ARE THERE ANY TRADING FIRMS IN SOUTHERN CALIFORNIA?

I know which many of the trade firms have been in New York, though have been there any firms in Southern California? More specifically, I am articulate about firms where we have been lerned to be the trader, as well as we come to work bland with everybody else during your bureau as well as demeanour during the couple of mechanism screens all day. It does not make the difference either the organisation trades currency, bonds, equities, etc. I am only carrying the difficult time anticipating trade firms in Southern California. If there have been any, can we discuss it me who?