TMX Group Limited — AGM Information 2021

Apr 9, 2021

Notice of our 2021 annual and s ecial meetin p g

Wednesday, May 12, 2021

What the meeting will cover

2:00 p.m. (Eastern time)

receiving our 2020 financial statements TMX Group appointing our auditor Virtual only meeting via electing our directors live webcast online at voting on our approach to executive compensation http://web.lumiagm.com/281203339 voting on the shareholder proposal considering any other business properly brought before the meeting

Your vote is important

You can vote if you owned TMX Group common shares at the close of business on March 16, 2021. The management information circular tells you about the meeting, what you’re voting on and how to vote. Please read it carefully, and remember to vote.

The meeting will be held in a virtual only format, via live audio webcast. Registered shareholders and duly appointed proxyholders will be permitted to attend the meeting, ask questions and vote, all in real time, provided they are connected to the internet and have logged in at http://web.lumiagm.com/281203339. You have to be connected to the internet at all times to be able to vote – it is your responsibility to make sure you stay connected for the entire meeting. Please see page 2 of the management information circular for details about voting at our virtual meeting.

If you cannot attend the meeting, you can vote by proxy. Simply complete, date and sign the enclosed proxy or voting instruction form and mail or fax it to TSX Trust Company or go to www.voteproxyonline.com and enter your control number by 2:00 p.m. (Eastern time) on Monday, May 10, 2021.

By order of the board,

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Cheryl Graden

Chief Legal and Enterprise Corporate Affairs Officer and Corporate Secretary

Where to get a copy of the 2021 management information circular

If you’re a registered shareholder or you’ve already given us instructions to send you printed documents, your management information circular is attached to this notice.

If you’re a beneficial shareholder, we’re making the circular available online instead of by mail according to a set of rules developed by the Canadian Securities Administrators called notice and access.

You can download the circular at https://docs.tsxtrust.com/2009, on SEDAR (sedar.com), or on our website (tmx.com).

If you prefer to have a paper copy, contact us by April 23, 2021 and we will send you one free of charge:

call toll-free 1 (888) 873-8392 email TMXshareholder@tmx.com write Corporate Secretary TMX Group Limited 100 Adelaide Street West Suite 300 Toronto, Ontario M5H 1S3 fax (416) 947-4727

Toronto, Ontario March 26, 2021

TSX Trust Company

100 Adelaide Street West, Suite 301 Toronto, Ontario M5H 1S3 Fax (416) 595-9593