X0609 4 2026-04-01 0 0001637873 ACV Auctions Inc. ACVA 0001493307 ZERELLA WILLIAM false C/O ACV AUCTIONS INC. 640 ELLICOTT ST., SUITE 321 BUFFALO NY 14203 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-04-01 4 A 0 276276 0 A 1111500 D Common Stock 2026-04-01 4 F 0 4919 4.27 D 1106581 D Common Stock 2026-04-01 4 F 0 4482 4.27 D 1102099 D Common Stock 2026-04-01 4 F 0 3459 4.27 D 1098640 D Represents a restricted stock unit ("RSU") award. The RSUs will vest in twelve (12) substantially equal quarterly installments beginning July 1, 2026, subject to the Reporting Person's continuous service through each such date. These shares were withheld by the Issuer to cover the tax liability upon the vesting of a time-based restricted stock unit previously granted, and does not represent a discretionary sale by the reporting person. /s/ Michelle Webb, Attorney-in-Fact 2026-04-03