Citi Downgrades Regeneron, Citing 'Underappreciated' Risk By: Benzinga via Benzinga December 01, 2017 at 09:57 AM EST Regeneron Pharmaceuticals Inc (NASDAQ: REGN) announced Monday the failure and discontinuation of two trials for angiopoietin2. Between ... Read More >> Related Stocks: Novartis Ag ADR Regeneron Pharmaceuticals