GlaxoSmithKline 葛兰素史克
（重定向自SmithKline）
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![The historic Glaxo factory in Bunnythorpe, New Zealand, with the Glaxo Laboratories sign still visible](/Images/godic/202502/11/Glaxo_Factory,_Bunnythorpe,_New_Zealand_030327.JPG")
![Beecham's Clock Tower, constructed 1877, part of the Beecham's factory, St Helens](/Images/godic/202502/11/BeechamsBuilding0327.jpg")
![](/Images/godic/202502/11/GlaxoSmithKline_headquaters_-Brentford,_London,_England-2Oct20110327.jpg")
GlaxoSmithKline plc (GSK) is a British pharmaceutical company headquartered in Brentford, London. Established in 2000 by a merger of Glaxo Wellcome and SmithKline Beecham, GSK was the world's sixth largest pharmaceutical company as of 2015, after Pfizer, Novartis, Merck, Hoffmann-La Roche and Sanofi. Andrew Witty has been the chief executive officer since 2008.