Benzinga's Top #PreMarket Gainers

Amyris

shares jumped 16.13% to $4.68 in pre-market trading after the company and BASF reached an agreement for strain engineering collaboration. Plug Power

shares gained 4.95% to $7.85 in the pre-market after the company reported that it has acquired fuel-cell stack maker ReliOn for around $4 million in stock. Ctrip.com International

surged 4.93% to $54.74 in pre-market trading after the company announced up to $600 million share repurchase program. MannKind

shares gained 3.86% to $7.26 in the pre-market trading session after climbing 73.88% on Wednesday.