Acrivon (ACRV) CDO has 404 shares withheld to cover RSU tax liability

Rhea-AI Filing Summary

Acrivon Therapeutics Chief Development Officer Erick Gamelin reported a routine tax-related share disposition. On the vesting of restricted stock units, 404 shares of common stock were withheld by the company at $1.92 per share to satisfy mandatory tax withholding obligations. After this withholding, Gamelin directly holds 14,408 shares of Acrivon common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Gamelin Erick

Role Chief Development Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	404	$1.92	$775.68

Holdings After Transaction: Common Stock — 14,408 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 404 shares Withholding price per share: $1.92 per share Shares held after transaction: 14,408 shares

3 metrics

Shares withheld for taxes 404 shares Mandatory tax withholding on RSU vesting

Withholding price per share $1.92 per share Value used for tax-withholding disposition

Shares held after transaction 14,408 shares Direct holdings after tax-withholding event

Key Terms

restricted stock units, mandatory tax withholding requirement, tax-withholding disposition, Common Stock

4 terms

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.

mandatory tax withholding requirement financial

"to satisfy the mandatory tax withholding requirement"

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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^*

Gamelin Erick

(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 Development Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		F(1)		404	D	$1.92	14,408	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	05/18/2026
	** 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)

FAQ

What insider transaction did Acrivon Therapeutics (ACRV) report for Erick Gamelin?

Acrivon Therapeutics reported that Chief Development Officer Erick Gamelin had 404 shares of common stock withheld. The shares were used to satisfy mandatory tax withholding when his restricted stock units vested, rather than representing an open-market sale.

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

No, the Form 4 shows a tax-withholding disposition, not an open-market sale. The issuer withheld 404 shares to cover required taxes upon RSU vesting, which is a standard, compensation-related mechanism rather than a discretionary trade in the market.

How many Acrivon (ACRV) shares does Erick Gamelin hold after this Form 4 event?

Following the reported tax-withholding transaction, Erick Gamelin directly holds 14,408 shares of Acrivon common stock. This figure reflects his position after 404 shares were withheld by the issuer to meet mandatory tax obligations linked to restricted stock unit vesting.

What price per share was used for the Acrivon (ACRV) tax-withholding shares?

The 404 withheld shares were valued at $1.92 per share for the tax-withholding transaction. This price is used administratively to calculate the value of shares applied to satisfy Gamelin’s tax liability on the vesting restricted stock units.

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

Transaction code "F" indicates payment of an exercise price or tax liability by delivering securities. In this Acrivon filing, it reflects shares withheld by the issuer to satisfy mandatory tax withholding when Erick Gamelin’s restricted stock units vested.