Exhibit 99.1 · Reported updated clinical data from Part B of the DeFianCe Study of sirexatamab plus bevacizumab and chemotherapy in CRC patients. In March 2025, the Company announced updated preliminary data from Part B of the DeFianCe study (NCT05480306), a Phase 2, open-label, global study of sirexatamab in combination with bevacizumab and chemotherapy (Sirexatamab Arm) compared to bevacizumab and chemotherapy (Control Arm) in patients with MSS CRC who have received one prior systemic therapy for advanced ...