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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(Print or Type Responses)

1. Name and Address of Reporting Person * Duff Scott K.   2. Issuer Name and Ticker or Trading Symbol NATIONAL OILWELL VARCO INC [NOV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP Cntrlr Chf Acctg Offcr (Last) (First) (Middle) 7909 PARKWOOD CIRCLE DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 02/27/2019 (Street) HOUSTON, TX 77036 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 02/27/2019   A   24,250 (1) A $ 0 54,098 D   Common Stock 02/27/2019   F   6,833 (2) D $ 28.72 47,265 D   Common Stock 02/27/2019   A   18,802 (3) A $ 0 66,067 D   Common Stock 02/28/2019   S   15,125 (4) D $ 28.0188 50,942 D   Common Stock 02/28/2019   F   2,221 (5) D $ 28.14 48,721 D   Common Stock               5,892 (6) I by 401(K) Plan

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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

Non-Qualified Stock Option (right to buy)

$ 28.72

02/27/2019

A

59,341

(7)

02/28/2029

Common Stock

59,341

$ 0

59,341

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Duff Scott K. 7909 PARKWOOD CIRCLE DRIVE HOUSTON, TX 77036			VP Cntrlr Chf Acctg Offcr

Signatures

By: Brigitte M. Hunt For: Scott K. Duff		03/01/2019
**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)	Represents the total number of shares that vested from the performance share awards granted to Mr. Duff on February 24, 2016.
(2)	Represents the number of shares withheld from the vesting of the performance share awards granted to Mr. Duff on February 24, 2016 to satisfy tax withholding liability.
(3)	An equity award of time-based restricted stock pursuant to the Issuer's 2018 Long-Term Incentive Plan, which will vest in three equal annual installments commencing on the first anniversary of the date of the grant.
(4)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.83 to $ 28.17, inclusive.
(5)	Represents the number of shares withheld from the vesting of time-based restricted stock (granted on February 28, 2018) to satisfy tax withholding liability.
(6)	Represents the number of shares equivalent of NOV common stock held by Mr. Duff under the National Oilwell Varco, Inc. 401(k) Plan. The information in this report is based on Mr. Duff's account balance as of February 27, 2019.
(7)	The option, awarded pursuant to the Issuer's 2018 Long-Term Incentive Plan, representing a right to purchase a total of 59,341 shares, will become exercisable in three equal annual installments beginning on February 27, 2020, which will be the first anniversary of the date on which the option was granted.

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