Form 4 Filing for CME Group Inc.

This filing details transactions made by Terrence A. Duffy, Chairman and CEO of CME Group Inc. On March 15, 2026, Mr. Duffy acquired 62,902 shares of Common Stock Class A, valued at $311.40 per share. This acquisition represents the vesting of performance shares granted in 2022, with the number of shares determined by the company's total shareholder return relative to the S&P 500 over a three-year period ending December 31, 2025. Additionally, Mr. Duffy disposed of 27,866 shares of Common Stock Class A, also valued at $311.40 per share. This disposal was to fulfill tax withholding obligations related to the receipt of the performance share award. Following these transactions, Mr. Duffy directly owns 90,630 shares of Common Stock Class A.