BlackBerry's Jim Balsillie

Jim Balsillie, the former co-CEO of Research in Motion (now known as BlackBerry), has been until recently the third-largest shareholder in the company with 5.1 percent ownership. According to Financial Post, however, he's cut his stake in BlackBerry altogether, now reporting a grand total of zero shares. Balsillie stepped down as co-CEO in January and resigned from the board in March; this next big move away from the company will likely lead to speculation that his interest or faith in BlackBerry's future is waning, though his successor certainly would beg to differ.