggregate amount beneficially owned by each reporting person

5,574,560.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

2.1 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

C-Bridge II Investment Ten Limited

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

VIRGIN ISLANDS, BRITISH

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,369,546.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,369,546.00

11

Aggregate amount beneficially owned by each reporting person

2,369,546.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.9 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

Nova Aqua Limited

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

VIRGIN ISLANDS, BRITISH

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 7,129,885.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 7,129,885.00

11

Aggregate amount beneficially owned by each reporting person

7,129,885.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

2.7 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

C-Bridge Healthcare Fund II, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 14,153,710.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 14,153,710.00

11

Aggregate amount beneficially owned by each reporting person

14,153,710.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

5.3 %

14

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

C-Bridge Healthcare Fund GP II, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 14,153,710.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 14,153,710.00

11

Aggregate amount beneficially owned by each reporting person

14,153,710.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

5.3 %

14

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

C-Bridge Capital GP, Ltd.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 23,369,824.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 23,369,824.00

11

Aggregate amount beneficially owned by each reporting person

23,369,824.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

8.8 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

I-Bridge Healthcare Fund, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 9,216,114.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 9,216,114.00

11

Aggregate amount beneficially owned by each reporting person

9,216,114.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

3.5 %

14

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

I-Bridge Healthcare GP, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 9,216,114.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 9,216,114.00

11

Aggregate amount beneficially owned by each reporting person

9,216,114.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

3.5 %

14

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

I-Bridge Capital GP, Ltd.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 9,216,114.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 9,216,114.00

11

Aggregate amount beneficially owned by each reporting person

9,216,114.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

3.5 %

14

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13D

CUSIP No. 44975P103

1

Name of reporting person

Wei Fu

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

SINGAPORE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 30,499,709.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 30,499,709.00

