EX-32.1 8 verx-20241231xex32d1.htm EX-32.1

Exhibit 32.1

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CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

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In connection with the Annual Report on Form 10-K of Vertex, Inc. (the “Company”) for the period ended December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

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| (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

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

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Date: February 27, 2025 | By: | /s/ David DeStefano
| David DeStefano
| Chief Executive Officer (principal executive officer)

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