PNM Resources

414 Silver Ave. SW

Albuquerque, NM 87102-3289

www.pnmresources.com

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. § 1350, AS ADOPTED PURSUANT TO § 906 OF THE

SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q for the period ended September 30, 2021, for PNM Resources, Inc. (“Company”), as filed with the Securities and Exchange Commission on October 28, 2021 (“Report”), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

Date:	October 28, 2021	By:	/s/ Patricia K. Collawn
			Patricia K. Collawn
			Chairman, President and Chief Executive Officer
			PNM Resources, Inc.
		By:	/s/ Joseph D. Tarry
			Joseph D. Tarry
			Senior Vice President and
			Chief Financial Officer
			PNM Resources, Inc.