Dear Fellow Stockholders,

On behalf of the Board of Directors, it is our pleasure to invite you to the Annual Meeting of Stockholders of ACV Auctions Inc. on May 30, 202329, 2024 at 4:00 p.m., Eastern Time. The Annual Meeting will be held in a virtual-only meeting format, via live webcast. Registration to attend the Annual Meeting is available at www.proxydocs.com/ACVA. The Notice of Annual Meeting of Stockholders and the Proxy Statement contain details of the business to be conducted during the Annual Meeting.

In 2022,2023, the ACV team continued to execute on our mission to digitally transform the automotive industry, resulting in solidstrong financial performance and continued market share gains, while delivering best-in-class services to our dealer and commercial partners. We also continued to invest in our ACV team, enabling us to broaden and deepen customer engagement onexpand our nationwide marketplace, and further enhance ACV’s differentiated data and technology moat. All of this was accomplished during another year of very challenging market dynamics in the automotive industry.

Highlights from 20222023 included:

Looking forward, we remain excited about the tremendous opportunity for ACV to address a large and complex industry that is still very early in its adoption of digital solutions. By executing on this opportunity, we expect to deliver significant shareholder value over time. Our strategy to deliver on ACV’s vision remains underpinned by three key pillars: Growth, Innovation and Scale.

We drive Growth by transforming the automotive market with the leading data-driven platform, creating the most trusted and efficient marketplace in the industry. Our Innovation engine delivers technology that extends ACV’s competitive moat and creates additional growth vectors in adjacent markets with an expanding suite of products and data services. Our proven business model delivers growth at Scale with attractive unit economics and long-term operating leverage.

ACV’s success would not be possible without the dedicated hard work and creativity of our people, the strategic relationships we’re building with our dealer and commercial partners, and the support and encouragement from our stockholders.

Our “people first” mindset drives everything we do, including how we recruit, develop and retain world class talent, and how we work together as “teammates”.“teammates.” Our dealersdealer and commercial partners are more than just our customers; they collaborate with us and provide invaluable input to our platform. Our team is trained to build long-term relationships, and our approach is centered around a mantra of “calm persistence” as a means for all team members to stay focused on the long game.

Lastly, we remain true to our beliefs. We will continue to deliver on our mission to bring transparency, trust and efficiency to the markets we serve. We will continue to keep the needs of our dealersdealer and commercial partners at the center of our decision-making. We will continue to pursue growth, which includes our investment in training, tools, technology and our product roadmap. We will continue to innovate and expand the breadth of our marketplace into adjacent markets, and expand our data-driven offerings, both organically and through targeted acquisitions. We will continue to invest in our people and culture.

Thank you for joining us on our journey.

GEORGE CHAMOUN Chief Executive Officer

April 19, 202317, 2024

Dear Stockholder:

You are cordially invited to attend the Annual Meeting of Stockholders (the “Annual Meeting”) of ACV Auctions Inc. (the “Company”) on Tuesday,Wednesday, May 30, 202329, 2024 at 4:00 p.m., Eastern Time. The Annual Meeting will be held in a virtual-only meeting format, via live webcast available at www.proxydocs.com/ACVA.

The Annual Meeting will be held for the following purposes:

These items of business are more fully described in the Proxy Statement accompanying this Notice.

We encourage you to attend the Annual Meeting online. The live webcast will provide you with the ability to participate in the Annual Meeting, vote your shares, and ask questions. In order to do so, you must register prior to the start of the meeting at www.proxydocs.com/ACVA. Upon completing your registration, you will receive further instructions via email, including your unique links that will allow you access to the Annual Meeting and will permit you to submit questions.

The record date for the Annual Meeting is April 3, 2023.2024. Please note that only stockholders of record at the close of business on that date are entitled to receive notice of, and to vote at, the Annual Meeting.

Please refer to the “Voting Information” section of the accompanying proxy statement for additional details.

By Order of the Board of Directors

LEANNE FITZGERALD Chief Legal Officer and Secretary   Buffalo, New York April 19, 202317, 2024

TABLE OF

CONTENTS

This Proxy Statement includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements may appear throughout this report, including the Letter from our Chief Executive Officer (or “CEO”), the Proxy Summary and Board and Executive Compensation. These forward-looking statements generally are identified by anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will” or “would” or the negative of these words or other similar terms or expression. Forward-looking statements are based on current expectations and assumptions that are subject to risks and uncertainties that may cause actual results to differ materially. We describe risks and uncertainties that could cause actual results and events to differ materially in “Risk Factors,” “Quantitative and Qualitative Disclosures aboutAbout Market Risk,”Risk” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of our Forms 10-K and 10-Q. We undertake no obligation to update or revise publicly any forward-looking statements, whether because of new information, future events, or otherwise.

FOR THE 20232024 ANNUAL MEETING OF STOCKHOLDERS

This proxy statement (this “Proxy Statement”) is furnished in connection with the solicitation by ACV Auctions Inc. (“we,” “us,” “our,” “ACV”,“ACV,” “ACV Auctions”,Auctions,” or the “Company”) on behalf of the Board of Directors (the “Board” or the “Board of Directors”) of proxies for use at the 20232024 Annual Meeting of Stockholders of the Company to be held virtually on Tuesday,Wednesday, May 30, 202329, 2024 at 4:00 p.m. Eastern Time, at www.proxydocs.com/ACVA (the “2023“2024 Annual Meeting”.).

