Smith & Wesson Holding Corp. (Nasdaq:SWHC), Wind River Systems Inc. (Nasdaq:WIND) and Noven Pharmaceuticals Inc. (Nasdaq:NOVN) are among the most actively traded companies in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Centennial Communications Corp. (Nasdaq:CYCL), Century Aluminum Co. (Nasdaq:CENX), Canadian Solar Inc. (Nasdaq:CSIQ), Matrixx Initiatives (Nasdaq:MTXX), GT Solar International Inc. (Nasdaq:SOLR) and Amkor Technology Inc. (Nasdaq:AMKR).

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