Ms. Catherine Kee reports

TMX GROUP LIMITED ANNOUNCES RELEASE DATE FOR Q3 2025 FINANCIAL RESULTS AND ANALYST CONFERENCE CALL

TMX Group Ltd. will release its financial results for the third quarter (Q3) ended Sept. 30, 2025, in the evening of Monday, Oct. 27, 2025. An analyst conference call to review the results will be held on Tuesday, Oct. 28, 2025, at 8 a.m. ET.

What:  TMX Group Q3 2025 financial results analyst conference call

Who:  John McKenzie, chief executive officer, TMX Group; David Arnold, chief financial officer, TMX Group; Amin Mousavian, vice-president, investor relations, treasury and interim chief risk officer, TMX Group

When:  Tuesday, Oct. 28, 2025, 8 a.m. ET

How:  Participants may access the conference call via a webcast link. Alternatively, participants may join the live call by dialling 1-412-652-1226 or 1-833-752-4317. An audio replay of the conference call will be available at 1-855-669-9658 or 1-412-317-0088, 2770400 followed by the pound key. The audio webcast of the conference call will also be available and archived in TMX's shareholder events section. About TMX Group Ltd.

TMX Group operates global markets, and builds digital communities and analytic solutions that facilitate the financing, growth and success of businesses, traders and investors. TMX Group's key operations include the Toronto Stock Exchange, the TSX Venture Exchange, the TSX Alpha Exchange, the Canadian Depository for Securities, the Montreal Exchange, Canadian Derivatives Clearing Corp., TSX Trust, TMX Trayport, TMX Datalinx, TMX VettaFi and TMX Newsfile, which provide listing markets, trading markets, clearing facilities, depository services, technology solutions, data products and other services to the global financial community. TMX Group is headquartered in Toronto and operates offices across North America (Montreal, Calgary, Vancouver and New York), as well as in key international markets, including London, Singapore and Vienna.