Form 4 Filing for CME Group Inc. - Durkin Bryan T

This filing reports a transaction by Durkin Bryan T, a director at CME Group Inc. On June 25, 2026, Mr. Durkin acquired 645 shares of Class A Common Stock at a price of $225 per share, bringing his total post-transaction shares to 43,652. The shares were acquired as part of the company's annual equity compensation program for non-employee directors and are fully vested, not subject to any vesting conditions. The filing also includes a Power of Attorney document authorizing specific individuals to act on Mr. Durkin's behalf for EDGAR filings.