0001156375-26-000020 | 10-Q | XBRL Viewer

Debt

3 Months Ended

Mar. 31, 2026

Long-term debt consisted of the following at March 31, 2026 and December 31, 2025:


(in millions)	March 31, 2026		December 31, 2025
$500.0 million fixed rate notes due June 2028, stated rate of 3.75%	$	499.1	$	498.9
$750.0 million fixed rate notes due March 2030, stated rate of 4.40%	742.6		742.1
$750.0 million fixed rate notes due March 2032, stated rate of 2.65%	744.8		744.6
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% (1)	744.7		744.6
$700.0 million fixed rate notes due June 2048, stated rate of 4.15%	692.0		692.1
Total long-term debt	$	3,423.2	$	3,422.3

(1)The company maintained a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 4.73%.

Long-term debt maturities, at par value, were as follows at March 31, 2026:


(in millions)	Par Value
2027	$	—
2028	500.0
2029	—
2030	750.0
2031	—
Thereafter	2,200.0

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value by Fair Value Hierarchy Level, Extensible Enumeration [Abstract]

Financial instruments measured at fair value on a recurring basis

The following table presents financial instruments measured at fair value on a recurring basis:


	March 31, 2026
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities	$	6.9	$	—	$	—	$	6.9

Mutual funds	116.0		—		—		116.0
Equity securities	1.3		—		—		1.3

Total Marketable Securities	124.2		—		—		124.2





Total Assets at Fair Value	$	124.2	$	—	$	—	$	124.2

Fair value of Debt Instruments

At March 31, 2026, the fair values were as follows:


(in millions)	Fair Value		Level

$500.0 million fixed rate notes due June 2028	$	496.1	Level 2
$750.0 million fixed rate notes due March 2030	751.4		Level 2
$750.0 million fixed rate notes due March 2032	679.9		Level 2
$750.0 million fixed rate notes due September 2043	732.6		Level 2
$700.0 million fixed rate notes due June 2048	571.8		Level 2

Fair Value Measurements (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - Fair Value, Recurring [Member] $ in Millions	Mar. 31, 2026 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	$ 124.2
Total Assets at Fair Value	124.2
Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	6.9
Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	116.0
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	1.3
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	124.2
Total Assets at Fair Value	124.2
Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	6.9
Fair Value, Inputs, Level 1 [Member] \| Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	116.0
Fair Value, Inputs, Level 1 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	1.3
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Total Assets at Fair Value	0.0
Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Fair Value, Inputs, Level 2 [Member] \| Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	0.0
Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Total Assets at Fair Value	0.0
Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	0.0
Fair Value, Inputs, Level 3 [Member] \| Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading Securities at Fair Value	0.0
Fair Value, Inputs, Level 3 [Member] \| Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities	$ 0.0

Consolidated Balance Sheets - USD ($)
$ in Millions

Mar. 31, 2026

Dec. 31, 2025

Assets

Cash and cash equivalents

$ 2,391.2

$ 4,416.9

Marketable securities

124.2

125.0

Accounts receivable, net of allowance of $9.5 and $10.0

935.5

639.2

Other current assets (includes $6.4 and $6.5 in restricted cash)

515.0

522.1

Performance bonds and guaranty fund contributions

165,035.3

159,656.1

Total current assets

169,001.2

165,359.3

Property, net of accumulated depreciation and amortization of $1,028.3 and $1,005.7

355.4

362.7

Intangible assets—trading products

^[1]

17,175.3

Intangible assets—other, net

2,550.8

2,610.7

Goodwill

10,506.0

10,514.7

Other assets

2,404.8

2,401.5

Total Assets

201,993.5

198,424.2

Liabilities and Equity

Accounts payable

75.4

71.8

Other current liabilities

887.1

568.8

Performance bonds and guaranty fund contributions

165,035.3

159,656.1

Total current liabilities

165,997.8

160,296.7

Long-term debt

3,423.2

3,422.3

Deferred income tax liabilities, net

5,221.1

5,242.2

Other liabilities

733.2

734.8

Total Liabilities

175,375.3

169,696.0

Shareholders' Equity:

Preferred stock, $0.01 par value, 10,000 shares authorized at March 31, 2026 and December 31, 2025; no shares issued and outstanding as of March 31, 2026 and 4,584 issued and outstanding as of December 31, 2025

0.0

Additional paid-in capital

21,670.6

22,209.5

Retained earnings

4,884.6

6,433.2

Accumulated other comprehensive income (loss)

59.4

81.9

Total CME Group Shareholders’ Equity

26,618.2

28,728.2

Total Liabilities and Equity

201,993.5

198,424.2

Class A Common Stock [Member]

Shareholders' Equity:

Common stock

3.6

Class B Common Stock [Member]

Shareholders' Equity:

Common stock

$ 0.0

[1]

Trading products represent futures and options products acquired in our business combinations with CBOT Holdings, Inc., NYMEX Holdings, Inc. and The Board of Trade of Kansas City, Missouri, Inc. Clearing and transaction fees are generated through the trading of these products. These trading products, most of which have traded for decades, require authorization from the Commodity Futures Trading Commission (CFTC). Product authorizations from the CFTC have no term limits.

Segment Reporting	3 Months Ended
Segment Reporting	Mar. 31, 2026
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The company's business is conducted through one reportable business segment, CME Group consolidated. The company has one operating segment as this is the level at which resource allocation and operating decisions regarding company performance are evaluated and determined by the senior leadership team. The chief operating decision maker (CODM) reviews the financial results of CME Group consolidated on an ongoing basis throughout the year. As a single segment, the segment profitability measure is consolidated net income. Consolidated net income informs key operating decisions as made by the CODM, which include bonus allocation, discretionary share-based awards, liquidity and cash needs, new product development, existing product expansion and product discontinuation. Consolidated net income is deemed the best indicator of segment performance. Segment assets are not reported to, or used by, the CODM to allocate resources or to assess performance. The CODM evaluates current period consolidated net income performance as compared to prior periods, budgeted results and forecasts. The CODM reviews consolidated revenues as disaggregated by the following: clearing and transaction fees as a combination of rate per contract and average daily volume for each major asset class, market data fee revenue and other revenue. The significant expense categories are consistent with those presented on the face of the consolidated statements of income. The components of non-operating income are also reviewed by the CODM. It is noted that the level of financial information provided to the CODM is consistent with the financial statement line items as disclosed in our consolidated statements of income.

- Definition

The entire disclosure for segment reporting.

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+ Details

Guarantees	3 Months Ended
Guarantees	Mar. 31, 2026
Guarantees [Abstract]
Guarantees	Guarantees Mutual Offset Agreement. CME and Singapore Exchange Limited (SGX) maintain a mutual offset agreement with a current term through April 2027. This agreement enables market participants to open a futures position on one exchange and liquidate it on the other. The term of the agreement will automatically renew for a two-year period after April 2027 unless either party provides advance notice of their intent to terminate. CME can maintain collateral in the form of irrevocable, standby letters of credit. At March 31, 2026, CME was contingently liable to SGX on letters of credit totaling $400.0 million. CME also maintains a $350.0 million line of credit to meet its obligations under this agreement. Regardless of the collateral, CME guarantees all cleared transactions submitted through SGX and would initiate procedures designed to satisfy these financial obligations in the event of a default, such as the use of performance bonds and guaranty fund contributions of the defaulting clearing firm. Management has assessed the fair value of the company’s guarantee liability under this mutual offset agreement by taking the following factors into consideration: the design and operations of the clearing risk management process, the financial safeguard packages in place, historical evidence of default by a clearing firm and the estimated probability of potential payouts by the clearing house. Based on the assessment performed, management estimates the guarantee liability to be nominal and therefore has not recorded any liability at March 31, 2026 and December 31, 2025. Family Farmer and Rancher Protection Fund. In 2012, the company established the Family Farmer and Rancher Protection Fund (the Fund). The Fund is designed to provide payments, up to certain maximum levels, to family farmers, ranchers and other agricultural industry participants who use the company’s agricultural commodity products and who suffer losses to their segregated account balances due to their CME clearing firm becoming insolvent. Under the terms of the Fund, farmers and ranchers are eligible for up to $25,000 per participant. Farming and ranching cooperatives are eligible for up to $100,000 per cooperative. The Fund was established with a maximum of $100.0 million available for distribution to participants. Since its establishment, the Fund has made payments of approximately $2.0 million, which leaves $98.0 million available for future claims. If, at any time, payments due to participants were to exceed the amount remaining in the Fund, payments would be pro-rated. Clearing firms and customers must register with the company in advance and provide certain documentation in order to substantiate their eligibility. The company believes that its guarantee liability is nominal and therefore has not recorded any liability at March 31, 2026 and December 31, 2025.

