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Marsh & McLennan Companies' (MMC) history dates back to 1871. Marsh, the risk and insurance services subsidiary, has a distinguished history as the world's leading insurance broker and risk management advisor.

 

In 1923 MMC made its first major business extension – into reinsurance broking – with the acquisition of the newly formed Guy Carpenter & Company.

 

In 1959, MMC expanded into human resource consulting, acquiring Canadian benefits consultant William M. Mercer Limited. Today, Mercer is a global leader for HR and related financial advice, products, and services.

 

In the 1980s, MMC expanded into specialty consulting. Today, the Oliver Wyman Group delivers management consulting through Oliver Wyman, corporate branding and identity consulting through Lippincott, and economic analysis and advice through NERA Economic Consulting.