Exhibit 99.1 Athira Pharma Reports Third Quarter 2024 Financial Results and Pipeline and Business Updates Expects to complete healthy volunteer Phase 1 clinical study of ATH-1105 by year end and begin dosing ALS patients in 2025 BOTHELL, Wash., November 7, 2024 – Athira Pharma, Inc. (NASDAQ: ATHA), a clinical-stage biopharmaceutical company focused on developing small molecules to restore neuronal health and slow neurodegeneration, today reported financial results for the quarter ended September 30, 2024, a ...