John D. McClenahan, director of manager research at Ennis, Knupp, left Friday to join an East Coast-based Internet company, said Ennis Knupp spokeswoman Deirdre Halloran.
She did not identify which company Mr. McClenahan joined, and he could not be reached for comment.
Ms. Halloran said officials at Ennis Knupp are discussing possibilities for Mr. McClenahans replacement.