- Definition

The entire disclosure for each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties.

+ References

+ Details

Debt (Schedule Of Maturities Of Long-Term Debt) (Details) $ in Millions	Mar. 31, 2026 USD ($)
Debt Disclosure [Abstract]
2027	$ 0.0
2028	500.0
2029	0.0
2030	750.0
2031	0.0
Thereafter	$ 2,200.0

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2026

Revenue Recognition [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table represents a disaggregation of revenue from contracts with customers by product line for the quarters ended March 31, 2026 and 2025:


	Quarter Ended March 31,
(in millions)		2026		2025
Interest rates		$	521.2	$	436.3
Equity indexes		315.6		304.2
Foreign exchange		56.8		53.4
Agricultural commodities		167.5		164.3
Energy		263.7		216.4
Metals		118.4		70.9
BrokerTec fixed income		40.2		35.9
EBS foreign exchange		36.4		35.1
Interest rate swap		22.8		20.8
Total clearing and transaction fees		1,542.6		1,337.3
Market data and information services		224.1		194.5
Other		113.4		110.5
Total revenues		$	1,880.1	$	1,642.3

Timing of Revenue Recognition
Services transferred at a point in time		$	1,517.0	$	1,309.1
Services transferred over time		357.3		328.2
One-time charges and miscellaneous revenues		5.8		5.0
Total revenues		$	1,880.1	$	1,642.3

Accumulated Other Comprehensive Income (Notes)

3 Months Ended

Mar. 31, 2026

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The following tables present changes in the accumulated balances for each component of other comprehensive income (loss), including current period other comprehensive income (loss) and reclassifications out of accumulated other comprehensive income (loss):


(in millions)	Investment Securities		Defined Benefit Plans		Derivative Investments		Foreign Currency Translation		Total
Balance at December 31, 2025	$	—	$	0.3	$	56.2	$	25.4	$	81.9
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	(0.1)		(2.1)		—		(21.9)		(24.1)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(1.1)		—		(1.1)
Income tax benefit (expense)	—		0.4		0.3		2.0		2.7
Net current period other comprehensive income (loss)	(0.1)		(1.7)		(0.8)		(19.9)		(22.5)
Balance at March 31, 2026	$	(0.1)	$	(1.4)	$	55.4	$	5.5	$	59.4


(in millions)	Investment Securities		Defined Benefit Plans		Derivative Investments		Foreign Currency Translation		Total
Balance at December 31, 2024	$	(0.3)	$	(14.1)	$	59.3	$	(150.4)	$	(105.5)
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	0.2		(1.2)		—		35.6		34.6

Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(0.9)		—		(0.9)
Income tax benefit (expense)	—		0.3		0.2		(3.5)		(3.0)
Net current period other comprehensive income (loss)	0.2		(0.9)		(0.7)		32.1		30.7

Balance at March 31, 2025	$	(0.1)	$	(15.0)	$	58.6	$	(118.3)	$	(74.8)

Intangible Assets And Goodwill (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Intangible Asset, Goodwill and Other [Abstract]
Amortization of purchased intangibles	$ 56.1	$ 55.2
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax	$ 3.9

- Definition

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details

Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2026

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)


(in millions)	Investment Securities		Defined Benefit Plans		Derivative Investments		Foreign Currency Translation		Total
Balance at December 31, 2025	$	—	$	0.3	$	56.2	$	25.4	$	81.9
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	(0.1)		(2.1)		—		(21.9)		(24.1)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(1.1)		—		(1.1)
Income tax benefit (expense)	—		0.4		0.3		2.0		2.7
Net current period other comprehensive income (loss)	(0.1)		(1.7)		(0.8)		(19.9)		(22.5)
Balance at March 31, 2026	$	(0.1)	$	(1.4)	$	55.4	$	5.5	$	59.4


(in millions)	Investment Securities		Defined Benefit Plans		Derivative Investments		Foreign Currency Translation		Total
Balance at December 31, 2024	$	(0.3)	$	(14.1)	$	59.3	$	(150.4)	$	(105.5)
Other comprehensive income (loss) before reclassifications and income tax benefit (expense)	0.2		(1.2)		—		35.6		34.6

Amounts reclassified from accumulated other comprehensive income (loss)	—		—		(0.9)		—		(0.9)
Income tax benefit (expense)	—		0.3		0.2		(3.5)		(3.0)
Net current period other comprehensive income (loss)	0.2		(0.9)		(0.7)		32.1		30.7

Balance at March 31, 2025	$	(0.1)	$	(15.0)	$	58.6	$	(118.3)	$	(74.8)

Financing Lease Future Minimum Payments (Details) $ in Millions	Mar. 31, 2026 USD ($)
Finance Leases, Future Minimum Payments Due [Line Items]
Remainder of 2026	$ 13.2
2027	17.8
2028	17.9
2029	18.1
2030	18.3
2031	4.6
Thereafter	0.0
Total Finance Lease Payments	89.9
Finance Lease Payments, Less Imputed Interest	(41.4)
Present Value of Finance Lease Liability	$ 48.5

Intangible Assets And Goodwill (Components of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Line Items]
Goodwill	$ 10,506.0		$ 10,514.7	$ 10,486.9
Goodwill, Foreign Currency Translation, Gain (Loss)	$ (8.7)	$ 27.8

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash Flows from Operating Activities
Net Income	$ 1,154.3	$ 956.2
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	21.8	21.2
Amortization of purchased intangibles	56.1	55.2
Depreciation and amortization	27.2	27.3
Net realized and unrealized (gains) losses on investments	22.9	(2.6)
Deferred income taxes	(13.4)	(7.4)
Change in:
Accounts receivable	(295.8)	(196.8)
Other current assets	(50.1)	0.0
Other assets	3.5	16.5
Accounts payable	3.6	20.3
Income taxes payable	327.6	280.9
Other current liabilities	20.9	(57.1)
Other liabilities	(7.6)	(2.8)
Other	(11.1)	5.7
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation	1,259.9	1,116.6
Cash Flows from Investing Activities
Proceeds from maturities of available-for-sale marketable securities	1.1	3.6
Purchases of available-for-sale marketable securities	(0.8)	(3.0)
Purchases of property, net	(21.8)	(14.2)
Investments in privately-held equity investments	(1.5)	(2.4)
Net Cash Used in Investing Activities	(23.0)	(16.0)
Cash Flows from Financing Activities
Proceeds from debt, net of issuance costs	0.0	742.3
Repayment of debt	0.0	(750.0)
Cash dividends	(2,697.6)	(2,567.4)
Repurchase of Class A common stock, including costs	(538.7)	0.0
Change in performance bond and guaranty fund contributions	5,379.2	21,799.1
Employee taxes paid on restricted stock vesting	(22.0)	(8.2)
Other	(4.4)	(4.4)
Net Cash Provided by Financing Activities	2,116.5	19,211.4
Net change in cash, cash equivalents and restricted cash	3,353.4	20,312.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, beginning balance	164,079.5	101,794.1
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, ending balance	167,432.9	122,106.1
Cash and cash equivalents	2,391.2	1,405.3
Short-term restricted cash	6.4	6.3
Long-term restricted cash	0.0
Restricted cash and restricted cash equivalents (performance bonds and guaranty fund contributions)	165,035.3	120,694.5
Income taxes paid	42.7	12.7
Interest paid	$ 46.3	$ 41.1

