Form 4 Filing for CME Group Inc.

This filing details transactions by Jack J. Tobin, MD Chief Accounting Officer of CME Group Inc. On March 15, 2026, Mr. Tobin acquired 608 shares of Common Stock Class A through the vesting of performance shares granted in 2022. The number of shares vested was contingent upon the company's total shareholder return relative to the S&P 500 from January 1, 2023, to December 31, 2025. Additionally, on the same date, Mr. Tobin disposed of 179 shares to cover tax withholding obligations related to this award. Following these transactions, Mr. Tobin directly holds 25,409 shares of Common Stock Class A.