ACV Auctions stockholders elect directors, approve say-on-pay at 2023 annual meeting

Item 5.07 Submission of Matters to a Vote of Security Holders. On May 30, 2023, ACV Auctions Inc. (the “Company”) held its Annual Meeting of Stockholders (“Annual Meeting”). At the Annual Meeting, the Company’s stockholders voted on the four proposals set forth below. A more detailed description of each proposal is set forth in the Company’s proxy statement filed with the Securities and Exchange Commission on April 19, 2023. Proposal 1 – Election of Directors Brian Hirsch and Eileen A. Kamerick were each elected to serve as a Class II director of the Company’s Board of Directors until the 2026 Annual Meeting of Stockholders and until his or her successor is duly elected or until his or her earlier resignation or removal. The voting results were as follows: Nominee Votes For Votes Against Votes Withheld Broker Non-Votes Brian Hirsch 387,917,655 0 716,062 18,507,414 Eileen A. Kamerick 354,997,478 0 33,636,239 18,507,414

Proposal 3 – Approval of Frequency of Executive Compensation Votes The stockholders approved, on a non-binding, advisory basis, the frequency of one year for future non-binding, advisory votes to approve the compensation of our named executive officers. The voting results were as follows: Votes For 1 yr. Votes For 2 yr. Votes For 3 yr. Votes Withheld Broker Non-Votes 307,436,886 6,602 81,097,706 92,523 18,507,414

Proposal 4 - Ratification of the Appointment of Independent Registered Public Accounting Firm The stockholders ratified the appointment of Ernst and Young LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023. The voting results were as follows: Votes For Votes Against Votes Withheld Broker Non-Votes 407,087,402 47,391 6,338 0

Proposal 2 – Approval of Executive Compensation The stockholders approved, on a non-binding, advisory basis, the compensation of our named executive officers. The voting results were as follows: Votes For Votes Against Votes Withheld Broker Non-Votes 387,714,859 884,133 34,725 18,507,414