Fighting cancer with precision and power. Corporate Presentation | August 2025 Forward-Looking Statements This presentation contains forward-looking statements that involve substantial risks and uncertainties. All statements other than historical factual information are forward-looking statements, including without limitation statements regarding our product development activities for ficerafusp alfa and ongoing clinical trials; the ability of clinical trials to demonstrate safety and efficacy of ficerafusp ...

Company Overview - BeyondSpring Inc. is a clinical-stage global biopharmaceutical company focused on developing cancer therapies, particularly its lead asset Plinabulin, which is in late-stage clinical development for non-small cell lung cancer (NSCLC) and other cancer indications [3] Study Announcement - BeyondSpring announced a poster presentation on the 303 Study, an investigator-initiated study supported by Merck, at the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting, scheduled from May 30 to June 3 in Chicago, IL [1] 303 Study Details - The 303 Study is an open-label, single-arm Phase 2 study evaluating the efficacy and safety of Plinabulin in combination with docetaxel and pembrolizumab for previously treated patients with metastatic NSCLC who have progressed after anti-PD-(L)1 inhibitor therapy [4] - The study involves 47 enrolled patients and is conducted at Peking Union Medical College Hospital in Beijing, China, with Dr. Mengzhao Wang as the principal investigator [4] - The primary endpoint is the investigator-based overall response rate (ORR), while secondary endpoints include progression-free survival (PFS), overall survival (OS), duration of response (DoR), and safety [4] Presentation Details - The presentation will take place on May 31, 2025, from 1:30 PM to 4:30 PM CDT at McCormick Place Convention Center, focusing on initial efficacy and safety results related to immune re-sensitization [5]

Core Insights - Merus N.V. announced interim clinical data for petosemtamab in combination with pembrolizumab, showing a 63% response rate among evaluable patients and a 79% overall survival rate at 12 months [1][2][3] Clinical Data Summary - The ongoing phase 2 trial included 45 patients, with 43 evaluable for efficacy, showing a confirmed overall response rate of 63% (27/43) [3] - The median progression-free survival was reported at 9 months, with a median follow-up of 14.3 months [3] - Among the evaluable patients, 6 achieved complete responses and 21 had partial responses, with responses observed across different PD-L1 levels [3] - The combination treatment was generally well tolerated, with 60% of patients experiencing grade ≥3 treatment-emergent adverse events [3] Future Outlook - The company anticipates sharing top-line interim readouts from one or both phase 3 trials in 2026, indicating a strong belief in the potential of petosemtamab to become a new standard of care for head and neck cancer [2][3]