Ready for the high-risk, high-return hedge fund investments? Here is a list of the top hedge fund investment firms. : Hedge funds are an advanced level portfolio of investments, containing a mix of leveraged derivatives, as well as long and short positions of domestic and international markets, based on advanced methodologies. These funds are intended for sophisticated high-risk, high-return investors. This article looks at the top hedge fund firms, based on total assets under management (AUM), and ranks them in decreasing order.