Benzinga's Top Upgrades - Exelon (NASDAQ:EXC), Celestica (NYSE:CLS)

Deutsche Bank upgraded Perrigo Company plc PRGO from Hold to Buy. Perrigo shares close at $91.52 on Thursday.
Barclays upgraded Penn West Petroleum Ltd (USA) PWE from Underweight to Equal-weight. Penn West Petroleum shares closed at $1.38 on Thursday.
CLSA upgraded Sherwin-Williams Co SHW from Outperform to Buy. Sherwin-Williams shares closed at $290.63 on Thursday.
Analysts at Argus Research upgraded UnitedHealth Group Inc UNH from Hold to Buy. UnitedHealth shares rose 0.44 percent to $143.50 in pre-market trading.
Jefferies upgraded SINA Corp SINA from Hold to Buy. SINA shares closed at $52.03 on Thursday.
Analysts at Deutsche Bank upgraded Exelon Corporation EXC from Hold to Buy. Exelon shares gained 0.30 percent to $36.57 in pre-market trading.
Analysts at Atlantic Equities upgraded Viacom, Inc. VIAB from Underperform to Neutral. Viacom shares closed at $45.30 on Thursday.
Analysts at BB&T Capital upgraded Joy Global Inc. JOY from Underperform to Hold. Joy Global shares fell 0.60 percent to $28.03 in pre-market trading.
Analysts at Canaccord Genuity upgraded Celestica Inc CLS from Hold to Buy. Celestica shares gained 4.66 percent to $10.55 in pre-market trading.