Nike's turnaround strategy can propel the stock by 32% to $97 says this analyst as Bill Ackman loads up on the shares.

Ackman's activist investor strategy requires a highly concentrated portfolio. He needs to buy enough of a company to have some say, and his attention and influence can only be spread so thin.

Under the proposed deal, a Pershing Square unit will buy 11.8 million shares for $1 billion from non-Pershing Square ...

The billionaire activist investor has made some big moves in his portfolio recently. Bill Ackman likes to focus on just a few companies at a time. His hedge fund, Pershing Square Capital ...