Leading Thursday small-cap percentage gainers: 21st Century Holding Co., Protherics PLC, PROSHARES TR
21st Century Holding Co. (Nasdaq: TCHC), Protherics PLC (Nasdaq: PTIL) and PROSHARES TR (AMEX: SMN) are among the biggest percentage gainers in Thursday's trading among companies with market capitalizations under $500 million.
Here are today's biggest percentage gainers:
| Price at | % | ||||||
| 3:03 et | Change | Change | Volume | Year High | Year Low |


















