| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 2,892.4a | 2,912a |
| Marketable securities | 113.2a | 111.7a |
| Accounts receivable, net of allowance of $9.0 and $7.1 | 573.1a | 535.6a |
| Other current assets (includes $6.3 and $5.2 in restricted cash) | 559.4a | 1,138.4a |
| Performance bonds and guaranty fund contributions | 98,895.4a | 90,192.5a |
| Total current assets | 103,033.5a | 94,890.2a |
| Property, net | 386.2a | 409.5a |
| Intangible assets - trading products | 17,175.3a | 17,175.3a |
| Intangible assets - other, net | 2,821.6a | 3,050.2a |
| Goodwill | 10,486.9a | 10,495.3a |
| Other assets | 3,543.5a | 3,685.6a |
| Total assets | 137,447a | 129,706.1a |
| Liabilities and equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 79.9a | 90.6a |
| Short-term debt | 749.8a | |
| Other current liabilities | 2,588.8a | 3,133.8a |
| Performance bonds and guaranty fund contributions | 98,895.4a | 90,192.5a |
| Total current liabilities | 102,313.9a | 93,416.9a |
| Long-term debt | 2,678.2a | 3,425.4a |
| Deferred income tax liabilities, net | 5,246.8a | 5,327.7a |
| Other liabilities | 721.2a | 798.2a |
| Total liabilities | 110,960.1a | 102,968.2a |
| Shareholders’ equity | — | — |
| Preferred stock, $0.01 par value, 10,000 shares authorized as of December 31, 2024 and 2023; 4,584 issued and outstanding as of December 31, 2024 and 2023 | | |
| Class A common stock, $0.01 par value, 1,000,000 shares authorized as of December 31, 2024 and 2023, 359,602 and 359,231 shares issued and outstanding as of December 31, 2024 and 2023, respectively | 3.6a | 3.6a |
| Class B common stock, $0.01 par value, 3 shares authorized, issued and outstanding as of December 31, 2024 and 2023 | | |
| Additional paid-in capital | 22,403a | 22,334.7a |
| Retained earnings | 4,185.8a | 4,455.2a |
| Accumulated other comprehensive income (loss) | -105.5a | -55.6a |
| Total CME Group shareholders’ equity | 26,486.9a | 26,737.9a |
| Total liabilities and equity | 137,447a | 129,706.1a |