CHURCH & DWIGHT CO INC /DE/

Our Annual Report to Stockholders for 2024, including financial statements, is being furnished, simultaneously with this proxy statement, to all stockholders of record as of the close of business on March 5, 2025, the record date for voting at the Annual Meeting. A copy of our Annual Report and Form 10-K for the year ended December 31, 2024, including the financial statements, but excluding the financial statement schedules and most exhibits, will be provided without charge to stockholders upon written request to Church & Dwight Co., Inc., Princeton South Corporate Park, 500 Charles Ewing Boulevard, Ewing, New Jersey 08628 Attention: Secretary. The Form 10-K provided to stockholders will include a list of exhibits to the Form 10-K. Copies of exhibits will be furnished to stockholders upon written request and upon payment of reproduction and mailing expenses.

By Order of the Board of Directors,

PATRICK D. DE MAYNADIER

Corporate Secretary

Ewing, New Jersey

March 20, 2025

Church & Dwight Co., Inc. Princeton South Corporate Park 500 Charles Ewing Boulevard Ewing, New Jersey 08628

CHURCH & DWIGHT CO., INC. PRINCETON SOUTH CORPORATE PARK 500 CHARLES EWING BOULEVARD EWING, NJ 08628 SCAN TO VIEW MATERIALS & VOTE VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time on April 30, 2025 for shares held directly and by 10:00 a.m. Eastern Time on April 29, 2025 for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting - Go to www.virtualshareholdermeeting.com/CHD2025 You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time on April 30, 2025 for shares held directly and by 10:00 a.m. Eastern Time on April 29, 2025 for shares held in a Plan. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: V63500-P26866 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY CHURCH & DWIGHT CO., INC. The Board of Directors recommends that you vote FOR the following nominees: 1. Election of 12 nominees to serve as directors for a term of one year; For Against Abstain Nominees: 1a. Bradlen S. Cashaw ! 1b. Richard A. Dierker ! The Board of Directors recommends that you vote FOR the For Against Abstain following proposal: 1c. Matthew T. Farrell ! 2. An advisory vote to approve compensation of our named executive ! officers; 1d. Bradley C. Irwin ! The Board of Directors recommends that you vote FOR the For Against Abstain following proposal: 1e. Penry W. Price ! 3. Ratification of the appointment of Deloitte & Touche LLP as our ! independent registered public accounting firm for 2025; 1f. Susan G. Saideman ! The Board of Directors recommends that you vote AGAINST the For Against Abstain following proposal: 1g. Ravichandra K. Saligram ! 4. Stockh older Proposal - Support Special Shareholder Meeting ! Improvement. 1h. Robert K. Shearer ! To act on such other business as may properly be brought before the meeting and any adjournments or postponements thereof. 1i. Michael R. Smith ! IF NO INSTRUCTIONS ARE GIVEN, THE SHARES WILL BE VOTED FOR THE ELECTION OF THE NOMINEES NAMED IN PROPOSAL 1 AND FOR 1j. Janet S. Vergis ! PROPOSALS 2 AND 3 AND AGAINST PROPOSAL 4. THIS PROXY ALSO DELEGATES DISCRETIONARY AUTHORITY TO VOTE WITH RESPECT TO ANY OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE MEETING OR ANY ADJOURNMENTS OR POSTPONEMENTS THEREOF. 1k. Arthur B. Winkleblack ! 1l. Laurie J. Yoler ! Please sign exactly as your name(s) appear(s) hereon. All holders, including joint owners, must sign below. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. If the holder is a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting to be held on May 1, 2025: The Notice of Annual Meeting, Proxy Statement and 2024 Annual Report to Stockholders are available at www.proxyvote.com. V63501-P26866 CHURCH & DWIGHT CO., INC. Annual Meeting of Stockholders - May 1, 2025 This proxy is solicited by the Board of Directors The undersigned hereby appoints MATTHEW T. FARRELL, PATRICK D. DE MAYNADIER and RAVICHANDRA K. SALIGRAM, and each of them, proxies, each with full power of substitution, to vote all shares of stock which the undersigned would be entitled to vote if personally present at the Annual Meeting of Stockholders of Church & Dwight Co., Inc. to be held virtually via a live audio webcast at www.virtualshareholdermeeting.com/CHD2025 on Thursday, May 1, 2025 at 12:00 p.m., EDT, and at all adjournments or postponements thereof, subject to the directions indicated on the reverse side of this proxy card. If you are a participant in the Church & Dwight Co., Inc. Retirement Investment Fund Plans (the "401(k) Plans"), this proxy covers all shares for which the undersigned has the right to give voting instructions to Vanguard Fiduciary Trust Company, the trustee of the 401(k) Plans. This proxy, when properly executed, will be voted as directed by the undersigned on the reverse side. Shares in the 401(k) Plans for which voting instructions are not received by 10:00 a.m. Eastern Time on April 29, 2025, or for which no voting instructions are specified, will be voted by the trustee in the same proportion as the shares for which voting instructions are received from other participants in the applicable 401(k) Plan. Continued and to be signed on reverse side