Top Cancer Drug & Biotech Companies in 2026: Oncology Leaders, Gene Therapy & Next-Generation Cancer Treatment
OneDayMD Oncology Intelligence • 2026 Update From Keytruda and CAR-T to antibody-drug conjugates, radioligand therapy and Gendicine gene therapy. Reviewed/updated: September 2026 The global cancer-treatment industry is entering a new era. Oncology is no longer defined simply by chemotherapy and conventional small-molecule drugs. The modern cancer-treatment ecosystem includes immune checkpoint inhibitors, targeted therapies, antibody-drug conjugates (ADCs), bispecific antibodies, CAR-T cells, radioligand therapies, protein degraders, cancer vaccines, oncolytic viruses and gene therapies. This updated 2026 review therefore looks beyond a simple sales ranking. It evaluates the world's leading cancer-drug and biotechnology companies according to oncology commercial scale, therapeutic innovation, pipeline strength, platform technology, strategic importance and potential influence on the future of cancer treatment . Key takeaway: ...