DryShips Inc. (Nasdaq:DRYS), Solarfun Power Holdings Co Ltd. (Nasdaq:SOLF) and USANA Health Sciences Inc. (Nasdaq:USNA) are among the most actively traded companies in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Canadian Solar Inc. (Nasdaq:CSIQ), VisionChina Media Inc (Nasdaq:VISN), OYO Geospace Corp. (Nasdaq:OYOG), Synta Pharmaceuticals Corp (Nasdaq:SNTA), Tower Group Inc. (Nasdaq:TWGP) and Northwest Pipe Co (Nasdaq:NWPX).

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