Synchronoss Technologies Inc (Nasdaq:SNCR), Rubicon Technology Inc (Nasdaq:RBCN) and United Online Inc (Nasdaq:UNTD) are among the most actively traded companies in Wednesday's trading among companies with market capitalizations under $750 million.

Vanda Pharmaceuticals Inc (Nasdaq:VNDA), Vasco Data Security International Inc (Nasdaq:VDSI) and Gulfport Energy Corp (Nasdaq:GPOR) are also among the most actively traded companies.

Here are the most actively traded companies among small caps:

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