Exhibit 32.1

Certification of Chief Executive Officer

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 Lord Abbett Private Credit Fund S (the “Company”) for the quarter ended March 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Stephan Kuppenheimer, as Chief Executive Officer of the Company, certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

1. The Report fully complies with the requirements of Section 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: May 14, 2025

By:	/s/ Stephan Kuppenheimer
	Stephan Kuppenheimer
	Chief Executive Officer
	(Principal Executive Officer)