Company: Questcor [1]
Starting stock price: $1.45
Ending stock price: $5.77
Percent Change: 298%

Details: Union City, CA-based Questcor Pharmaceuticals develops and commercializes novel CNS-focused therapeutics. With 70 workers and a market cap of $366 million, the company's stock increased an impressive 298% in 2007. It's marketed products include Doral for insomnia and H.P. Acthar Gel.