The Plot Thickens At Amgen; Piper Still Overweight By: Benzinga via Benzinga March 16, 2016 at 15:25 PM EDT Piper Jaffray said the Street is underestimating the implications of the lawsuit of Amgen, Inc. (NASDAQ: AMGN) against Regeneron ... Read More >> Related Stocks: Amgen Regeneron Pharmaceuticals Sanofi-Aventis S.A. ADR