 James Bubeck, Chief Revenue Officer at Cogent Comms Hldgs NASDAQ:CCOI, made an insider sell on September 1, according to a new SEC filing. What Happened: A Form 4 filing from the U.S. Securities and Exchange Commission on Wednesday showed that Bubeck sold 1,920 shares of Cogent Comms Hldgs at a price of 73.64 per share. 