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 Annual Report of Spring Valley Acquisition Corp. III (the “ Company ”) on Form 10-K for the year ended December 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “ Report” ), I, Christopher Sorrells, Chief Executive Officer and Chairman of the Board of Directors, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to 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.


Date: March 6, 2026	By:	/s/ Christopher Sorrells
		Christopher Sorrells
		Chief Executive Officer
		(Principal Executive Officer)