BioNTech SE is a German multinational biotechnology company headquartered in Mainz that develops immunotherapies and vaccines, particularly for cancer and infectious diseases, using technologies like mRNA, chimeric antigen receptors, and AI-driven drug discovery. It operates a fully integrated model from research and development to manufacturing and commercialization, with a global network of sites. BioNTech gained prominence for its COVID-19 vaccine developed with Pfizer and focuses on oncology and infectious diseases to address unmet medical needs.