TMX Group Limited — Proxy Solicitation & Information Statement 2022

Apr 4, 2022

TSX TRUST COMPANY

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VIA ELECTRONIC TRANSMISSION

April 4, 2022

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: TMX GROUP LIMITED

We are pleased to confirm that copies of the following proxy-related materials were mailed on April 1, 2022 to the Registered Securityholders and to the Non-Objecting Beneficial Owners ("NOBO") and to the ESPP Holders:

1 Proxy with Notice-and-Access Notice and Request for Financial Statements - Registered Securityholders - English

• 2 Formulaire de procuration avec notification et accès et demande d’états financiers - Registered Securityholders - French

• 3 Voting Instruction Form with Notice-and-Access Notice and Request for Financial Statements - NOBOs and ESPP Holders - English

• 4 Formulaire d'instructions de vote avec notification et accès et demande d'états financiers - NOBOs and ESPP Holders- French

• 5 Notice of Meeting Combined with Information Circular

• Registered Securityholders and NOBOs Requesting a Full Package - English

• 6 Avis de convocation et circulaire d'information de la direction -

• Registered Securityholders and NOBOs Requesting Full Package - French

• 7 Virtual Meeting Guide Form - Registered Securityholders and NOBOs - English

• 8 Guide de Participation à L’assemblée Virtuelle - Registered Securityholders and NOBOs - French

• 9 Proxy Return Envelope

Yours truly,

TSX Trust Company

''Steven Nguyen''

Senior Manager Steven.Nguyen@tmx.com

VANCOUVER 650 West Georgia Street, Suite 2700 Vancouver, BC V6B 4N9 T 604 689-3334

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MONTRÉAL 1800 - 1190, avenue des Canadiens-de-Montréal, C. P. 37 Montréal (Québec) H3B 0G7 T 514 395-5964