Transaction Details

Footnotes

For the PSAs granted in September 2021: Represents shares earned from a 2021 performance share award based on the company's achievement of total shareholder return relative to the S&P 500 measured over 2022-2024. | The original Form 4 filed on March 18, 2025 is being amended to update the number of shares held directly and indirectly after a late form 5 was filed on May 5, 2025 to reflect the transfer of CME Group Class A common stock on October 31, 2024 to reporting person's revocable living trust. This Form 4/A is being filed to update the number of securities held directly and indirectly following this transaction. | Mr. Sammann surrendered shares to the Company in order to fulfill tax withholding obligations in connection with the receipt of the performance share award.