X0306 4 2018-08-09 0 0001021860 NATIONAL OILWELL VARCO INC NOV 0001248273 MATTSON ERIC L 7909 PARKWOOD CIRCLE DRIVE HOUSTON TX 77036 1 0 0 0 Common Stock 2018-08-09 4 M 0 4338 30.953 A 76484 D Common Stock 2018-08-09 4 S 0 4338 45.6478 D 72146 D Non-Qualified Stock Option (right to buy) 30.953 2018-08-09 4 M 0 4338 0.00 D 2019-05-14 Common Stock 4338 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.6401 to $45.6700, inclusive. The reporting person undertakes to provide to National Oilwell Varco, Inc., any security holder of National Oilwell Varco, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. The option, representing a right to purchase a total of 4,338 shares, became exercisable in three equal annual installments beginning on May 13, 2010, which was the first anniversary of the date on which the option was granted. By: Brigitte M. Hunt For: Eric L. Mattson 2018-08-10