Another former SAC Capital Advisors analyst was charged with insider trading, the ninth former or current employee of the giant investment firm to be ensnared by a years-long investigation into its practices.

Ronald Dennis, 44 years old, allegedly helped SAC and its affiliates earn $3.8 million in profits and avoided losses in trading the shares of Dell Inc. and Foundry Networks Inc., according to a complaint filed Thursday by the Securities and Exchange Commission.