Adicet Bio, Inc. Insider Trading Activity

Adicet Bio President & CEO Schor Chen reported a routine share withholding related to equity compensation.

Accepted by SEC EDGAR 01/27/2026 - 04:45 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Adicet Bio President & CEO Schor Chen reported a routine share withholding related to equity compensation. On January 24, 2026, the company withheld 1,755 shares of common stock at $8.44 per share to cover tax obligations from vesting restricted stock units, which is not a market sale.

After this transaction, Chen reports 6,820 common shares held directly. In addition, 2,716 shares are held indirectly through The I. Schor IRRV Trust and 3,339 shares are held indirectly through The C. Schor IRRV Trust, both irrevocable family trusts with independent trustees. The holdings reflect a previously effected 1-for-16 reverse stock split.

Insider Trade Summary

Exercise Price or Tax Liability: 1,755 shares

Exercise Price or Tax Liability 1 txn

Insider Schor Chen

Role President & CEO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	1,755	$8.44	$15K
Holding	Common Stock	--	--	--
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 6,820 shares (Direct); Common Stock — 6,055 shares (Indirect, See Footnote)

Holdings Before and After: Common Stock, 8,575 to 6,820 shares (Direct)

Footnotes (4)

1. F1. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units and does not represent a sale by the Reporting Person.
2. F2. Reflects a 1-for-16 reverse stock split effected by the Issuer on December 30, 2025.
3. F3. Represents shares held directly by The I. Schor IRRV Trust, an irrevocable family trust having an independent trustee.
4. F4. Represents shares held directly by The C. Schor IRRV Trust, an irrevocable family trust having an independent trustee.

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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^*

Schor Chen

(Last) (First) (Middle)

C/O ADICET BIO, INC.

131 DARTMOUTH STREET, FLOOR 3

(Street)

BOSTON MA 02116

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Adicet Bio, Inc. [ ACET ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/24/2026

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

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 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
Common Stock	01/24/2026		F(1)		1,755	D	$8.44	6,820(2)	D
Common Stock								2,716(2)	I	See Footnote(3)
Common Stock								3,339(2)	I	See Footnote(4)

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

Explanation of Responses:

1. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units and does not represent a sale by the Reporting Person.

2. Reflects a 1-for-16 reverse stock split effected by the Issuer on December 30, 2025.

3. Represents shares held directly by The I. Schor IRRV Trust, an irrevocable family trust having an independent trustee.

4. Represents shares held directly by The C. Schor IRRV Trust, an irrevocable family trust having an independent trustee.

	/s/ Nick Harvey, Attorney-in-Fact	01/27/2026
	** 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.