Pegasystems ( PEGA): Shares of software maker have risen 21% since it was profiled on May 20. Pegasystems stock has more than doubled this year. Stifel Financial ( SF): The investment bank's shares have climbed 20% since it was profiled on June 1. The company's shares have gained 50% this year. Peet's Coffee & Tea ( PEET): Shares of the coffee shop chain have increased 14% since it was profiled on Oct. 21. Peet's is vying with Green Mountain Coffee Roasters ( GMCR) to buy Diedrich Coffee. -- Compiled by Danielle Kost in Boston.