Cogent Communications Holdings, Inc. (CCOI) Investors: September 21, 2026, Deadline in Securities Fraud Class Action Lawsuit – Contact Kessler Topaz Meltzer & Check, LLP businesswire.com July 28, 2026 at 11:58 AM ET CCOI The article discusses a securities fraud class action lawsuit against Cogent Communications Holdings, Inc., with a deadline for investors to participate. This indicates potential negative news and legal issues for the company.