IMPORTANT NOTICE REGARDING THE INTERNET AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 30, 202329, 2024

We have elected to provide access to our proxy materials over the Internetinternet under the Securities and Exchange Commission’s (“SEC”) “notice and access” rules. We believe electronic delivery will expedite the receipt of materials and will help lower costs and reduce the environmental impact of our annual meeting materials. Accordingly, we have sent you a Notice of Internet Availability of Proxy Materials (the “Notice”).

The Notice will provide instructions as to how stockholders may access and review the proxy materials, including the Notice of Annual Meeting of Stockholders, this Proxy Statement, and the 20222023 Annual Report on Form 10-K, on on the website referred to in the Notice or, alternatively, how to request that a copy of the proxy materials, including a proxy card, be sent to them by mail. The Notice will also provide voting instructions. Please note that, while our proxy materials are available at the website referenced in the Notice, and our Notice of Annual Meeting of Stockholders, this Proxy Statement and the 20222023 Annual Report on Form 10-K are are available on investors.acvauto.com, no other information contained on either website is incorporated by reference in or considered to be a part of this document.

We intend to mail the Notice on or about April 19, 202317, 2024 to all stockholders of record entitled to vote at the Annual Meeting. The proxy materials, including the Notice of Annual Meeting of Stockholders, this Proxy Statement, and the Annual Report on Form 10-K for for the year ended December 31, 20222023 will be made available to stockholders on www.proxydocs.com/ACVA on the same date.

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This Proxy Statement provides information for stockholders of ACV, as part of the solicitation of proxies by the Company and its Board of Directors from holders of the outstanding shares of the Company’s common stock for use at the 20232024 Annual Meeting.

In this section, we highlight certain information discussed in more detail in this Proxy Statement. As it is only a summary, we encourage you to read the entire Proxy Statement before voting.

VOTING INSTRUCTIONS

For voting instructions, please see the Voting Information section of this Proxy Statement beginning on page 4.

BUSINESS OVERVIEW

Our mission is to build and enable the most trusted and efficient digital marketplacesmarketplace for buying and selling used wholesale vehicles with transparency and comprehensive data that was previously unimaginable.

We provide a highly efficient and vibrant digital marketplace platform (“marketplace platform” or “marketplace”) for wholesale vehicle transactions and data services that offer transparent and accurate vehicle information to our customers. Our marketplace platform leverages data insights and technology to power our digital marketplace and data services, enabling our dealers and commercial partners to buy, sell, and value vehicles with confidence and efficiency. Our marketplace platform is also supported by remarketing centers in various locations throughout the United States. We strive to solve the challenges that the used automotive industry has faced for generations and provide powerful technology-enabled capabilities to our dealers and commercial partners who fulfill a critical role in the automotive ecosystem. We help dealers source and manage inventory and accurately price their vehicles as well as process payments, transfer titles, and manage arbitrations, and finance and arrange for transport of vehicles. Our marketplace platform encompasses:

We power our marketplace with technology-driven products and value-added services that address the entire transaction journey, ranging from pre-inspection scheduling to post-auction services including title transferability verification, payment processing, financing, and transportation, and facilitatealso assists in facilitating transactions both on and off our marketplace. Our comprehensive suite of products and services includeincludes ACV Transportation, ACV Capital, and our Customer Assurance (Go Green), which help create a seamless and frictionless buying and selling experience for our customers to further enhance our digital marketplace.customers. We also provide data services to our customers for use outside of our marketplace. Our True360 Reports are used by dealers and commercial partners to provide transparent vehicle information to potential buyers, including dealers as well as consumers. Our ACV MAX inventory management system enables dealers to accurately price their wholesale and retail inventory. More recently, we introduced ClearCar, an artificial intelligence-powered suite of tools for dealers to build and enhance their trade-in process. We believe the data and technology services enabled by our marketplace platform can bring value to the entire automotive industry and transform both wholesale and retail markets.

Our marketplace platform benefits from a continuousvirtuous cycle driven by our scaled, digital marketplace and the data and technology we leverage every day. More buyers and sellers engaging on our marketplace drives greater liquidity and greaterincreased vehicle selection, which leads to an overall better marketplace experience. This leads to greater scale drivingbenefits, producing more vehicle and market data that helps grow our data and technology moat. As we collect more vehicle and market data, we are able to provide greatermore efficiency to buyers and sellers through moreadditional products, which in turn drives greater marketplace supply and scale. For example, our data and technology enable economies of scale that improve our value-added transportation and financing services. As we continue to grow and offer more comprehensive and efficient services, our customers can further benefit from a more streamlined, simple, and consistent experience across the full used vehicle lifecycle. These reinforcing flywheel effects continuously improve our scaled, digital marketplace, remarketing centers, and data and technology for our customers, resulting in growth for our marketplace platform.

