Central Garden & Pet Co. (Nasdaq:CENT), Gibraltar Industries Inc (Nasdaq:ROCK) and Overhill Farms Inc (Nasdaq:OFI) are among the biggest percentage gainers in Thursday's trading among companies with market capitalizations under $750 million.

RH Donnelley Corp (Nasdaq:RHD), China Technology Development Group Corp (Nasdaq:CTDC) and Colfax Corp (Nasdaq:CFX) are also among the biggest percentage gainers.

Here are the biggest percentage gainers among small caps:

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