    <SEC-DOCUMENT>0001156375-23-000009-index.html : 20230203
    <SEC-HEADER>0001156375-23-000009.hdr.sgml : 20230203
    <ACCEPTANCE-DATETIME>20230203080759
    ACCESSION NUMBER:		0001156375-23-000009
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20230203
    FILED AS OF DATE:		20230203
    DATE AS OF CHANGE:		20230203

    FILER:

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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31553
    		FILM NUMBER:		23583772

    	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>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>a2023letterannouncingclass.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: a2023letterannouncingclass.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>a2023letterannouncingnom001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: a2023letterannouncingnom001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a2023letterannouncingnom002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: a2023letterannouncingnom002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>a2023letterannouncingnom003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: a2023letterannouncingnom003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>coverpageforaddtionalmat001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: coverpageforaddtionalmat001.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>