TMX Group Limited — Proxy Solicitation & Information Statement 2026

Apr 2, 2026

Notice of our 2026 annual and special meeting

Tuesday, May 5, 2026

2:00 p.m. (Eastern time)

TMX Market Centre

120 Adelaide Street West

Toronto, Ontario, Canada

And by virtual meeting via live webcast online at https://virtual-meetings.tsxtrust.com/en/1882

What the meeting will cover

receiving our financial statements

appointing our auditor

electing our directors

voting on our approach to executive compensation

voting on our omnibus equity incentive plan

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 10, 2026. 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.

Shareholders attending online will have an equal opportunity to participate at the meeting. Registered shareholders and duly appointed proxy holders attending the meeting virtually, via live webcast, can ask questions and vote, all in real time, as long as you are connected to the internet and have logged into https://virtual-meetings.tsxtrust.com/en/1882. 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 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 Friday, May 1, 2026.

By order of the board,

Cheryl Graden

Chief Legal and Enterprise

Corporate Affairs Officer and Corporate Secretary

Toronto, Ontario

March 20, 2026

Where to get a copy of the 2026 management information circular

If 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 docs.tsxtrust.com/2009, on SEDAR+ (sedarplus.ca), or at tmx.com.

If you prefer to have a paper copy, contact us by April 24, 2026, 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

300-100 Adelaide Street West

Toronto, Ontario M5H 1S3

FAX

(416) 947-4727

TSX Trust Company

100 Adelaide Street West,

Suite 301 Toronto, Ontario

M5H 4H1

Fax (416) 595-9593