Benzinga's Top Upgrades By: Benzinga via Benzinga July 27, 2016 at 09:00 AM EDT Guggenheim Securities upgraded SunPower Corporation (NASDAQ: SPWR) from Neutral to Buy. SunPower shares gained 3.52 ... Read More >> Related Stocks: Alaska Air Group Analog Devices Apple Coach Edwards Lifesciences Linear Technology Corp Logmein Inc Sunpower Corp