BlackBerry shares are on the rise today as rumors swirl. Carl Icahn has allegedly bought stake in the company. However, we’ve heard a similar rumor before in 2011. This time, Antonio Costa is behind the unconfirmed rumor.

Costa was apart of another unconfirmed rumor regarding BlackBerry, claiming the CEO, Thorsten Heins, will be discussing tablet plans at BlackBerry Live.

Over the Icahn purchase rumor, BlackBerry shares have risen about 2% so far today. Icahn is a renowned business magnate, valued at over $20 Billion. It will certainly be interesting to see if this rumor comes to fruition.