Benzinga's Top Pre-Market Gainers

Extorre Gold Mines

surged 56.02% to $4.15 in the pre-market session. Extorre Gold Mines agreed to be bought by Yamana Gold

for C$4.26 per share in cash and stock. BroadVision

added 5.01% to $12.99 in the pre-market session. BroadVision shares have dropped 5.28% over the past 52 weeks, while the S&P 500 index has gained 5.61% in the same period. Arena Pharmaceuticals

moved up 5% to $8.82 in the pre-market session. Arena Pharmaceuticals had $88.19 million in total cash for the latest quarter. Groupon

soared 4.37% to $10.50 in the pre-market trading. Groupon's PEG ratio is 1.69.