I'm currently looking for an entry level trading position and was wondering if anyone can tell me what other firms are similar to IMC, Optiver, All Options, and Tibra in terms of company structure, business model, product focus, etc.

I'm interested in this type of firm as opposed to pure performance based payout firms which require risk capital and would greatly appreciate if you guys could help me out. Another consideration is geographical location as firms like these tend not to look at candidates without the required work authorization (I'm Canadian/Hong Kong citizen).

Its very hard to find a comprehensive list of proprietary trading firms and gather information about them. I've found a couple lists online but was hoping the members on this forum could provide their insight.

Thank you all in advance.