· New analyses from the Phase 3 Vivacity-MG3 study support the impact of IMAAVY in anti-AChR+a, anti-MuSK+b adult patients with generalized myasthenia gravis (gMG) including those early in their disease, participants with lower symptom burden and those who experienced common infections · To address an important evidence gap, the PETUNIAc study design will be presented – demonstrating the innovative way pregnancy outcomes data will be collected following treatment with IMAAVY · IMAAVY, an immunoselective neonatal Fc receptor (FcRn) blocker, is designed to target and reduce pathogenic immunoglobulin G (IgG) autoantibodies associated with generalized myasthenia gravis (gMG)

· Patients in the IMAAVY 30 mg/kg treatment groupa achieved statistically significant durable hemoglobin responseb, with mean hemoglobin improvement of at least 1 g/dL as early as Week 1c · More patients treated with IMAAVY experienced improvement in fatigued and corticosteroid dose reductionse · IMAAVY is designed to target pathogenic immunoglobulin G (IgG) autoantibodies in warm autoimmune hemolytic anemia while preserving immune function · Pivotal results will be presented at EHA 2026

Expands the Company’s expertise in targeting pan-KRAS and other drivers of hard-to-treat cancers • Acquisition adds a proprietary degrader antibody conjugate platform designed to overcome key limitations of existing therapeutic approaches • Strengthens leadership in next-generation antibody engineering to accelerate oncology innovation