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QUORUM

A quorum of stockholders is necessary to hold a valid meeting. A quorum will be present if stockholders holding a majority of the voting power of the outstanding shares of common stock entitled to vote are present at the Annual Meeting by virtual attendance or represented by proxy. As of the close of business on April 3, 2023,2024, (“the Record Date”), there were 128,854,443147,537,639 shares of Class A common stock and 30,275,43017,347,458 shares of Class B common stock outstanding and entitled to vote.

Your shares will be counted towards the quorum only if you attend the Annual Meeting virtually, submit a valid proxy (or one is submitted on your behalf by your broker, bank or other nominee), or if you vote online during the Annual Meeting. Abstentions and broker non-votes will will be counted towards the quorum requirement. If there is no quorum, the holders of a majority of the voting power of shares present at the Annual Meeting or represented by proxy may adjourn the Annual Meeting to another date.

RECORD DATE AND STOCKHOLDERS LIST

The Board has fixed the close of business on April 3, 20232024 as the Record Date for the determination of stockholders entitled to notice of, and to vote at, the Annual Meeting. A list of stockholders of record entitled to vote at the Annual Meeting will be available for inspection by any stockholder, for any purpose germane to the meeting, during normal business hours, for a period of 10 days prior to and including the date of the Annual Meeting, at our corporate headquarters located at 640 Ellicott St., Suite 321, Buffalo, NY 14203.

STOCKHOLDERS ELIGIBLE TO VOTE

You are entitled to vote your shares at the Annual Meeting if you held your shares as of the close of business on the Record Date, April 3, 2023.2024. Each holder of shares of our Class A common stock will have one vote per share of Class A common stock held as of the Record Date, and each holder of shares of our Class B common stock will have ten10 votes per share of Class B common stock held as of the Record Date. Holders of Class B common stock hold the majority of the voting power of our common stock. The holders of the shares of our Class A common stock and Class B common stock will vote as a single class on all matters described in this proxy statement.Proxy Statement.

A list of our record stockholders as of the close of business on the Record Date is held on www.proxydocs.com/ACVA and will be made available to stockholders during the virtual Annual Meeting.

HOW TO VOTE

How you vote will depend on whether you are the stockholder of record or whether you are the beneficial owner of shares held in “street name”.name.”

If, on the Record Date, your shares were registered directly in your name with our transfer agent, Computershare Trust Company, N.A., then you are a stockholder of record. As a stockholder of record, you may vote online during the Annual Meeting or by proxy in advance. Whether or not you plan to attend the Annual Meeting, we urge you to vote your shares. You may authorize that your shares be voted at the Annual Meeting in one of the following ways:

If, on the Record Date, your shares were held not in your name, but rather in an account at a brokerage firm, bank or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice is being forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker, bank or other agent regarding how to vote the shares in your account, but you must provide such instructions by the deadline provided in the materials provided by your broker bank or other agent. You are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may be instructed to obtain a legal proxy from your broker, bank or other nominee and to submit a copy in advance of the meeting. Further instructions will be provided to you as part of your registration process.

If you are a beneficial owner and do not instruct your broker, bank or other agent how to vote your shares, the question of whether your broker or nominee will still be able to vote your shares depends on whether, pursuant to stock exchange rules, the particular proposal is deemed to be a “routine” matter.

Brokers and nominees can use their discretion to vote “uninstructed” shares with respect to matters that are considered to be “routine,” but not with respect to “non-routine”“non-routine” matters. matters. Under applicable rules and interpretations, “non-routine”“non-routine” matters matters are matters that may substantially affect the rights or privileges of stockholders, such as mergers, stockholder proposals, elections of directors (even if not contested), executive compensation, and certain corporate governance proposals, even if management supported. Accordingly, your broker or nominee may vote your shares on Proposal 4.3. Your broker or nominee, however, may not vote your shares on Proposal 1 Proposal 2, or Proposal 32 without your instructions. Such an event would result in a “broker non-vote”.“broker non-vote.” Please Please instruct your bank, broker or other agent to ensure that your vote will be counted. Please see “Counting of Votes” for additional information regarding the impact of broker non-votes on on the proposals.

If you vote via the Internetinternet or by telephone, your electronic vote authorizes the named proxies in the same manner as if you signed, dated and returned your proxy card. If you vote via the Internetinternet or by telephone, do not return your proxy card.

Even if you plan to attend the Annual Meeting, we recommend that you submit your proxy or voting instructions in advance of the Annual Meeting as described above so that your vote will be counted if you later decide not to attend or are unable to attend the Annual Meeting.

CHANGING OR REVOKING YOUR VOTE

If you are a holder of record, you may revoke your proxy at any time before it is voted at the Annual Meeting by delivering written notice of revocation to the Secretary of the Company, by submitting a subsequently dated proxy by mail, telephone or the Internetinternet in the manner described above under “How to Vote,” or by attending the Annual Meeting and voting online during the Annual Meeting. Your most recent vote by proxy card, telephone, or internet or your vote online during the Annual Meeting is the one that is counted. Attendance at the Annual Meeting will not itself revoke an earlier submitted proxy. If you hold your shares in street name, you must follow the instructions provided by your broker, bank or nominee to revoke your voting instructions, or if you have obtained a legal proxy from your broker, bank or other nominee giving you the right to vote your shares at the Annual Meeting, by attending the Annual Meeting and voting in person virtually.

