 NEW YORK, May 13, 2021 PRNewswire -- Purcell Julie Lefkowitz LLP, a class action law firm dedicated to representing shareholders nationwide, is investigating a potential breach of fiduciary duty claim involving the board of directors of Armata Pharmaceuticals Inc. NYSE American: ARMP. If you are a shareholder of Armata Pharmaceuticals Inc. and are interested in obtaining additional information regarding this investigation, free of charge, please visit us at: You may also contact Robert H. 