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COGENT COMMUNICATIONS HOLDINGS, INC.

For the period ended Sep 30, 2026. Filed Nov 5, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 5, 2026

CCOI$4.45+11.8%Stored close · as of Nov 9, 2026

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Item 5. Other Information

On September 16, 2026, John Chang, the Company’s Vice President and Chief Legal Officer, adopted a 10b5-1 trading plan for the sale of the Company’s common stock (a “Rule 10b5-1 Trading Plan”) that is intended to satisfy the affirmative defense conditions of the Securities Exchange Act Rule 10b5-1(c). Mr. Chang’s Rule 10b5-1 Trading Plan provides for the sale of up to 65,645 shares pursuant to the terms of the plan subject to certain conditions. This trading plan is effective through December 31, 2027.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.