CHOOSING NOT TO VOTE OR VOTING WITH A BLANK PROXY CARD

If you are a stockholder of record and do not vote through the internet, by telephone, by completing the proxy card that may be delivered to you or online during the Annual Meeting, your shares will not be voted.

If you return a signed and dated proxy card or otherwise vote without marking voting selections, your shares will be voted in accordance with the recommendations of our boardBoard of directors:Directors: “FOR” the election of each of the twothree nominees for director;director named in this Proxy Statement; “FOR” the approval, on a non-binding, advisory advisory basis, of the compensation of our named executive officers, “1 Year” for the approval, on a non-binding, advisory basis, of the frequency of future non-binding, advisory votes to approve the compensation of our named executive officers, and “FOR” the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2023.2024. If any other matter is properly presented at the Annual Meeting, the persons acting as proxies will vote your shares using histheir best judgment.

COUNTING OF VOTES

Votes will be counted by the inspector of election appointed for the Annual Meeting, who will separately count, for Proposal 1, votes “FOR,” “WITHHOLD” and broker non-votes; with with respect to Proposal 2, votes “FOR,” “AGAINST,” abstentions and broker non-votes; and, with respect to Proposal 3, votes “One Year,” “Two Years,” “Three Years” and abstentions; and, with respect to Proposal 4, votes “FOR,” “AGAINST” and abstentions. Broker non-votes on on Proposals 1 2 and 32 will have no effect and will not be counted towards the vote total for these proposals.

Votes withheld on Proposal 1 and abstentions on Proposals 2 3 and 43 will have no effect and will not be counted towards the vote total for these proposals.

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The following table summarizes the minimum vote needed to approve each proposal and the effect of abstentions and broker non-votes.

VOTING RESULTS

Preliminary voting results will be announced at the Annual Meeting. In addition, final voting results will be published in a current report on Form 8-K that that we expect to file within four business days after the Annual Meeting. If final voting results are not available to us in time to file a Form 8-K within within four business days after the Annual Meeting, we intend to file a Form 8-K to to publish preliminary results and, within four business days after the final results are known to us, file an additional Form 8-K to to publish the final results.

STOCKHOLDER PROPOSALS AND DIRECTOR NOMINATIONS FOR THE 20242025 ANNUAL MEETING

To be considered for inclusion in next year’s proxy materials, your proposal must be submitted in writing by December 21, 2023,18, 2024, to our Secretary at 640 Ellicott Street, #321, Buffalo, New York 14203, Attention: Secretary.

Pursuant to our amended and restated bylaws, if you wish to submit a proposal (including a director nomination) at the 20242025 Annual Meeting of Stockholders that is not to be included in next year’s proxy materials, you must do so not later than the close of business on March 1, 2024February 28, 2025 nor earlier than the close of business on January 31, 2024.29, 2025. However, if the date of our 20242025 Annual Meeting of Stockholders is not between April 30, 202429, 2025 and June 29, 2024,28, 2025, to be timely, notice by the stockholder must be received (A) not earlier than the close of business on the 120th day prior to the 20242025 Annual Meeting of Stockholders and (B) not later than the close of business on the later of the 90th day prior to the 20242025 Annual Meeting of Stockholders or the tenth10^th day following the day on which public announcement of the date of the 20242025 Annual Meeting of Stockholders is first made. You are also advised to review our amended and restated bylaws, which contain additional requirements about advance notice of stockholder proposals and director nominations.

PROXY SOLICITATION COSTS

We will pay for the entire cost of soliciting proxies. In addition to these proxy materials, our directors and employees may also solicit proxies in person or by telephone, whoand will not be paid any additional compensation for soliciting proxies. We may also reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners.

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INFORMATION REGARDING DIRECTOR NOMINEES AND CURRENT DIRECTORS

Our Board currently consists of seven members and is divided into three classes. Each class consists, as nearly as possible, of one-third of of the total number of directors, and each class has a three-year term. At each Annual Meeting of stockholders, the successors to directors whose terms then expire will be elected to serve from the time of election until the third annual meeting following their election.

Set forth below is biographical information for the director nominees and each director whose term of office will continue after the Annual Meeting. This includes information regarding each director’s experience, qualifications, attributes or skills that led our Board to recommend them for board service.

Nominees for Election at the 2023 Annual Meeting of Stockholders (Class II)

Ms. Castillo, Mr. Jones and Mr. Radecki are each currently members of our Board and have been nominated for reelection to serve as a Class III director. Each of these nominees has agreed to stand for reelection at the Annual Meeting. Our management has no reason to believe that any nominee will be unable to serve. If elected at the Annual Meeting, each of these nominees would serve until the Annual Meeting of Stockholders to be held in 2027 and until his or her successor has been duly elected, or if sooner, until the director’s death, resignation or removal.

Directors are elected by a plurality of the votes of the holders of shares present by virtual attendance or represented by proxy and entitled to vote on the election of directors. Accordingly, the three nominees receiving the highest number of “FOR” votes will be elected. Shares represented by executed proxies will be voted, if authority to do so is not withheld, for the election of the three nominees named above. If any nominee becomes unavailable for election as a result of an unexpected occurrence, shares that would have been voted for that nominee will instead be voted for the election of a substitute nominee proposed by us.

