EX-32.1 5 ex_856006.htm EXHIBIT 32.1

Exhibit 32.1

Certification Pursuant to 18

U.S.C. §1350, As Adopted

Pursuant to

§906 of the Sarbanes -Oxley Act of 2002

In connection with the Quarterly Report of FutureFuel Corp. (the "Company") on Form 10-Q for the period ended September 30, 2025 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

1. | The Report fully complies with the requirements of §13(a) of the Securities Exchange Act of 1934, as amended.

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

|  | /s/ Roeland Polet |
|  | Roeland Polet, |
|  | Chief Executive Officer |
|  | /s/ Rose M. Sparks |
|  | Rose M. Sparks, Chief Financial Officer |
|  | and Principal Financial Officer |
|  | November 10, 2025 |