Anyone aware of a hedge fund (filed with SEC) trading BTC for profit? It seems that the handful of existing funds are acting as price exposure for investors.
Anyone aware of any BTC liquidity providers?
Not sure if this is a useful answer to you, but it seems to me that the mysterious exchange hitbtc.com has a liquidity provider on board. Could be hitbtc itself or some external business.
cavirtex in canada has also publicly stated they have a liquidity provider.