DryShips Inc. (Nasdaq:DRYS), Hercules Offshore Inc. (Nasdaq:HERO) and Tessera Technologies (Nasdaq:TSRA) are among the most actively traded companies in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Silver Standard Resources Inc. (Nasdaq:SSRI), Canadian Solar Inc. (Nasdaq:CSIQ), Pan American Silver Corp. (Nasdaq:PAAS), ViroPharma Inc. (Nasdaq:VPHM), AeroVironment Inc. (Nasdaq:AVAV) and Buffalo Wild Wings Inc. (Nasdaq:BWLD).

Here are the most actively traded companies among small caps:

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