Sec Form 3 Filing - Hemsey Rene @ CHURCH & DWIGHT CO INC /DE/ - 2020-02-26

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Hemsey Rene 2. Issuer Name and Ticker or Trading Symbol CHURCH & DWIGHT CO INC /DE/ [ CHD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, HR (Last) (First) (Middle) 500 CHARLES EWING BLVD 3. Date of Earliest Transaction (MM/DD/YY) 02/26/2020 (Street) EWING, NJ08628 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 6,148.113 D Common Stock 4,330.659 I Savings and Profit Sharing

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option $ 26.905 06/18/2015 06/18/2022 Common Stock 2,275 D Stock Option $ 27.225 10/01/2015 10/01/2022 Common Stock 5,000 D Stock Option $ 30.96 06/17/2016 06/17/2023 Common Stock 7,460 D Stock Option $ 34.81 06/16/2017 06/16/2024 Common Stock 5,280 D Stock Option $ 34.835 10/01/2017 10/01/2024 Common Stock 4,000 D Stock Option $ 41.915 06/22/2018 06/22/2025 Common Stock 5,900 D Stock Option $ 49.62 06/20/2019 06/20/2026 Common Stock 5,160 D Stock Option $ 47 10/03/2019 10/03/2026 Common Stock 5,000 D Stock Option $ 53.75 06/19/2020 06/19/2027 Common Stock 4,440 D Stock Option $ 50.28 06/18/2021 06/18/2028 Common Stock 8,900 D Stock Option $ 77.33 06/17/2022 06/17/2029 Common Stock 5,920 D Stock Option $ 74.43 02/26/2023 02/26/2030 Common Stock 34,002 D Phantom Stock ( 2 ) ( 1 ) ( 1 ) Common Stock 14.9554 D Restricted Stock Unit $ 0 ( 3 ) ( 4 ) Common Stock 20 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Hemsey Rene 500 CHARLES EWING BLVD EWING, NJ08628 EVP, HR Signatures /s/ Cristina Paradiso attorney in fact for Rene Hemsey 02/28/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The phantom stock shares were acquired under the Church & Dwight Co., Inc. Deferred Compensation Plan and are to be settled in cash at such time as prescribed by the Plan. ( 2 )The phantom stock shares convert to common stock on a 1-for-1 basis. ( 3 )The restricted stock units vest in 3 years on July 2, 2021. ( 4 )The restricted stock units vest in 3 years on July 2, 2021.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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