SCHEDULE 13G/A 0001193125-24-036622 0001655213 XXXXXXXX LIVE 3 Class A Common Stock, $0.001 par value per share 12/31/2024 0001637873 ACV Auctions Inc. 00091G104 640 Ellicott Street Buffalo NY 14203 Rule 13d-1(d) Bessemer Venture Partners IX L.P. b E9 0 0 0 0 0 N 0 PN Bessemer Venture Partners IX Institutional L.P. b E9 0 0 0 0 0 N 0 PN Deer IX & Co. L.P. b 0 0 0 0 0 N 0 PN Deer IX & Co. Ltd. b E9 0 0 0 0 0 N 0 CO ACV Auctions Inc. 640 Ellicott Street, #321 Buffalo, New York 14203 This statement is being filed by the following persons with respect to certain shares of Class A Common Stock issuable upon conversion of Class B Common Stock (the "Shares" or the "Common Stock") of the Issuer. Bessemer Venture Partners IX L.P. ("BVP IX") and Bessemer Venture Partners IX Institutional L.P. ("BVP IX Inst" and together with BVP IX, the "Funds") directly own shares of Common Stock. (a) Deer IX & Co. Ltd. ("Deer IX Ltd"), the general partner of Deer IX & Co. L.P. ("Deer IX LP"); (b) Deer IX LP, the sole general partner of each of the Funds; (c) BVP IX, which directly owns 0 Shares; and (d) BVP IX Inst, which directly owns 0 Shares Deer IX Ltd, Deer IX LP, BVP IX and BVP IX Inst are sometimes individually referred to herein as a "Reporting Person" and collectively as the "Reporting Persons." c/o Bessemer Venture Partners 1865 Palmer Avenue; Suite 104 Larchmont, NY 10583 Deer IX Ltd - Cayman Islands Deer IX LP - Cayman Islands BVP IX - Cayman Islands BVP IX Inst - Cayman Islands Y Deer IX Ltd - 0 shares Deer IX LP - 0 shares BVP IX - 0 shares BVP IX Inst - 0 shares Deer IX Ltd - 0% Deer IX LP - 0% BVP IX - 0% BVP IX Inst - 0% Deer IX Ltd - 0 shares Deer IX LP - 0 shares BVP IX - 0 shares BVP IX Inst - 0 shares Deer IX Ltd - 0 shares Deer IX LP - 0 shares BVP IX - 0 shares BVP IX Inst - 0 shares Deer IX Ltd - 0 shares Deer IX LP - 0 shares BVP IX - 0 shares BVP IX Inst - 0 shares Deer IX Ltd - 0 shares Deer IX LP - 0 shares BVP IX - 0 shares BVP IX Inst - 0 shares N Y N As the general partner of Deer IX LP, which in turn is the general partner of the Funds, Deer IX Ltd may be deemed to beneficially own any Shares held directly by the Funds and have the power to direct the dividends from or the proceeds of the sale of such Shares. Y N Y Y Bessemer Venture Partners IX L.P. /s/ Scott Ring 02/14/2025 Bessemer Venture Partners IX Institutional L.P. /s/ Scott Ring 02/14/2025 Deer IX & Co. L.P. /s/ Scott Ring 02/14/2025 Deer IX & Co. Ltd. /s/ Scott Ring 02/14/2025