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NEW YORK ( TheStreet) -- Marsh & McLennan Companies (NYSE: MMC) hit a new 52-week high Monday as it is currently trading at $33.50, above its previous 52-week high of $33.47 with 967,468 shares traded as of 10:50 a.m. ET. Average volume has been 2.6 million shares over the past 30 days. Marsh & McLennan Companies has a market cap of $18.15 billion and is part of the financial sector and insurance industry. Marsh & McLennan Companies, Inc., a professional services company, provides advice and solutions in the areas of risk, strategy, and human capital. It operates in two segments, Risk and Insurance Services, and Consulting.