CME Group Inc.

For the transition period from to Commission file number 001-31553 CME GROUP INC. (Exact name of registrant as specified in its charter) Delaware 36-4459170 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 20 South Wacker Drive Chicago Illinois 60606 (Address of principal executive offices) (Zip Code)

Consolidated Balance Sheets at September 30, 2026 and December 31, 2025 5

Consolidated Statements of Income for the Quarters and Nine Months Ended September 30, 2026 and 2025 6

Consolidated Statements of Comprehensive Income for the Quarters and Nine Months Ended September 30, 2026 and 2025 7

Consolidated Statements of Equity for the Quarters and Nine Months Ended September 30, 2026 and 2025 8

Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2026 and 2025 10

Notes to Unaudited Consolidated Financial Statements 12

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations 23

Item 3. Quantitative and Qualitative Disclosures About Market Risk 32

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 33