| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| DUFFY TERRENCE A | Chairman and CEO, Director | 20 S. WACKER DRIVE, CHICAGO | By: Margaret Austin Wright For: Terrence A. Duffy | 02 Jan 2026 | 0001212809 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CME | Common Stock Class A | Tax liability | $2,788,147 | -10,210 | -16% | $273.08 | 55,594 | 31 Dec 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Mr. Duffy surrendered shares to the Company in order to fulfill tax withholding obligations upon the vesting of restricted stock on 12/31/2025. |