Shares of HTG Molecular Diagnostics(HTGM) skyrocketed 83.64% to $3.93 per share as the company obtained permission to sale the company's lung cancer diagnosis test in EU. The stock gained additional 53.69% to $6.04 per share during after market. Another biotech winner was Flexion Therapeutics (FLXN) with shares surging 33.38% to $26.25 per share on take over rumor from Sanofi.

Infrastructure project management firm Versar Inc (VSR) saw it shares jumped 24.2% to $1.95 as the company was awarded $2.3 million contract from United States Army Corps of Engineers. The stock has gained almost 100% this week. Lastly material company Constellium(CSTM) gained 18.92% to $6.6 per share.