The TMX Group is the company that owns and operates the TSX. Their share price can be seen here. They provide the "platform" that allows trading in companies (Copper Fox). They make their money by charging annual fees to the companies that are listed on the TSX.

The new stock exchange (Aequitas) could hurt the business of the TMX Group but the TSX isn't going anywhere. First of all, the Canadian Government probably would not allow the TMX Group to go bankrupt because of it's importance. Second of all, even if it did go bankrupt it would just get bought out and continue running.

If it somehow went bankrupt and disappeared, Copper Fox would just pay to move to the new Aequitas exchange. Us shareholders would not notice a difference. It would be similar to finding out that the company that provided your home insurance went bankrupt. It's no big deal just to get insurance through someone else.