There is one called Richfund (
www.richfund.pe). It is the largest bitcoin hedge fund in China and they are well respected in bitcoin community. They do market-making for exchanges in Europe and, of course, China, automated arbitrage on even more exchanges, and OTC trading. Their combined average daily bitcoin volume is between 5k - 6k. In fact, I'm a trader, among many others, for them in Europe and their network of traders working for them is quite expansive worldwide.