Rafael Amado
Analyst · Jonathan Chang from Leerink Partners
Thank you, Samantha. I will begin with a few highlights from our global pipeline, starting with ZL-1310 or Zoci. Two weeks ago, at the triple meeting conference, we presented updated Phase I data in previously treated extensive stage small cell lung cancer. This global study enrolled 115 patients across the U.S., Europe and China. At baseline, 90% of patients had received a PD-1 or PD-L1 therapy, nearly 1/3 had brain metastases and several had progressed on a prior DLL3 targeted therapy, including tarlatamab, making this a very difficult to treat heavily pretreated patient population. At the 1.6 milligrams per kilogram dose, we observed an overall response rate of 68% and a disease control rate of 94%, among the strongest efficacy signals reported in the second line setting. Importantly, we also saw robust activity in patients with brain metastases, including an 80% overall response rate in lesions, which had received no prior treatment of any kind, suggesting that Zoci may offer a new way to control both systemic as well as intracranial disease without interrupting therapy, a potential game changer in terms of speed to treatment for these patients whose tumors tend to be growing very fast. Across all doses and lines, the median duration of response was 6.1 months, and the median progression-free survival was 5.4 months, which is highly encouraging for a monotherapy in this refractory population across doses and lines of therapy. Data from the 1.2 and 1.6 milligrams per kilogram cohort continue to mature as enrollment continues and patients remain on treatment. Zoci also continues to demonstrate a best-in-class safety profile. At the 1.6 milligrams per kilogram dose, grade 3 or higher treatment-related adverse events were observed in only 13% of patients, far below the 35% to 50% rate seen with other ADCs in this setting. There were no drug-related discontinuations or deaths and only 2 Grade 1 interstitial lung disease cases across both expansion doses of 1.2 and 1.6 milligrams per kilogram. This combination of deep efficacy and favorable tolerability positions Zoci as an ideal candidate for the first-line combination where safety is paramount. We've now begun enrollment in our registrational Phase III trial in extensive stage small cell lung cancer with the potential for an accelerated approval submission. We're also advancing our first-line strategy with plans to initiate a Phase III study next year following results of our ongoing combination study evaluating Zoci plus PD-L1 with and without chemotherapy. In addition, we see significant opportunity for Zoci as a backbone therapy in novel mechanism combinations. We plan to initiate studies with agents with ethanol and complementary mechanisms of action, and we will share details once the studies are posted on clinicaltrials.gov. Beyond small cell lung cancer, Zoci is being evaluated in Neuroendocrine Carcinomas or NAC, which have poor prognosis and no targeted therapy despite high DLL3 expression. Early data with ZL-1310 are encouraging, and we plan to present results in the first half of next year and to move into a registrational study thereafter. Beyond Zoci, our next wave of innovative global assets continue to advance rapidly. ZL-1503, our internally discovered IL-13/IL-31 bispecific antibody for atopic dermatitis recently entered Phase I. Its dual mechanism targets both itch and inflammation and its extended half-life offers potential for less frequent dosing. A subcutaneous formulation is being developed. Preclinical results support its use in other inflammatory diseases. First-in-human data are expected in 2026. ZL-6201 is an internally discovered LRRC15 targeted antibody with a next-generation payload linker. It remains on track for a U.S. IND submission by year-end and a global Phase I study initiation early next year for patients with cancer that have tumor cell or tumor stroma expressing this target. ZL-1222 is another internally discovered asset. It is a next-generation PD-1 IL-12 immunocytokine designed to deliver cytokine signaling directly into the tumor microenvironment while preserving PD-1 checkpoint blockade. IND-enabling work is underway, and we expect to move quickly towards an IND once data are available. Now turning to our key late-stage regional programs in immunology and neuroscience. The Efgartigimod continues to expand across multiple autoimmune indications. The ADAPT SERON study in seronegative gMG was positive, the first global Phase III trial to show clinically meaningful improvements across all 3 gMG subtypes, MuSK+, LRP4+, and triple seronegative. Three additional Phase III readouts in Ocular myasthenia gravis, Myositis and Thyroid eye disease are expected next year with China contributing to global enrollment. For Povetacicept, our partner, Vertex recently received FDA breakthrough therapy designation for IgAN. Enrollment of the global RAINIER Phase 3 is complete with an interim analysis planned for the first half of 2026, where patients from China are included and potentially supporting an accelerated approval submission next year. The global pivotal Phase II/III study in primary membranous nephropathy was initiated in October, and we're on track to enroll patients in China this quarter. Together, these achievements reflect the depth and quality of our pipeline, one that is advancing with speed and efficiency and with a clear focus on novel mechanisms and clinical differentiation. In summary, over the next 12 months, we expect to reach several important milestones across our global portfolio. For Zoci, we expect a catalyst-rich year with updated intracranial data, first-line small cell lung cancer combination data and results in neuroendocrine carcinoma in the first half. In parallel, we plan to initiate registrational studies in first-line small cell lung cancer and other neuroendocrine carcinomas as well as starting studies with novel combinations across line of therapy. Beyond Zoci, we expect first-in-human data for ZL-1503 or IL-1331 and to advance ZL-6201 or LRRC15 into global Phase I development. We're also progressing ZL-1222 or anti-PD-1/ IL-12 agonist and look forward to sharing additional data in the coming year. And with that, I'll hand it over to Josh.