DryShips Inc. (Nasdaq:DRYS), Acorda Therapeutics Inc. (Nasdaq:ACOR) and Abiomed Inc. (Nasdaq:ABMD) are among the most actively traded companies in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Geron Corp. (Nasdaq:GERN), Medarex Inc. (Nasdaq:MEDX), GMX Resources Inc. (Nasdaq:GMXR), UAL Corp. (Nasdaq:UAUA), A Power Energy Generation Systems Ltd. (Nasdaq:APWR) and NetGear Inc. (Nasdaq:NTGR).

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