Performance Bonds and Guaranty Fund Contributions (Notes)	3 Months Ended
	Mar. 31, 2026
Performance Bonds and Guaranty Fund Contributions [Abstract]
Performance Bonds and Guaranty Fund Contributions	Performance Bonds and Guaranty Fund Contributions Performance Bonds and Guaranty Fund Contribution Reinvestment. CME reinvests cash performance bonds and guaranty fund contributions and distributes a portion of the interest earned back to the clearing firms. The reinvestment of cash can include certain commercial and central bank deposits, government securities, reverse repurchase agreements, and money market funds. CME has been designated as a systemically important financial market utility by the Financial Stability Oversight Council and is authorized to maintain cash accounts at the Federal Reserve Bank of Chicago. At March 31, 2026, CME maintained $144.3 billion within the cash account at the Federal Reserve Bank of Chicago. The cash deposit at the Federal Reserve Bank of Chicago is included within performance bonds and guaranty fund contributions on the consolidated balance sheets. Cash performance bonds and guaranty fund contributions are included as restricted cash and restricted cash equivalents on the consolidated statements of cash flows. In the first quarter of 2026 and 2025, earnings from cash performance bond and guaranty fund contributions were $1,371.1 million and $873.6 million, respectively. In the first quarter of 2026 and 2025, expenses related to the distribution of interest earned on collateral reinvestments were $1,249.2 million and $804.8 million, respectively. The earnings from cash performance bonds and guaranty fund contributions are included in investment income and the expense related to the distribution of interest earned is included in other non-operating income (expense) on the consolidated statements of income. Clearing House Contract Settlement. The clearing house marks-to-market open positions at least once each business day (twice each business day for all futures and options contracts). Based on values derived from the mark-to-market process, the clearing house requires payments from clearing firms whose positions have lost value and makes payments to clearing firms whose positions have gained value. Under the extremely unlikely scenario of simultaneous default by every clearing firm who has open positions with unrealized losses, the maximum exposure at the time of default related to futures and options on futures positions would be one half of a business day of changes in fair value of all open positions, before considering the clearing house's ability to access defaulting clearing firms' collateral deposits. For cleared interest rate swap contracts, the maximum exposure at the time of default related to the clearing house's guarantee would be one full business day of changes in fair value of all open positions, before considering the clearing house's ability to access defaulting clearing firms' collateral. During the first quarter of 2026, the clearing house transferred an average of approximately $9.2 billion a day through its clearing systems for settlement from clearing firms whose positions had lost value to clearing firms whose positions had gained value. The clearing house reduces its guarantee exposure through initial and maintenance performance bond requirements and mandatory guaranty fund contributions. Management has assessed the fair value of the company’s settlement guarantee liability by taking the following factors into consideration: the design and operations of the clearing risk management process, the financial safeguard packages in place, historical evidence of default by a clearing firm and the estimated probability of potential payouts by the clearing house. Based on the assessment performed, management estimates the guarantee liability to be nominal and therefore has not recorded any liability at March 31, 2026 and December 31, 2025. The company does not have a history of significant losses recognized on performance bond collateral as posted by our clearing firms, and management currently does not anticipate any future credit losses on its performance bond assets. Accordingly, the company has not provided an allowance for credit losses on these performance bond deposits, nor has it recorded any liabilities to reflect an allowance for credit losses related to our off-balance sheet credit exposures and guarantees.

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Statement [Line Items]
Accounts receivable, allowance	$ 9.5	$ 10.0
Short-term restricted cash	6.4	6.5
Accumulated depreciation and amortization, property	1,028.3	1,005.7
Long-term restricted cash	$ 0.0	$ 0.0
Preferred Stock [Member]
Statement [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	4,584,000	4,584,000
Preferred stock, shares outstanding (in shares)	4,584,000	4,584,000
Class A Common Stock [Member]
Statement [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	361,790,000	358,950,000
Common stock, shares outstanding (in shares)	361,790,000	358,950,000
Class B Common Stock [Member]
Statement [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000	3,000
Common stock, shares issued (in shares)	3,000	3,000
Common stock, shares outstanding (in shares)	3,000	3,000

Leases (Tables)

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Lease, Cost [Table Text Block]

The components of lease costs were as follows:


	Quarter Ended March 31,
(in millions)		2026		2025
Operating lease expense:
Operating lease cost		$	11.9	$	9.7
Short-term lease cost		0.1		0.1
Total operating lease expense included in other expense		$	12.0	$	9.8

Finance lease expense:
Interest expense		$	0.4	$	0.5
Depreciation expense		2.2		2.2
Total finance lease expense		$	2.6	$	2.7

Sublease revenue included in other revenue		$	3.9	$	2.9

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental cash flow information related to leases was as follows:


	Quarter Ended March 31,
(in millions)		2026		2025
Cash outflows for operating leases		$	14.1	$	15.1
Cash outflows for finance lease		4.4		4.4

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Supplemental balance sheet information related to leases was as follows:

Operating leases


(in millions)	March 31, 2026			December 31, 2025
Operating lease right-of-use assets	$	198.7		$	210.3

Operating lease liabilities:
Other current liabilities	$	46.2		$	46.8
Other liabilities	224.3			237.4
Total operating lease liabilities	$	270.5		$	284.2



Weighted average remaining lease term (in months)	97			99
Weighted average discount rate	4.1		%	4.1		%

Finance lease


(in millions)	March 31, 2026			December 31, 2025
Finance lease right-of-use assets	$	43.3		$	45.5

Finance lease liabilities:
Other current liabilities	$	9.1		$	9.0
Other liabilities	39.4			41.7
Total finance lease liabilities	$	48.5		$	50.7

Weighted average remaining lease term (in months)	60			63
Weighted average discount rate	3.5		%	3.5		%

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments were as follows as of March 31, 2026 for operating and finance leases:


(in millions)	Operating Leases
Remainder of 2026	$	42.8
2027	49.5
2028	43.8
2029	33.2
2030	32.2
2031	30.3
Thereafter	80.0
Total lease payments	311.8
Less: imputed interest	(41.3)
Present value of lease liability	$	270.5

Finance Lease, Liability, Fiscal Year Maturity


(in millions)	Finance Leases
Remainder of 2026	$	13.2
2027	17.8
2028	17.9
2029	18.1
2030	18.3
2031	4.6
Thereafter	—
Total lease payments	89.9
Less: imputed interest	(41.4)
Present value of lease liability	$	48.5

Leases (Notes)

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Lessee, Leases [Policy Text Block]

Leases

The company has operating leases for corporate offices. The operating leases have remaining lease terms of up to 12 years, some of which include options to extend or renew the leases for up to an additional five years, and some of which include options to early terminate the leases in less than 12 months. Management evaluates whether these options are exercisable at least quarterly in order to determine whether the contract term must be reassessed. For a small number of the leases, primarily

the international locations, management’s approach is to enter into short-term leases for a lease term of 12 months or less in order to provide for greater flexibility in the local environment. For certain office spaces, the company has entered into arrangements to sublease excess space to third parties, while the original lease contract remains in effect with the landlord.

The company also has one finance lease, which is related to the sale of our data center in March 2016. In connection with the sale, the company leased back a portion of the property. The transaction was recognized under the financing method and not as a sale leaseback arrangement.

The right-of-use lease asset is recorded within other assets, and the present value of the lease liability is recorded within other liabilities (segregated between short term and long term) on the consolidated balance sheets. The discount rate applied to the lease payments represents the company’s incremental borrowing rate.

The components of lease costs were as follows:


	Quarter Ended March 31,
(in millions)		2026		2025
Operating lease expense:
Operating lease cost		$	11.9	$	9.7
Short-term lease cost		0.1		0.1
Total operating lease expense included in other expense		$	12.0	$	9.8

Finance lease expense:
Interest expense		$	0.4	$	0.5
Depreciation expense		2.2		2.2
Total finance lease expense		$	2.6	$	2.7

Sublease revenue included in other revenue		$	3.9	$	2.9

Supplemental cash flow information related to leases was as follows:


	Quarter Ended March 31,
(in millions)		2026		2025
Cash outflows for operating leases		$	14.1	$	15.1
Cash outflows for finance lease		4.4		4.4

Supplemental balance sheet information related to leases was as follows:

Operating leases


(in millions)	March 31, 2026			December 31, 2025
Operating lease right-of-use assets	$	198.7		$	210.3

Operating lease liabilities:
Other current liabilities	$	46.2		$	46.8
Other liabilities	224.3			237.4
Total operating lease liabilities	$	270.5		$	284.2



Weighted average remaining lease term (in months)	97			99
Weighted average discount rate	4.1		%	4.1		%

Finance lease


(in millions)	March 31, 2026			December 31, 2025
Finance lease right-of-use assets	$	43.3		$	45.5

Finance lease liabilities:
Other current liabilities	$	9.1		$	9.0
Other liabilities	39.4			41.7
Total finance lease liabilities	$	48.5		$	50.7

Weighted average remaining lease term (in months)	60			63
Weighted average discount rate	3.5		%	3.5		%

Future minimum lease payments were as follows as of March 31, 2026 for operating and finance leases:


(in millions)	Operating Leases
Remainder of 2026	$	42.8
2027	49.5
2028	43.8
2029	33.2
2030	32.2
2031	30.3
Thereafter	80.0
Total lease payments	311.8
Less: imputed interest	(41.3)
Present value of lease liability	$	270.5


(in millions)	Finance Leases
Remainder of 2026	$	13.2
2027	17.8
2028	17.9
2029	18.1
2030	18.3
2031	4.6
Thereafter	—
Total lease payments	89.9
Less: imputed interest	(41.4)
Present value of lease liability	$	48.5

Subsequent Events (Notes)	3 Months Ended
Subsequent Events (Notes)	Mar. 31, 2026
Subsequent Event [Line Items]
Subsequent Events [Text Block]	Subsequent Events The company has evaluated subsequent events through the date the financial statements were issued. The company has determined that there were no subsequent events that met the requirement for recognition or disclosure in the consolidated financial statements.

