James Geiger, chairman and chief executive officer of Cbeyond, sold 190,000 shares of Cbeyond stock on Aug. 9 as part of a diversification plan.
The shares represent some 15 percent of his holdings in shares and options.
Cbeyond (Nasdaq: CBEY) shares closed Friday at $36.40.
Cbeyond offers a variety of Internet Protocol-based communications services.