Directors Continuing in Office Until the 2025 Annual Meeting of Stockholders (Class I)

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Directors Continuing in Office Until the 2026 Annual Meeting of Stockholders (Class II)

INDEPENDENCE OF OUR BOARD OF DIRECTORS

Our Class A common stock is listed on the Nasdaq Global Select Market (“Nasdaq”). Under the Nasdaq listing standards and the rules of the SEC, including Rule 10A-3(b)(1) under under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), a majority of the members of our Board must qualify as “independent,” as affirmatively determined by our Board.

After review in accordance with the independence standards of Nasdaq and the SEC of all relevant identified transactions or relationships between each director, and any of his or her family members, and ACV, our senior management and our independent auditors, our Board has affirmatively determined that the following six of our seven directors are independent directors within the meaning of the applicable Nasdaq listing standards: Ms. Castillo, Mr. Goodman, Mr. Hirsch, Mr. Jones, Ms. Kamerick and Mr. Radecki. The Board has also determined that each member of our standing committees is independent within the meaning of both Nasdaq’s and the SEC’s director independence standards. In making these determinations, each of our directors provided information regarding whether such director, or any member of his or her immediate family, had a direct or indirect material interest in any transaction involving ACV, or received personal benefits outside the scope of such person’s normal consideration. Mr. Chamoun is not independent due to his position as our Chief Executive Officer.

In making this determination, our Board considered the applicable listing standards and rules and the current and prior relationships that each non-employee director director has with our companyCompany and all other facts and circumstances our Board deemed relevant in determining their independence, including their beneficial ownership of our capital stock and the transactions involving them described in “Transactions with Related Persons.”

There are no family relationships among any of our directors or executive officers.

BOARD LEADERSHIP STRUCTURE

Our current Board has an independent chair, Mr. Goodman. Our Corporate Governance Guidelines provide our Board of Directors with flexibility to select the appropriate leadership structure based on the specific needs of our business and the best interests of our stockholders. If the Chairperson of the Board is not independent, the Board may appoint a Lead Independent Director upon the recommendation of the Nominating & Corporate Governance Committee, which will be a director who qualifies as independent under the applicable rules of Nasdaq.

COMPOSITION AND DIVERSITY OF OUR BOARD

Our Board believes that a diverse board is better able to effectively oversee our management and strategy, and position ACV to deliver long-term value for our stockholders. Our Board’s goal is to maintain a well-balanced composition that combines a variety of experiences, backgrounds, skills, and perspectives that enable the Board to guide ACV effectively in the pursuit of our strategic objectives. We seek to assemble a board that possesses the appropriate balance of professional and industry knowledge, financial expertise, diversity and high-level management experience necessary to oversee and direct our business.

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To that end, we have identified and evaluated nominees in the broader context of the Board’s overall composition, with the goal of recruiting members who possess relevant expertise and experience upon which to be able to offer advice and guidance to management, have sufficient time to devote to the affairs of ACV, demonstrate excellence in their field, have the ability to exercise sound business judgment, have experience as a board member or executive officer of another publicly held company, and have the commitment to rigorously represent the long-term interests of our stockholders. To further provide a mix of experience and perspective on the Board, we also take into account diversity (including diversity of gender, ethnic background and country of origin), skills and such other factors that we deem appropriate to maintain a balance of knowledge, experience and capability on the Board.

BOARD DIVERSITY

ROLE OF THE BOARD OF DIRECTORS IN RISK OVERSIGHT

One of the key functions of our Board is informed oversight, rather than direct management of ourthe risk management process asthat our management is responsible for. As such, our Board has an active role, as a whole and also at the committee level, in overseeing management of Companycompany risk. Our boardBoard administers this oversight function directly through the Board as a whole, as well as through various standing committees of the Board that address risks inherent in their respective areas of oversight. In particular, our Board is responsible for monitoringmonitors and assessingassesses strategic risk exposure, including a determination of the nature and leveldegree of risk appropriate for our company.Company faces.

While our full Board has overall responsibility for risk oversight, it has delegated oversight of certain risks to its committees. Our Audit Committee oversees management of our financial risk exposures and the steps our management has taken to monitor and control these exposures. Furthermore, our Audit Committee oversees risks associated with cyber and information security, competition and regulation, conflicts of interest, and mitigation of such risk.risks. Our Audit Committee also oversees the performance of our internal audit function. The Compensation Committee of the Board is responsible for overseeing the management of risks relating to and arising from the Company’s compensation plans and arrangements, which includes evaluating succession plans for our executive officers. The Nominating & Corporate Governance Committee oversees the composition of our Board and development of our directors, oversees the management of risks relating to environmental, social and governance (“ESG”) policies, practices, disclosures and reporting, and evaluates the adequacy of our corporate governance practices and reporting.

At periodic meetings of our Board and its committees, management reports to and seeks guidance from our Board and its committees with respect to the most significant risks that could affect our business, such as legal risks, cybersecurity, and financial, tax and audit-related risks. In addition, among other matters, management provides our Audit Committee periodic reports on our risk programs and investment policy and practices.

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The following table provides membership information for each of the standing committees of our Board:

 C  Chair

 M  Member

 F   Financial Expert and Member

Our Board has determined that each member of each standing committee meets the applicable Nasdaq rules and regulations regarding “independence” and each member is free of any relationship that would impair his or her individual exercise of independent judgment with regard to us.