Accounting Policies	3 Months Ended
Accounting Policies	Mar. 31, 2026
Accounting Policies [Abstract]
Significant Accounting Policies	Accounting Policies Newly Adopted Accounting Policies. In July 2025, the FASB issued an accounting standards update which provides a practical expedient when estimating the amount of expected credit losses on current accounts receivable and current contract assets. This update permits entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the current accounts receivable and current contract assets. Therefore, entities will not need to develop reasonable and supportable forecasts of future economic conditions. The practical expedient must be applied consistently across all current accounts receivable and current contract assets. The Company adopted this standard on January 1, 2026, and has elected to apply the practical expedient. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Fair Value Measurements (Debt Instruments) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
$750.0 million Fixed Rate Notes Due September 2043, stated rate of 5.30% [Member]
Statement [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 15, 2043
$700.0 Million Fixed Rate Notes Due June 2048, stated rate of 4.15% [Member] [Domain] [Domain]
Statement [Line Items]
Debt Instrument, Face Amount	$ 700.0
Debt Instrument, Maturity Date	Jun. 15, 2048
$750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65%
Statement [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 15, 2032
$500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain]
Statement [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 15, 2030
$750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member]
Statement [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 15, 2025
Fair Value, Inputs, Level 2 [Member] \| $750.0 million Fixed Rate Notes Due September 2043, stated rate of 5.30% [Member]
Statement [Line Items]
Debt Instrument, Fair Value Disclosure	$ 732.6
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Sep. 15, 2043
Fair Value, Inputs, Level 2 [Member] \| $700.0 Million Fixed Rate Notes Due June 2048, stated rate of 4.15% [Member] [Domain] [Domain]
Statement [Line Items]
Debt Instrument, Fair Value Disclosure	$ 571.8
Debt Instrument, Face Amount	$ 700.0
Debt Instrument, Maturity Date	Jun. 15, 2048
Fair Value, Inputs, Level 2 [Member] \| $750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65%
Statement [Line Items]
Debt Instrument, Fair Value Disclosure	$ 679.9
Fair Value, Inputs, Level 2 [Member] \| $500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain]
Statement [Line Items]
Debt Instrument, Fair Value Disclosure	496.1
Debt Instrument, Face Amount	$ 500.0
Debt Instrument, Maturity Date	Jun. 15, 2028
Fair Value, Inputs, Level 2 [Member] \| $750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member]
Statement [Line Items]
Debt Instrument, Face Amount	$ 750.0
Debt Instrument, Maturity Date	Mar. 15, 2025
Fair Value, Inputs, Level 2 [Member] \| $750.0 Million Fixed Rate Notes Due March 2030, Interest Equal to 4.4%
Statement [Line Items]
Debt Instrument, Fair Value Disclosure	$ 751.4

Operating Lease Future Minimum Payments (Details) $ in Millions	Mar. 31, 2026 USD ($)
Operating Leases, Future Minimum Payments Due [Line Items]
Remainder of 2026	$ 42.8
2027	49.5
2028	43.8
2029	33.2
2030	32.2
2031	30.3
Thereafter	80.0
Total Operating Lease Payments	311.8
Operating Lease Payments, Less Imputed Interest	(41.3)
Present Value of Operating Lease Liability	$ 270.5

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2026

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 March 31,
(in thousands)		2026	2025

Stock awards		34	44
Total		34	44

Basic And Diluted Earnings Per Share

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


	Quarter Ended March 31,
		2026		2025
Net Income (in millions)		$	1,154.3	$	956.2
Less: preferred stock dividends		—		(5.7)
Add: overdistributed earnings allocated to preferred stock		13.7		—
Less: undistributed earnings allocated to preferred stock		—		(6.3)
Net Income Attributable to Common Shareholders of CME Group - Basic		$	1,168.0	$	944.2
Less: overdistributed earnings allocated to preferred stock		(13.7)		—
Net Income Attributable to Common Shareholders of CME Group - Diluted		$	1,154.3	$	944.2

Weighted Average Number of Common Shares (in thousands):
Basic		359,318		359,613
Effect of restricted stock and performance shares		682		614
Effect of convertible preferred shares		3,208		—
Diluted		363,208		360,227
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic		$	3.25	$	2.63
Diluted		3.18		2.62

Fair Value Measurements

3 Months Ended

Mar. 31, 2026

Fair Value by Fair Value Hierarchy Level, Extensible Enumeration [Abstract]

Fair Value Measurements

The company uses a three-level classification hierarchy of fair value measurements for disclosure purposes:

•Level 1 inputs, which are considered the most reliable evidence of fair value, consist of quoted prices (unadjusted) for identical assets or liabilities in active markets.

•Level 2 inputs consist of observable market data, such as quoted prices for similar assets and liabilities in active markets, or inputs other than quoted prices that are directly observable.

•Level 3 inputs consist of unobservable inputs which are derived and cannot be corroborated by market data or other entity-specific inputs.

The company’s level 1 assets generally include investments in publicly traded mutual funds, equity securities and corporate debt securities with quoted market prices. In general, the company uses quoted prices in active markets for identical assets to determine the fair value of marketable securities.

The company’s level 2 assets and liabilities generally consist of long-term debt notes. The fair values of the long-term debt notes were based on quoted market prices in an inactive market.

The company’s level 3 assets and liabilities include certain investments that were adjusted to fair value.

Recurring Fair Value Measurements. Financial assets and liabilities recorded at fair value on the consolidated balance sheet as of March 31, 2026 were classified in their entirety based on the lowest level of input that was significant to each asset and liability’s fair value measurement. The following table presents financial instruments measured at fair value on a recurring basis:


	March 31, 2026
(in millions)	Level 1		Level 2		Level 3		Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities	$	6.9	$	—	$	—	$	6.9

Mutual funds	116.0		—		—		116.0
Equity securities	1.3		—		—		1.3

Total Marketable Securities	124.2		—		—		124.2





Total Assets at Fair Value	$	124.2	$	—	$	—	$	124.2

Non-Recurring Fair Value Measurements. The company recognized an impairment charge of $28.9 million related to two of its privately-held equity investments. The fair value of one of the investments was estimated to be zero at the impairment date and the fair value of the other investment was estimated to be $1.6 million at the impairment date. The company also recognized unrealized gains on investments of $4.8 million on equity investments without readily determinable fair values during the first quarter of 2026. The fair value of these investments were estimated to be $18.2 million at March 31, 2026. This fair value assessment was based on quantitative factors, including observable price changes. The fair value measurement of these investments are considered level 3 and non-recurring. These investments are included in other assets on the consolidated balance sheet.

Fair Values of Debt Notes. The following presents the estimated fair values of short-term and long-term debt notes, which are carried at amortized cost on the consolidated balance sheets. The fair values below are classified as level 2 under the fair value hierarchy and were estimated using quoted market prices in inactive markets.