11

Aggregate amount beneficially owned by each reporting person

30,499,709.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

11.5 %

14

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Ordinary Shares, par value $0.0001 per share (Including Ordinary Shares Underlying American Depository Shares)
(b)	Name of Issuer: NovaBridge Biosciences
(c)	Address of Issuer's Principal Executive Offices: SUITE 400, 2440 RESEARCH BLVD, ROCKVILLE, MARYLAND , 20850.
Item 1 Comment: Explanatory Note: This statement constitutes Amendment No. 2 ("Amendment No. 2") to the Statement on Schedule 13D filed with the Securities and Exchange Commission (the "SEC") on February 5, 2025 (the "Original Schedule 13D") as amended by Amendment No. 1 filed on August 5, 2025 (the Original Schedule 13D as so amended, the "Schedule 13D"), jointly by (i) CBC Investment l-Mab Limited, a British Virgin Islands company ("CBC"), (ii) IBC Investment Seven Limited, a Hong Kong company ("IBC"), (iii) CBC SPVII Limited, a Hong Kong ("CBC SPVII"), (iv) C-Bridge II Investment Ten Limited, a British Virgin Islands company ("C-Bridge"), (v) Nova Aqua Limited, a British Virgin company ("Nova"), (vi) C-Bridge Healthcare Fund II, L.P., a Cayman Islands limited partnership ("C-Bridge Healthcare"), (vii) C-Bridge Healthcare Fund GP II, L.P., a Cayman Islands limited partnership ("C-Bridge Healthcare GP"), (viii) C-Bridge Capital GP, Ltd., a Cayman Islands company ("C-Bridge Capital"), (ix) l-Bridge Healthcare Fund, L.P., a Cayman Islands limited partnership ("I- Bridge"), (x) l-Bridge Healthcare GP, L.P., a Cayman Islands limited partnership ("l-Bridge GP"), (xi) I- Bridge Capital GP, Ltd., a Cayman Islands company ("l-Bridge Capital") and (xii) Wei Fu, a citizen of Singapore ("Mr. Fu" and collectively, the "Reporting Persons"). Except as amended hereby, the Schedule 13D remains in full force and effect. All capitalized terms contained but not otherwise defined herein shall have the meanings ascribed to such terms in the Schedule 13D. Responses to each item of the Schedule 13D, as amended by this Amendment No. 2, are incorporated by reference into the responses to each other item, as applicable.
Item 2.	Identity and Background
(a)	This Amendment No. 2 is filed by (i) CBC, (ii) IBC, (iii) CBC SPVII, (iv) C-Bridge, (v) Nova, (vi) C-Bridge Healthcare, (vii) C-Bridge Healthcare GP, (viii) C-Bridge Capital, (ix) l-Bridge, (x) l-Bridge GP, (xi) l-Bridge Capital, and (xii) Mr. Fu
(c)	CBC Investment l-Mab Limited and C-Bridge II Investment Ten Limited are principally engaged in making investments and are controlled by C-Bridge Healthcare Fund II, L.P., which is principally engaged in making investments and whose general partner is C-Bridge Healthcare Fund GP II, L.P., and its general partner is C-Bridge Capital GP, Ltd. CBC SPVII Limited and IBC Investment Seven Limited are principally engaged in making investments and are controlled by I-Bridge Healthcare Fund, L.P., which is principally engaged in making investments, whose general partner is I-Bridge Healthcare GP, L.P., and its general partner is I-Bridge Capital GP, Ltd., which is indirectly controlled by C-Bridge Capital GP, Ltd. C-Bridge Healthcare Fund GP II, L.P., C-Bridge Capital GP, Ltd. and I-Bridge Healthcare GP, L.P. are principally engaged in being the general partner of their respective partnerships. Mr. Wei Fu may be deemed to control C-Bridge Capital GP, Ltd. and is principally engaged in making and managing investments. Nova Aqua Limited is held through a trust established by Mr. Wei Fu and is principally engaged in holding assets.
(f)	Each of CBC, C-Bridge and Nova is a British Virgin Islands company. Each of IBC and CBC SPVII is a Hong Kong company. Each of C-Bridge Capital and I-Bridge Capital is a Cayman Islands company. Each of C-Bridge Healthcare, C-Bridge Healthcare GP, I-Bridge and I-Bridge GP is a Cayman Islands limited partnership. Mr. Fu is a citizen of Singapore.
Item 5.	Interest in Securities of the Issuer
(a)	CBC is the record owner of 11,784,164 ordinary shares represented by 5,123,549 American Depositary Shares ("ADSs") (each ten (10) ADSs representing twenty-three (23) ordinary shares). CBC is controlled by C-Bridge Healthcare, C-Bridge Healthcare GP is the general partner of C-Bridge Healthcare, C-Bridge Capital is the general partner of C-Bridge Healthcare GP and Mr. Fu may be deemed to control C-Bridge Capital. IBC is the record owner of 3,641,544 ordinary shares represented by 1,583,284 ADSs. IBC is controlled by I-Bridge, I-Bridge GP is the general partner of I-Bridge, C-Bridge Capital is the general partner of I-Bridge GP and Mr. Fu may be deemed to control C-Bridge Capital. CBC SPVII is the record owner of 5,574,560 ordinary shares represented by 2,423,721 ADSs. CBC SPVII is controlled by I-Bridge, I-Bridge GP is the general partner of I-Bridge, C-Bridge Capital is the general partner of I-Bridge GP and Mr. Fu may be deemed to control C-Bridge Capital. C-Bridge is the record owner of 2,369,546 ordinary shares represented by 1,030,237 ADSs. C-Bridge is controlled by C-Bridge Healthcare, C-Bridge Healthcare GP is the general partner of C-Bridge Healthcare, C-Bridge Capital is the general partner of C-Bridge Healthcare GP and Mr. Fu may be deemed to control C-Bridge Capital. Nova is the record owner of 7,129,885 ordinary shares represented by 3,099,950 ADSs. The shares are held through a trust which was established by Mr. Fu (as the settlor) for the benefit of Mr. Wei Fu and his family. Each of CBC, IBC, CBC SPVII, C-Bridge, Nova, C-Bridge Healthcare, C-Bridge Healthcare GP, C-Bridge Capital, I-Bridge, I-Bridge GP, I-Bridge Capital and Mr. Fu may be deemed to beneficially own 4.4%, 1.4%, 2.1%, 0.9%, 2.7%, 5.3%, 5.3%, 8.8%, 3.5%, 3.5%, 3.5% and 11.5%, respectively, of the Issuer's outstanding ordinary shares, which percentages are calculated based on 265,169,373 ordinary shares outstanding following the completion of an underwritten offering, as described in the Issuers Current Report on Form 6-K, filed by the Issuer with Securities and Exchange Commission on December 18, 2025.
(b)	CBC shares voting and dispositive power over 11,784,164 ordinary shares represented by 5,123,549 ADSs. IBC shares voting and dispositive power over 3,641,544 ordinary shares represented by 1,583,284 ADSs. CBC SPVII shares voting and dispositive power over 5,574,560 ordinary shares represented by 2,423,721 ADSs. C-Bridge shares voting and dispositive power over 2,369,546 ordinary shares represented by 1,030,237 ADSs. Nova shares voting and dispositive power over 7,129,885 ordinary shares represented by 3,099,950 ADSs. C-Bridge Healthcare shares voting and dispositive power over 14,153,710 ordinary shares represented by 6,153,786 ADSs. C-Bridge Healthcare GP shares voting and dispositive power over 14,153,710 ordinary shares represented by 6,153,786 ADSs. C-Bridge Capital shares voting and dispositive power over 23,369,824 ordinary shares represented by 10,160,793 ADSs. I-Bridge shares voting and dispositive power over 9,216,114 ordinary shares represented by 4,007,006 ADSs. I-Bridge GP shares voting and dispositive power over 9,216,114 ordinary shares represented by 4,007,006 ADSs. I-Bridge Capital shares voting and dispositive power over 9,216,114 ordinary shares represented by 4,007,006 ADSs. Mr. Fu shares voting and dispositive power over 30,499,709 ordinary shares represented by 13,239,003 ADSs.
(c)	Schedule I sets forth the purchases of ADSs effected by Nova during the past 60 days and is incorporated by reference herein. All of the ADSs were purchased in open market transactions through a broker. Except as otherwise set forth herein, none of the Reporting Persons has effected any transactions in the Issuer's ordinary shares or ADSs during the past 60 days.
Item 7.	Material to be Filed as Exhibits.
	99.6 Schedule I, dated February 2, 2026.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

