Rackspace Hosting Inc. (Nasdaq:RAX), Savannah Bancorp Inc. (Nasdaq:SAVB) and Federal Mogul Corp. (Nasdaq:FDML) are among the biggest percentage gainers in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: CryptoLogic Ltd. (Nasdaq:CRYP), Emergent BioSolutions Inc. (Nasdaq:EBS), hhgregg Inc. (Nasdaq:HGG), Perfect World Co Ltd. (Nasdaq:PWRD), Oppenheimer Holdings Inc. (Nasdaq:OPY) and Medallion Financial Corp. (Nasdaq:TAXI).

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