Benzinga's Top #PreMarket Gainers

Affymetrix, Inc. AFFX shares rose 48.53 percent to $13.68 in pre-market trading as Thermo Fisher Scientific Inc. TMO agreed to acquire Affymetrix for $1.3 billion in cash. Synergy Pharmaceuticals Inc SGYP shares rose 12.32 percent to $4.65 in pre-market trading after the company reported positive trial update with dolcanatide in patients with ulcerative colitis. Apollo Education Group Inc APOL shares rose 10.02 percent to $7.25 in pre-market trading. Apollo Education reported a Q1 loss of $0.53 per share and announced that it is exploring strategic alternatives. Baxalta Inc BXLT shares rose 6.35 percent to $42.55 after the company agreed to be acquired by Shire PLC (ADR) SHPG for $32 billion. Tower Semiconductor Ltd. (USA) TSEM shares rose 4.29 percent to $13.12 in pre-market trading after slipping 1.49 percent on Friday.