Friday's pre-market gainers and losers

Here are the biggest percentage gainers and losers in pre-market trading among companies with a market cap between $100 million and $750 million:


• iGATE Corp. (Nasdaq:IGTE), up 11% on news of a rise in fourth-quarter revenue.
• Ceragon Networks Ltd. (Nasdaq:CRNT), up 8% on news that first-quarter earnings met analysts’ projections.
• SiRF Technology Holdings, Inc. (Nasdaq:SIRF), up 5%


• Chemotherapy Inc. (Nasdaq:TOMO), down 32% on news it expects a first-quarter loss.
• China GrenTech Corp. (Nasdaq:GRRF), down 14% on news of a decline in fourth-quarter earnings.
• comScore Inc. (Nasdaq:SCOR), down 5%.

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