Brian J. Radecki Acquires 27,500 Shares of ACV Auctions Inc. Common Stock

Brian J. Radecki, a director at ACV Auctions Inc., acquired 27,500 shares of the company's common stock on May 27, 2026. The acquisition was made through a restricted stock unit (RSU) award with a transaction price of $0.00 per share. Following this transaction, Radecki now owns 107,708 shares of common stock. The RSUs are subject to vesting conditions, including continuous service through the vesting date, which is the first anniversary of the grant date or the day preceding the next Annual Meeting, whichever comes first. This filing is Form 4, indicating a change in beneficial ownership.