Marriott Vacations Worldwide (VAC) 10-Q 2024 Q3 Quarterly report

Exhibit 32.1

Certification by Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, John E. Geller, Jr., President and Chief Executive Officer of Marriott Vacations Worldwide Corporation (the “Company”) certify that:

1.the Quarterly Report on Form 10-Q of the Company for the period ended September 30, 2024 (the “Quarterly Report”), fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

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

Dated: November 7, 2024

/s/ John E. Geller, Jr.

John E. Geller, Jr.

President and Chief Executive Officer

(Principal Executive Officer)