GlaxoSmithKline

GlaxoSmithKline (GSK) develops and manufactures prescription medicines and vaccines for infectious disease, HIV, respiratory, oncology and immunology, selling to healthcare systems and distributors worldwide. The London‑headquartered public company was formed in 2000 from the merger of Glaxo Wellcome and SmithKline Beecham, and in 2022 spun off its consumer health business as Haleon. GSK’s revenue comes primarily from proprietary drug and vaccine sales supported by global R&D and commercial partnerships.