CME Group CEO sells 15,000 shares on Sept. 10

Rhea-AI Filing Summary

CME GROUP INC. (CME) disclosed that Chairman and CEO Terrence A. Duffy sold a total of 15,000 shares of Class A common stock on September 10, 2026 in open-market or private transactions. The filing states these sales were not made under a Rule 10b5-1 trading plan and reports no post-transaction share balance.

Insider Trade Summary

Net Seller: 15,000 shares

Net Sell 2 txns

Insider DUFFY TERRENCE A

Role Chairman and CEO

Sold 15,000 shs ($4.12M)

Type	Security	Shares	Price	Value
Sale	Common Stock Class A F1	14,372	$274.41	$3.94M
Sale	Common Stock Class A F2	628	$275.03	$173K

Holdings After Transaction: Common Stock Class A — 40,630 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.875 to $274.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.9056 to $275.0804, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Key Figures

Total shares sold: 15,000 shares First sale size: 14,372 shares First sale weighted average price: $274.41 per share +3 more

6 metrics

Total shares sold 15,000 shares Aggregate of reported sales of CME Class A common stock on September 10, 2026

First sale size 14,372 shares Shares sold in first reported transaction on September 10, 2026

First sale weighted average price $274.41 per share Weighted average price; individual trades from $273.875 to $274.85

Second sale size 628 shares Shares sold in second reported transaction on September 10, 2026

Second sale weighted average price $275.03 per share Weighted average price; individual trades from $274.9056 to $275.0804

Rule 10b5-1 plan status No plan affirmed Document-level Rule 10b5-1 checkbox is not selected for these transactions

Key Terms

weighted average price, open market or private transaction, Rule 10b5-1

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open market or private transaction financial

"Sale in open market or private transaction"

Rule 10b5-1 regulatory

"The Rule 10b5-1 checkbox is not selected for these transactions"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider trading activity did CME (CME) report for Terrence A. Duffy?

CME reported that Chairman and CEO Terrence A. Duffy sold 15,000 shares of Class A common stock on September 10, 2026 in open-market or private transactions, as reflected in two sale entries on the Form 4.

At what prices were the CME (CME) shares sold by the CEO?

One block of 14,372 shares had a weighted average price of $274.41, with individual trades from $273.875 to $274.85. The other block of 628 shares had a weighted average price of $275.03, with trades from $274.9056 to $275.0804.

Were the September 10, 2026 CME (CME) insider sales under a Rule 10b5-1 plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not selected, and the footnotes describe pricing details only, so these reported sales are not affirmed as being made under a Rule 10b5-1 trading plan.

How many separate CME (CME) sale transactions did the Form 4 report?

The Form 4 reports two sale transactions in CME Class A common stock for Terrence A. Duffy on September 10, 2026, totaling 15,000 shares sold when combining the reported share amounts.

Does the CME (CME) Form 4 show the CEO’s holdings after these sales?

No. For both reported sales, the Form 4 leaves the field for shares beneficially owned following the transaction blank, so it does not state Terrence A. Duffy’s post-transaction position.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/11/2026 - 05:17 PM Accepted by SEC EDGAR 09/11/2026 - 05:17 PM Learn about SEC filing dates

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^*

DUFFY TERRENCE A

(Last) (First) (Middle)

20 S. WACKER DRIVE

(Street)

CHICAGO ILLINOIS 60606

(City) (State) (Zip)

UNITED STATES

(Country)

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
X	Officer (give title below)		Other (specify below)
	Chairman and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

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

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

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

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	09/10/2026		S		14,372	D	$274.41(1)	41,258	D
Common Stock Class A	09/10/2026		S		628	D	$275.03(2)	40,630	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.875 to $274.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.9056 to $275.0804, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Remarks:

	/s/ Elizabeth Hensen, as Attorney-in-Fact for Terrence A. Duffy	09/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)