Benzinga's Top Upgrades

Analysts at Oppenheimer upgraded Chemtura Corp

from “perform” to “outperform.” CHMT's shares closed at $15.86 yesterday. Chemtura's trailing-twelve-month ROE is 11.90%. Northland Securities upgraded Acme Packet Inc

from “market perform” to “outperform.” APKT's stock closed at $27.41 yesterday. Acme Packet's trailing-twelve-month revenue is $307.32 million. Jefferies & Company upgraded Vantage Drilling Company

from “hold” to “buy.” VTG's shares closed at $1.53 yesterday. Vantage Drilling's trailing-twelve-month operating margin is 20.02%. Northland Securities upgraded AXT Inc

from “market perform” to “outperform.” AXTI's shares closed at $6.15 yesterday. AXT's PEG ratio is 0.60.