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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Anti-dilutive stock awards were as follows for the periods presented:

			Quarter Ended September 30,												Nine Months Ended September 30,
(in thousands)			2025						2024						2025						2024
Stock awards			—						333						79						334
Total			—						333						79						334

Basic And Diluted Earnings Per Share

The following table presents the earnings per share calculation for the periods presented:

						Quarter Ended September 30,												Nine Months Ended September 30,
						2025						2024						2025						2024
Net Income (in millions)						$	908.0					$	912.8					$	2,889.3					$	2,651.2
Less: preferred stock dividends						(5.7)						(5.3)						(17.2)						(15.8)
Less: undistributed earnings allocated to preferred stock						(5.7)						(6.2)						(19.1)						(17.6)
Net Income Attributable to Common Shareholders of CME Group						$	896.6					$	901.3					$	2,853.0					$	2,617.8
Weighted Average Number of Common Shares (in thousands):
Basic						359,686						359,400						359,653						359,329
Effect of restricted stock and performance shares						736						589						677						570
Diluted						360,422						359,989						360,330						359,899
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic						$	2.49					$	2.51					$	7.93					$	7.29
Diluted						2.49						2.50						7.92						7.27

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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