Adtran, Delta Petroleum and UAL lead small-cap volume in pre-market

Adtran Inc. (Nasdaq:ADTN), Delta Petroleum Corp. (Nasdaq:DPTR) and UAL Corp. (Nasdaq:UAUA) are among the most actively traded companies in Thursday's trading among companies with market capitalizations under $1 billion.

Also included among the results: DryShips Inc. (Nasdaq:DRYS), Canadian Solar Inc. (Nasdaq:CSIQ), Solarfun Power Holdings Co Ltd. (Nasdaq:SOLF), James River Coal Co. (Nasdaq:JRCC), JA Solar Holdings Co Ltd. (Nasdaq:JASO) and Rambus Inc. (Nasdaq:RMBS).

Here are the most actively traded companies among small caps:

		Price at 9:06 ET	Change	% Change	Volume	Year High	Year Low
ADTN	ADTRAN INC	15.57	+0.00	+0.0%	87.4k	26.50	15.33
DPTR	DELTA PETE CORP	9.11	+0.00	+0.0%	66.8k	28.37	7.61
UAUA	UAL CORP	7.70	+0.35	+4.8%	42.0k	51.60	2.80
DRYS	DRYSHIPS INC	21.30	+0.95	+4.7%	31.3k	131.34	15.80
CSIQ	CANADIAN SOLAR INC	11.13	+0.76	+7.3%	20.3k	51.80	8.67
SOLF	SOLARFUN POWER HOLDINGS CO L	6.76	+0.35	+5.5%	12.2k	40.19	4.67
JRCC	JAMES RIVER COAL CO	16.00	+1.06	+7.1%	10.5k	62.83	4.76
JASO	JA SOLAR HOLDINGS CO LTD	5.95	+0.27	+4.8%	4.0k	27.00	5.48
RMBS	RAMBUS INC DEL	8.10	+0.18	+2.3%	2.6k	26.41	7.10
DMLP	DORCHESTER MINERALS LP	20.50	-0.70	-3.3%	2.0k	36.49	16.11

---