Halliburton (HAL) 10-Q 2021 Q3 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

This certification is provided pursuant to § 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. § 1350, and accompanies the Quarterly Report on Form 10-Q for the period ended September 30, 2021 of Halliburton Company (the “Company”) as filed with the Securities and Exchange Commission on the date hereof (the “Report”).

I, Jeffrey A. Miller, Chairman, President and Chief Executive Officer of the Company, certify that:

(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/ Jeffrey A. Miller

Jeffrey A. Miller

Chairman, President and Chief Executive Officer

Date: October 22, 2021