This supplement to the proxy statement of CME Group Inc., dated March 18, 2020, is being filed with the
Securities and Exchange Commission and is being made available to shareholders on or about April 16, 2020.
IMPORTANT NOTICE
REGARDING
2020 ANNUAL MEETING OF SHAREHOLDERS
TO BE HELD MAY 6, 2020
Dear
Shareholders:
Due to public health concerns regarding the coronavirus (COVID-19) pandemic and governmental
actions related thereto, including restrictions on in-person gatherings, NOTICE IS HEREBY GIVEN that the location of the Annual Meeting of Shareholders of CME Group Inc. (we or our),
has been changed. As previously announced, the Annual Meeting will be held on Wednesday, May 6, 2020 at 10:00 a.m., Central Time. We have determined to hold the Annual Meeting in a virtual meeting format only, with attendance via the Internet,
to protect the health and well-being of our shareholders and our employees, management team and board of directors. You will not be able to attend the Annual Meeting in person.
As described in the previously-distributed proxy materials for the Annual Meeting, which may also be accessed at www.proxyvote.com, you are entitled to
participate in and vote at the Annual Meeting if you were a shareholder of record at the close of business on March 9, 2020, the record date of the Annual Meeting, or hold a legal proxy for the meeting provided by your bank, broker or nominee.
Accessing the Virtual Meeting. The Annual Meeting will be held virtually at www.virtualshareholdermeeting.com/CME2020. In order to attend
the Annual Meeting virtually, you will need to log-in using the control number found on your proxy card, voting instruction form or notice that was previously mailed to you or sent to you electronically.
Online check-in will begin prior to the start of the Annual Meeting. Shareholders of record may vote during the Annual Meeting by following the instructions available on the meeting website. In addition, you
may submit questions and view the rules of conduct for the virtual Annual Meeting at www.virtualshareholdermeeting.com/CME2020. A list of shareholders entitled to vote at the Annual Meeting will be accessible to shareholders of record during
the Annual Meeting on the meeting website. Guests without control numbers will be allowed to participate in the Annual Meeting in a listen only mode.
Technical Assistance. If you encounter any difficulties accessing or hearing the Annual Meeting during the
check-in or meeting time, there will be a helpline number on the meetings website.
In addition, a full
webcast replay will be posted to the Investor Relations section of our website www.cmegroup.com for one year following the Annual Meeting.
Your
vote is very important to us. Whether or not you plan to attend the Annual Meeting virtually, we urge you to vote and submit your proxy in advance of the meeting by one of the methods described in the proxy materials for the Annual Meeting. If you
have already voted, you do not need to vote again. We will not be updating the notice or the proxy card included with the proxy materials to reflect the