GlaxoSmithKline Gets $256 Million From Selling Down Quest Diagnostics Inc. Stake Published: Mar 20, 2009 LONDON, March 20 (Reuters) - GlaxoSmithKline has sold a further chunk of its stake in Quest Diagnostics for $256 million. Related links Forbes This will open in a new window Guardian This will open in a new window The Business Journals This will open in a new window Email this Facebook Twitter LinkedIn Pinterest Reddit Back to news