Benzinga's Top Pre-Market Gainers

Kythera Biopharmaceuticals

shares jumped 28.69% to $43.15 in pre-market trading after the company reported positive ATX-101 top line phase III trial results for the reduction of submental fat. Huntsman

surged 8.05% to $20.68 in the pre-market session after the company announced its plans to buy Rockwood Holdings'

Performance Additives and Titanium Dioxide businesses for $1.1 billion in cash. BioCryst Pharmaceuticals

shares gained 5.98% to $6.91 in the pre-market session after the company has been awarded contract by the National Institute of Allergy and Infectious Diseases to develop BCX4430 for the treatment of Marburg virus disease. Discover Financial Services

soared 4.92% to $54.43 in the pre-market trading. Discover Financial's PEG ratio is 1.26.