FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Sammann Derek 		2. Issuer Name and Ticker or Trading Symbol

CME GROUP INC. [ CME ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Sr MD Gl Hd Commodity & Option
(Last)          (First)          (Middle)

20 S. WACKER DRIVE 		3. Date of Earliest Transaction (MM/DD/YYYY)

6/12/2019
(Street)

CHICAGO, IL 60606
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   5/14/2019     J   V 6411   (1) D $0.0   15869   D    
Common Stock Class A   5/15/2019     G   V 495   (2) D $0.0   15374   D    
Common Stock Class A   5/15/2019     G   V 4217   (3) D $0.0   11157   D    
Common Stock Class A   6/12/2019     S    6400   D $198.83   (4) 4757   D    
Common Stock Class A   5/15/2019     G   V 495   A $0.0   2253   I   by Children   (2)
Common Stock Class A   5/15/2019     G   V 4217   A $0.0   16757   I   by Spouse   (3)
Common Stock Class A   5/31/2019     G   V 1000   D $0.0   15757   I   by Spouse   (5)
Common Stock Class A   5/14/2019     J   V 6411   A $0.0   17135   I   by Trust   (1)
Common Stock Class A   5/31/2019     G   V 388   D $0.0   16747   I   by Trust   (6)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 of Derivative Security: 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)  Ownership has been updated to reflect the transfer of CME Group Class A common stock to reporting person's revocable living trust.
(2)  This transaction represented a gift of securities from the reporting person to his children, who share the reporting person's household. The reporting person disclaims beneficial ownership of the shares held by his children, and this report shall not be deemed as an admission that the reporting person is the beneficial owner of his children's shares for purposes of Section 16 or for any other purpose.
(3)  This transaction represented a gift of securities from the reporting person to his spouse. The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report shall not be deemed as an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.
(4)  On June 12, 2019, Mr. Sammann sold an aggregate of 6,400 shares of CME Group Class A common stock. For reporting purposes, the sale prices within a $1 range have been aggregated and the weighted average has been reported. The price ranges were $198.60 to $198.99 and $199.02 to $199.06. The Company maintains a record of the transactions and copies will be provided upon request.
(5)  Ownership has been updated to reflect the transfer of 1,000 shares of common stock from the reporting person's spouse's revocable living trust into a charitable donor advised fund.
(6)  Ownership has been updated to reflect the transfer of 388 shares of common stock from the reporting person's trust into a charitable donor advised fund.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Sammann Derek
20 S. WACKER DRIVE
CHICAGO, IL 60606

Sr MD Gl Hd Commodity & Option

Signatures
By: Margaret Austin Wright For: Derek Louis Sammann 6/13/2019
** 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 control number.
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