Dec. 31, 2010: $27.91
Dec. 31, 2009: $30.48
Microsoft shares fell more than $3.50 per share during a nine-day span in May, its biggest dip of the year. Last month, the company reported that it had sold 1.5 million Windows 7 smart phone during the first six weeks of availability.
Microsoft also lost some key executives in 2010, perhaps most importantly Chief Software Architect Ray Ozzie.