FORM 4 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 OF SECURITIES 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 * Tursi Louis   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) Executive VP, Consumer Sales (Last) (First) (Middle) PRINCETON SOUTH CORPORATE PARK, 500 CHARLES EWING BOULEVARD 3. Date of Earliest Transaction (Month/Day/Year) 08/17/2018 (Street) EWING, NJ 08628 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 08/17/2018   M   92,380 A $ 26.905 155,434.2025 D   Common Stock 08/17/2018   S   92,380 D $ 57.1104 (1) 63,054.2025 D   Common Stock 08/17/2018   M   77,700 A $ 30.96 140,754.2025 D   Common Stock 08/17/2018   S   77,700 D $ 57.1104 (1) 63,054.2025 D   Common Stock 08/17/2018   M   58,420 A $ 34.81 121,474.2025 D   Common Stock 08/17/2018   S   58,420 D $ 57.1104 (1) 63,054.2025 D   Common Stock 08/17/2018   M   59,320 A $ 41.915 122,374.2025 D   Common Stock 08/17/2018   S   59,320 D $ 57.1104 (1) 63,054.2025 D   Common Stock 08/17/2018   I   47,228.191 D $ 57.15 0 I Prfit Shring/saving Plan Trust Common Stock 08/17/2018   S   2,032 D $ 57 61,022.2025 D   Common Stock 08/17/2018   S   3,736 D $ 57.01 57,286.2025 D   Common Stock 08/17/2018   S   22,232 D $ 57.06 35,054.2025 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

08/17/2018

M

92,380

06/18/2015

06/18/2022

Common Stock

92,380

$ 0

0

D

Stock Option

$ 30.96

08/17/2018

M

77,700

06/17/2016

06/17/2023

Common Stock

77,700

$ 0

0

D

Stock Option

$ 34.81

08/17/2018

M

58,420

06/16/2017

06/16/2024

Common Stock

58,420

$ 0

0

D

Stock Option

$ 41.915

08/17/2018

M

59,320

06/22/2018

06/22/2028

Common Stock

59,320

$ 0

0

D

Phantom Stock

(2)

08/17/2018

I

30,338.9045

08/08/1988(3)

08/08/1988(3)

Common Stock

30,338.9045

$ 57.15

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Tursi Louis PRINCETON SOUTH CORPORATE PARK 500 CHARLES EWING BOULEVARD EWING, NJ 08628			Executive VP, Consumer Sales

Signatures

/s/ La Fleur Browne, attorney-in-fact for Louis H. Tursi		08/20/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The price in Column 4 is a weighted average price. The prices actually paid in this transaction range from $56.85 to $57.28. Detailed information regarding the number of shares sold at each separate price will be provided upon request by the Commission staff, the Issuer or a security holder of the Issuer.
(2)	The phantom stock shares convert to common stock on a 1-for-1 basis.
(3)	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.

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