| http://www.w3.org/ns/prov#value | - surance, 2011 Additional Info Website www.willis.com Headquarters London, United Kingdom Size 5000+ Employees Founded Unknown Type Company - Public (WSH) Industry Insurance Revenue $2 to $5 billion (CAD) per year Competitors Aon, Arthur J. Gallagher & Co., Marsh & McLennan Companies Willis Group Holdings plc is a leading global risk advisor, insurance and reinsurance broker.
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