Pre-market: TomoTherapy, SiRF Technology Holdings and Overstock.com lead small-cap volume
TomoTherapy Inc. (Nasdaq:TOMO), SiRF Technology Holdings Inc. (Nasdaq:SIRF) and Overstock.com, Inc. (Nasdaq:OSTK) are among the most actively traded companies in Friday's pre-market trading among those with market capitalizations under $750 million.
Sigma Designs, Inc. (Nasdaq:SIGM), China Sunergy Co., Ltd. (Nasdaq:CSUN) and Akeena Solar, Inc. (Nasdaq:AKNS) are also among the most actively traded small-cap companies in pre-market trading.
Here are the most actively traded small-cap companies in Friday's pre-market trading:
| Price at 9:20 ET | Change | % Change | Volume | Year High | Year Low |


















