Ken Griffin, the ambitious chief executive founder of Citadel Investments, one of the world’s largest and most prominent hedge fund firms, makes no secret of the fact that he wants to turn the company he started from his Harvard dorm room into something resembling Goldman Sachs.

Besides trading for itself, Citadel has a stock loan department and is among the largest options marketmakers in the world. It has two reinsurance companies and will soon begin providing administration services to other hedge funds, a significant development for the Chicago-based firm.