Form 4 Filing for CME Group Inc.

Terrence A. Duffy, Chairman and CEO of CME Group Inc., reported the sale of 14,372 shares of Common Stock Class A on September 10, 2026. These shares were sold at a weighted average price of $274.41, with individual sales ranging from $273.875 to $274.85. Following this transaction, Mr. Duffy directly owns 41,258 shares. Additionally, on the same date, he reported the sale of 628 shares of Common Stock Class A at a weighted average price of $275.03, with prices ranging from $274.9056 to $275.0804. This resulted in him directly owning 40,630 shares post-transaction. Mr. Duffy has undertaken to provide full information regarding the number of shares sold at each separate price upon request.