Cogent Communications Holdings, Inc. SEC filings CCOI
Cogent Communications Holdings, Inc. has 1,004 filings in SEC EDGAR's recent list, going back to May 9, 2018. Its latest annual report, Form ARS, was filed on Mar 20, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 5, 2026 | — |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Sep 15, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 3, 2026 | Sep 2, 2026 |
| 144 | Notice of proposed sale | Sep 2, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 17, 2026 | — |
| 4 | Insider transaction | Jun 16, 2026 | Jun 16, 2026 |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 4 | Insider transaction | Jun 15, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 9, 2026 | — |
| 4 | Insider transaction | May 28, 2026 | May 28, 2026 |
| 144 | Notice of proposed sale | May 28, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 22, 2026 | — |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 4 | Insider transaction | May 4, 2026 | May 4, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 31, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 9, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 5, 2026 |
| 144 | Notice of proposed sale | Mar 5, 2026 | — |
| 4 | Insider transaction | Mar 5, 2026 | Mar 5, 2026 |
| 144 | Notice of proposed sale | Mar 5, 2026 | — |
| 4 | Insider transaction | Mar 5, 2026 | Mar 5, 2026 |
| 144 | Notice of proposed sale | Mar 5, 2026 | — |
| 144 | Notice of proposed sale | Mar 5, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 23, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Dec 12, 2025 | Dec 11, 2025 |
| 144 | Notice of proposed sale | Dec 11, 2025 | — |
| 4 | Insider transaction | Dec 8, 2025 | Dec 8, 2025 |
| 144 | Notice of proposed sale | Dec 3, 2025 | — |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Dec 2, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Dec 1, 2025 |
| 144 | Notice of proposed sale | Dec 1, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 4 | Insider transaction | Oct 2, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 2, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 1, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Sep 5, 2025 | Sep 5, 2025 |
| 144 | Notice of proposed sale | Sep 4, 2025 | — |
| 4 | Insider transaction | Sep 3, 2025 | Sep 2, 2025 |
| 3 | Initial insider ownership | Sep 3, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 2, 2025 |
| 144 | Notice of proposed sale | Sep 2, 2025 | — |
| 4 | Insider transaction | Aug 21, 2025 | Aug 21, 2025 |
| 144 | Notice of proposed sale | Aug 21, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 11, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 18, 2025 | — |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 1, 2025 | Jun 30, 2025 |
| 144 | Notice of proposed sale | Jun 16, 2025 | — |
| 4 | Insider transaction | Jun 16, 2025 | Jun 16, 2025 |
| 144 | Notice of proposed sale | Jun 16, 2025 | — |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 144 | Notice of proposed sale | Jun 13, 2025 | — |
| 144 | Notice of proposed sale | Jun 13, 2025 | — |
| 144 | Notice of proposed sale | Jun 12, 2025 | — |
| 4 | Insider transaction | Jun 12, 2025 | Jun 12, 2025 |
| 144 | Notice of proposed sale | Jun 12, 2025 | — |
| 4 | Insider transaction | Jun 12, 2025 | Jun 11, 2025 |
| 144 | Notice of proposed sale | Jun 11, 2025 | — |
| 144 | Notice of proposed sale | Jun 11, 2025 | — |
| 4 | Insider transaction | Jun 10, 2025 | Jun 10, 2025 |
| 144 | Notice of proposed sale | Jun 10, 2025 | — |
| 144 | Notice of proposed sale | Jun 10, 2025 | — |
| 4 | Insider transaction | Jun 9, 2025 | Jun 9, 2025 |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| 4 | Insider transaction | Jun 9, 2025 | Jun 9, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 6, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 6, 2025 |
| 4/A | Filing | Jun 9, 2025 | Dec 1, 2024 |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 144 | Notice of proposed sale | Jun 6, 2025 | — |
| 144 | Notice of proposed sale | Jun 6, 2025 | — |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 5, 2025 | Jun 4, 2025 |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 4 | Insider transaction | Jun 4, 2025 | Jun 3, 2025 |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 144 | Notice of proposed sale | Jun 3, 2025 | — |
| 144 | Notice of proposed sale | Jun 3, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| 144 | Notice of proposed sale | Jun 3, 2025 | — |
| 144 | Notice of proposed sale | Jun 2, 2025 | — |
| 144 | Notice of proposed sale | Jun 2, 2025 | — |
| 4 | Insider transaction | Jun 2, 2025 | May 30, 2025 |
| 144 | Notice of proposed sale | May 30, 2025 | — |
| 4 | Insider transaction | May 30, 2025 | May 29, 2025 |
| 144 | Notice of proposed sale | May 29, 2025 | — |
| 4 | Insider transaction | May 29, 2025 | May 28, 2025 |
| 4 | Insider transaction | May 29, 2025 | May 28, 2025 |
| 4 | Insider transaction | May 29, 2025 | May 28, 2025 |
| 144 | Notice of proposed sale | May 28, 2025 | — |
| 4 | Insider transaction | May 28, 2025 | May 27, 2025 |
| 144 | Notice of proposed sale | May 28, 2025 | — |
| 144 | Notice of proposed sale | May 27, 2025 | — |
| 4 | Insider transaction | May 27, 2025 | May 23, 2025 |
| 144 | Notice of proposed sale | May 23, 2025 | — |
| 4 | Insider transaction | May 23, 2025 | May 22, 2025 |
| 144 | Notice of proposed sale | May 22, 2025 | — |
| 4 | Insider transaction | May 22, 2025 | May 21, 2025 |
| 144 | Notice of proposed sale | May 21, 2025 | — |
| 4 | Insider transaction | May 21, 2025 | May 20, 2025 |
| 144 | Notice of proposed sale | May 20, 2025 | — |
| 4 | Insider transaction | May 19, 2025 | May 16, 2025 |
| 4/A | Filing | May 19, 2025 | May 16, 2025 |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 4 | Insider transaction | May 16, 2025 | May 16, 2025 |
| 144 | Notice of proposed sale | May 16, 2025 | — |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 144 | Notice of proposed sale | May 15, 2025 | — |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 144 | Notice of proposed sale | May 14, 2025 | — |
| 4 | Insider transaction | May 13, 2025 | May 13, 2025 |
| 144 | Notice of proposed sale | May 13, 2025 | — |
| 144 | Notice of proposed sale | May 12, 2025 | — |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 4, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 31, 2025 | Mar 31, 2025 |
| 144 | Notice of proposed sale | Mar 14, 2025 | — |
| 4 | Insider transaction | Mar 13, 2025 | Mar 12, 2025 |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 144 | Notice of proposed sale | Mar 11, 2025 | — |
| 4 | Insider transaction | Mar 10, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 4, 2025 |
| 144 | Notice of proposed sale | Mar 4, 2025 | — |
| 144 | Notice of proposed sale | Mar 4, 2025 | — |
| 144 | Notice of proposed sale | Mar 4, 2025 | — |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| 4 | Insider transaction | Mar 3, 2025 | Mar 3, 2025 |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Communications Services, NEC (SIC 4899)
- Listed as
- CCOI (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Washington, DC
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1158324
- Former names
- COGENT COMMUNICATIONS GROUP INC (until Jun 26, 2014)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.