    <SEC-DOCUMENT>0001156375-24-000061-index.html : 20240321
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    <ACCEPTANCE-DATETIME>20240321160633
    ACCESSION NUMBER:		0001156375-24-000061
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		14
    FILED AS OF DATE:		20240321
    DATE AS OF CHANGE:		20240321

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CME GROUP INC.
    		CENTRAL INDEX KEY:			0001156375
    		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY & COMMODITY BROKERS, DEALERS, EXCHANGES & SERVICES [6200]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				364459170
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31553
    		FILM NUMBER:		24771338

    	BUSINESS ADDRESS:
    		STREET 1:		20 S. WACKER DR.
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606
    		BUSINESS PHONE:		3129301000

    	MAIL ADDRESS:
    		STREET 1:		20 S. WACKER DR.
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CHICAGO MERCANTILE EXCHANGE HOLDINGS INC
    		DATE OF NAME CHANGE:	20010802
    </SEC-HEADER>
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    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>a2024classbcampaignletters.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a2024classbcampaignletters.htm

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    <FILENAME>classbletterscombined_20001.jpg
    <TEXT>
    Document 2 - file: classbletterscombined_20001.jpg

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    <SEQUENCE>3
    <FILENAME>classbletterscombined_20002.jpg
    <TEXT>
    Document 3 - file: classbletterscombined_20002.jpg

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    <SEQUENCE>4
    <FILENAME>classbletterscombined_20003.jpg
    <TEXT>
    Document 4 - file: classbletterscombined_20003.jpg

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    <SEQUENCE>5
    <FILENAME>classbletterscombined_20004.jpg
    <TEXT>
    Document 5 - file: classbletterscombined_20004.jpg

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    <FILENAME>classbletterscombined_20005.jpg
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    Document 6 - file: classbletterscombined_20005.jpg

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    <FILENAME>classbletterscombined_20006.jpg
    <TEXT>
    Document 7 - file: classbletterscombined_20006.jpg

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    <SEQUENCE>8
    <FILENAME>classbletterscombined_20007.jpg
    <TEXT>
    Document 8 - file: classbletterscombined_20007.jpg

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    <SEQUENCE>9
    <FILENAME>classbletterscombined_20008.jpg
    <TEXT>
    Document 9 - file: classbletterscombined_20008.jpg

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    <SEQUENCE>10
    <FILENAME>classbletterscombined_20009.jpg
    <TEXT>
    Document 10 - file: classbletterscombined_20009.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>classbletterscombined_20010.jpg
    <TEXT>
    Document 11 - file: classbletterscombined_20010.jpg

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    <SEQUENCE>12
    <FILENAME>classbletterscombined_20011.jpg
    <TEXT>
    Document 12 - file: classbletterscombined_20011.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>classbletterscombined_20012.jpg
    <TEXT>
    Document 13 - file: classbletterscombined_20012.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>coverpageforadef14a001.jpg
    <TEXT>
    Document 14 - file: coverpageforadef14a001.jpg

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