Cogent Communications Holdings, Inc. faces a proposed securities fraud class action over alleged misstatements and omissions concerning optical wavelength demand, its purported order backlog, revenue and margin prospects, dividend policy and stock-pledging risks. The proposed class covers investors who purchased or acquired CCOI common stock from February 29, 2024, through May 1, 2026. The case was filed in the United States District Court for the District of Columbia under the caption Southfield Fire and Police Retirement System v. Cogent Communications Holdings, Inc., No. 26-cv-02609 (D.D.C.). Kessler Topaz Meltzer & Check said investors have until September 21, 2026, to seek lead plaintiff status. The complaint alleges that most purported wavelength backlog orders were unlikely to become paid orders, that customers were unable or unwilling to accept delivery, and that Cogent therefore overstated demand and lacked a reasonable basis for its financial targets and dividend policy. It also alleges an undisclosed risk that David Schaeffer could be forced to sell large quantities of pledged Cogent stock. Cogent’s shares fell $6.79, or 29%, to close at $16.37 on May 4, 2026, after the company disclosed further wavelength underperformance and customer acceptance delays. No class has been certified, and investors may retain counsel, remain absent class members or take no action without losing eligibility to share in any potential recovery. Rosen Law Firm and Hagens Berman have also publicized investor outreach or investigations.