COGENT COMMUNICATIONS HOLDINGS, INC. — All Filings
1,000 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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144
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SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-000967 | Mar 26, 2026 | — |
| ARS | ARS | 0001104659-26-032752 | Mar 20, 2026 | Dec 31, 2025 |
| DEF 14A | DEF 14A | 0001104659-26-032744 | Mar 20, 2026 | May 1, 2026 |
| 4 | — | 0001599812-26-000004 | Mar 9, 2026 | Mar 6, 2026 |
| 4 | — | 0001395643-26-000007 | Mar 5, 2026 | — |
| 144 | — | 0001395643-26-000006 | Mar 5, 2026 | — |
| 4 | — | 0001790695-26-000007 | Mar 5, 2026 | — |
| 144 | — | 0001950047-26-002272 | Mar 5, 2026 | — |
| 4 | — | 0001166978-26-000005 | Mar 5, 2026 | — |
| 144 | — | 0001790695-26-000006 | Mar 5, 2026 | — |
| 144 | — | 0001949846-26-000146 | Mar 5, 2026 | — |
| 10-K | 10-K | 0001104659-26-017968 | Feb 20, 2026 | Dec 31, 2025 |
| 8-K | FORM 8-K | 0001104659-26-017862 | Feb 20, 2026 | — |
| SCHEDULE 13G/A | — | 0000905148-26-000888 | Feb 17, 2026 | — |
| SCHEDULE 13G/A | — | 0002012383-26-000838 | Jan 23, 2026 | — |
| 8-K | FORM 8-K | 0001104659-26-001748 | Jan 7, 2026 | Dec 31, 2025 |
| 4 | — | 0001166976-26-000007 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001456823-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001790695-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001923830-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001933694-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001395643-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001901420-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001227882-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001166978-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001599812-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0002083050-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001775672-26-000003 | Jan 5, 2026 | Dec 31, 2025 |
| 4 | — | 0001166978-25-000007 | Dec 12, 2025 | Dec 11, 2025 |
| 144 | — | 0001950047-25-010136 | Dec 11, 2025 | — |
| 4 | — | 0001599812-25-000007 | Dec 8, 2025 | — |
| 144 | — | 0001949846-25-000657 | Dec 3, 2025 | — |
| 4 | — | 0001166978-25-000005 | Dec 3, 2025 | Dec 1, 2025 |
| 4 | — | 0001395643-25-000009 | Dec 2, 2025 | — |
| 4 | — | 0001775672-25-000005 | Dec 2, 2025 | Dec 1, 2025 |
| 4 | — | 0001599812-25-000005 | Dec 2, 2025 | Dec 1, 2025 |
| 144 | — | 0001395643-25-000007 | Dec 1, 2025 | — |
| 8-K | FORM 8-K | 0001104659-25-113284 | Nov 17, 2025 | — |
| SCHEDULE 13G/A | — | 0000905148-25-004056 | Nov 14, 2025 | — |
| 4 | — | 0001790695-25-000009 | Nov 12, 2025 | Nov 11, 2025 |
| 144 | — | 0001790695-25-000007 | Nov 12, 2025 | — |
| 10-Q | 10-Q | 0001104659-25-107544 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | FORM 8-K | 0001104659-25-107367 | Nov 6, 2025 | — |
| 4 | — | 0001395643-25-000005 | Oct 2, 2025 | Sep 30, 2025 |
| 4 | — | 0001901420-25-000005 | Oct 2, 2025 | Sep 30, 2025 |
| 4 | — | 0001923830-25-000005 | Oct 1, 2025 | Sep 30, 2025 |
| 4 | — | 0001227882-25-000005 | Oct 1, 2025 | Sep 30, 2025 |
| 4 | — | 0001933694-25-000005 | Oct 1, 2025 | Sep 30, 2025 |
| 4 | — | 0001790695-25-000005 | Oct 1, 2025 | Sep 30, 2025 |
| 4 | — | 0001456823-25-000004 | Oct 1, 2025 | Sep 30, 2025 |