X0306 4 2018-02-23 0001163739 NABORS INDUSTRIES LTD NBR 0001334321 Restrepo William J C/O NABORS CORPORATE SERVICES, INC. 515 W. GREENS RD., SUITE 1200 HOUSTON TX 77067 1 Chief Financial Officer Common Stock 2018-02-23 4 D 0 64892 0 D 1085538 D Common Stock 2018-02-23 4 A 0 158185 0 A 1243723 D Represents the number of TSR shares forfeited on February 23, 2018, out of a total of 108,153 TSR shares originally granted to Mr. Restrepo on January 1, 2015 in accordance with his employment agreement, based on the Company's relative total shareholder return against a peer group of companies during the three-year performance period beginning on January 1, 2015 and ending on December 31, 2017, as determined on February 23, 2018 by the Compensation Committee of the Company's Board of Directors (the "Compensation Committee"). These Performance shares were earned and granted to Mr. Restrepo pursuant to his employment agreement based on the achievement of certain objectives for the year 2017, as determined on February 23, 2018, by the Compensation Committee. The Performance shares are scheduled to vest in three (3) equal annual installments beginning on the first anniversary of the date of grant. /s/ Mark D. Andrews by Power of Attorney for William Restrepo 2018-02-27