Cme

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-15 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: CME GROUP INC. (CME) CIK: 0001156375 --- Reporting Owner --- Name: DUFFY TERRENCE A CIK: 0001212809 Role: Director, Officer (Chairman and CEO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Class A Date: 2026-03-15 | Code: A (Grant or award) Shares: +62,902 | Price: $311.40 Total Value: $19,587,682.80 Shares Owned After: 118,496 | Ownership: D (Direct) Footnotes: [F1] Represents the vesting of performance shares granted in 2022 under CME Group's Omnibus Stock Plan. The number of shares was determined based on the company's achievement of total shareholder return relative to the S&P 500 measured over a three-year performance period from January 1, 2023 through December 31, 2025. [Transaction #2] Security: Common Stock Class A Date: 2026-03-15 | Code: F (Payment of exercise/tax) Shares: -27,866 | Price: $311.40 Total Value: $8,677,472.40 Shares Owned After: 90,630 | Ownership: D (Direct) Footnotes: [F2] Mr. Duffy surrendered shares to the company in order to fulfill tax withholding obligations related to the receipt of the performance share award. --- Footnotes (Complete Index) --- F1: Represents the vesting of performance shares granted in 2022 under CME Group's Omnibus Stock Plan. The number of shares was determined based on the company's achievement of total shareholder return relative to the S&P 500 measured over a three-year performance period from January 1, 2023 through December 31, 2025. F2: Mr. Duffy surrendered shares to the company in order to fulfill tax withholding obligations related to the receipt of the performance share award. --- Signature --- /s/ By: Elizabeth Hensen For: Terrence A. Duffy (2026-03-17)