CSL Limited is an Australian biotechnology company headquartered in Melbourne and one of the world’s leading developers and manufacturers of plasma-derived therapies, vaccines, and biotherapeutics. Founded in 1916 as a government laboratory, it now operates globally through its subsidiaries CSL Behring and CSL Seqirus. The company focuses on treating rare and serious conditions such as blood clotting disorders, immune deficiencies, respiratory diseases, and neurological disorders, while also being one of the largest producers of influenza vaccines worldwide. CSL emphasizes innovation, scientific research, and the advancement of biomedical technologies, with its products available in over 100 countries.