RIM shares rose yesterday on speculation that famed investor Carl Icahn had taken a stake in the company. Icahn is famous for buying into companies and then making a ton of money when that company is acquired. He famously tried to get a deal done with Microsoft and Yahoo after he bought into Yahoo. He is reportedly about to cash in an 11.4 percent stake in Motorola Mobility Holdings Inc., apparently worth more than $1.3 billion, after Google announced its intention to acquire the company.

With news of Icahn's stake in RIM the stock priced surged. The market is likely hoping the company will be acquired.