Billionaire hedge fund manager Bill Ackman announced plans to build a modern-day Berkshire Hathaway (BRK.A 1.42%) (BRK.B 1.38%). Although Ackman and his investors would own most o

Ackman has unveiled his vision to form a new business out of Howard Hughes Holdings “that would acquire controlling interests in operating companies.”

Born into a wealthy New York family, Bill Ackman has amassed a fortune estimated at more than $9 billion, according to Forbes. As he tries to buy The Woodlands-based Howard Hughes Holdings, here's what you should know about the creator of Pershing Square Capital Management.