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Rohm and Haas
Rohm and Haas
Return: +18%

Another big acquisition winner: chemicals manufacturer Rohm and Haas. When the Philadelphia-based business announced July 10 its sale to Dow Chemical Company, which was bolstered by a $3 billion preferred stock purchase by Warren Buffett, investors cheered: shares rose 64% that day.

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Last updated October 13 2008: 4:43 PM ET
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