Vanguard (NYSE: CME) reports 36.25M shares, cites 01/12/2026 realignment

Rhea-AI Filing Summary

CME Group Inc: The Vanguard Group filed Amendment No. 9 to a Schedule 13G/A reporting 36,248,559 shares beneficially owned, representing 10.10% of common stock. The filing states shared voting power 3,697,661 and shared dispositive power 36,248,559. It notes an internal realignment effective 01/12/2026 that changed portfolio management and proxy voting roles within The Vanguard Group, Inc.

Insights

Institutional Ownership Analyst

Vanguard reports a 10.10% stake with shared control; holdings remain substantial.

The filing lists 36,248,559 shares beneficially owned and 10.10% of the class, with shared voting power 3,697,661. This indicates significant economic exposure while voting influence is distributed among Vanguard entities.

Investor attention should focus on future amendments from Vanguard subsidiaries after the 01/12/2026 realignment; subsequent filings may disclose narrower, disaggregated ownership by those subsidiaries.

Securities Compliance Counsel

Amendment cites internal reorganization and reliance on SEC release for disaggregation.

The statement references SEC Release No. 34-39538 and says Vanguard anticipates reporting by subsidiaries on a disaggregated basis following the 01/12/2026 realignment. The filing is signed by the Head of Global Fund Administration on 03/05/2026.

Compliance observers should watch for further Schedule 13G/A or 13D filings from Vanguard affiliates that reflect redistributed voting or dispositive powers.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 9)

CME Group Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

02/27/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP Number(s):

1

Names of Reporting Persons

The Vanguard Group

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,697,661.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 36,248,559.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

36,248,559.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

10.10 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: On January 12, 2026, The Vanguard Group, Inc. went through an internal realignment. As of that date, The Vanguard Group, Inc. no longer performs portfolio management services or administers proxy voting. In accordance with SEC Release No. 34-39538 (January 12, 1998), The Vanguard Group, Inc. anticipates that certain subsidiaries or business divisions of subsidiaries of The Vanguard Group, Inc., that currently have, or are deemed to have, beneficial ownership with The Vanguard Group, Inc., will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on such release. These subsidiaries and/or business divisions pursue the same investment strategies as previously pursued by The Vanguard Group, Inc. prior to the realignment.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CME Group Inc
(b)	Address of issuer's principal executive offices: 20 South Wacker Drive, Chicago, IL, 60606
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd., Malvern, PA 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 12572Q105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 36248559
(b)	Percent of class: 10.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 3697661
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 36248559
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Vanguard Group, Inc.'s clients, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein. No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	03/05/2026

FAQ

How many CME (CME) shares does The Vanguard Group report owning?

The Vanguard Group reports beneficial ownership of 36,248,559 shares. The filing states this equals 10.10% of CME's common stock and lists shared voting power of 3,697,661.

What voting and dispositive powers does Vanguard report for CME stock?

Vanguard reports 0 sole voting and dispositive power, 3,697,661 shared voting power, and 36,248,559 shared dispositive power. These figures are listed in Item 4 of the amendment.

When did Vanguard's internal realignment referenced in the filing occur?

The filing states the internal realignment became effective on 01/12/2026. It explains portfolio management and proxy voting roles changed within The Vanguard Group, Inc.

Will Vanguard subsidiaries report ownership separately after the realignment?

Yes. The filing states Vanguard anticipates certain subsidiaries or business divisions will report beneficial ownership separately. This is said to be in reliance on SEC Release No. 34-39538.

Who signed the Schedule 13G/A amendment for Vanguard and when?

The filing is signed by Ashley Grim, Head of Global Fund Administration, with the signature dated 03/05/2026. That signature appears at the end of the amendment.