v3.26.1
Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2026
Earnings Per Share [Abstract]  
Schedule of Anti-dilutive Stock Awards Anti-dilutive stock awards were as follows for the periods presented:
Quarter Ended
June 30,		Six Months Ended
June 30,
(in thousands)2026202520262025
Stock awards34 — 34 47 
Total34 — 34 47 
Schedule of Earnings Per Share Calculation
The following table presents the earnings per share calculation for the periods presented:
 Quarter Ended
June 30,		Six Months Ended
June 30,
2026202520262025
Net Income (in millions)
$1,041.8 $1,025.1 $2,196.1 $1,981.3 
Less: preferred stock dividends— (5.7)— (11.5)
Add: overdistributed earnings allocated to preferred stock— — 4.3 — 
Less: undistributed earnings allocated to preferred stock — (7.2)— (13.4)
Net Income Attributable to Common Shareholders of CME Group - Basic$1,041.8 $1,012.2 $2,200.4 $1,956.4 
Less: overdistributed earnings allocated to preferred stock— — (4.3)— 
Net Income Attributable to Common Shareholders of CME Group - Diluted $1,041.8 $1,012.2 $2,196.1 $1,956.4 
Weighted Average Number of Common Shares (in thousands):
Basic360,684 359,658 360,005 359,636 
Effect of restricted stock and performance shares598 697 632 661 
Effect of convertible preferred shares— — 1,596 — 
Diluted361,282 360,355 362,233 360,297 
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic$2.89 $2.81 $6.11 $5.44 
Diluted2.88 2.81 6.06 5.43