Adicet Bio (ACET) holder Tang Capital reports 0.1% ownership stake

Rhea-AI Filing Summary

Adicet Bio, Inc. shareholder Tang Capital Management and affiliated entities report beneficial ownership of 6,158 common shares, representing about 0.1% of the company’s outstanding common stock. The filing attributes shared voting and dispositive power over these shares to Tang Capital Management, Kevin Tang, and Tang Capital Partners International, LP.

The percentage is based on 9,578,474 Adicet Bio common shares outstanding, after giving effect to a one‑for‑sixteen reverse stock split effective December 30, 2025. The reporting persons certify that the securities are not held for the purpose of changing or influencing control of Adicet Bio.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Adicet Bio, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

007002207

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

TANG CAPITAL MANAGEMENT, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 6,158.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 6,158.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,158.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: Tang Capital Management, LLC ("TCM") shares voting and dispositive power over such shares with Tang Capital Partners International, LP ("TCPI") and Kevin Tang. The percentages used herein are based on 9,578,474 shares of Common Stock outstanding, which reflects 153,255,581 shares of Common Stock outstanding as of November 3, 2025, as set forth in the Issuer's Quarterly Report filed on Form 10-Q that was filed with the Securities and Exchange Commission on November 5, 2025, adjusted for a one-for-sixteen reverse stock split effective as of December 30, 2025.

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

KEVIN TANG

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 6,158.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 6,158.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,158.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: Kevin Tang shares voting and dispositive power over such shares with TCPI and TCM.

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

TANG CAPITAL PARTNERS, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

TANG CAPITAL PARTNERS INTERNATIONAL, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 6,158.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 6,158.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,158.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: TCPI shares voting and dispositive power over such shares with TCM and Kevin Tang.

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

TANG CAPITAL PARTNERS III, INC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEVADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP No. 007002207

1

Names of Reporting Persons

TANG CAPITAL PARTNERS IV, INC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEVADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Adicet Bio, Inc.
(b)	Address of issuer's principal executive offices: 131 Dartmouth Street, 3rd Floor, Boston, MA, 02116
Item 2.
(a)	Name of person filing: This Statement on Schedule 13G (this "Statement") is filed by TCM, the general partner of Tang Capital Partners, LP ("TCP") and TCPI; Kevin Tang, the manager of TCM and Chief Executive Officer of Tang Capital Partners III, Inc. ("TCP III") and Tang Capital Partners IV, Inc. ("TCP IV"); TCP; TCPI; TCP III; and TCP IV.
(b)	Address or principal business office or, if none, residence: The address of TCM, Kevin Tang, TCP and TCPI is 4747 Executive Drive, Suite 210, San Diego, CA 92121. The address of TCP III and TCP IV is 400 S. 4th Street, 3rd Floor, Las Vegas, NV 89101.
(c)	Citizenship: TCM is a Delaware limited liability company. Mr. Tang is a United States citizen. TCP and TCPI are Delaware limited partnerships. TCP III and TCP IV are Nevada corporations that are indirectly wholly owned by TCP.
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP No.: 007002207
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 6,158
(b)	Percent of class: 0.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0 shares
	(ii) Shared power to vote or to direct the vote: 6,158 shares
	(iii) Sole power to dispose or to direct the disposition of: 0 shares
	(iv) Shared power to dispose or to direct the disposition of: 6,158 shares
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

TANG CAPITAL MANAGEMENT, LLC

Signature:	/s/ Kevin Tang
Name/Title:	Manager
Date:	02/17/2026

KEVIN TANG

Signature:	/s/ Kevin Tang
Name/Title:	Self
Date:	02/17/2026

TANG CAPITAL PARTNERS, LP

Signature:	/s/ Kevin Tang
Name/Title:	Manager, Tang Capital Management, LLC, General Partner
Date:	02/17/2026

TANG CAPITAL PARTNERS INTERNATIONAL, LP

Signature:	/s/ Kevin Tang
Name/Title:	Manager, Tang Capital Management, LLC, General Partner
Date:	02/17/2026

TANG CAPITAL PARTNERS III, INC

Signature:	/s/ Kevin Tang
Name/Title:	Chief Executive Officer
Date:	02/17/2026

TANG CAPITAL PARTNERS IV, INC

Signature:	/s/ Kevin Tang
Name/Title:	Chief Executive Officer
Date:	02/17/2026

FAQ

What ownership stake in Adicet Bio (ACET) does Tang Capital report?

Tang Capital and affiliated entities report beneficial ownership of 6,158 Adicet Bio common shares, representing about 0.1% of the outstanding common stock. This small stake reflects ownership of 5 percent or less of the class, as disclosed in the Schedule 13G/A amendment.

How many Adicet Bio (ACET) shares are outstanding in this filing?

The filing states that Adicet Bio has 9,578,474 common shares outstanding, reflecting 153,255,581 shares adjusted for a one‑for‑sixteen reverse stock split effective December 30, 2025. Tang Capital’s 6,158 shares are measured against this post‑split outstanding share count.

Which Tang Capital entities are included in the Adicet Bio (ACET) Schedule 13G/A?

The Schedule 13G/A covers Tang Capital Management, LLC, Kevin Tang, Tang Capital Partners International, LP, Tang Capital Partners, LP, and Tang Capital Partners III and IV, Inc. Shared voting and dispositive power over 6,158 shares is reported among Tang Capital Management, Kevin Tang, and Tang Capital Partners International.

Does Tang Capital seek control of Adicet Bio (ACET) with this stake?

The reporting persons explicitly certify that the securities were not acquired and are not held to change or influence control of Adicet Bio. They also state the holdings are not part of any transaction intended to affect control, other than activities related to specific nomination provisions.

What is the significance of Item 5 in this Adicet Bio (ACET) Schedule 13G/A?

Item 5 notes ownership of 5 percent or less of a class, confirming Tang Capital’s reported holdings represent only 0.1% of Adicet Bio’s common stock. This signals that, as of the event date, the group is well below the 5% beneficial ownership threshold.

What is the event date for Tang Capital’s Adicet Bio (ACET) holdings?

The date of the event requiring this Schedule 13G/A amendment is December 31, 2025. The beneficial ownership information, including the 6,158 shares and 0.1% figure, is reported as of that event date and reflects the reverse stock split effective December 30, 2025.