George Chamoun - Oct 1, 2025 Form 4 Insider Report for ACV Auctions Inc. (ACVA)

Role: Chief Executive Officer, Director
Signature: /s/ Michelle Webb, Attorney-in-Fact
Stock symbol: ACVA
Transactions as of: Oct 1, 2025
Transactions value $: -$336,388
Form type: 4
Date filed: 10/3/2025, 04:08 PM
Previous filing: Jul 3, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chamoun George	Chief Executive Officer, Director	C/O ACV AUCTIONS INC., 640 ELLICOTT ST., SUITE 321, BUFFALO	/s/ Michelle Webb, Attorney-in-Fact	2025-10-03	0001419488

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACVA	Common Stock	Tax liability	-$135K	-13.4K	-0.51%	$10.07	2.61M	Oct 1, 2025	Direct	F1
transaction	ACVA	Common Stock	Tax liability	-$94.9K	-9.42K	-0.36%	$10.07	2.6M	Oct 1, 2025	Direct	F1
transaction	ACVA	Common Stock	Tax liability	-$107K	-10.6K	-0.41%	$10.07	2.59M	Oct 1, 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares were withheld by the Issuer to cover the tax liability upon the vesting of a time-based restricted stock unit previously granted, and does not represent a discretionary sale by the reporting person.