X0306 4 2021-10-14 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 2021-10-14 4 C 0 5000 A 5000 D Class A Common Stock 2021-10-14 4 S 0 5000 20.00 D 0 D Employee Stock Option (Right to Buy) 0.66 2021-10-14 4 M 0 5000 0.00 D 2028-06-17 Class B Common Stock 5000 481498 D Class B Common Stock 2021-10-14 4 M 0 5000 0.66 A Class A Common Stock 5000 5000 D Class B Common Stock 2021-10-14 4 C 0 5000 0.00 D Class A Common Stock 5000 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. 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/ Trey Reilly, Attorney-in-Fact 2021-10-18