Additional Proxy Soliciting Materials (Form DEFA14A)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Check the appropriate box:

Labcorp Holdings Inc.

(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 the appropriate box):

Your Vote Counts! LABCORP HOLDINGS INC. 2026 Annual Meeting Vote by May 20, 2026 11:59 PM ET LABCORP HOLDINGS INC. 358 SOUTH MAIN STREET BURLINGTON, NC 27215 V90937-P50549 You invested in LABCORP HOLDINGS INC. and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the Annual Meeting of Shareholders to be held on May 21, 2026. Get informed before you vote View the Notice of Proxy Statement, the Proxy Statement, and Annual Report online OR you can receive a free paper or email copy of the proxy material(s) by requesting prior to May 7, 2026, to facilitate timely delivery. If you would like to request a copy of the proxy material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to [email protected]. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Requests, instructions, and other inquiries sent to this email address will not be forwarded to your investment advisor. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* May 21, 2026 9:00 A.M. EDT Virtually at: www.virtualshareholdermeeting.com/LH2026 Vote by Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card and instructions on how to vote by mail. Vote by Phone: Go to www.ProxyVote.com to view the materials, which will include a proxy card and instructions on how to vote by phone. *Please check the meeting materials for any special requirements for meeting attendance.
Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. We encourage you to access and review all of the important information contained in the proxy materials before voting. Board Recommends Voting Items 1. Election of the members of the Company's Board of Directors. Nominees: 1a. Kerrii B. Anderson For 1b. Victor Bulto For 1c. Jeffrey A. Davis For 1d. Kirsten M. Kliphouse For 1e. Garheng Kong, M.D., Ph.D. For 1f. Peter M. Neupert For 1g. Richelle P. Parham For 1h. Paul B. Rothman, M.D. For 1i. John H. Sampson, M.D., Ph.D. For 1j. Adam H. Schechter For 1k. Kathryn E. Wengel For 2. To approve, by non-binding vote, the compensation of the Company's Named Executive Officers. For 3. Ratification of the appointment of Deloitte and Touche LLP as Labcorp Holdings Inc.'s independent registered public accounting firm for the year ending December 31, 2026. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". V90938-P50549