Ameristar Casinos Inc. (Nasdaq:ASCA), Seanergy Maritime Units (Nasdaq:SRG.U) and PeopleSupport Inc. (Nasdaq:PSPT) are among the biggest percentage losers in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Trina Solar Ltd. (Nasdaq:TSL), SL Industries Inc. (Nasdaq:SLI), SuccessFactors Inc. (Nasdaq:SFSF), UAL Corp (Nasdaq:UAUA), YRC Worldwide Inc. (Nasdaq:YRCW) and Dendreon Corp. (Nasdaq:DNDN).

Here are the biggest percentage losers among small caps:

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