First California Financial Group Inc. (Nasdaq:FCAL), Wright Express Corp. (Nasdaq:WXS) and Molecular Insight Pharmaceuticals Inc. (Nasdaq:MIPI) are among the biggest percentage losers in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Alyst Acquisition Corp. (Nasdaq:AYA), Summit Financial Group Inc. (Nasdaq:SMMF), Warwick Valley Telephone Co. (Nasdaq:WWVY), W Holding Co Inc. (Nasdaq:WHI), Harmonic Inc. (Nasdaq:HLIT) and Bancorp Bank (Nasdaq:TBBK).

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