Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT
TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly/annual report on Form 10-Q of Circle Internet Group, Inc., a Delaware corporation (the “Company”), for the period ended June 30, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeremy Fox-Geen, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

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

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

Date: August 12, 2025

/s/ Jeremy Fox-GeenName: Jeremy Fox-Geen
Title: Chief Financial Officer