BeyondSpring Reports 2025 Year-End Financial Results

Plinabulin (BeyondSpring's Lead Program):

• Phase 3 Survival Benefit Confirmed: Plinabulin combined with docetaxel demonstrated statistically significant overall survival benefit vs. standard of care docetaxel in EGFR wild-type NSCLC patients whose tumors progressed after first line therapy — DUBLIN-3 study results published in The Lancet Respiratory Medicine
• Confirmatory Trial Planned: Based on DUBLIN-3 Phase 3 data and US FDA discussions, BeyondSpring is advancing DUBLIN-4, a confirmatory global Phase 3 study in a biomarker-selected EGFR wild-type NSCLC patient population progressed on immune checkpoint inhibitors (NCT07361484)
• Overcoming Immunotherapy Resistance: Early clinical data at MD Anderson Cancer Center and Peking Union Hospital suggest Plinabulin may restore sensitivity to checkpoint inhibitors — a significant unmet need affecting most patients on PD-1/PD-L1 therapies – Results published in Cell Press journal Med 2025 and presented at SITC 2025

SEED Therapeutics (Reported as Discontinued Operations):

• First Patient Dosed for lead oncology program: ST-01156, a novel oral RBM39 degrader, initiated Phase 1a clinical trials in January 2026 following IND clearance in both the U.S. and China
• Financing Strengthened: Completed $30 million Series A-3 financing; appointed Dr. Bill Desmarais as Chief Financial Officer and Chief Business Officer

FLORHAM PARK, N.J., March 25, 2026 (GLOBE NEWSWIRE) -- BeyondSpring Inc. (NASDAQ: BYSI) (“BeyondSpring” or the “Company”), a clinical-stage company developing transformative therapies for the treatment of cancer and other diseases, today announced its financial results for the year ended December 31, 2025, and highlighted late-stage clinical progress for Plinabulin and strategic developments related to its equity interest in SEED Therapeutics (“SEED”).

2025: Clinical and Operational Progress“2025 was a year of important clinical and operational progress for BeyondSpring and SEED Therapeutics,” said Dr. Lan Huang, Co-Founder, Chairman and Chief Executive Officer of BeyondSpring. “We advanced our Phase 3 Plinabulin program, generated meaningful clinical data, and strengthened our strategic and financial position.”

“BeyondSpring made meaningful progress advancing Plinabulin in Phase 3 NSCLC, while SEED Therapeutics reached a critical milestone — initiating its first clinical trial following IND clearance in both the U.S. and China — and strengthened its leadership team and capital resources.”

Positioned for 2026 and Beyond“With a solid scientific and clinical foundation and clear regulatory pathways, we believe BeyondSpring and SEED are well positioned for the next stage of development,” Dr. Huang concluded. “As we enter 2026, we remain focused on advancing the DUBLIN-4 confirmatory trial for Plinabulin in non-squamous EGFR wild-type NSCLC post immune checkpoint inhibitors, supporting SEED’s Phase 1a clinical program for ST-01156 in solid tumors, and creating long-term value for our shareholders.”

Recent Clinical and Business UpdatesPlinabulin Demonstrates Overall Survival Benefit in Phase 3 NSCLC Study; Confirmatory Trial PlannedThere is a significant unmet need in EGFR wild-type NSCLC following immune checkpoint inhibitor (ICI) therapy, where numerous Phase 3 studies have failed to improve overall survival over standard of care docetaxel.

BeyondSpring reported positive Phase 3 results from the DUBLIN-3 study evaluating plinabulin in combination with docetaxel in second- and third-line (2/3L) EGFR wild-type non-small cell lung cancer (NSCLC). The study demonstrated a statistically significant and clinically meaningful overall survival (OS) benefit compared to docetaxel alone (ITT, n=559), with results published in The Lancet Respiratory Medicine.

At IASLC North America and ESMO Asia in December 2025, BeyondSpring presented updated data from the mechanism-targeted non-squamous NSCLC population (n=332; 24-month after database lock), in which the combination achieved:

• OS hazard ratio (HR) of 0.72 (p=0.0078)
• Median OS improvement of 2.5 months vs. docetaxel
• Doubling of 2-year and 3-year survival rates
• Favorable safety profile, reducing grade 4 neutropenia from >30% to 5% (p