Based in the EY Tower in Toronto's Financial District, the TSX is a wholly owned subsidiary of the TMX Group for the trading of senior equities.

[4] The TSE grew continuously in size and in shares traded, save for a three-month period in 1914 when the exchange was shut down for fear of financial panic due to World War I.

[6]: 7 Meanwhile, a British Columbia gold rush in the 1890s stimulated the demand for start-up capital but Montreal and Toronto's exchanges deemed the ventures too risky.

While a durable surge in mining trading was recorded in Toronto (either securities) or other publicly listed assets, in Montreal the volume of the equity-centric market was going down.

Toronto found itself a reputation as a financial centre for mining and from 1934, the total trading volume on the TSE surpassed that of Montreal's.

On December 17, 2008, for the first time in TSX history, the exchange was closed for an entire trading day due to a technical glitch.

Xavier Rolet, who is CEO of the LSE Group, would have headed the new enlarged company, while TMX Chief Executive Thomas Kloet would become the new firm president.

The rejection came amidst new concerns raised by Bank of Canada governor Mark Carney regarding foreign control of clearing systems and opposition to the deal by Ontario's finance minister.

[citation needed] The bid was for up to CAD$3.7 billion in cash and shares, in the hope of preventing a takeover of TMX by the LSEG Group.

[citation needed] The new exchange aimed to focus on fairness, particularly in relation to what it referred to as "predatory high-frequency trading practices".

As of January 2024,[update] the Toronto Stock Exchange had 1,811 listed issuers (including ETFs and other structured financial products) with a combined market capitalization of CAD $4.16 trillion.