Earnings Season's Biggest Surprises

Which companies had the biggest upside surprises in terms of sales this earnings season? According to FactSet, these are the ten stocks whose sales figures outperformed the Wall Street analysts the most:

• Pioneer Natural Resources, exceeded expectations by 38 percent
• Fifth Third Bancorp, exceeded expectations by 32 percent
• HollyFrontier, exceeded expectations by 19 percent
• Alexandria Real Estate Equities , exceeded expectations by 16 percent
• Lockheed Martin, exceeded expectations by 14 percent
• Electronic Arts, exceeded expectations by 14 percent
• Principal Financial Group, exceeded expectations by 12 percent
• Anadarko Petroleum, exceeded expectations by 12 percent
• Vulcan Materials, exceeded expectations by 11 percent
• Westinghouse Air Brake Technologies, exceeded expectations by 11 percent