Cogent Communications Holdings, Inc. faces a securities fraud class action on behalf of investors who purchased or acquired its common stock between February 29, 2024 and May 1, 2026. The case, filed in the United States District Court for the District of Columbia as Southfield Fire and Police Retirement System v. Cogent Communications Holdings, Inc., No. 26-cv-02609 (D.D.C.), alleges the company and related defendants made materially false or misleading statements, or omitted material facts, about its optical wavelength services and the nature of its reported backlog of wavelength orders. The complaint says most of that purported backlog was unlikely to convert into paid orders, many customers were unable or unwilling to accept delivery even if Cogent could provision service on time, and those issues meant the company overstated demand, lacked a reasonable basis for its revenue and margin targets, could not sustain its long-standing dividend policy, and faced an undisclosed risk that Defendant David Schaeffer could be forced to sell large amounts of stock because of high-risk pledging activities. The release says the final stock decline tied to those allegations came on May 4, 2026, when Cogent disclosed further wavelength underperformance and customer acceptance delays, sending the shares down $6.79, or 29%, to close at $16.37. Investors seeking lead plaintiff status have until September 21, 2026, while other class members may remain absent class members and still share in any recovery.