Media contact Investor contact Timothy Barello, 212.299.2256 Adam Minick, 312.340.8365 Laurie Bischel, 312.648.8698 investors@cmegroup.com news@cmegroup.com CME-G cmegroup.mediaroom.com Exhibit 99.1 FOR IMMEDIATE RELEASE CME Group Inc. Announces Third-Quarter 2025 Financial Results CHICAGO, October 22, 2025 - CME Group Inc. (NASDAQ: CME) today reported financial results for the third quarter of 2025. The company reported revenue of $1.5 billion and operating income of$973 million for the third quarter of 2 ...