Exhibit 99.1 GENMAB 2023 ANNUAL REPORT Table of Contents MANAGEMENT’S REVIEW Our 2030 Vision 2 Chair’s Statement 2 Letter from the CEO 3 2023 at a Glance 5 Consolidated Key Figures 6 2024 Outlook 9 Our Strategy 11 Who We Are 13 Business Model 15 Research and Development Capabilities 15 Bringing Our Own Innovative Medicines to Patients 16 Antibody Discovery and Development 18 Products and Technologies 18 Corporate Social Responsibility and Sustainability Commitments 39 Genmab’s Task Force on Climate-related ...