DryShips Inc. (Nasdaq:DRYS), ViroPharma Inc. (Nasdaq:VPHM) and Canadian Solar Inc. (Nasdaq:CSIQ) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Provident Bankshares Corp. (Nasdaq:PBKS), GT Solar International Inc. (Nasdaq:SOLR), Arena Pharmaceuticals Inc. (Nasdaq:ARNA), Verigy Ltd. (Nasdaq:VRGY), Palm Inc. (Nasdaq:PALM) and Ceradyne Inc. (Nasdaq:CRDN).

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