Aratana, Eli Lilly Team Create 'Watershed Contract' For Pet Biotech Sector By: Benzinga via Benzinga April 25, 2016 at 17:45 PM EDT In Monday's after-hours session, shares of Aratana Therapeutics Inc (NASDAQ: PETX) were halted as a deal with Elanco Animal ... Read More >> Related Stocks: Aratana Theraptcs Eli Lilly