Ameron International Corp. (Nasdaq:AMN), CRA International Inc. (Nasdaq:CRAI) and California First National Bancorp (Nasdaq:CFNB) are among the biggest percentage losers in Thursday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Chemgenex Pharm Depository Receipt (Nasdaq:CXSP), H&E Equipment Services Inc. (Nasdaq:HEES), C&F  Financial Corp. (Nasdaq:CFFI), LSB Corp. (Nasdaq:LSBX), AZZ Inc. (Nasdaq:AZZ) and Tortoise Energy Infrastructure Corp. (Nasdaq:TYG).

Here are the biggest percentage losers among small caps:

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