KeyBanc On Specialty Chemicals: Upgrades Chemtura, Innospec To Overweight By: Benzinga via Benzinga April 05, 2016 at 09:59 AM EDT Both these petroleum additive companies – Chemtura Corp (NYSE: CHMT) and Innospec Inc. (NASDAQ: IOSP) – have favorable ... Read More >> Related Stocks: Innospec Inc