Ackman Pledges Support For Actavis Bid On Allergan By: Benzinga via Benzinga November 18, 2014 at 13:10 PM EST Allergan, Inc.'s (NYSE: AGN) long-running rumble with Bill Ackman got officially called off Tuesday when the activist investor ... Read More >> Related Stocks: Actavis Plc Macy's Valeant Pharmaceuticals International, Inc.