A company can blame its poor financial performance on a slowing economy, world politics -- even the weather. But an investor with a large economic position in the company can hold the company accountable by turning to shareholder activism as a way to increase shareholder value.Despite the worst bear market since the 1930s, activist investors such as Warren Buffett , Bill Ackman of Pershing Square Capital Management and Carl Icahn are still finding attractive valuations on both the long and short sides of the equity market. At Stockpickr, we follow the latest activist situations for investors interested in piggybacking of these activist investors. To read more, visit Stockpickr.com. Who's on Stockpickr Answers? Jud Pyle will be on Stockpickr Answers on March 11 to respond to investing and trading questions posed by members of the Stockpickr community. Not a member? Join the Stockpickr community today -- free.