United States securities and exchange commission logo May 19, 2022 Brian Varnum, Ph.D. Chief Executive Officer Armata Pharmaceuticals, Inc. 4503 Glencoe Avenue Marina del Rey, California 90292 Re: Armata Pharmaceuticals, Inc. Registration Statement on Form S-3 Filed May 16, 2022 File No. 333-264961 Dear Dr. Varnum: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Jane Park at 202-551-7439 with any questions. Sincerely, Division of Corporation Finance Office of Life Sciences cc: Faith Charles, Esq.