Trust for CME Group (CME) director sells 1,000 shares at $320

Rhea-AI Filing Summary

CME Group Inc. director Elizabeth A. Cook reported an indirect open-market sale of 1,000 shares of Class A common stock held by a trust on March 6, 2026, at $320 per share. After this transaction, the trust’s indirect holdings totaled 17,771 CME Group shares.

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cook Elizabeth A

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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	03/06/2026		S		1,000	D	$320	17,771	I	by Trust

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:

Remarks:

	By: Margaret Austin Wright For: Elizabeth A. Cook	03/09/2026
	** 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 insider transaction did CME (CME) report for Elizabeth A. Cook?

CME Group director Elizabeth A. Cook reported an indirect open-market sale of 1,000 shares of Class A common stock at $320 per share on March 6, 2026, through a trust that holds her indirect ownership.

How many CME (CME) shares were sold and at what price?

The reported transaction involved the sale of 1,000 CME Group Class A shares at a price of $320 per share. This was an open-market sale categorized as a non-derivative transaction under code “S.”

Does Elizabeth A. Cook hold CME (CME) shares after this sale?

Yes. After the reported sale, the trust associated with director Elizabeth A. Cook held 17,771 CME Group Class A shares indirectly. The filing shows these shares as indirect ownership with the nature of ownership listed as “by Trust.”

Was the CME (CME) insider transaction direct or indirect ownership?

The transaction involved indirect ownership. The 1,000 CME Group shares were sold from holdings described as “by Trust”, and the ownership type is coded as indirect, meaning the trust, rather than the individual directly, holds the shares.

What does transaction code “S” mean in this CME (CME) Form 4?

Transaction code “S” in this Form 4 indicates a sale in an open market or private transaction. In this case, it reflects the trust’s open-market sale of 1,000 CME Group Class A common shares at $320 per share.

How many total CME (CME) shares were sold in this Form 4 filing?

The Form 4 reports a single sale of 1,000 shares of CME Group Class A common stock. The transaction summary shows one sell transaction, totaling 1,000 shares, with no reported buy or acquisition transactions in this filing.