Canadian Solar Inc. (Nasdaq:CSIQ), EnerNOC Inc. (Nasdaq:ENOC) and Orthovita Inc. (Nasdaq:VITA) are among the most actively traded companies in Thursday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Columbia Banking System Inc. (Nasdaq:COLB), Novavax Inc. (Nasdaq:NVAX), CardioNet Inc. (Nasdaq:BEAT), JA Solar Holdings Co Ltd. (Nasdaq:JASO), UAL Corp. (Nasdaq:UAUA) and Sequenom Inc. (Nasdaq:SQNM).

Here are the most actively traded companies among small caps:

		Price at 9:08 ET	Change	% Change	Volume	Year High	Year Low
CSIQ	CANADIAN SOLAR INC	18.74	+2.62	+16.3%	352.7k	33.24	3.00
ENOC	ENERNOC INC	27.48	-0.77	-2.7%	206.3k	31.16	4.80
VITA	ORTHOVITA INC	5.15	-1.45	-22.0%	156.1k	6.91	1.49
COLB	COLUMBIA BKG SYS INC	13.50	+0.51	+3.9%	148.4k	29.00	4.76
NVAX	NOVAVAX INC	5.18	+0.02	+0.4%	114.6k	5.59	0.52
BEAT	CARDIONET INC	7.93	+0.46	+6.2%	97.5k	35.89	5.60
JASO	JA SOLAR HOLDINGS CO LTD	5.25	+0.18	+3.6%	91.1k	18.48	1.55
UAUA	UAL CORP	6.05	+0.13	+2.2%	90.4k	16.73	3.00
SQNM	SEQUENOM INC	6.33	+0.13	+2.1%	87.3k	29.14	2.86
FUQI	FUQI INTERNATIONAL INC	27.64	+3.24	+13.3%	66.5k	25.60	3.31