NEW ORLEANS, Aug. 21, 2026 /PRNewswire/ -- ClaimsFiler, a FREE shareholder information service, reminds investors that they have until September 21, 2026 to file lead plaintiff applications in a securities class action lawsuit against Cogent Communications Holdings, Inc. (NasdaqGS: CCOI) ("Cogent" or the "Company"), if they purchased the Company's shares between February 29, 2024 and May 1, 2026, inclusive (the "Class Period"). This action is pending in the United States District Court for the District of Columbia.