Data Domain Inc. (Nasdaq:DDUP), Key Technology Inc. (Nasdaq:KTEC) and Lindsay Corp. (Nasdaq:LNN) are among the biggest percentage losers in Friday's trading among companies with market capitalizations under $1 billion.

Also included among the results: BreitBurn Energy Partners L P (Nasdaq:BBEP), DryShips Inc. (Nasdaq:DRYS), AMCOL International Corp. (Nasdaq:ACO), Zion Oil and Gas Inc. (Nasdaq:ZN), Infinera Corp. (Nasdaq:INFN) and Heritage Commerce Corp (Nasdaq:HTBK).

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