Fourth Quarter & Full Year 2022 Financial & Business Update slide image

Fourth Quarter & Full Year 2022 Financial & Business Update

Percentage of change from baseline (%) Advancing Disitamab Vedotin (DV) in Urothelial Cancer and other Solid Tumors with Global Rights Excluding Parts of Asia¹ 100 90 80- 70- 1L/2L HER2+ mUC data reinforce vedotin ADC combinability with anti-PD1s² DV + anti-PD1 data presented by RemeGen at ASCO³ HER2 Status: HERO HER 1+ HER 2+ HER 3+ DV + toripalimab demonstrated a 71.8% CORR, which compares to response rates of ~50% seen with DV monotherapy Seagen Disitamab Vedotin Differentiated HER2- targeted antibody conjugated to vedotin drug-linker and MMAE payload Ongoing phase 2 monotherapy study in 2L MUC for potential FDA accelerated approval • Granted FDA Breakthrough Therapy Designation ⚫ Phase 3 Keytruda combination 1L mUC trial to initiate in 2023 Additional studies planned in HER2 low BC . and other HER2-expressing solid tumors HER2 low BC studies to include monotherapy and combinations with TUKYSA or Keytruda ⚫ Gastric cancer and other solid tumor monotherapy and combination trials planned with TUKYSA 1 RemeGen maintains development and commercialization rights for Asia, excluding Japan and Singapore; 2 Not a pivotal trial; 3 Sheng, et al, ASCO 2022 Abstract 4518; not approved for use; most common TRAES were AST increase (65.9%), ALT increase (63.4%) and peripheral sensory neuropathy (63.4%) 26
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