400mg BID fed is the dose used in the ongoing Phase 3 ReDiscover-2 trial, which initiated mid-2025 11.1-month median PFS in heavily pre-treated patients with PI3Kα-mutated, HR+/HER2- metastatic breast cancer Efficacy in patients with kinase and non-kinase domain mutations is similar, with median PFS of 11.2 and 11.0 months, respectively Safety and tolerability data are consistent with 600mg BID fasted data Zovegalisib has received FDA Breakthrough Therapy designation for the Phase 3 ReDiscover-2 trial popu ...

Summary of Athira Pharma Conference Call - December 18, 2025 Company Overview - **Company**: Athira Pharma (NasdaqGS:ATHA) - **Focus**: Development of innovative therapies for diseases with unmet medical needs, specifically in oncology and neurology Key Points Discussed Transformative Acquisition - Athira announced the acquisition of rights to develop and commercialize **lasofoxifene**, a potential treatment for metastatic breast cancer, which diversifies its pipeline with a late-stage program [5][15][16] - The acquisition is expected to enhance Athira's mission to deliver transformative therapies for patients [5][14] Lasofoxifene Overview - Lasofoxifene is currently in a pivotal phase III clinical trial targeting **ER-positive HER2-negative metastatic breast cancer**, which represents about 70% of all breast cancer cases [15][16] - The global market for metastatic ER-positive HER2-negative breast cancer is projected to grow from **$10.9 billion in 2025 to over $15.9 billion by 2029** [15] - Lasofoxifene has shown promising clinical activity, achieving **13 months of progression-free survival (PFS)** in combination therapy during phase II trials [20][26] Clinical Data and Mechanism - Lasofoxifene demonstrated an **83% reduction in new-onset primary wild-type estrogen receptor-positive breast cancer** in previous studies [19] - It modulates the estrogen receptor rather than degrading it, providing tissue selectivity and sparing healthy estrogen receptors in critical tissues [19][21] - The drug has shown **significant efficacy against ESR1 mutations**, which occur in over 40% of patients and are a major mechanism of resistance in breast cancer treatments [20][21] ATH-1105 for ALS - Athira is also advancing **ATH-1105**, a potential treatment for **Amyotrophic Lateral Sclerosis (ALS)**, which affects approximately **33,000 patients in the U.S.** [37] - ATH-1105 modulates the hepatocyte growth factor (HGF) system, which is critical for neuronal health [38] - Preclinical studies have shown that ATH-1105 preserves motor function and reduces neurodegeneration in ALS models [39][40] Financial and Strategic Positioning - Athira raised **$90 million** to support its development programs, with the potential for an additional **$146 million** through warrants [46] - The financing positions the company to reach critical data readouts across both programs by the end of **2027** [46] - Athira aims to achieve peak annual U.S. sales for lasofoxifene approaching **$1 billion** if approved [35] Market Opportunity - The global breast cancer market is approximately **$55 billion**, with the second-line breast cancer segment in the U.S. exceeding **$5-$6 billion annually** [34] - Lasofoxifene's favorable tolerability profile and unique attributes position it as a potential leading therapy in this market [35][36] Conclusion - Athira is committed to advancing its promising development programs for lasofoxifene and ATH-1105, addressing significant unmet needs in metastatic breast cancer and ALS [45] - The company is optimistic about its future and the potential impact of its therapies on patient outcomes [47]