California First National Bancorp (Nasdaq:CFNB), Gibraltar Industries Inc (Nasdaq:ROCK) and Horizon Financial Corp (Wash) (Nasdaq:HRZB) are among the biggest percentage gainers in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Palm Harbor Homes Inc (Nasdaq:PHHM), Orbitz Worldwide Inc (Nasdaq:OWW), Southwest Bancorp Inc (Nasdaq:OKSB), Horizon Bancorp (Indiana) (Nasdaq:HBNC), Peoples Bancorp of North Carolina Inc (Nasdaq:PEBK) and Firstbank Corp (Alma, Michigan) (Nasdaq:FBMI).

Here are the biggest percentage gainers among small caps:

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