Complex sentence: Founded in 1989, CAT was acquired by AstraZeneca for £702m in 2006, who subsequently purchased MedImmune LLC, and merged the two together to create a new global biologics arm under the name MedImmune, whose Cambridge, UK operations conduct business as MedImmune Limited.
Split into simpler sentences: Founded in 1989, CAT was acquired by AstraZeneca for £702m in 2006. AstraZeneca subsequently acquired MedImmune LLC, which it combined with CAT to form a global biologics division called MedImmune, whose UK operations conduct business as MedImmune Limited.