DryShips, A Power Energy Generation Systems and Dendreon lead small-cap volume in pre-market

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

Also included among the results: Canadian Solar Inc. (Nasdaq:CSIQ), Pozen Inc. (Nasdaq:POZN), Clean Energy Fuels Corp. (Nasdaq:CLNE), American Superconductor Corp. (Nasdaq:AMSC), Aladdin Knowledge Systems Ltd (Nasdaq:ALDN) and ATP Oil & Gas Corporation (Nasdaq:ATPG).

Here are the most actively traded companies among small caps:

		Price at 9:06 ET	Change	% Change	Volume	Year High	Year Low
DRYS	DRYSHIPS INC	18.85	-0.65	-3.3%	19.0k	131.34	15.80
APWR	A POWER ENERGY GENERAT SYS L	5.14	-0.14	-2.7%	6.8k	31.89	3.97
DNDN	DENDREON CORP	4.95	-0.08	-1.6%	6.3k	10.00	4.15
CSIQ	CANADIAN SOLAR INC	10.79	-0.14	-1.3%	5.5k	51.80	8.67
POZN	POZEN INC	7.20	-1.80	-20.0%	3.0k	14.85	7.40
CLNE	CLEAN ENERGY FUELS CORP	10.00	+0.08	+0.8%	2.4k	19.95	8.06
AMSC	AMERICAN SUPERCONDUCTOR CORP	14.49	-0.47	-3.1%	2.4k	47.53	11.06
ALDN	ALADDIN KNOWLEDGE SYS LTD	12.66	+0.46	+3.8%	2.2k	26.94	8.29
ATPG	ATP OIL & GAS CORP	9.40	+0.04	+0.4%	2.0k	57.58	6.50
RMBS	RAMBUS INC DEL	8.00	-0.23	-2.8%	1.0k	26.41	7.10

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