carl icahn

Shares of BlackBerry maker Research in Motion Ltd. surged Tuesday amid speculation that billionaire investor Carl Icahn has taken a stake in the company.

Billionaire investor Carl Icahn said Tuesday he would backstop any auction of Clorox Co.

Forest Laboratories Inc chief Howard Solomon will likely have to cede some control over the drugmaker he has stewarded for over three decades to resolve a showdown with billionaire Carl Icahn .

Midway through his eighth decade, Carl C. Icahn has begun to contemplate his legacy, and the future of the Icahn empire hangs in the balance.

Several bidders are set to duke it out for Blockbuster Inc. at a bankruptcy auction in New York on Monday. They reportedly include Dish Network Corp. and billionaire investor Carl Icahn.

Dish Network and Carl Icahn have joined the bidding for Blockbuster in advance of a bankruptcy court auction next week.

But after years of failing to adapt, will a new investor or management team be able to turn around the beleaguered DVD rental firm?

This report is an intraday check of some of the more notable stocks that have hit a 52-week high or low so far today. 52-Week High:

• Lions Gate Entertainment Corp.
  
  (NYSE: LGF) high of $7.40. Reaching a new high today as activist investor Carl Icahn increased his bid for the company from $6.50 to $7.50 per share.
• Spreadtrum Communications Inc.
  
  (Nasdaq: SPRD) high of $11.61.

Billionaire and activist investor Carl Icahn said Tuesday he will again extend his offer to buy Lions Gate Entertainment Corp., and removed the condition of the offer requiring at least 50.1 percent of shares to be tendered.

Once upon a time, Carl Icahn complained about the way Jerry Yang was running Yahoo and bought a massive number of shares to force him out.  Later, Icahn joined Yahoo's board of directors and gave Carol Bartz his full support.  Now, Icahn's involvement seems almost over, as he's sold around 7.9 million shares.

Lions Gate plans to reject an offer from activist shareholder Carl Icahn to buy up to 13.2 million shares in the movie studio.