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8. Rohm & Haas
Rohm & Haas
Fortune 500 rank: 281
2008 revenue: $9.6 billion
2008 total shareholder return: 19.4%

Chemical giant Rohm & Haas, which produces paints and electronic technologies, announced its $15.3 billion hook-up with Dow Chemical Co. in July, sending shares through the roof. Dow agreed to buy Rohm & Haas for $78 a share, a premium of 74% over its prior-day closing of $44.83.

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Last updated April 20 2009: 1:34 PM ET
2009 Fortune 500
Top 50
Top 50
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