DryShips, Rigel Pharmaceuticals and Atheros Communications lead small-cap volume in pre-market

DryShips Inc. (Nasdaq:DRYS), Rigel Pharmaceuticals Inc. (Nasdaq:RIGL) and Atheros Communications Inc. (Nasdaq:ATHR) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Buffalo Wild Wings Inc. (Nasdaq:BWLD), Pan American Silver Corp. (Nasdaq:PAAS), Eagle Bulk Shipping Inc. (Nasdaq:EGLE), Genoptix Inc. (Nasdaq:GXDX), Hercules Offshore Inc. (Nasdaq:HERO) and BE Aerospace Inc. (Nasdaq:BEAV).

Here are the most actively traded companies among small caps:

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