Pershing Square's William Ackman is well known on Wall Street for being an agitator for change. His controversial views on bond insurers made him billions on the short-side while a recent well-timed bet on Longs Drug Stores (NYSE: LDG) netting him several hundred million in mere weeks. Earlier this week, Pershing Square reported its most recent holdings in a Schedule 13F-HR filing with the SEC, which details each of its holdings.

Ackman's largest purchase was in Dr Pepper Snapple Group (NYSE: DPS) in which he acquired over 21 million shares at an average price of $24.70 per share. The activist investor also nearly doubled his stake in the troubled Wendy's (NYSE: WEN) restaurant chain at an average price of $27.10 per share. And finally, many investors are now well aware of Ackman's well-timed purchase of Longs Drug Stores at an average price of $43.50 just weeks before its acquisition by CVS was announced.

Ackman also reduced his holdings in Cadbury Plc and Target Corporation (NYSE: TGT), but still holds a total of nine stocks with a total value of $2.4 billion through his Pershing Square Capital Management hedge fund and has returned over 30% annually. The hedge fund currently holds, among other things, Barnes and Noble, Sears Holdings Corp, Borders Group, and a short position in MBIA Inc. Investors looking to piggy-back on this legendary investor may want to consider purchasing some of his recent holdings like Wendy's or Dr Pepper.