Acrivon (ACRV) Chief Legal Officer reports 659-share tax withholding

Rhea-AI Filing Summary

Acrivon Therapeutics, Inc. insider Mary Miller, the company’s Chief Legal Officer, reported a routine share withholding related to equity compensation. On 01/17/2026, 659 shares of common stock were withheld at a price of $1.98 per share to cover mandatory tax withholding when her restricted stock units vested. After this transaction, she beneficially owned 33,896 shares of Acrivon common stock, held directly. This type of transaction does not represent an open-market sale but an automatic tax-related adjustment.

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

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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^*

Miller Mary

(Last) (First) (Middle)

C/O ACRIVON THERAPEUTICS, INC.

480 ARSENAL WAY, SUITE 100

(Street)

WATERTOWN MA 02472

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Acrivon Therapeutics, Inc. [ ACRV ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/17/2026

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	01/17/2026		F(1)		659	D	$1.98	33,896	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

Explanation of Responses:

1. Shares withheld by the Issuer to satisfy the mandatory tax withholding requirement upon vesting of restricted stock units.

	/s/ Adam D. Levy, Attorney-in-Fact	01/21/2026
	** 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).
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FAQ

What insider transaction did ACRV Chief Legal Officer Mary Miller report?

Mary Miller reported that 659 shares of Acrivon Therapeutics common stock were withheld on 01/17/2026 to satisfy tax obligations upon vesting of restricted stock units.

Was the ACRV Form 4 transaction an open-market sale of shares?

No. The Form 4 states that the 659 shares were withheld by the issuer to meet mandatory tax withholding when restricted stock units vested, rather than being sold in the open market.

How many ACRV shares does Mary Miller own after this Form 4 transaction?

Following the reported transaction, Mary Miller beneficially owned 33,896 shares of Acrivon Therapeutics common stock, held directly.

What does transaction code "F" mean in the ACRV Form 4 filing?

Transaction code "F" indicates shares were used to pay tax withholding obligations upon the vesting of equity awards, such as restricted stock units.

What role does Mary Miller hold at Acrivon Therapeutics (ACRV)?

Mary Miller is identified in the filing as an officer of Acrivon Therapeutics, serving as the company’s Chief Legal Officer.

Does the ACRV insider transaction change Mary Miller’s ownership form?

No. The Form 4 shows her ownership remains direct (D) following the tax withholding transaction.