Allergan CEO: Bill Ackman battle was all-consuming By: CNBC.com News February 10, 2015 at 09:36 AM EST Allergan Chairman and CEO David Pyott tells CNBC that dealing with "raiders" like Bill Ackman and Valeant Pharmaceuticals was a full-time job. Read More >> Related Stocks: Actavis Plc Sentinelone Inc Cl A