A securities class action lawsuit is filed against Cogent Communications Holdings, Inc. (NASDAQ: CCOI) on behalf of investors who purchased or acquired the company’s securities during the period from February 29, 2024 to May 1, 2026. Multiple law firms publicize the filing and issue investor notices tied to an upcoming deadline.

Both outlets state that investors in the specified class period are being reminded to take action by September 21, 2026. The notices focus on eligibility to lead the lawsuit and the process for investors to participate or respond. While the outlets share the same core information—case status, covered trading dates, and the key deadline—they primarily differ in which law firm is speaking and the phrasing used to encourage investors to get involved.

Overall, the announcements serve as procedural reminders connected to the newly filed class action, rather than providing detailed allegations in the materials summarized here.