X0306 4 2021-07-30 0 0001637873 ACV Auctions Inc. ACVA 0001852174 Anderson Craig Eric C/O ACV AUCTIONS INC. 640 ELLICOTT STREET, #321 BUFFALO NY 14203 0 1 0 0 CCDSO and Chief Legal Officer Class A Common Stock 2021-07-30 4 C 0 40000 A 40000 D Class A Common Stock 2021-07-30 4 S 0 40000 23.0965 D 0 D Employee Stock Option (Right to Buy) 0.66 2021-07-30 4 M 0 40000 0.00 D 2028-06-17 Class B Common Stock 40000 498998 D Class B Common Stock 2021-07-30 4 M 0 40000 0.00 A Class A Common Stock 40000 40000 D Class B Common Stock 2021-07-30 4 C 0 40000 0.00 D Class A Common Stock 40000 0 D Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock. Each share of Class B Common Stock will convert automatically into shares of Class A common stock, on a one-to-one basis, upon the following: (1) the sale or transfer of such share of Class B Common Stock, subject to certain exceptions specified in the Issuer's amended and restated certificate of incorporation; (2) the death of the Reporting Person; and (3) the final conversion date, defined as the earlier of (a) the first trading day on or after the date on which the outstanding shares of Class B Common Stock represent less than 5.0% of the Issuer's then-outstanding Class A and Class B Common Stock; (b) the tenth anniversary of this offering; or (c) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class. Shares sold pursuant to a Rule 10b5-1 trading plan. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.88 to $23.39, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3). One-fourth (1/4th) of the shares subject to the option award vested June 7, 2019, and thereafter one-forty-eighth of the shares subject to the option award vest monthly, subject to the Reporting Person's continuous service. /s/ Jason Minio, Attorney-in-Fact 2021-08-03