At March 31, 2026, the fair values were as follows:


(in millions)	Fair Value		Level

$500.0 million fixed rate notes due June 2028	$	496.1	Level 2
$750.0 million fixed rate notes due March 2030	751.4		Level 2
$750.0 million fixed rate notes due March 2032	679.9		Level 2
$750.0 million fixed rate notes due September 2043	732.6		Level 2
$700.0 million fixed rate notes due June 2048	571.8		Level 2

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2026	Apr. 08, 2026
Statement [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Entity File Number	001-31553
Entity Registrant Name	CME GROUP INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-4459170
Entity Address, Street Address	20 South Wacker Drive
Entity Address, City	Chicago
Entity Address, State	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	930-1000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of each class	Class A Common Stock
Trading symbol	CME
Name of each exchange on which registered	NASDAQ
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2026
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001156375
Amendment Flag	false
Class A Common Stock [Member]
Statement [Line Items]
Entity Common Stock, Shares Outstanding		362,356,209
Class B Common Stock, Class B-1 [Member]
Statement [Line Items]
Entity Common Stock, Shares Outstanding		625
Class B Common Stock, Class B-2 [Member]
Statement [Line Items]
Entity Common Stock, Shares Outstanding		813
Class B Common Stock, Class B-3 [Member]
Statement [Line Items]
Entity Common Stock, Shares Outstanding		1,287
Class B Common Stock, Class B-4 [Member]
Statement [Line Items]
Entity Common Stock, Shares Outstanding		413

Revenue Recognition (Notes)

3 Months Ended

Mar. 31, 2026

Revenue Recognition [Abstract]

Revenue Recognition, Deferred Revenue [Policy Text Block]

Revenue Recognition

The company generates revenue from customers from the following sources:

Clearing and transaction fees. Clearing and transaction fees include per-contract charges for trade matching, clearing, trading on the company's electronic trading platforms, portfolio reconciliation and compression services, risk mitigation, and other fees. Clearing and transaction fees are assessed upfront at the time of trade execution. As such, the company recognizes the majority of the fee revenue upon successful execution of the trade. The minimal remaining portion of the fee revenue related to settlement activities performed after trade execution is recognized over the short-term period that the contract is outstanding, based on management’s estimates of the average contract lifecycle. These estimates are based on various assumptions to approximate the amount of fee revenue to be attributed to services performed through contract settlement, expiration, or termination. For cleared trades, these assumptions include the average number of days that a contract remains in open interest, contract turnover, average revenue per day, and revenue remaining in open interest at the end of each period.

The nature of contracts gives rise to several types of variable consideration, including volume-based pricing tiers, customer incentives associated with market maker programs and other fee discounts. The company includes fee discounts and incentives in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee reduction. These estimates are based on historical experience, anticipated performance, and best judgment at the time. Because of the company's certainty in estimating these amounts, they are included in the transaction price of contracts.

Market data and information services. Market data and information services represent revenue from the dissemination of market data to subscribers, distributors, and other third-party licensees of market data. Pricing for market data is primarily based on the number of reportable devices used as well as the number of subscribers enrolled under the arrangement. Fees for these services are generally billed monthly. Market data services are satisfied over time and revenue is recognized on a monthly basis as the customers receive and consume the benefit of the market data services. However, the company also maintains certain annual license arrangements with one-time upfront fees. The fees for annual licenses are initially recorded as a contract liability and recognized as revenue monthly over the term of the annual period.

Other. Other revenues include certain access and communication fees, fees for collateral management, equity membership subscription fees, and fees for trade order routing through agreements from various strategic relationships. Access and communication fees are charged to customers that utilize various telecommunications networks and communications services. Fees for these services are generally billed monthly and the associated fee revenue is recognized as billed. Collateral management fees are charged to clearing firms that have collateral on deposit with the clearing house to meet their minimum performance bond and guaranty fund obligations on the exchange. These fees are calculated based on daily collateral balances

and are billed monthly. This fee revenue is recognized monthly as billed as the customers receive and consume the benefits of the services. The company also has an equity membership program which provides equity members the option to pay a monthly subscription fee in satisfaction of their existing requirement to hold CME Group Class A common stock. Choosing to pay this fee in lieu of holding Class A shares is entirely voluntary and the client's choice. Fee revenue under this program is earned monthly as billed over the contractual term. Pricing for strategic relationships may be driven by customer levels and activity. There are fee arrangements which provide for monthly as well as quarterly payments in arrears. Revenue is recognized monthly for strategic relationship arrangements as the customers receive and consume the benefits of the services.

The following table represents a disaggregation of revenue from contracts with customers by product line for the quarters ended March 31, 2026 and 2025:


	Quarter Ended March 31,
(in millions)		2026		2025
Interest rates		$	521.2	$	436.3
Equity indexes		315.6		304.2
Foreign exchange		56.8		53.4
Agricultural commodities		167.5		164.3
Energy		263.7		216.4
Metals		118.4		70.9
BrokerTec fixed income		40.2		35.9
EBS foreign exchange		36.4		35.1
Interest rate swap		22.8		20.8
Total clearing and transaction fees		1,542.6		1,337.3
Market data and information services		224.1		194.5
Other		113.4		110.5
Total revenues		$	1,880.1	$	1,642.3

Timing of Revenue Recognition
Services transferred at a point in time		$	1,517.0	$	1,309.1
Services transferred over time		357.3		328.2
One-time charges and miscellaneous revenues		5.8		5.0
Total revenues		$	1,880.1	$	1,642.3

The timing of revenue recognition, billings and cash collections results in billed accounts receivable, and customer advances and deposits (contract liabilities) on the consolidated balance sheets. Certain fees for transactions, annual licenses, and other revenue arrangements are billed upfront before revenue is recognized, which results in the recognition of contract liabilities. These liabilities are recognized on the consolidated balance sheets on a contract-by-contract basis upon commencement of services under the customer contract. These upfront customer payments are recognized as revenue over time as the obligations under the contracts are satisfied. Changes in the contract liability balances during the first quarter of 2026 were not materially impacted by any other factors. The balance of contract liabilities was $69.6 million and $16.7 million as of March 31, 2026 and December 31, 2025, respectively.

Debt Narrative (details) (Details) - USD ($) $ in Millions	1 Months Ended
Debt Narrative (details) (Details) - USD ($) $ in Millions	Sep. 30, 2013	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Forward starting interest rate swap agreement fixed rate	4.73%
Long-term debt		$ 3,423.2	$ 3,422.3
$750.0 Million Fixed Rate Notes Due March 2030, Interest Equal To 4.4% [Abstract]
Debt Instrument [Line Items]
Long-term debt		742.6	742.1
$750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Interest Rate, Stated Percentage		3.00%
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Interest Rate, Stated Percentage		3.00%
$500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain]
Debt Instrument [Line Items]
Long-term debt		$ 499.1	$ 498.9
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Interest Rate, Stated Percentage		4.40%
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Interest Rate, Stated Percentage		4.40%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.9-06)
-Publisher FASB
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+ Details

Earnings Per Share

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Earnings Per Share

The company uses the two-class method for basic EPS and the if-converted method for diluted EPS. This reflects the Series G preferred stock’s status as participating securities until their 1:1 conversion into 4.6 million Class A common shares on March 5, 2026. Under the two-class method, undistributed or overdistributed earnings are allocated to common stock and participating securities according to their respective rights in undistributed or overdistributed earnings, as if all the earnings for the period had been distributed. Basic earnings per common share is computed by dividing the net income attributable to common shareholders by the weighted average number of common shares outstanding during the period. Net income attributable to common shareholders is reduced for preferred stock dividends earned during the period. Preferred stock also receives a proportionate allocation of undistributed or overdistributed earnings for the period because the shares of the Series G preferred stock have a contractual obligation to share in profits and losses of the company. Diluted earnings per share is computed using the if-converted method for the Series G preferred stock which assumes the conversion of all preferred shares into common shares at the beginning of the period. Accordingly, net income attributable to common shareholders is adjusted to add back the dividends and undistributed or overdistributed earnings previously allocated to the preferred stock, and the weighted average number of common shares outstanding is increased by the number of shares that would have been issued upon conversion of the preferred stock as of the beginning of the period plus potentially dilutive common shares. Anti-dilutive stock awards were as follows for the periods presented:


	Quarter Ended March 31,
(in thousands)		2026	2025

Stock awards		34	44
Total		34	44

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


	Quarter Ended March 31,
		2026		2025
Net Income (in millions)		$	1,154.3	$	956.2
Less: preferred stock dividends		—		(5.7)
Add: overdistributed earnings allocated to preferred stock		13.7		—
Less: undistributed earnings allocated to preferred stock		—		(6.3)
Net Income Attributable to Common Shareholders of CME Group - Basic		$	1,168.0	$	944.2
Less: overdistributed earnings allocated to preferred stock		(13.7)		—
Net Income Attributable to Common Shareholders of CME Group - Diluted		$	1,154.3	$	944.2

Weighted Average Number of Common Shares (in thousands):
Basic		359,318		359,613
Effect of restricted stock and performance shares		682		614
Effect of convertible preferred shares		3,208		—
Diluted		363,208		360,227
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic		$	3.25	$	2.63
Diluted		3.18		2.62