BOARD COMMITTEES

Our Board has three standing committees: the Audit Committee, the Compensation Committee, the Nominating and Corporate Governance Committee.

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COMPENSATION COMMITTEE PROCESSES AND PROCEDURES

Our Compensation Committee generally meets quarterly and with greater frequency if necessary. The Compensation Committee also acts periodically by unanimous written consent in lieu of a formal meeting. The agenda for each meeting is usually developed by the chairpersonChairperson of the Compensation Committee, in consultation with management. The Compensation Committee meets regularly in executive session. However, from time to time, various members of management and other employees as well as outside advisors or consultants may be invited by the Compensation Committee to make presentations, to provide financial or other background information or advice or to otherwise participate in Compensation Committee meetings. Our Chief Executive Officer may not participate in, or be present during, any deliberations or determinations of the Compensation Committee regarding his compensation.

The charter of the Compensation Committee grants the Compensation Committee full access to all books, records, facilities and personnel of ACV Auctions.ACV. In addition, under the charter, the Compensation Committee has the authority to obtain, at our expense, advice and assistance from compensation consultants and internal and external legal, accounting or other advisors and other external resources that the Compensation Committee considers necessary or appropriate in the performance of its duties. The Compensation Committee has direct responsibility for the oversight of the work of any consultants or advisersadvisors engaged for the purpose of advising the Compensation Committee. In particular, the Compensation Committee has the authority to retain compensation consultants to assist in its evaluation of executive and director compensation, including the authority to approve the consultant’s reasonable fees and other retention terms.

During the past fiscal year, afterAfter taking into consideration the six factors prescribed by the SEC and Nasdaq that bear upon the determination of an advisor as independent, the Compensation Committee again engaged Compensia, Inc. (“Compensia”) as its compensation consultants. The Compensation Committee requested that Compensia:

As part of its engagement, Compensia was requested by the Compensation Committee to develop a comparative group of companies and to perform analyses of competitive performance and compensation levels for that group. Compensia ultimately developed recommendations that were presented to the Compensation Committee for its consideration and approved, which is further discussed in our Compensation Discussion & Analysis section.

Generally, the Compensation Committee’s process for determining executive compensation comprises two related elements: the determination of compensation levels and the establishment of performance objectives for the current year. For executive officers (including our NEOs, other than our Chief Executive Officer), the Compensation Committee solicits and considers evaluations and recommendations submitted to the committee by our Chief Executive Officer. The Compensation Committee discusses and recommends proposed compensation for the Chief Executive Officer to our boardBoard of directors,Directors, which then approves the Chief Executive Officer’s compensation and equity awards. For all executives and directors, as part of its deliberations, the Compensation Committee may review and consider, as appropriate, materials such as financial reports and projections, operational data, executive and director stock ownership information, company stock performance data, analyses of historical executive compensation levels and current company-wide compensation levels and recommendations of the Compensation Committee’s compensation consultant, including analyses of executive and director compensation paid at other companies identified by the consultant.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

No member of our Compensation Committee is currently one of our officers or employees. None of our executive officers currently serves, or has served during the last year, as a member of the board of directors or Compensation Committeecompensation committee of any entity that has one or more executive officers serving as a member of our boardBoard of directorsDirectors or Compensation Committee.

NOMINATING AND CORPORATE GOVERNANCE COMMITTEE PROCESSES AND PROCEDURES

In the case of an incumbent director whose term of office is set to expire, the Nominating and Corporate Governance Committee reviews such director’s overall service to ACV during his or her term, including the number of meetings attended, level of participation, quality of performance and any other relationships and transactions that might impair such director’s independence. In the case of new director candidates, our Nominating and Corporate Governance Committee also evaluates whether the nominee is independent for Nasdaq purposes, based upon applicable Nasdaq listing standards, applicable SEC rules and regulations and the advice of counsel, if necessary. To identify qualified candidates for membership on the Board, our

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Nominating and Corporate Governance committee considers criteria approved by the Board, including consideration of the potential conflicts of interest, director independence and other requirements. Our Nominating and Corporate Governance Committee conducts any appropriate and necessary inquiries into the backgrounds and qualifications of possible candidates

ENVIRONMENTAL, SOCIAL AND GOVERNANCE HIGHLIGHTS

We aim to provide trust and transparency in everything we do, including with respect to our teammates, our customers, our community, and the environment. We continue to invest in betteringimproving our performance with respect to each of these important constituencies,topics, with a focus on maintaining the highest standards of business conduct and ethics. Environmental consciousness, social responsibility, ethics, diversity and inclusion, and responsible corporate governance are core to what we do.

In 2022, we expanded the role of our Nominating and Corporate Governance Committee to include responsibility for considering and recommending to the Board or taking action relating to ESG policies, practices, disclosures, and reporting. Under the oversight of the Nominating and Governance Committee, in 2022, we established a management-level committee devoted to driving ESG improvements acting2023, under the oversight of our Nominating and Corporate Governance Committee.Committee, we determined the best ways we can continue to incorporate the tenets of our ESG program into our daily operating standards. What follows are some of our areas of focus in the ESG efforts we have undertaken:focus:

SOCIAL

OurACV teammates make this company what it is. They are the very foundation is our people.of all that we do. We respect and listen to our people,teammates, and we care for their well-being.

