Exhibit 32.1

Written Statement of Chief Executive Officer and Chief Financial Officer

Pursuant to Section 906

of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350)

The undersigned, the President and Chief Executive Officer and the Senior Vice President and Chief Financial Officer of Wabash National Corporation (the “Company”), each hereby certifies that, to his knowledge, on October 24, 2024:

(a)    the Quarterly Report on Form 10-Q of the Company for the quarter ended September 30, 2024, filed on October 24, 2024 with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b)    information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Brent L. Yeagy

Brent L. Yeagy

President and Chief Executive Officer

October 24, 2024

/s/ Patrick Keslin

Patrick Keslin

Senior Vice President and Chief Financial Officer

October 24, 2024

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 Wabash National Corporation and will be retained by Wabash National Corporation and furnished to the Securities and Exchange Commission or its staff upon request.