CME Group CEO sells 35,000 shares in May

CME Group Inc. Chairman and CEO Terrence A. Duffy reported selling a total of 35,000 shares of Class A common stock in open-market transactions on May 15, 2026.

Rhea-AI Filing Summary

CME Group Inc. Chairman and CEO Terrence A. Duffy reported selling a total of 35,000 shares of Class A common stock in open-market transactions on May 15, 2026. The sales occurred in two blocks: 9,004 shares at a weighted average price of $299.58 per share and 25,996 shares at a weighted average price of $298.14 per share.

According to the footnotes, each reported price is a weighted average for multiple trades, with actual sale prices ranging from $298.00 to $298.89 for one block and $299.00 to $299.95 for the other. The filing indicates these were standard open-market sales of non-derivative common stock.

Insider Trade Summary

Net Seller: 35,000 shares

Net Sell 2 txns

Insider DUFFY TERRENCE A

Role Chairman and CEO

Sold 35,000 shs ($10.45M)

Type	Security	Shares	Price	Value
Sale	Common Stock Class A	25,996	$298.14	$7.75M
Sale	Common Stock Class A	9,004	$299.58	$2.70M

Holdings After Transaction: Common Stock Class A — 55,630 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 $298.00 to $298.89, 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 $299.00 to $299.95, 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

Shares sold block 1: 9,004 shares Weighted avg price block 1: $299.58 per share Shares sold block 2: 25,996 shares +4 more

7 metrics

Shares sold block 1 9,004 shares Open-market sale of Class A common stock on May 15, 2026

Weighted avg price block 1 $299.58 per share Weighted average sale price for 9,004-share block

Shares sold block 2 25,996 shares Open-market sale of Class A common stock on May 15, 2026

Weighted avg price block 2 $298.14 per share Weighted average sale price for 25,996-share block

Total shares sold 35,000 shares Aggregate of both reported open-market sales

Price range block 2 $298.00–$298.89 Actual trade range for 25,996-share sale block

Price range block 1 $299.00–$299.95 Actual trade range for 9,004-share sale block

Key Terms

open-market sale, weighted average price, Common Stock Class A, non-derivative

4 terms

open-market sale financial

"transaction_action":"open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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.

Common Stock Class A financial

"security_title": "Common Stock Class A""

non-derivative financial

"transaction_type": "non-derivative""

FAQ

What insider transaction did CME (CME) report for its CEO?

CME Group reported that Chairman and CEO Terrence A. Duffy sold 35,000 shares of Class A common stock. The transactions took place on May 15, 2026, and were executed as open-market sales according to the Form 4 filing.

How many CME (CME) shares did the CEO sell and at what prices?

Terrence A. Duffy sold 35,000 CME Group Class A shares in two blocks. He sold 9,004 shares at a weighted average price of $299.58 and 25,996 shares at a weighted average price of $298.14 in open-market transactions.

Were the CME (CME) CEO share sales single trades or multiple transactions?

The reported prices are weighted averages for multiple trades. Footnotes state the 25,996-share block traded between $298.00 and $298.89, while the 9,004-share block traded between $299.00 and $299.95, reflecting numerous executions within each price range.

What type of security did the CME (CME) CEO sell?

The CEO sold CME Group’s Class A common stock. Both reported transactions on May 15, 2026, involved non-derivative common shares, executed as open-market sales rather than options exercises or derivative conversions.

Does the CME (CME) Form 4 mention derivative positions for the CEO?

The filing’s derivative summary is empty, indicating no derivative transactions, exercises, or conversions were reported in this Form 4. Only sales of non-derivative Class A common stock are disclosed for May 15, 2026.

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Accepted by SEC EDGAR 05/18/2026 - 04:12 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)
05/15/2026

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	05/15/2026		S		25,996	D	$298.14(1)	64,634	D
Common Stock Class A	05/15/2026		S		9,004	D	$299.58(2)	55,630	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 $298.00 to $298.89, 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 $299.00 to $299.95, 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	05/18/2026
	** 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)