[Form 4] CME GROUP INC. Insider Trading Activity

Rhea-AI Filing Summary

Jonathan L. Marcus, Senior Managing Director and General Counsel at CME Group Inc. (CME), reported a sale of 392 shares of Class A common stock on 09/18/2025 at a reported price of $262 per share. The filing shows the transaction was executed under a Rule 10b5-1 trading plan adopted on February 18, 2025. After this sale the reporting person beneficially owns 7,851 shares of Class A common stock. The Form 4 is singularly filed for one reporting person and was signed by Margaret Austin Wright on behalf of Jonathan L. Marcus.

Insights

Financial Analyst

TL;DR: Insider sale of 392 shares under a 10b5-1 plan is routine and appears pre-arranged, showing no new material signal.

The sale of 392 shares at $262 under a pre-established Rule 10b5-1 plan indicates a scheduled disposition rather than opportunistic trading. The size relative to the reported post-sale holding of 7,851 shares is modest, suggesting limited impact on aggregate ownership or company valuation. No derivative positions or additional transactions are disclosed in this filing, and the transaction date and plan adoption date are explicitly stated.

Corporate Governance Expert

TL;DR: Disclosure is complete for the reported transaction and properly cites a 10b5-1 plan; filing appears compliant with Section 16 requirements.

The Form 4 identifies the reporting person, officer title, transaction details, and the 10b5-1 plan adoption date, meeting standard disclosure expectations. The form is filed by a single reporting person and includes a signature executed by an authorized representative. There are no indications of amendments or additional beneficial ownership arrangements disclosed here.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Marcus Jonathan L

(Last) (First) (Middle)

20 SOUTH 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)
	Sr MD General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

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	09/18/2025		S		392(1)	D	$262	7,851	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. This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on February 18, 2025

Remarks:

	By: Margaret Austin Wright For: Jonathan L. Marcus	09/18/2025
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did CME insider Jonathan L. Marcus report on Form 4?

The Form 4 reports a sale of 392 shares of CME Group Class A common stock on 09/18/2025 at a reported price of $262 per share.

Was the insider sale under a prearranged trading plan for CME (CME)?

Yes. The filing states the transaction was effected pursuant to a Rule 10b5-1 plan adopted on February 18, 2025.

How many CME shares does Jonathan L. Marcus own after the reported transaction?

Following the sale, the reporting person beneficially owns 7,851 shares of Class A common stock.

What is the reporting person’s role at CME according to the Form 4?

The filing lists Jonathan L. Marcus as a Director and an Officer with the title Sr MD General Counsel.

Was this Form 4 filed by more than one reporting person?

No. The form indicates it was filed by one reporting person.