Nabors Industries (NBR) 10-Q 2015 Q2 Quarterly report

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Nabors Industries Ltd. (the “Company”) for the quarter ended June 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anthony G. Petrello, Chairman, President and Chief Executive Officer of the Company, and I, William Restrepo, Chief Financial Officer of the Company, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)the Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Anthony G. Petrello

Anthony G. Petrello

Chairman, President and Chief Executive Officer

/s/ William Restrepo

William Restrepo

Chief Financial Officer

Date: August 5, 2015