Form 4 Filing for CME Group Inc.

This filing details a transaction by Cook Elizabeth A, a director at CME Group Inc. On June 25, 2026, 645 shares of Class A Common Stock were acquired at a price of $225.00 per share, bringing the total post-transaction shares to 18,416. The filing also notes that following a previous transaction, 20 shares were owned by joint account. A footnote indicates that the shares represent a grant of fully vested stock as part of the annual equity compensation program for non-employee directors and are not subject to vesting conditions.