X0306 4 2022-12-13 0 0001637873 ACV Auctions Inc. ACVA 0001655213 Bessemer Venture Partners IX L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT NY 10538 0 0 1 0 0001624149 Bessemer Venture Partners IX Institutional L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT NY 10538 0 0 1 0 0001772240 15 Angels III LLC C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 0 0 1 0 0001655219 Deer IX & Co. L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT NY 10538 0 0 1 0 0001655220 Deer IX & Co. Ltd. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVE., SUITE 104 LARCHMONT NY 10538 0 0 1 0 Class A Common Stock 2022-12-13 4 C 0 1007160 0.00 A 1007160 I See footnotes Class A Common Stock 2022-12-13 4 S 0 1007160 9.00 D 0 I See footnote Class B Common Stock 2022-12-13 4 C 0 1007160 0.00 D Class A Common Stock 1007160 18845152 I See footnotes Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date. Represents 554,079 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 443,902 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 9,179 shares converted from Class B Common Stock to Class A Common Stock by 15 Angels III LLC. ("15 Angels" and together with BVP IX and BVP IX Inst, the "BVP IX Funds"). On December 13, 2022 BVP IX, BVP IX Inst, and 15 Angels sold 554,079, 443,902, and 9,179 shares, respectively, of Class A Common Stock of ACV Auctions, Inc. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.20, 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 this footnote. After the reported transaction, BVP IX, BVP IX Inst, and 15 Angels own 10,367,471 shares, 8,305,924 shares and 171,757 shares, respectively, of Class B Common Stock. Deer IX & Co. Ltd. ("Deer Ltd.") is the general partner of Deer IX & Co. L.P. ("Deer L.P."), which is the general partner of the BVP IX Funds. Deer Ltd. and Deer L.P. disclaim beneficial ownership of the securities held by the BVP IX Funds, and this report shall not be deemed an admission that Deer Ltd. and Deer L.P. are the beneficial owners of such securities, except to the extent of their pecuniary interest therein, if any, by virtue of their direct and indirect general partner interests in the BVP IX Funds. /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P., the General Partner of Bessemer Venture Partners IX L.P. 2022-12-15 /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P., the General Partner of Bessemer Venture Partners IX Institutional L.P. 2022-12-15 /s/ Scott Ring, Authorized Person, 15 Angels III LLC 2022-12-15 /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P. 2022-12-15 /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd. 2022-12-15