Solarfun Power Holdings Co., Ltd. (Nasdaq:SOLF), Super Micro Computer, Inc. (Nasdaq:SMCI) and Silicon Motion Technology Corp. (Nasdaq:SIMO) are among the most actively traded companies in Wednesday's pre-market trading among those with market capitalizations under $750 million.

Salary.com, Inc. (Nasdaq:SLRY), Align Technology, Inc. (Nasdaq:ALGN) and DemandTec, Inc. (Nasdaq:DMAN) are also among the most actively traded small-cap companies in pre-market trading.

Here are the most actively traded small-cap companies in Wednesday's pre-market trading:

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