Dendreon Corp. (Nasdaq:DNDN), DryShips Inc. (Nasdaq:DRYS) and A Power Energy Generation Systems Ltd. (Nasdaq:APWR) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: BLDRS Emerging Markets 50 ADR Index (Nasdaq:ADRE), Medarex Inc. (Nasdaq:MEDX), UAL Corp. (Nasdaq:UAUA), Dress Barn Inc. (Nasdaq:DBRN), Gymboree Corp. (Nasdaq:GYMB) and Take Two Interactive Software Inc. (Nasdaq:TTWO).

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