Acrivon CLO sells 185 shares for tax withholding

Acrivon Therapeutics, Inc. (ACRV) reported an insider transaction by Chief Legal Officer Mary Miller.

Rhea-AI Filing Summary

Acrivon Therapeutics, Inc. (ACRV) reported an insider transaction by Chief Legal Officer Mary Miller. On 2026-08-18, she sold 185 shares of common stock at $2.01 per share. The shares were sold automatically to satisfy mandatory tax withholding upon vesting of restricted stock units, and she now holds 82,009 shares directly.

Insider Trade Summary

Net Seller: 185 shares

Net Sell 1 txn

Insider Miller Mary

Role Chief Legal Officer

Sold 185 shs ($371.85)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	185	$2.01	$371.85

Holdings After Transaction: Common Stock — 82,009 shares (Direct)

Footnotes (1)

1. F1. Shares sold automatically to satisfy the mandatory tax withholding requirement upon vesting of restricted stock units.

Key Figures

Shares sold: 185 shares Sale price per share: $2.01 Shares owned after transaction: 82,009 shares +1 more

4 metrics

Shares sold 185 shares Common Stock sold on 2026-08-18

Sale price per share $2.01 Price per share for 185-share sale

Shares owned after transaction 82,009 shares Direct ownership following the sale

Net shares sold 185 shares Net buy/sell shares in this Form 4

Key Terms

mandatory tax withholding requirement, restricted stock units, open market or private transaction

3 terms

mandatory tax withholding requirement financial

"Shares sold automatically to satisfy the mandatory tax withholding requirement"

restricted stock units financial

"upon vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ACRV report for Mary Miller?

Mary Miller, Chief Legal Officer of Acrivon Therapeutics, Inc. (ACRV), reported selling 185 shares of common stock on 2026-08-18 at $2.01 per share. The sale was to cover mandatory tax withholding upon vesting of restricted stock units.

Was the ACRV insider sale by Mary Miller a discretionary trade?

The filing states the 185 shares were sold automatically to satisfy the mandatory tax withholding requirement upon vesting of restricted stock units, indicating it was a tax-related sale rather than a discretionary open-market liquidation.

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

After the reported transaction, Mary Miller directly holds 82,009 shares of Acrivon Therapeutics, Inc. common stock. This figure is disclosed as her total direct ownership following the 185-share tax-withholding sale.

What was the sale price in Mary Miller’s ACRV Form 4 transaction?

The reported sale price was $2.01 per share for the 185 shares of Acrivon Therapeutics, Inc. common stock sold on 2026-08-18, according to the Form 4 data.

Does the ACRV Form 4 mention a Rule 10b5-1 trading plan?

The Form 4 indicates the Rule 10b5-1 checkbox is not checked (aff_10b5_one = false), and the footnote describes the sale as automatic tax withholding upon restricted stock unit vesting, not as part of a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/20/2026 - 04:09 PM EDT Learn about SEC filing dates

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^*

Miller Mary

(Last) (First) (Middle)

C/O ACRIVON THERAPEUTICS, INC.

480 ARSENAL WAY, SUITE 100

(Street)

WATERTOWN MASSACHUSETTS 02472

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026

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

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

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

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	08/18/2026		S(1)		185	D	$2.01	82,009	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 sold automatically to satisfy the mandatory tax withholding requirement upon vesting of restricted stock units.

	/s/ Adam D. Levy, Attorney-in-Fact	08/20/2026
	** 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.
* Form 4: SEC 1474 (03-26)