FORM10-Q (Mark One) xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period endedMarch 31, 2025 OR oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from __________ to __________ ACV Auctions Inc. Registrant’s telephone number, including area code:800553-4070_________________________________________________________ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities ExchangeAct of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subjectto such filing requirements for the past 90 days.Yesx NooIndicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required tosubmit such files).Yesx Noo Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reportingcompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and“emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filerxNon-accelerated filero Accelerated fileroSmaller reporting companyo If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.o Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yeso NoxAs of April30, 2025, there were171,064,794shares of the registrant's Class A common stock with a par value of $0.001, outstanding. Table of Contents PART I.FINANCIAL INFORMATION PART II. Item 1.Legal Proceedings Item 1A.Risk FactorsItem 2.Unregistered Sales of Equity Securities and Use of ProceedsItem 3.Defaults Upon Senior SecuritiesItem 4.Mine Safety DisclosuresItem 5.Other InformationItem 6.ExhibitsSignatures SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the SecuritiesAct of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or theExchange Act, about us and our industry that involve substantial risks and uncertainties. All statements other than statements ofhistorical facts contained in this Quarterly Report on Form 10-Q including statements regarding our future results of operations orfinancial condition, business strategy and plans and objectives of management for future operations, are forward-looking statements.Insome cases,you can identify forward-looking statements because they contain words such as“anticipate,”“believe,” •our expectations regarding our revenue, operating expenses and other operating results, including our key metrics andour ability to meet previously announced earnings guidance; •our ability to effectively manage our growth and expand our business; •our ability to acquire new customers and successfully retain existing customers and capture a greater share of wholesaletransactions from our existing customers; •our ability to increase usage of our marketplace platform and generate revenue from our value-added services; •anticipated trends, growth rates, and challenges in our business and in the markets in which we operate; •our ability to achieve or sustain our profitability; •future investments in our business, our anticipated capital expenditures and our estimates regarding our capitalrequirements; •the costs and success of our marketing efforts, and our ability to promote our brand; •the effects of macroeconomic and geopolitical conditions on our business, including the impact of changes in tradepolicies; •our reliance on key personnel and our ability to identify, recruit and retain skilled personnel, especially as we establishnew offerings; •our ability to compete effectively with existing competitors and new market entrants; •our ability to expand internationally; •our ability to identify, complete, and integrate acquisitions that complement and expand our reach and marketplaceplatform;•our decision to not declare or pay dividends for the foreseeable future;•our ability to comply or remain in compliance with laws and regulations that currently apply or become applicable to ourbusiness in the United States and other jurisdictions where we elect to do business; and•the growth rates of the markets in which we compete. You should not rely on forward-looking statements as predictions of future events. The