7/28 Top Gainers After Hours: ~~~~~~~~~~~~~~ CGNX Cognex Corp. 43.75 15.74% TKMR Tekmira Pharmaceut... 11.65 15.00% ARWR Arrowhead Research... 12.18 13.62% TRX Tanzanian Royalty ... 2.60 13.54% SBLK Star Bulk Carriers... 11.91 9.97% SKYW Skywest Inc. 11.65 9.18% SIMO Silicon Motion Tec... 24.99 9.13% HLS Healthsouth Corp. ... 41.00 8.93% QUIK Quicklogic Corpora... 4.25 8.70% ZINC Horsehead Hldg Cor... 21.00 7.97% IDTI Integrated Device ... 14.60 7.91% ISRL Isramco Inc. 129.90 7.00% NMR Nomura Holdings In... 6.99 6.88% AMKR Amkor Technology I... 10.45 6.63% NEPT Neptune Technologi... 2.40 6.19% ZIOP Ziopharm Oncology ... 3.28 6.15% THST Truett-hurst Inc. ... 5.75 5.70% ECYT Endocyte Inc. 6.30 5.70% GNMK Genmark Diagnostic... 11.15 5.59% CEO Cnooc Ltd. Ads 190.92 5.21% Read more at http://thestockmarketwatch.com/markets/after-hours/trading.aspx#oVopTRjEodJcELmG.99