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.”

Ackman proposed a takeover of real estate developer Howard Hughes for $85 a share and said he is displeased with its recent stock performance.