Armata Pharmaceuticals, Inc. announced the conclusion of an End-of-Phase 2 ("EOP2") written response from the U.S. Food and Drug Administration ("FDA") and plans to advance the Company's intravenously-administered Staphylococcus aureus bacteriophage product candidate, AP-SA02, into a Phase 3 clinical study in complicated S. aureus bacteremia. The Phase 3 study is anticipated to initiate in the second half of 2026. FDA's Center for Biologics Evaluation and Research division, upon reviewing Armata's detailed EOP2 background package, confirmed that the safety and efficacy data from Armata's Phase 2a diSArm study support advancement to Phase 3. The FDA provided critical guidance on key elements of the Phase 3 study design, which will assess the superiority of AP-SA02 over the current standard of care for the treatment of complicated S. aureus Bacteremia.
Armata is addressing FDA comments, including on Chemistry, Manufacturing, and Controls ("CMC") and aligning them with the Company's existing Phase 3 manufacturing and quality strategy. The FDA also included recommendations for the future Biologics License Application and is amenable to Armata submitting a request for Qualified Infectious Disease Product Designation ("QIDP") for AP-SA02. The Company is already addressing many of the clinical and CMC comments from FDA and has submitted the request for QIDP.
The results of the Phase 2a diSArm trial were announced in May 2025 and further highlighted in a late-breaking oral presentation at IDWeek 2025?? in October 2025. The results of the Phase 2a diSArm study were announced in May 2025 and further highlighted in a late-breaking oral presentation at IDWeek 2025?
in October 2025. The primary study endpoint for the Phase 3 superiority study is expected to be clinical response at end of best available antibiotic therapy ("BAT") and 28 days later at End of Study. Safety and healthcare resource impact analyses will be included.
