Exhibit 32.1

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, David Kostman, Chief Executive Officer (Principal Executive Officer) of Teads Holding Co. (the “Company”), and Jason Kiviat, Chief Financial Officer (Principal Financial Officer) of the Company, each hereby certifies that, to the best of his knowledge:

1.The Quarterly Report on Form 10-Q for the quarter ended September 30, 2025 (the “Report”) of the Company 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 6, 2025


By:			/s/ David Kostman
			Name: David Kostman
			Title: Chief Executive Officer
			(Principal Executive Officer)


By:			/s/ Jason Kiviat
			Name: Jason Kiviat
			Title: Chief Financial Officer
			(Principal Financial Officer)

Teads Holding Co. 10-Q