Ever since Bill Ackman announced that he was shorting multi-level marketing nutrition company Herbalife, the Street has wondered if his fellow activist investor, David Einhorn had taken a position as well. Now, according to the WSJ, the...

Hedge fund titan Bill Ackman, the founder of Pershing Square Capital Management, just sent out his Q1 letter to investors dated June 12, 2012.   In the letter, the activist investor said they have added new investments,...