Solarfun Power Holdings Co., Ltd. (Nasdaq: SOLF), Canadian Solar Inc. (Nasdaq: CSIQ) and Ascent Solar Technologies, Inc. (Nasdaq: ASTI) are among the most actively traded companies in Thursday's pre-market trading among those with market capitalizations under $750 million.

Rick's Cabaret Int'l, Inc. (Nasdaq: RICK), Origin Agritech Ltd. (Nasdaq: SEED) and Premier Exhibitions, Inc. (Nasdaq: PRXI) are also among the most actively traded small-cap companies in pre-market trading.

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

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