Diversity, Equity, and Inclusion:

At ACV, we believe in an inclusive culture in which every individual is welcomed and empowered to celebrate their true selves. We view the principles of diversity, equity, and inclusion as transformative building blocks that result in an ever-evolving organization where we are able to create a universally welcoming environment for our teammates, customers, and the communities in which we operate and with whom we engage. We are committed to recruiting, retaining and developing high performing,high-performing, innovative and engaged employees with diverse backgrounds and experiences. Our DE&I program

Culture and Wellness:

We are proud of our corporate culture which is built on three pillars:centered around providing trust and transparency, and our efforts in this space places us in a better position to use these values to drive better business results. In recognition of our corporate culture, we won the award for “Best Tech Culture for Large Company” at the 2023 Betas Technology Awards and Showcase.

ACV regularly offers wellness programs including physical fitness challenges, financial wellness educational courses, and meditation classes to address the overall wellness of our teammates. We provide financially and family-friendly health care options including generous parental leave, telehealth resources, and country-wide health insurance.

Community:

Giving back to the community is a key component of our culture. In particular, we offer company-driven initiatives to support local charities and encourage our teammates to create their own charitable initiatives with teammates in their area. For example, in recent years:

These and many more charitable events keep our teammates engaged with and improving our communities.

Culture and Wellness:

We are proud of our corporate culture which is centered around providing trust and transparency, and our efforts in this space places us in a better position to use these values to drive better business results. We have been identified as one of the best workplaces in New York State by Great Place to Work and Fortune magazine.

ACV regularly offers wellness programs including physical fitness challenges, financial wellness educational courses, and meditation classes to address the overall wellness of our teammates. We provide financially and family-friendly health care options including generous parental leave, telehealth resources, and country-wide health insurance.

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GOVERNANCE

Code of Business Conduct and Ethics

Our Board has adopted a written code of business conduct and ethics that applies to all of our employees, officers and directors. The full text of our code of business conduct and ethics is available on the investor relations section of our website, which is located at https://investors.acvauto.com. We are committed to maintaining high standards of financial integrity, open communication, and a workplace environment where employees can raise concerns free of harassment, discrimination or retaliation. We maintain a formal whistleblower policy which describes the means by which employees, directors and officers can report suspected violations of our code of business conduct and ethics. We conduct our business and have put policies in place to ensure our teammates act under the guiding principles of integrity and fair dealing in all that we do.

We believe our Board of Directors’ responsibility is to fulfill its fiduciary duties and otherwise to exercise business judgment in the best interests of the Company and its stockholders. To guide itself in exercising its responsibilities, the Board has adopted corporate governance guidelines which are designed to give directors a flexible framework for effectively pursuing the Company’s objectives for the benefit of its stockholders. The corporate governance guidelines set forth the practices the Board intends to follow with respect to board composition and selection, the role of the Board of Directors, board meetings and involvement of senior management, Chief Executive Officer performance evaluation, succession planning, and board committees and compensation.

HEDGING AND PLEDGING POLICIES

Our Board has adopted an Insider Trading Policy, which prohibits hedging or monetization transactions by employees, Directors, other applicable members of management and designated consultants, including through the use of financial instruments such as prepaid variable forward contracts, equity swaps, collars, and exchange funds. In addition, our Insider Trading Policy prohibits trading in derivative securities related to our Class A common stock, which includeincludes publicly traded call and put options, engaging in short selling of our Class A common stock, purchasing our Class A common stock on margin or holding it in a margin account and pledging our shares of Class A common stock as collateral for a loan.

In accordance with the requirements of Section 14A of the Exchange Act, we are providing our stockholders the opportunity to vote to approve, on a non-binding, advisory basis, the compensation of our named executive officers (as disclosed under “Executive Compensation—Compensation Discussion and Analysis,” the tables included under the heading “Executive Compensation” and the accompanying narrative).

You are encouraged to review the section titled “Executive Compensation” and, in particular, the section titled “Executive Compensation—Compensation Discussion and Analysis” in this proxy statement,Proxy Statement, which provide a comprehensive review of our executive compensation program and its elements, objectives and rationale.

The vote on this resolution is not intended to address any specific element of compensation, rather the vote relates to the compensation of our named executive officers in its totality, as described in this proxy statementProxy Statement in accordance with the compensation disclosure rules of the SEC.

In accordance with Section 14A of the Exchange Act rules, stockholders are asked to approve the following non-binding resolution:

“RESOLVED, that the Company’s stockholders hereby approve, on a non-binding, advisory basis, the compensation of the Company’s named executive officers, as disclosed in the Company’s proxy statement for the ACV Auctions Annual Meeting of Stockholders to be held on May 30, 2023,29, 2024, pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the compensation tables and the accompanying narrative.”

The approval of this non-binding proposal requires the affirmative vote of the holders of shares representing a majority of the voting power of the outstanding shares of common stock present by virtual attendance or represented by proxy and voting affirmatively or negatively at the Annual Meeting.

