CSL Ltd. is a biopharmaceutical company, which engages in the research, development, manufacture, marketing and distribution of biopharmaceutical and allied products. It operates through the CSL Behring and Seqirus segments. The CSL Behring segment provides plasma-derived and recombinant products, and operates plasma collection networks through CSL Plasma. The Seqirus segment manufactures and distributes non-plasma biotherapeutic products and develops influenza related products. The company was founded on November 2, 1961 and is headquartered in Parkville, Australia.