Billionaire Bill Ackman is known for making big contrarian bets on Wall Street, including piling into Chipotle Mexican Grill when it was still reeling from the E. coli crisis, and shorting Herbalife ...

Bill Ackman has called on the entire board of Harvard ... Ackman rose to prominence in 2012 with a disastrous $1 billion short of Herbalife, the dietary supplements firm, with rival activist ...

Billionaire Bill Ackman has accumulated a stake in Hertz ... coli crisis, and shorting Herbalife on concerns about its business. Now, Ackman is shaking up Wall Street again, taking a 19.8% stake ...