Exhibit 32.1

CERTIFICATION

Kelli F. Valade

Chief Executive Officer

of Denny’s Corporation

and

Robert P. Verostek

Executive Vice President and Chief Financial Officer

of Denny's Corporation

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 of Denny’s Corporation (the “Company”) on Form 10-Q for the quarter ended September 24, 2025 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Kelli F. Valade, Chief Executive Officer of the Company, and I, Robert P. Verostek, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 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 the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:

November 3, 2025

By:

/s/ Kelli F. Valade

Kelli F. Valade

Chief Executive Officer

Date:

November 3, 2025

By:

/s/ Robert P. Verostek

Robert P. Verostek

Executive Vice President and

Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Denny’s Corporation and will be retained by Denny’s Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

DENNY'S Corp 10-Q