Blackberry's Former Chief Sold Entire Stake in Company Last Year

Company struggling to recover smart phone market

Jim Balsillie, formerly the largest shareholder and co-chief executive of struggling smartphone company BlackBerry, has sold his entire shareholding in the business.

The move, revealed by a filing released this week, occurred before the end of 2012, weeks ahead of the launch of the new BB10 software and Z10 handset by new chief executive Thorsten Heins in an attempt to reboot the company's fortunes.