Benzinga's Top #PreMarket Gainers

Questcor Pharmaceuticals

shares gained 31.87% to $89.50 in the pre-market after the company agreed to be bought by Mallinckrodt for $86.10 per share. Agios Pharmaceuticals

shares jumped 26.83% to $45.00 in pre-market trading after the company announced initial Phase 1 AG-221 data presented at AACR 2014. JP Morgan upgraded the stock from Neutral to Overweight and raised the price target from $40.00 to $55.00. UBIC

surged 17% to $8.26 in pre-market trading after gaining 11.01% on Friday. Zynga

shares gained 1.90% to $4.28 in the pre-market trading session as Wedbush added the stock to 'Best Ideas' list.