TMX Group Limited is a Canadian financial services company that operates equities, fixed income, derivatives, and energy markets exchanges.

TMX Group is headquartered in Toronto and operates offices across Canada (Montreal, Calgary and Vancouver), in key U.S. markets (New York City, Houston, Boston and Chicago), and overseas (London, Beijing, Singapore and Sydney).

Xavier Rolet, CEO of the LSE Group, will head the company, while TMX Chief Executive Thomas Kloet will become president.

[9] On July 11, 2012, Maple Group's deal was approved by all federal and provincial regulatory authorities, including the Ontario Securities Commission[10] and the Autorité des marchés financiers.

[13] On July 25, 2013, the S&P Dow Jones Indices and TMX Group announced the launch of the S&P/TSX High Income Energy Index.

[15] On March 25, 2014, TMX Group announced plans to launch a business to facilitate capital raising and the trading of securities in the exempt market.

AgriClear, an online platform designed to provide U.S. and Canadian cattle buyers and sellers with an efficient, cost-effective transaction and payment service.

In November 2022, it was announced TMX Group had acquired the Boston-based provider of global market-moving action and corporate event data, Wall Street Horizon.

[23] On March 17, 2014, TMX Group announced that chief executive Thomas Kloet would retire from the company effective August 31, 2014.

[25] On September 29, 2014, TMX Group announced that it had selected Lou Eccleston to lead the organization as its CEO effective November 3, 2014.

[27] On July 16, 2015, TMX Group announced that it had named Nicholas Thadaney, president & CEO, Global Equity Capital Markets effective September 1, 2015.