X0306 5 2015-12-31 0 0 1 0001021860 NATIONAL OILWELL VARCO INC NOV 0001614165 Duff Scott K. 7909 PARKWOOD CIRCLE DRIVE HOUSTON TX 77036 0 1 0 0 VP Cntrlr Chf Acctg Offcr Common Stock 2015-02-21 4 F 0 412 54.47 D 6529 D Common Stock 5644 I by 401(K) Plan Represents the number of shares withheld from the vesting of time-based restricted stock shares to satisfy tax withholding liability. In connection with the spin-off of NOW Inc. on May 30, 2014, all outstanding NOV stock options, restricted stock awards and performance based equity awards held by continuing NOV employees, officers and directors, were adjusted to preserve the intrinsic value of such awards. The adjusted number of shares subject to such awards are reflected in this filing. 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 December 31, 2015. By: Brigitte M. Hunt For: Scott K. Duff 2016-01-27