FIRST ADVANTAGE CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒ Definitive Proxy Statement

☐ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

First Advantage Corporation

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

April 24, 2026

Dear Stockholder:

Please join us for First Advantage Corporation’s Annual Meeting of Stockholders to be held on Friday, June 5, 2026, at 2:00 p.m., Eastern Time. The Annual Meeting will be held in a virtual meeting format only and will be conducted via live audio webcast. You will be able to attend the Annual Meeting online, vote your shares electronically and submit your questions during the Annual Meeting via a live audio webcast by visitingwww.proxydocs.com/FA and entering the control number shown on your Notice of Internet Availability of Proxy Materials, proxy card, or the instructions that accompanied your proxy materials.

As permitted by the rules of the Securities and Exchange Commission (the “SEC”), we are furnishing our proxy materials to stockholders primarily over the Internet. We believe this process expedites receipt, reduces costs and conserves natural resources. We are sending a Notice of Internet Availability of Proxy Materials and making the Proxy Materials available on the Internet on or about April 24, 2026 to our stockholders of record at the close of business on April 7, 2026. The notice contains instructions on how to access our Proxy Statement and 2025 Annual Report and vote online. If you would like to receive a printed copy of our proxy materials, please follow the instructions for requesting such materials included in the notice.

We urge you to read the accompanying materials regarding the matters to be voted on at the meeting and to submit your voting instructions by proxy. The Board of Directors recommends that you vote “FOR” each of the nominees listed in the Proxy Statement, “FOR” the ratification of Deloitte & Touche LLP, and “FOR” the approval of, on an advisory (non-binding) basis, the compensation of our named executive officers.

Whether or not you plan to attend the meeting, your vote is important to us. You may vote your shares by proxy on the Internet, by telephone or by completing, signing and promptly returning a proxy card, or you may vote via the Internet at the Annual Meeting. We encourage you to vote by Internet, by telephone, or by proxy card in advance even if you plan to attend the Annual Meeting. By doing so, you will ensure that your shares are represented and voted at the Annual Meeting.

Thank you for your continued support of First Advantage Corporation.

Sincerely,

Scott Staples

Chief Executive Officer

FIRST ADVANTAGE CORPORATION

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

By Order of the Board of Directors,

Bret T. Jardine

Chief Legal Officer and Corporate Secretary

Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting To Be Held on June 5, 2026: This Proxy Statement and our Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”) are available free of charge athttps://investors.fadv.com/financials-filings/sec-filings and atwww.proxydocs.com/FA. A list of stockholders of record at the close of business on April 7, 2026 will be open for examination by any stockholder for any purpose germane to the Annual Meeting for a period of 10 days prior to the Annual Meeting at our principal executive offices at 1 Concourse Parkway NE, Suite 200, Atlanta, Georgia 30328, and electronically during the Annual Meeting by registering atwww.proxydocs.com/FA.

PROXY VOTING METHODS

If, at the close of business on April 7, 2026, you were a stockholder of record, you may vote your shares by proxy at the Annual Meeting. If you were a stockholder of record, you may vote your shares in advance over the Internet, by telephone, or by mail. You may also revoke your proxies at the times and in the manner described in the General Information section of this Proxy Statement. For shares held through a broker, bank, or other nominee, you may submit voting instructions to your broker, bank or other nominee. Please refer to information from your broker, bank, or other nominee on how to submit voting instructions.

If you are a stockholder of record, your Internet, telephone, or mail vote must be received by 2:00 p.m., Eastern Time, on June 5, 2026 to be counted. If you hold shares through a broker, bank, or other nominee, please refer to information from your bank, broker, or nominee for voting instructions.

To vote by proxy if you are a stockholder of record:

BY INTERNET

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Go to the websitewww.proxypush.com/FA and follow the instructions, 24 hours a day, seven days a week.

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You will need the control number included on your Notice of Internet Availability of Proxy Materials or on your proxy card.

BY TELEPHONE

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From a touch-tone telephone, dial (866) 506-3604 and follow the recorded instructions, 24 hours a day, seven days a week.

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You will need the control number included on your Notice of Internet Availability of Proxy Materials or on your proxy card in order to vote by telephone.

BY MAIL

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If you have not already received a proxy card, you may request a proxy card from us by following the instructions on your Notice of Internet Availability of Proxy Materials.

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Mark your selections on the proxy card.

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Date and sign your name exactly as it appears on your proxy card.

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Mail the proxy card in the enclosed postage-paid envelope provided to you.

YOUR VOTE IS IMPORTANT TO US.

THANK YOU FOR VOTING.

Table of Contents

Cautionary Notice Regarding Forward-Looking Statements and Website Reference

This Proxy Statement contains “forward-looking statements” that reflect our current views with respect to, among other things, our operations and financial performance and include all statements that are not historical facts. In some cases, you can identify these forward-looking statements by the use of words such as “anticipate,” “assume,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “future,” “will,” “seek,” “foreseeable,” the negative version of these words, or similar terms and phrases. These forward-looking statements are subject to various risks, uncertainties, assumptions or changes in circumstances that are difficult to predict or quantify. For additional information on factors that could cause our actual results to differ materially from expected results, please see “Risk Factors” in our 2025 Form 10-K, as such factors may be updated from time to time in our periodic filings with the SEC, which are accessible on the SEC’s website atwww.sec.gov. The forward-looking statements included in this Proxy Statement speak only as of the date of this Proxy Statement, and we undertake no obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments, or otherwise, except as required by law.

Web links throughout this Proxy Statement are provided for convenience only, and the content on the referenced websites does not constitute a part of this Proxy Statement.

FIRST ADVANTAGE CORPORATION

1 Concourse Parkway NE, Suite 200, Atlanta, GA 30328

Telephone: (678) 868-4151

PROXY STATEMENT

Annual Meeting of Stockholders

June 5, 2026