UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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FORM 8-K

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CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported) September 11, 2025 (September 9, 2025)

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CME GROUP INC.

(Exact Name of Registrant as Specified in its Charter)

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Delaware

001-31553

36-4459170

(State or Other Jurisdiction
of Incorporation)

(Commission
File No.)

(IRS Employer
Identification No.)

20 South Wacker Drive

Chicago

Illinois

60606

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code: (312) 930-1000

N/A

(Former Name or Former Address, if Changed Since Last Report)

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading symbol	Name of each exchange on which registered
Class A Common Stock	CME	Nasdaq

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405) of this chapter or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐


Item 5.02			Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On September 9, 2025, Jack Tobin, the Managing Director and Chief Accounting Officer of CME Group Inc. (the Company) notified the Company of his decision to retire from the Company. Mr. Tobin will remain in his role as Chief Accounting Officer until October 30, 2026. Mr. Tobin has served in the Chief Accounting Officer role since 2015 and has been with the Company for more than 23 years. His retirement is voluntary and not due to any disagreements regarding the Company's accounting, operations, policies or practices. The Company will initiate a search of potential candidates for the role and Mr. Tobin will work with his successor to support a smooth transition of responsibilities.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

CME Group Inc.

Registrant

Date: September 11, 2025

By:

/s/ Lynne Fitzpatrick

Name:

Title:

Lynne Fitzpatrick

Senior Managing Director, President and Chief Financial Officer

Principal Financial Offer and
Duly Authorized Officer

CME GROUP INC. 8-K