X0306 4 2021-12-02 0 0001637873 ACV Auctions Inc. ACVA 0001252022 GOODMAN ROBERT P C/O ACV AUCTIONS INC. 640 ELLICOTT STREET, #321 BUFFALO NY 14203 1 0 0 0 Class A Common Stock 2021-12-02 4 S 0 145702 21.67 D 283667 D Class A Common Stock 2021-12-03 4 S 0 49222 21.32 D 234445 D On December 2, 2021, the Reporting Person sold 145,702 shares of Class A Common Stock of the Issuer (the "Shares"). The Shares were sold in multiple executions at a price per share ranging from $21.00 to $22.07, with an average execution price per share of $21.67. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. On December 3, 2021, the Reporting Person sold 49,222 shares of Class A Common Stock of the Issuer (the "12/3 Shares"). The 12/3 Shares were sold in multiple executions at a price per share ranging from $21.00 to $22.07, with an average execution price per share of $21.32. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such individual executions. /s/ Robert P. Goodman 2021-12-06