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 * GOTTWALD THOMAS E   2. Issuer Name and Ticker or Trading Symbol NEWMARKET CORP [NEU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman, President & CEO (Last) (First) (Middle) 330 SOUTH FOURTH STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/18/2018 (Street) RICHMOND, VA 23219 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 12/18/2018   F   74 (1) D $ 386.65 170,527 (2) D   Common Stock               138,073 (2) I By grantor retained annuity trust Common Stock               33,775 (3) I NewMarket Savings Plan (3) Common Stock               4,598 I Shares held by wife Common Stock               500 I Shares held for reporting person's son Mark Haywood Gottwald Common Stock               63,195 I Shares held as co-trustee fbo reporting person's children u/sdtd. 4/8/94 Common Stock               10,218 I Shares held by Bruce C. Gottwald, Jr., as fbo Mark Haywood Gottwald u/a dtd. 10/18/95 Common Stock               6,889 I Shares held as co-trustee fbo reporting person's children u/a dtd. 12/16/91 Common Stock               212,407 I Shares held as co-trustee fbo (among others reporting Floyd D. Gottwald)

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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
GOTTWALD THOMAS E 330 SOUTH FOURTH STREET RICHMOND, VA 23219	X		Chairman, President & CEO

Signatures

/s/ M. Rudolph West (by Power of Attorney for Thomas E. Gottwald)		12/20/2018
**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)	On December 2, 2015, the Compensation Committee of the Board of Directors of NewMarket Corporation (the "Company") approved stock awards to be granted on December 18, 2015 (the "Award Date") pursuant to the Company's 2014 Incentive Compensation and Stock Plan. The stock vested on December 18, 2018. The disposition being reported on this Form 4 represents the shares withheld in satisfaction of the withholding tax liability.
(2)	On September 6, 2018, 47,864 shares of the Company's common stock were transferred out of the 2015 GRAT as an annuity payment to the reporting person's directly held account.
(3)	The increase in shares is due to periodic purchases by the Plan Trustee pursuant to the Plan.

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