Contingencies	3 Months Ended
Contingencies	Mar. 31, 2026
Loss Contingency [Abstract]
Contingencies	Contingencies Legal and Regulatory Matters. In the normal course of business, the company discusses matters with its regulators raised during regulatory examinations or otherwise subject to their inquiry and oversight. These matters could result in censures, fines, penalties or other sanctions. Management believes the outcome of any resulting actions will not have a material impact on the company's consolidated financial position or results of operations. However, the company is unable to predict the outcome or the timing of the ultimate resolution of these matters, or the potential fines, penalties or injunctive or other equitable relief, if any, that may result from these matters. A putative class action complaint was filed January 15, 2014 in the Circuit Court of Cook County, Chancery Division, against CME Group Inc. and the Board of Trade of the City of Chicago, Inc. The plaintiffs, certain Class B shareholders of CME Group and Class B members of CBOT, allege breach of contract and breach of the implied covenant of good faith and fair dealing for violations of their core rights granted in the defendants’ respective Certificates of Incorporation. On December 2, 2021, the court granted the plaintiffs’ motion for certification of a damages-only class. In early 2024, the defendants moved for summary judgment on all claims. On April 16, 2025, the court granted the motion in part and denied the motion in part, and set the remaining claims for a jury trial. After a three week trial, on July 25, 2025, the jury returned a unanimous verdict in favor of the defendants on all counts. Plaintiffs have filed a post-trial motion seeking a new trial, and we expect the plaintiffs to appeal the verdict should the post-trial motions be denied. In addition, the company is a defendant in, and has potential for, various other legal proceedings arising from its regular business activities. While the ultimate results of such proceedings against the company cannot be predicted with certainty, the company believes that the resolution of any of these matters on an individual or aggregate basis will not have a material impact on its consolidated financial position or results of operations. No accrual was required for contingent legal and regulatory matters as none were probable and estimable as of March 31, 2026 and December 31, 2025.

- Definition

The entire disclosure for loss and gain contingencies. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible loss incurred by an entity that will ultimately be resolved when one or more future events occur or fail to occur, and typically discloses the amount of loss recorded or a range of possible loss, or an assertion that no reasonable estimate can be made.

+ References

+ Details

Performance Bonds and Guaranty Fund Contributions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Guarantor Obligations [Line Items]
Average Daily Clearing Settlement	$ 9,200.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	167,432.9	$ 122,106.1	$ 164,079.5	$ 101,794.1
Margin Deposits And Guaranty Funds Liabilities Current	165,035.3		$ 159,656.1
Other non-operating income (expense)	(1,246.9)	(802.4)
Investment income	1,389.3	892.7
Total Revenues	1,880.1	1,642.3
Interest from Performance Bonds [Member]
Guarantor Obligations [Line Items]
Total Revenues	1,371.1	873.6
Expense related to Performance Bonds
Guarantor Obligations [Line Items]
Other non-operating income (expense)	1,249.2	$ 804.8
Federal Reserve Bank Advances
Guarantor Obligations [Line Items]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 144,300.0

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	$ 26,618.2		$ 28,728.2
Other comprehensive income (loss), net of tax	(22.5)	$ 30.7
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	(0.1)	(0.1)	0.0	$ (0.3)
Other Comprehensive Income (Loss), before Tax	(0.1)	0.2
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Income tax benefit (expense)	0.0	0.0
Other comprehensive income (loss), net of tax	(0.1)	0.2
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	(1.4)	(15.0)	0.3	(14.1)
Other Comprehensive Income (Loss), before Tax	(2.1)	(1.2)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Income tax benefit (expense)	0.4	0.3
Other comprehensive income (loss), net of tax	(1.7)	(0.9)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	55.4	58.6	56.2	59.3
Other Comprehensive Income (Loss), before Tax	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss)	(1.1)	(0.9)
Income tax benefit (expense)	0.3	0.2
Other comprehensive income (loss), net of tax	(0.8)	(0.7)
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	5.5	(118.3)	25.4	(150.4)
Other Comprehensive Income (Loss), before Tax	(21.9)	35.6
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Income tax benefit (expense)	2.0	(3.5)
Other comprehensive income (loss), net of tax	(19.9)	32.1
Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	59.4	(74.8)	$ 81.9	$ (105.5)
Other Comprehensive Income (Loss), before Tax	(24.1)	34.6
Amounts reclassified from accumulated other comprehensive income (loss)	(1.1)	(0.9)
Income tax benefit (expense)	2.7	(3.0)
Other comprehensive income (loss), net of tax	$ (22.5)	$ 30.7

Intangible Assets And Goodwill (Tables)

3 Months Ended

Mar. 31, 2026

Intangible Asset, Goodwill and Other [Abstract]

Components of intangible assets

Intangible assets consisted of the following at March 31, 2026 and December 31, 2025:


	March 31, 2026				December 31, 2025
(in millions)	Assigned Value		Accumulated Amortization		Net Book Value		Assigned Value		Accumulated Amortization		Net Book Value
Amortizable Intangible Assets:
Clearing firm, market data and other customer relationships	$	4,696.0	$	(2,608.2)	$	2,087.8	$	4,703.0	$	(2,557.5)	$	2,145.5

Technology-related intellectual property	62.5		(62.5)		—		62.5		(62.5)		—
Other	73.1		(60.1)		13.0		73.9		(58.7)		15.2
Total amortizable intangible assets	$	4,831.6	$	(2,730.8)	$	2,100.8	$	4,839.4	$	(2,678.7)	$	2,160.7

Indefinite-Lived Intangible Assets:
Trade names					450.0						450.0
Total intangible assets – other, net					$	2,550.8					$	2,610.7
Trading products (1)					$	17,175.3					$	17,175.3

(1)Trading products represent futures and options products acquired in our business combinations with CBOT Holdings, Inc., NYMEX Holdings, Inc. and The Board of Trade of Kansas City, Missouri, Inc. Clearing and transaction fees are generated through the trading of these products. These trading products, most of which have traded for decades, require authorization from the Commodity Futures Trading Commission (CFTC). Product authorizations from the CFTC have no term limits.

Future estimated amortization expense

As of March 31, 2026, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:


(in millions)	Amortization Expense
Remainder of 2026	$	166.8
2027	221.0
2028	214.5
2029	214.5
2030	214.5
2031	214.5
Thereafter	855.0

Goodwill

Goodwill activity consisted of the following for the periods ended March 31, 2026 and December 31, 2025:


(in millions)	Goodwill
Balance at December 31, 2024	$	10,486.9
Foreign currency translation	27.8
Balance at December 31, 2025	10,514.7
Foreign currency translation	(8.7)
Balance at March 31, 2026	$	10,506.0

- Definition

Tabular disclosure of goodwill.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
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-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

+ Details

Lease Cash Flow Infomation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating Lease, Payments	$ 14.1	$ 15.1
Finance Lease, Principal Payments	$ 4.4	$ 4.4

Fair Value Measurements (Narrative) (Details) $ in Millions	3 Months Ended
Fair Value Measurements (Narrative) (Details) $ in Millions	Mar. 31, 2026 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unrealized Loss on Investments	$ 4.8
Investments, Fair Value Disclosure	18.2
Other Investment Not Readily Marketable, Fair Value	1.6
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount	28.9
Equity Securities without Readily Determinable Fair Value, Amount	$ 0.0

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References + Details

Earnings Per Share (Narrative) (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	34	44
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	34	44

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Revenue Recognition [Abstract]
Deferred Revenue	$ 69.6		$ 16.7
Disaggregation of Revenue [Line Items]
Total Revenues	1,880.1	$ 1,642.3
Services transferred at a point in time [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,517.0	1,309.1
Services transferred over time [Member]
Disaggregation of Revenue [Line Items]
Revenues	357.3	328.2
One-time charges and miscellaneous revenues [Member]
Disaggregation of Revenue [Line Items]
Revenues	5.8	5.0
Clearing and transaction fees [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,542.6	1,337.3
Total Revenues	1,542.6	1,337.3
Clearing and transaction fees [Member] \| Interest rate [Member]
Disaggregation of Revenue [Line Items]
Revenues	521.2	436.3
Clearing and transaction fees [Member] \| Equities [Member]
Disaggregation of Revenue [Line Items]
Revenues	315.6	304.2
Clearing and transaction fees [Member] \| Foreign Exchange [Member]
Disaggregation of Revenue [Line Items]
Revenues	56.8	53.4
Clearing and transaction fees [Member] \| Agricultural commodity [Member]
Disaggregation of Revenue [Line Items]
Revenues	167.5	164.3
Clearing and transaction fees [Member] \| Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues	263.7	216.4
Clearing and transaction fees [Member] \| Metal [Member]
Disaggregation of Revenue [Line Items]
Revenues	118.4	70.9
Clearing and transaction fees [Member] \| BrokerTec Fixed Income
Disaggregation of Revenue [Line Items]
Revenues	40.2	35.9
Clearing and transaction fees [Member] \| EBS Foreign Exchange
Disaggregation of Revenue [Line Items]
Revenues	36.4	35.1
Clearing and transaction fees [Member] \| Interest Rate Swap [Member]
Disaggregation of Revenue [Line Items]
Revenues	22.8	20.8
Market data and information services
Disaggregation of Revenue [Line Items]
Revenues	224.1	194.5
Total Revenues	224.1	194.5
Other
Disaggregation of Revenue [Line Items]
Revenues	113.4	110.5
Total Revenues	$ 113.4	$ 110.5

