BeOne Presents Compelling Data in Hard-to-Treat Liver and Lung Cancers at ESMO 2026

Potential first-in-class GPC3 x 4-1BB bispecific achieves a 36% confirmed response rate at Phase 3 dose and favorable safety profile in heavily pretreated liver cancer

Brain-penetrant PRMT5 inhibitor shows promising antitumor and CNS activity in the largest publicly shared MTAP-deficient dataset

First clinical data of CEA-targeting ADC demonstrates encouraging and sustained responses in CEAhigh NSCLC

SAN CARLOS, Calif., October 24, 2026--BeOne Medicines Ltd. (Nasdaq: ONC; HKEX: 06160; SSE: 688235), a global oncology company, today announced new data from multiple differentiated investigational medicines across its priority solid tumor disease areas at the European Society for Medical Oncology (ESMO) Congress 2026 (October 23–27, Madrid). The presentations span gastrointestinal, lung, and breast cancers, and reflect the growing momentum of BeOne's solid tumor franchise.

Mark Lanasa, M.D., Ph.D., Chief Medical Officer, Solid Tumors at BeOne, said:

"At ESMO, we are showing how our strategy of matching the right modality to disease biology is translating into meaningful clinical progress. Our GPC3 x 4-1BB bispecific antibody continues to be well tolerated and demonstrates durable activity with longer follow up in patients with heavily pre-treated hepatocellular carcinoma, while the first clinical data from our brain-penetrant PRMT5 inhibitor and CEA-targeting ADC expand our innovation in non-small cell lung cancer. Alongside the global Phase 3 KANDELA-302 study of our CDK4 inhibitor in breast cancer, these advances mark a clear step forward as BeOne's solid tumor pipeline moves from promising science toward medicines with the potential to improve outcomes in difficult-to-treat cancers."

Potential first-in-class GPC3×4-1BB bispecific continues to demonstrate compelling and durable activity in heavily pretreated HCC (Proffered Paper: 1679O; October 24, 10:15–11:45 CET)

Patients with advanced HCC who progress after immunotherapy face a high unmet need, with no established standard of care and five-year survival of only approximately 20%1,2. BGB-B2033 is an investigational bispecific antibody designed to address this gap by activating 4-1BB on T cells in the presence of GPC3-expressing tumor cells, concentrating immune activation at the tumor site, and limiting systemic toxicity, a key consideration for HCC patients who frequently suffer from underlying liver disease.

Updated Phase 1 results include the first disclosure of dose-optimization data and longer follow-up from dose escalation. Among 94 patients, 93.6% had received prior PD-(L)1 therapy and 61.7% had received both PD-(L)1 therapy and a tyrosine kinase inhibitor (TKI). Highlights include: