Benzinga's Top Upgrades, Downgrades For May 15, 2018 By: Benzinga via Benzinga May 15, 2018 at 10:45 AM EDT Top Upgrades Cowen & Co. upgraded Pentair plc (NYSE: PNR) from Underperform to Outperform. Pentair shares rose 0.36 ... Read More >> Related Stocks: Applied Materials Athena Technology Acquisition Corp Cl A Atyr Pharma Inc CBS Corp Cheniere Energy Partners LP Holdings Llc Fibrogen Inc CS Ford Motor Graftech International Ltd Intellia Thera CS KLA-Tencor Corp Level One Bancorp Inc Maiden Holdings Ltd Mks Instruments Inc Nvent Electric Plc Pentair plc Pivotal Software Inc Scotts Miracle-Gro Company State Bank Finl Corp Symantec Corp Ternium S.A. ADR Travelport Worldwide Ltd US Foods Holding Ulta Beauty Inc Valeant Pharmaceuticals International, Inc. WT Offshore Willis Towers Watson Public Ltd Zions Bancorp