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 *

Pietrowicz John W.
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 Chief Financial Officer
(Last)          (First)          (Middle)

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

3/15/2020
(Street)

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

3/17/2020 
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 3/15/2020  A  6176 (1)A$0.0 39454 (2)D  

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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) Represents shares earned from a 2016 performance share award based on the company's achievement of net income margin growth relative to the diversified financial services index of the S&P 500 and total shareholder return relative to the S&P 500 measured over 2017-2019.
(2) The original Form 4 filed on 03/15/2020 incorrectly reported the transaction as a disposition. This amendment is being filed to correctly report the transaction as an acquisition and correct filer's beneficial ownership.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Pietrowicz John W.
20 S. WACKER DRIVE
CHICAGO, IL 60606


Sr MD Chief Financial Officer

Signatures
By: Margaret Austin Wright For: John William Pietrowicz6/10/2020
**Signature of Reporting PersonDate

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