San Diego, California--(Newsfile Corp. - December 29, 2025) - Robbins Geller Rudman & Dowd LLP is investigating potential violations of U.S. federal securities laws involving Cogent Communications Holdings, Inc. (NASDAQ: CCOI) focused on whether Cogent Communications and certain of its executives made false and/or misleading statements and/or failed to disclose material information to investors.If you have information that could assist in the Cogent Communications investigation or if you are a Cogent Commu ...