Calgon Carbon Corp. (Nasdaq:CCC), Silicon Graphics Inc. (Nasdaq:SGIC) and Oneida Financial Corp. (Nasdaq:ONFC) are among the biggest percentage losers in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Rubicon Technology Inc. (Nasdaq:RBCN), Union Bankshares Inc. (Nasdaq:UNB), Medicines Co. (Nasdaq:MDCO), Phoenix Co Inc. (Nasdaq:PNX), Medicines Co. (Nasdaq:MDCO) and HealthSouth Corp. (Nasdaq:HLS).

Here are the biggest percentage losers among small caps:

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