CME GROUP INC.

1. Amend Article Four, Division B, Subdivision 1, Section 4 as follows:

SECTION 4. VOTING RIGHTS.

Subject to the rights of holders of Class B Common Stock set forth in this Division B at every meeting of the shareholders of the corporation in connection with the election of Equity Directors (as defined below)directors and all other matters submitted to a vote of shareholders, every holder of Common Stock shall be entitled to one vote in person or by proxy for each share of Common Stock registered in his or her name on the transfer books of the corporation. Except as otherwise required by law or by this Division B, the holders of each class of Common Stock shall vote together as a single class, subject to any right that may be conferred upon holders of Preferred Stock to vote together with holders of Common Stock on all matters submitted to a vote of shareholders of the corporation.

2. Amend Article Four, Division B, Subdivision 2, Section 1(a) as follows:

(a)ELECTION OF CLASS B DIRECTORS. Subject to and in accordance with Article Five, holders of shares of Class B-1 Common Stock shall have the sole right to elect three directors to the corporation’s board of directors (the“Class B-1 Directors”), and each holder of Class B-1 Common Stock shall have one vote per share in any such election. Holders of shares of Class B-2 Common Stock shall have the sole right to elect two directors to the corporation’s board of directors (the “Class B-2 Directors”), and each holder of Class B-2 Common Stock shall have one vote per share in any such election. Holders of shares of Class B-3 Common Stock shall have the sole right to elect one director to the corporation’s board of directors(the “Class B-3 Director” and together with the Class B-1 Directors and Class B-2 Directors, the “Class B Directors”), and each holder of Class B-3 Common Stock shall have one vote per share in any such election.

3. Amend Article Four, Division B, Subdivision 2, Section 1(c) as follows:

(c)LIMITATION ON VOTING RIGHTS. Notwithstanding anything to the contrary contained in this Section 1 of this Subdivision 2, for so long as any Person or group of Persons acting in concert beneficially own (as defined below) 15% or more of the outstanding shares of any class of Class B Common Stock, then in anyelection of directors elected by that class or other exercise of voting rights with respect to Core Rights or with respect to the election or removal of directors elected by that class, such Person or group shall only be entitled to vote (or otherwise exercise voting rights with respect to) a number of shares of that class of Class B Common Stock that constitutes a percentage of the total number of shares of that class of Class B Common Stock then outstanding which is less than or equal to such Person or group’s "Entitled Voting Percentage" (as defined below). For the purposes hereof, a Person or group’s “Entitled Voting Percentage” at any time shall mean the percentage of the then outstanding shares of Class A Common Stock in the aggregate, beneficially owned by such Person or group at such time. For purposes of this Paragraph (c), a “beneficial owner” of Common Stock includes any Person or group of Persons who, directly or indirectly, including through any contract, arrangement, understanding, relationship or otherwise, written or oral, formal or informal, control the voting power (which includes the power to vote or to direct the voting) of such Common Stock.

4. Amend Article 5, Section (A) as follows:

(A) Subject to Article Four, Division B, Subdivision 2, Section 1(a) of this Certificate of Incorporation, t The number of directors that shall constitute the whole board of directors of the corporation shall be fixed exclusively by one or more resolutions adopted by the board of directors of the corporation, which number shall be no more than 30. As of the time of acceptance by the Delaware Secretary of State of the filing of this Fourth Amended and Restated Certificate of Incorporation (the “Effective Time”), the board of directors of the corporation shall consist of 30 members, including 24 directors that are not Class B Directors (the “Equity Directors”), three Class B-1 Directors, two Class B-2 Directors and one Class B-3 Director.