Form 4 Filing for George Chamoun

George Chamoun, Chief Executive Officer and Director of ACV Auctions Inc., reported a disposition of 10,582 shares of Common Stock on October 1, 2026. The shares were withheld by the Issuer to cover tax liabilities upon the vesting of a time-based restricted stock unit. The transaction price was $10.45 per share. Following this transaction, Chamoun directly owns 3,354,525 shares of Common Stock. This filing is a standard disclosure of insider transactions and is not considered a discretionary sale. Additional dispositions of 13,401, 21,281, and 9,422 shares were also made under similar circumstances on the same date, resulting in subsequent ownership of 3,341,124, 3,319,843, and 3,310,421 shares respectively.