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,154.3	$ 956.2
Other comprehensive income (loss), net of tax:
Net unrealized holding gains (losses) arising during the period	(0.1)	0.2
Investment securities, net	(0.1)	0.2
Net change in defined benefit plans arising during the period	(2.1)	(1.2)
Income tax benefit (expense)	0.4	0.3
Defined benefit plans, net	(1.7)	(0.9)
Reclassification of net unrealized (gains) losses to interest expense and other non-operating income (expense)	(1.1)	(0.9)
Income tax benefit (expense)	0.3	0.2
Derivative investments, net	(0.8)	(0.7)
Foreign currency translation adjustments	(21.9)	35.6
Income tax benefit (expense)	2.0	(3.5)
Foreign currency translation, net	(19.9)	32.1
Other comprehensive income (loss), net of tax	(22.5)	30.7
Comprehensive Income	$ 1,131.8	$ 986.9

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Debt (Schedule Of Short-Term And Long-Term Debt) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Sep. 30, 2013	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Long-term debt		$ 3,423.2	$ 3,422.3
Forward starting interest rate swap agreement fixed rate	4.73%
$750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Maturity Date		Mar. 15, 2025
Debt Instrument, Interest Rate, Stated Percentage		3.00%
$500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain]
Debt Instrument [Line Items]
Long-term debt		$ 499.1	498.9
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Maturity Date		Mar. 15, 2030
Debt Instrument, Interest Rate, Stated Percentage		4.40%
$750.0 million Fixed Rate Notes Due September 2043, stated rate of 5.30% [Member]
Debt Instrument [Line Items]
Long-term debt		$ 744.7	744.6
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Maturity Date		Sep. 15, 2043
Debt Instrument, Interest Rate, Stated Percentage		5.30%
$700.0 Million Fixed Rate Notes Due June 2048, stated rate of 4.15% [Member] [Domain] [Domain]
Debt Instrument [Line Items]
Long-term debt		$ 692.0	692.1
Debt Instrument, Face Amount		$ 700.0
Debt Instrument, Maturity Date		Jun. 15, 2048
Debt Instrument, Interest Rate, Stated Percentage		4.15%
$750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65%
Debt Instrument [Line Items]
Long-term debt		$ 744.8	744.6
Debt Instrument, Face Amount		$ 750.0
Debt Instrument, Maturity Date		Mar. 15, 2032
Debt Instrument, Interest Rate, Stated Percentage		2.65%
$750.0 Million Fixed Rate Notes Due March 2030, Interest Equal To 4.4% [Abstract]
Debt Instrument [Line Items]
Long-term debt		$ 742.6	$ 742.1
$500.0 Million Fixed Rate Notes Due June 2028, Interest Equal To 3.75% [Domain]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500.0
Debt Instrument, Maturity Date		Jun. 15, 2028
Debt Instrument, Interest Rate, Stated Percentage		3.75%

Guarantees (Details)	3 Months Ended
Guarantees (Details)	Mar. 31, 2026 USD ($) years
Guarantor Obligations [Line Items]
Agreement automatic renewal period (in years) \| years	2
Contingent liability to SGX, amount of irrevocable letters of credit	$ 400,000,000.0
Line of Credit Facility, Commitment Fee Amount	350,000,000.0
Family Farmer and Ranchers Protection Fund [Member]
Guarantor Obligations [Line Items]
Payment per participant	25,000
Payment per cooperative	100,000
FutureLosses	100,000,000.0
Payments under Guarantee	2,000,000.0
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 98,000,000.0

Intangible Assets And Goodwill (Components Of Intangible Assets) (Details) - USD ($)
$ in Millions

Mar. 31, 2026

Dec. 31, 2025

Intangible Assets [Line Items]

Intangible assets—other, net

$ 2,550.8

$ 2,610.7

Intangible assets—other, net

2,550.8

2,610.7

Intangible assets—trading products

^[1]

17,175.3

Trade Names [Member]

Intangible Assets [Line Items]

Total intangible assets - other, net

450.0

Clearing Firm, Market Data And Other Customer Relationships [Member]

Intangible Assets [Line Items]

Assigned Value

4,696.0

4,703.0

Accumulated amortization

(2,608.2)

(2,557.5)

Intangible assets—other, net

2,087.8

2,145.5

Intangible Assets [Line Items]

Assigned Value

62.5

Accumulated amortization

(62.5)

Intangible assets—other, net

0.0

Other [Member]

Intangible Assets [Line Items]

Assigned Value

73.1

73.9

Accumulated amortization

(60.1)

(58.7)

Intangible assets—other, net

13.0

15.2

Total Amortizable Intangible Assets [Member]

Intangible Assets [Line Items]

Assigned Value

4,831.6

4,839.4

Accumulated amortization

(2,730.8)

(2,678.7)

Intangible assets—other, net

$ 2,100.8

$ 2,160.7

[1]

Leases (Details)	Mar. 31, 2026
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	12
Lessee, Operating Lease, Renewal Term	5
Lessee, Operating Lease, Option to Terminate	12
Lessee, Operating Lease, Term of Contract	12

Earnings Per Share (Net Income Attributable To CME Group) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Dividends, Preferred Stock	$ 0.0	$ (5.7)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	13.7	0.0
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	0.0	(6.3)
Net Income (Loss) Available to Common Stockholders, Basic	1,168.0	944.2
Overdistributed earnings allocated to preferred stock [Abstract]	(13.7)	0.0
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted	$ 1,154.3	$ 944.2
Basic (in shares)	359,318	359,613
Effect of stock options, restricted stock and performance shares	682	614
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock	3,208	0
Diluted (in shares)	363,208	360,227
Earnings per common share, basic (in dollars per share)	$ 3.25	$ 2.63
Earnings per common share, diluted (in dollars per share)	$ 3.18	$ 2.62

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues
Total Revenues	$ 1,880.1	$ 1,642.3
Expenses
Compensation and benefits	223.0	206.7
Technology	76.6	65.7
Professional fees and outside services	28.2	28.5
Amortization of purchased intangibles	56.1	55.2
Depreciation and amortization	27.2	27.3
Licensing and other fee agreements	106.8	96.6
Other	52.5	54.3
Total Expenses	570.4	534.3
Operating Income	1,309.7	1,108.0
Non-Operating Income (Expense)
Investment income	1,389.3	892.7
Interest and other borrowing costs	(43.6)	(41.7)
Equity in net earnings of unconsolidated subsidiaries	102.4	88.2
Other non-operating income (expense)	(1,246.9)	(802.4)
Total Non-Operating Income (Expense)	201.2	136.8
Income before Income Taxes	1,510.9	1,244.8
Income tax provision	356.6	288.6
Net Income	1,154.3	956.2
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,168.0	$ 944.2
Earnings per Share Attributable to Common Shareholders of CME Group:
Basic (in dollars per share)	$ 3.25	$ 2.63
Diluted (in dollars per share)	$ 3.18	$ 2.62
Weighted Average Number of Common Shares:
Basic (in shares)	359,318	359,613
Diluted (in shares)	363,208	360,227
Clearing and transaction fees [Member]
Revenues
Total Revenues	$ 1,542.6	$ 1,337.3
Market data and information services
Revenues
Total Revenues	224.1	194.5
Other
Revenues
Total Revenues	$ 113.4	$ 110.5

Accounting Policies (Policies)	3 Months Ended
Accounting Policies (Policies)	Mar. 31, 2026
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy	Newly Adopted Accounting Policies. In July 2025, the FASB issued an accounting standards update which provides a practical expedient when estimating the amount of expected credit losses on current accounts receivable and current contract assets. This update permits entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the current accounts receivable and current contract assets. Therefore, entities will not need to develop reasonable and supportable forecasts of future economic conditions. The practical expedient must be applied consistently across all current accounts receivable and current contract assets. The Company adopted this standard on January 1, 2026, and has elected to apply the practical expedient. The adoption of this guidance did not have a material impact on our consolidated financial statements.

