Mr. David Arnold reports

TMX GROUP LIMITED INCREASES DIVIDEND TO $0.18 PER COMMON SHARE

The board of directors of TMX Group Ltd. has declared a poststock split dividend of 18 cents on each common share (1) outstanding, an increase of 0.6 cent or 3 per cent from the previous 17.4 cents (2). This dividend is payable on Aug. 25, 2023, to shareholders of record at the close of business on Aug. 11, 2023.

"Following our recent five-for-one stock split, we are pleased to announce TMX Group's third dividend increase in 18 months," said David Arnold, chief financial officer of TMX Group. "TMX's track record of dividend growth reflects the ability of our deep and diverse business model to generate cash flows in challenging market conditions. We remain focused on executing our long-term global growth strategy to deliver increased value to our shareholders and to all of our clients and stakeholders across the capital markets ecosystem."

TMX Group hereby advises that this dividend is designated as an eligible dividend for Canadian income tax purposes.

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 Toronto Stock Exchange, TSX Venture Exchange, TSX Alpha Exchange, The Canadian Depository for Securities, Montreal Exchange, Canadian Derivatives Clearing Corp. and Trayport, 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.

(1) TMX Group completed a five-for-one stock split of TMX Group common shares, effective at the close of business on June 13, 2023. All per-common-share amounts in this news release reflect the stock split.

(2) Previous dividend of 87 cents adjusted for the five-for-one stock split to 17.4 cents.