Intersections Inc (Nasdaq:INTX), QC Holdings Inc (Nasdaq:QCCO) and Polypore International Inc (Nasdaq:PPO) are among the biggest percentage gainers in Wednesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: CPI International Inc (Nasdaq:CPII), Grey Wolf Inc (Nasdaq:GW), America's Car-Mart Inc (Nasdaq:CRMT), Vitran Corp Inc (Nasdaq:VTNC), Insulet Corp (Nasdaq:PODD) and Kimball International Inc (Nasdaq:KBALB).

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