I'm also surprised they don't own CTC.ca given all the domains they own/bought. The acronym is plastered hundreds of times in all of their financial reports, and it's their ticker too.
On a somewhat related matter, I noticed how they own (and currently use) CTFS.com, as well as MYCTFS.com, for their financial services / banking subsidiary. Interestingly enough, they use the .COM over the .CA... which is a little surprising given they use their .CAs as their primary domain for their other websites. They previously used CTAL.com before switching over to CTFS.com, and I don't think they ever owned CTAL.ca since it's been in use by different companies since 2001.
If you have further questions, just call: 1-866-681-CTFS
Just kidding, but it's their actual phone number so feel free to call if you want. Or you can learn more at this wikipedia page: