[Form 4] CME GROUP INC. Insider Trading Activity

Rhea-AI Filing Summary

Form 4 disclosure for Derek Sammann, Senior Managing Director, Global Head of Commodities Markets at CME Group (CME). The filing reports share surrender and vesting activity on September 15-16, 2025. Mr. Sammann surrendered 1,099 and 379 Class A shares to satisfy tax withholding obligations upon restricted stock vesting on those dates. The filing lists direct beneficial ownership amounts of 8,318; 11,362; and 10,983 Class A shares after respective transactions, and shows indirect holdings of 14,614 shares held by a trust and 8,336 shares held by his spouse. The form was signed on 09/17/2025.

Insights

Financial Analyst

TL;DR: Routine insider withholding transactions reduced direct shares; indirect holdings remain material but unchanged by this filing.

The filing documents standard tax-withholding share surrenders tied to the vesting of restricted stock on 09/15/2025 and 09/16/2025. Specifically, Mr. Sammann surrendered 1,099 and 379 Class A shares respectively. Such transactions are non-cash, administrative actions that do not reflect purchases or sales for cash proceeds and typically have negligible market impact. The filing also discloses indirect holdings of 14,614 shares via a trust and 8,336 shares held by his spouse, which are relevant to total family exposure but are not newly transacted here.

Corporate Governance Expert

TL;DR: Disclosure is compliant and routine; surrender for tax withholding is common post-vesting and poses no governance concerns.

The Form 4 indicates compliance with Section 16 reporting following restricted stock vesting. The reported surrenders (1,099 and 379 shares) were executed to cover tax obligations and were reported as dispositions. The filing is signed by an authorized representative and includes explanatory remarks. There are no indications of unusual timing, related-party transactions, or changes in officer role from this document alone.

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^*

Sammann Derek

(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)
	Sr MD Gl Hd Commodities Mkts

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		1,099(1)	D	$258.83	8,318	D
Common Stock Class A	09/15/2025		A		3,044	A	$258.83	11,362	D
Common Stock Class A	09/16/2025		F		379(2)	D	$259.83	10,983	D
Common Stock Class A								14,614	I	by Trust
Common Stock Class A								8,336	I	by Spouse

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

2. Mr. Sammann 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: Derek Louis Sammann	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).
** 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 transactions did Derek Sammann report on Form 4 for CME (CME)?

The filing reports share surrenders to cover tax withholding: 1,099 Class A shares on 09/15/2025 and 379 Class A shares on 09/16/2025.

Why were shares surrendered according to the Form 4?

The explanatory notes state the shares were surrendered to the company to fulfill tax withholding obligations upon the vesting of restricted stock.

How many shares does the Form 4 show as indirectly owned by Derek Sammann?

The filing lists 14,614 Class A shares indirectly owned by a trust and 8,336 Class A shares indirectly owned by his spouse.

Did Derek Sammann sell shares for cash proceeds in this filing?

No. The reported dispositions were share surrenders to satisfy tax withholding related to restricted stock vesting, not cash sales.

When was the Form 4 signed and filed?

The Form 4 was signed on 09/17/2025 by Margaret Austin Wright on behalf of Derek Louis Sammann.