Benzinga's Top Upgrades - Cognex (NASDAQ:CGNX), Biogen (NASDAQ:BIIB)

Analysts at KLR Group upgraded Energen Corporation EGN from Accumulate to Buy. Energen shares rose 1 percent to close at $50.66 on Friday.
Maxim Group upgraded Potbelly Corp PBPB from Hold to Buy. Potbelly shares closed at $11.90 on Friday.
Credit Suisse upgraded Time Warner Inc TWX from Neutral to Outperform. Time Warner shares gained 1.30 percent to $87.54 in pre-market trading.
Analysts at CLSA upgraded Cognex Corporation CGNX from Underperform to Outperform. Cognex shares rose 2.97 percent to $52.28 in pre-market trading.
Citigroup upgraded NRG Energy Inc NRG from Sell to Neutral. NRG Energy shares climbed 8.88 percent to close at $11.03 on Friday.
Evercore ISI Group upgraded Cummins Inc. CMI from Hold to Buy. Cummins shares rose 2.90 percent to $127.91 in pre-market trading.
Analysts at Piper Jaffray upgraded Biogen Inc BIIB from Neutral to Overweight. Biogen shares rose 3.62 percent to $287.02 in pre-market trading.
Analysts at Mizuho upgraded Macerich Co MAC from Underperform to Neutral. Macerich shares rose 0.72 percent to close at $67.57 on Friday.
KeyBanc upgraded ITT Inc. ITT from Sector Weight to Overweight. ITT shares dropped 2.66 percent to close at $33.26 on Friday.
Analysts at Cowen & Co. upgraded Harris Corporation HRS from Market Perform to Outperform. Harris shares rose 1.18 percent to $95.36 in pre-market trading.