CBC Investment I-Mab Limited

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

IBC Investment Seven Limited

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

CBC SPVII LIMITED

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

C-Bridge II Investment Ten Limited

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

Nova Aqua Limited

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Authorized Signatory
Date:	02/03/2026

C-Bridge Healthcare Fund II, L.P.

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Authorized Representative
Date:	02/03/2026

C-Bridge Healthcare Fund GP II, L.P.

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Authorized Representative
Date:	02/03/2026

C-Bridge Capital GP, Ltd.

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

I-Bridge Healthcare Fund, L.P.

Signature:	/s/ Wei fu
Name/Title:	Wei Fu - Authorized Representative
Date:	02/03/2026

I-Bridge Healthcare GP, L.P.

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Authorized Representative
Date:	02/03/2026

I-Bridge Capital GP, Ltd.

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu - Director
Date:	02/03/2026

Wei Fu

Signature:	/s/ Wei Fu
Name/Title:	Wei Fu
Date:	02/03/2026

FAQ

What stake in NovaBridge Biosciences (NBP) does Wei Fu report on this Schedule 13D/A?

Wei Fu may be deemed to beneficially own 30,499,709 ordinary shares, or 11.5% of NovaBridge Biosciences. This percentage is calculated using 265,169,373 ordinary shares outstanding after an underwritten offering described in a Form 6‑K filed on December 18, 2025.

Which CBC Group and related entities are reporting ownership in NovaBridge Biosciences (NBP)?

Reporting entities include CBC Investment I-Mab Limited, IBC Investment Seven Limited, CBC SPVII Limited, C-Bridge II Investment Ten Limited, Nova Aqua Limited and several C-Bridge and I-Bridge funds and GPs. All are investment vehicles ultimately associated with CBC Group and Wei Fu.

How many NovaBridge Biosciences (NBP) shares does C-Bridge Capital GP, Ltd. report beneficially owning?

C-Bridge Capital GP, Ltd. reports beneficial ownership of 23,369,824 ordinary shares, representing 8.8% of NovaBridge’s outstanding ordinary shares. It shares voting and dispositive power over these shares, which are represented by 10,160,793 American Depositary Shares in the filing.

What is the ADS-to-ordinary-share ratio for NovaBridge Biosciences (NBP) in this filing?

The filing states that each ten (10) American Depositary Shares represent twenty-three (23) ordinary shares. This ratio is used to express the reporting persons’ holdings both in ordinary shares and in ADSs for clarity in the beneficial ownership disclosures.

Did any reporting person recently buy NovaBridge Biosciences (NBP) ADSs on the market?

Yes. The filing notes that Nova Aqua Limited purchased ADSs in open‑market broker transactions during the past 60 days. Specific trade details are set out in Schedule I, dated February 2, 2026, which is incorporated by reference as an exhibit.

On what share count are the reported NovaBridge Biosciences (NBP) ownership percentages based?

The reported ownership percentages are based on 265,169,373 ordinary shares outstanding. The filing states this share count reflects the issuer’s outstanding ordinary shares following completion of an underwritten offering described in a Current Report on Form 6‑K filed December 18, 2025.