Michael Waterman - 02 Jan 2026 Form 4 Insider Report for ACV Auctions Inc. (ACVA)

Role: Chief Sales Officer
Signature: /s/ Michelle Webb, Attorney-in-Fact
Issuer symbol: ACVA
Transactions as of: 02 Jan 2026
Net transactions value: -$115,272
Form type: 4
Filing time: 06 Jan 2026, 16:19:49 UTC
Previous filing: 03 Oct 2025
Next filing: 02 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Waterman Michael	Chief Sales Officer	C/O ACV AUCTIONS INC., 640 ELLICOTT ST., SUITE 321, BUFFALO	/s/ Michelle Webb, Attorney-in-Fact	06 Jan 2026	0001851495

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACVA	Common Stock	Tax liability	$36,468	-4,399	-1.2%	$8.29	362,815	02 Jan 2026	Direct	F1
transaction	ACVA	Common Stock	Tax liability	$32,530	-3,924	-1.1%	$8.29	358,891	02 Jan 2026	Direct	F1
transaction	ACVA	Common Stock	Tax liability	$46,275	-5,582	-1.6%	$8.29	354,502	02 Jan 2026	Direct	F1, F2

* 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.
F2	Includes 1,193 shares acquired pursuant to the Company's 2021 Employee Stock Purchase Plan (ESPP) for the purchase period of 6/1/2025 to 11/30/2025.