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

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

Church & Dwight Co., 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):

CHURCH & DWIGHT CO., INC. PRINCETON SOUTH CORPORATE PARK 500 CHARLES EWING BOULEVARD EWING, NJ 08628 Your Vote Counts! CHURCH & DWIGHT CO., INC. 2026 Annual Meeting Vote by April 30, 2026 11:59 PM ET. For shares held in a Plan, vote by April 29, 2026 10:00 AM ET. V85371-P46752 You invested in CHURCH & DWIGHT CO., 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 stockholder meeting to be held on May 1, 2026. Get informed before you vote View the Notice of Annual Meeting, Proxy Statement and 2025 Annual Report to Stockholders online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 17, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder 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. 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 1, 2026 12:00 p.m. ET Virtually at: www.virtualshareholdermeeting.com/CHD2026 *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 stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Voting Items Board Recommends 1. Election of 11 nominees to serve as directors for a term of one year; Nominees: 1a. Bradlen S. Cashaw For 1b. Richard A. Dierker For 1c. Bradley C. Irwin For 1d. Penry W. Price For 1e. Susan G. Saideman For 1f. Ravichandra K. Saligram For 1g. Robert K. Shearer For 1h. Michael R. Smith For 1i. Janet S. Vergis For 1j. Arthur B. Winkleblack For 1k. Laurie J. Yoler For 2. An advisory vote to approve compensation of our named executive officers; For 3. Ratification of the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for 2026; For 4. Stockholder Proposal - Permit Stockholder Action by Written Consent. Against To act on such other business as may properly be brought before the meeting and any adjournments or postponements thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". V85372-P46752