Since this proposal is an advisory vote, the result will not be binding on our boardBoard of directorsDirectors or our compensation committee.Compensation Committee. However, our boardBoard of directorsDirectors values our stockholders’ opinions, and our boardBoard of directorsDirectors and the compensation committeeCompensation Committee will take into account the outcome of the advisory vote when considering future executive compensation decisions.

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Section 14A of the Exchange Act provides that every six years we must provide stockholders an opportunity to vote, on a non-binding, advisory basis, for their preference on how frequently we should seek future non-binding, advisory votes to approve the compensation of our named executive officers (such as the one described in Proposal No. 2 above). Specifically, stockholders may indicate whether they would prefer these advisory resolutions on named executive officer compensation to be presented for stockholder approval every one, two or three years.

Our board of directors believes at this time that an annual frequency is appropriate for ACV. The board of directors believes that an annual vote on named executive officer compensation provides stockholders with the opportunity to provide timely and direct input to the board of directors and the compensation committee about our executive compensation philosophy, policies and practices as disclosed in the proxy statement each year. The board of directors believes that an annual vote is therefore consistent with our efforts to engage in an ongoing dialogue with our stockholders on executive compensation and corporate governance matters. The board of directors will continue to evaluate the appropriate frequency for the stockholder executive compensation vote.

Please note that stockholders are not voting to approve or disapprove the recommendation of the board of directors with respect to this proposal. Instead, the proxy card provides four choices: a one, two or three year frequency or stockholders may abstain from voting on the proposal. The option that receives the highest number of votes of the holders of shares of common stock present at the meeting (by virtual attendance) or by proxy and entitled to vote thereon will be deemed to be the frequency preferred by our stockholders.

Since this proposal is an advisory vote, the result will not be binding on our board of directors. As such, the results of the vote will not be construed to create or imply any change to the fiduciary duties of our board of directors. Our board of directors may decide that it is in the best interests of ACV and our stockholders to hold a non-binding, advisory vote on our named executive officer compensation more or less frequently than the option approved by our stockholders. However, our board of directors values our stockholders’ opinions, and our board of directors and the compensation committee will take into account the outcome of the advisory vote when determining how often we should submit to stockholders future “say-on-pay” votes. We expect that the next stockholder vote on the frequency of non-binding, advisory votes on named executive officer compensation will occur at our 2029 annual meeting of stockholders.

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Pre-Approval Policies and Procedures

The Audit Committee has adopted a policy and procedures for the pre-approval of audit and non-audit services rendered by our independent registered public accounting firm, Ernst & Young LLP. The policy generally permits pre-approval of specified services in the defined categories of audit services, audit-related services, tax services and permitted non-audit services. Pre-approval may also be given as part of the Audit Committee’s approval of the scope of the engagement of the independent registered public accounting firm or on an individual, explicit, case-by-case basis before the independent registered public accounting firm is engaged to provide each service. The pre-approval of services may be delegated to one or more of the Audit Committee’s members, but any pre-approval decision made pursuant to such delegation must be reported to the full audit committeeAudit Committee at its next scheduled meeting.

The Audit Committee has determined that the rendering of services other than audit services by Ernst & Young LLP is compatible with maintaining the principal accountant’s independence.

The Audit Committee oversees the accounting and financial reporting processes of the Company, including establishing, assessing, and maintaining internal controls and audits of the financial statements of the Company on behalf of the Board. The Company’s management has primary responsibility for the financial statements and for assessing and maintaining effective internal control over financial reporting.

The Audit Committee acts pursuant to a written charter. A copy of the charter is available under the “Corporate Governance” section of the “Investor Relations” page of the Company’s website, www.acvauto.com. The Audit Committee is comprised solely of independent directors as defined by the Nasdaq listing standards and Rule 10A-3 of the Exchange Act.

The Audit Committee has reviewed and discussed the audited financial statements for the fiscal year ended December 31, 20222023 with our management. The Audit Committee has also reviewed and discussed with Ernst & Young LLP, our independent registered public accounting firm, the matters required to be discussed by Auditing Standard No. 1301, Communications with Audit Committees, as adopted by the Public Company Accounting Oversight Board (“PCAOB”). The Audit Committee has also received the written disclosures and the letter from Ernst & Young LLP required by applicable requirements of the PCAOB regarding the independent accountants’ communications with the Audit Committee concerning independence and has discussed with Ernst & Young LLP the accounting firm’s independence.

Based on the foregoing, the Audit Committee has recommended to our Board, and the Board has approved, that the audited financial statements be included in our Annual Report on Form 10-K for the fiscal year ended December 31, 20222023 and filed with the SEC.

Respectfully submitted by the Audit Committee of the Board of Directors

Eileen Kamerick, Chair

René Jones

Brian Radecki

The material in this report is not “soliciting material,” is not deemed “filed” with the Commission and is not to be incorporated by reference in any filing of ACV Auctions under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

20222023 DIRECTOR COMPENSATION

The following table sets forth information regarding compensation earned by or paid to our non-employee directors directors for the year ended December 31, 2022:2023:

Mr. Chamoun, our Chief Executive Officer, is also a member of our Board but does not receive any additional compensation for his service as a director. See the section titled “Executive Compensation” for more information regarding the compensation earned by Mr. Chamoun.