Aon Agrees to Buy Hewitt Associates for $4.9 Billion

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Aon Corp., the world’s largest insurance broker, agreed to buy Hewitt Associates Inc. for $4.9 billion in cash and stock to expand its division advising companies on employee pay and benefits.

Hewitt shareholders will receive $25.61 in cash and 0.6362 of an Aon share, valuing the offer at $50 a share, Chicago-based Aon said in a statement. That’s 41 percent more than Hewitt’s closing price on July 9.