[Form 4] CME GROUP INC. Insider Trading Activity

Rhea-AI Filing Summary

Jack J. Tobin, MD Chief Accounting Officer of CME Group (CME), reported routine equity transactions tied to tax-withholding on vested restricted stock. The filing discloses three non-derivative transactions: on 09/15/2025 Mr. Tobin disposed of 143 shares at $258.83 to satisfy tax withholding and simultaneously acquired 1,546 shares at $258.83, leaving him with 25,142 shares after that activity. On 09/16/2025 he disposed of 57 shares at $259.83 for additional tax withholding, leaving 25,085 shares beneficially owned. The transactions are described as share surrenders to satisfy tax obligations upon vesting of restricted stock.

Insights

Corporate Governance Expert

TL;DR: Routine tax-withholding share surrenders by an officer; no new material disclosure or change in control.

The filing documents common, administrative equity movements where vested restricted shares were surrendered to the issuer to cover tax obligations. Such transactions are typical of equity compensation plans and do not indicate open-market selling or change in ownership strategy. Post-transaction beneficial ownership remains at 25,085 Class A shares, representing continued alignment with shareholder interests. Disclosure is complete for the reported transactions.

Compensation Analyst

TL;DR: Share surrenders reflect standard withholding on vested restricted stock rather than discretionary sales.

The details show two consecutive withholding events tied to restricted stock vesting on 09/15/2025 and 09/16/2025. Prices per share used for withholding were $258.83 and $259.83 respectively. The net effect increases directly held shares from 23,596 to 25,085 across the reported dates, after acquisitions and surrenders, consistent with issuance and tax-settlement mechanics under typical executive compensation arrangements.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Tobin Jack J

(Last) (First) (Middle)

20 S. WACKER DRIVE

(Street)

CHICAGO IL 60606

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CME GROUP INC. [ CME ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	MD Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock Class A	09/15/2025		F		143(1)	D	$258.83	23,596	D
Common Stock Class A	09/15/2025		A		1,546	A	$258.83	25,142	D
Common Stock Class A	09/16/2025		F		57(2)	D	$259.83	25,085	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Mr. Tobin surrendered shares to the Company in order to fulfill tax withholding obligations upon the vesting of restricted stock on September 15, 2025.

2. Mr. Tobin surrendered shares to the Company in order to fulfill tax withholding obligations upon the vesting of restricted stock on September 16, 2025.

Remarks:

	By: Margaret Austin Wright for Jack J. Tobin	09/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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