ARLINGTON, Va.--(BUSINESS WIRE)--Total assets managed by the top 100 alternative investment managers globally reached $3.5 trillion in 2014 (up from $3.3 trillion in 2013), according to research produced by global professional services company Towers Watson (NASDAQ: TW). The Global Alternatives Survey, which covers nine asset classes and seven investor types, shows that of the top 100 alternative investment managers, real estate managers have the largest share of assets (33% and over $1 trillio