Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Metals Acquisition Corp (the “Company”) on Form 10-K for the year ended December 31, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Michael James McMullen, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 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 this Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the period covered by the Report.

March 31, 2022	/s/ Michael James McMullen
	Michael James McMullen
	Chief Executive Officer
	(Principal Executive Officer)

A signed original of this written statement required by Section 906 has been provided to Metals Acquisition Corp and will be retained by Metals Acquisition Corp and furnished to the Securities and Exchange Commission or its staff upon request.