X0306 4 2021-11-12 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 2021-11-12 4 C 0 2000000 0.00 A 2000000 I See footnote Class A Common Stock 2021-11-12 4 S 0 2000000 19.45 D 0 I See footnote Class B Common Stock 2021-11-12 4 C 0 2000000 0.00 D Class A Common Stock 2000000 27815391 I See footnote 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 1,100,280 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX L.P. ("BVP IX"), 881,492 shares converted from Class B Common Stock to Class A Common Stock by Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst"), and 18,228 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 November 11, 2021 BVP IX, BVP IX Inst, and 15 Angels sold 1,100,280 shares, 881,492 shares, and 18,228 shares, respectively, of Class A Common Stock of ACV Auctions, in a single execution of $19.45 per share. After the transaction, BVP IX held 15,302,357 shares of Class B Common Stock, BVP IX Inst held 12,259,522 shares of Class B Common Stock and 15 Angels held 253,512 shares of Class B Common Stock. Deer IX & Co. Ltd. ("Deer IX Ltd.") is the general partner of Deer IX & Co. L.P. ("Deer IX LP", and together with Deer IX Ltd the "Deer IX Entities"), which is the general partner of the BVP IX Funds. The Deer IX Entities disclaims beneficial ownership of the securities held by BVP IX Funds, except to the extent of their pecuniary interest, if any, in such securities by virtue of his interest in Deer IX Ltd. and Deer IX LP and their indirect interest 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. 2021-11-16 /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. 2021-11-16 /s/ Scott Ring, Authorized Person, 15 Angels III LLC 2021-11-16 /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd., the General Partner of Deer IX & Co. L.P. 2021-11-16 /s/ Scott Ring, General Counsel, Deer IX & Co. Ltd. 2021-11-16