Basis Of Presentation	3 Months Ended
Basis Of Presentation	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	Basis of Presentation The consolidated financial statements consist of CME Group Inc. (CME Group) and its subsidiaries (collectively, the company), including Chicago Mercantile Exchange Inc. (CME), Board of Trade of the City of Chicago, Inc. (CBOT), New York Mercantile Exchange, Inc. (NYMEX), Commodity Exchange, Inc. (COMEX) and NEX Group Limited (NEX). The clearing house is operated by CME. The accompanying interim consolidated financial statements have been prepared by CME Group without audit. Certain notes and other information normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted. In the opinion of management, the accompanying consolidated financial statements include all adjustments (consisting only of normal recurring adjustments) considered necessary to present fairly the financial position of the company at March 31, 2026 and December 31, 2025 and the results of operations and cash flows for the periods indicated. Quarterly results are not necessarily indicative of results for any subsequent period. The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto in CME Group’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Securities and Exchange Commission (SEC) on February 26, 2026.

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock And Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Parent [Member]	Class A Common Stock [Member]	Class A Common Stock [Member] Common Stock And Additional Paid-In Capital [Member]	Class B Common Stock [Member]	Class B Common Stock [Member] Common Stock And Additional Paid-In Capital [Member]	Preferred Stock [Member] Common Stock And Additional Paid-In Capital [Member]
Statement [Line Items]
Share Repurchase Program, Authorized, Amount	$ 3,000.0
Balance (in shares) at Dec. 31, 2024							359,602,000		3,000	4,584,000
Balance at Dec. 31, 2024		$ 22,406.6	$ 4,185.8	$ (105.5)	$ 26,486.9
Statement [Line Items]
Net Income			956.2		956.2
Net Income	956.2
Other comprehensive income (loss), net of tax	30.7			30.7	30.7
Dividends, Cash			(456.1)		(456.1)
Vesting of issued restricted Class A common stock, shares							44,000
Vesting of issued restricted Class A common stock		(8.2)			(8.2)
Stock-based compensation		21.2			21.2
Balance (in shares) at Mar. 31, 2025							359,646,000		3,000	4,584,000
Balance at Mar. 31, 2025		22,419.6	4,685.9	(74.8)	27,030.7
Balance (in shares) at Dec. 31, 2025						358,950,000	358,950,000	3,000	3,000	4,584,000
Balance at Dec. 31, 2025	28,728.2	22,213.1	6,433.2	81.9	28,728.2
Statement [Line Items]
Net Income			1,154.3		1,154.3
Net Income	1,154.3
Other comprehensive income (loss), net of tax	(22.5)			(22.5)	(22.5)
Dividends, Cash			(2,702.9)		(2,702.9)
Vesting of issued restricted Class A common stock, shares							94,000
Vesting of issued restricted Class A common stock		(22.0)			(22.0)
Stock Repurchased During Period, Value		(538.7)			(538.7)
Stock-based compensation		21.8			21.8
Balance (in shares) at Mar. 31, 2026						361,790,000	361,790,000	3,000	3,000	0
Balance at Mar. 31, 2026	$ 26,618.2	$ 21,674.2	$ 4,884.6	$ 59.4	$ 26,618.2
Statement [Line Items]
Shares Acquired, Average Cost Per Share	$ 291.58
Preferred Stock, Convertible, Shares Issuable	(4,584,000)
Stock Repurchased During Period, Shares						1,838,492
Stock Repurchased and Retired During Period, Shares						1,838,000
Preferred Stock, Conversion Basis	4,584,000
Share Repurchase Program, Remaining Authorized, Amount	$ 2,200.0

Finance Lease Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Leases [Abstract]
Finance Lease, Right-of-Use Asset	$ 43.3	$ 45.5
Finance Lease, Liability, Current	9.1	9.0
Finance Lease, Liability, Noncurrent	39.4	41.7
Finance Lease, Liability	$ 48.5	$ 50.7
Finance Lease, Weighted Average Remaining Lease Term	60 months	63 months
Finance Lease, Weighted Average Discount Rate, Percent	3.50%	3.50%

Intangible Assets And Goodwill (Future Estimated Amortization Expense) (Details) $ in Millions	Mar. 31, 2026 USD ($)
Intangible Asset, Goodwill and Other [Abstract]
Remainder of 2026	$ 166.8
2027	221.0
2028	214.5
2029	214.5
2030	214.5
2031	214.5
Thereafter	$ 855.0

Lease Expenses (Details) - USD ($) $ in Millions	3 Months Ended
Lease Expenses (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating Lease, Cost	$ 11.9	$ 9.7
Short-term Lease, Cost	0.1	0.1
Operating Lease, Expense	12.0	9.8
Finance Lease, Interest Expense	0.4	0.5
Finance Lease, Right-of-Use Asset, Amortization	2.2	2.2
Finance Lease, Expense	2.6	2.7
Sublease Income	$ 3.9	$ 2.9

Intangible Assets And Goodwill

3 Months Ended

Mar. 31, 2026

Intangible Asset, Goodwill and Other [Abstract]

Intangible Assets And Goodwill

Intangible Assets and Goodwill

Intangible assets consisted of the following at March 31, 2026 and December 31, 2025:


	March 31, 2026				December 31, 2025
(in millions)	Assigned Value		Accumulated Amortization		Net Book Value		Assigned Value		Accumulated Amortization		Net Book Value
Amortizable Intangible Assets:
Clearing firm, market data and other customer relationships	$	4,696.0	$	(2,608.2)	$	2,087.8	$	4,703.0	$	(2,557.5)	$	2,145.5

Technology-related intellectual property	62.5		(62.5)		—		62.5		(62.5)		—
Other	73.1		(60.1)		13.0		73.9		(58.7)		15.2
Total amortizable intangible assets	$	4,831.6	$	(2,730.8)	$	2,100.8	$	4,839.4	$	(2,678.7)	$	2,160.7

Indefinite-Lived Intangible Assets:
Trade names					450.0						450.0
Total intangible assets – other, net					$	2,550.8					$	2,610.7
Trading products (1)					$	17,175.3					$	17,175.3

Total amortization expense for intangible assets was $56.1 million and $55.2 million for the quarters ended March 31, 2026 and 2025, respectively. During the quarter ended March 31, 2026, the net book value of amortizable intangible assets included $3.9 million of foreign currency translation for the period.

As of March 31, 2026, the future estimated amortization expense related to amortizable intangible assets is expected to be as follows:


(in millions)	Amortization Expense
Remainder of 2026	$	166.8
2027	221.0
2028	214.5
2029	214.5
2030	214.5
2031	214.5
Thereafter	855.0

Goodwill activity consisted of the following for the periods ended March 31, 2026 and December 31, 2025:


(in millions)	Goodwill
Balance at December 31, 2024	$	10,486.9
Foreign currency translation	27.8
Balance at December 31, 2025	10,514.7
Foreign currency translation	(8.7)
Balance at March 31, 2026	$	10,506.0

Operating Lease Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 198.7	$ 210.3
Operating Lease, Liability, Current	46.2	46.8
Operating Lease, Liability, Noncurrent	224.3	237.4
Operating Lease, Liability	$ 270.5	$ 284.2
Operating Lease, Weighted Average Remaining Lease Term	97 months	99 months
Operating Lease, Weighted Average Discount Rate, Percent	4.10%	4.10%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent

Consolidated Statements Of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock, per share (in dollars per share)	$ 7.45	$ 1.25

Debt (Tables)

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt consisted of the following at March 31, 2026 and December 31, 2025:


(in millions)	March 31, 2026		December 31, 2025
$500.0 million fixed rate notes due June 2028, stated rate of 3.75%	$	499.1	$	498.9
$750.0 million fixed rate notes due March 2030, stated rate of 4.40%	742.6		742.1
$750.0 million fixed rate notes due March 2032, stated rate of 2.65%	744.8		744.6
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% (1)	744.7		744.6
$700.0 million fixed rate notes due June 2048, stated rate of 4.15%	692.0		692.1
Total long-term debt	$	3,423.2	$	3,422.3

Schedule of Short-term Debt

Schedule of Maturities of Long-term Debt [Table Text Block]

Long-term debt maturities, at par value, were as follows at March 31, 2026:


(in millions)	Par Value
2027	$	—
2028	500.0
2029	—
2030	750.0
2031	—
Thereafter	2,200.0

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.9-06)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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