r, said he had sold his entire stake in the company -- more than 26 million shares or roughly a five-percent stake -- as of December 31, 2012.The news comes after BlackBerry last month launched two glitzy new devices, the Q10 and Z10, in a bid to revive its sagging fortunes and regain lost market share from Apple and other smartphone makers such as Samsung.Balsillie joined the company in 1992 and