COGENT COMMUNICATIONS HOLDINGS, INC. - CCOI
All tracked SEC files for this issuer. Showing up to 200 latest records.
Need parsed ownership details (13D/13G with shares/percent)?
Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).
Files summary
Total files loaded: 45
Latest filed: Jul 01, 2026
| Form | Count |
|---|---|
| 4 | 24 |
| 144 | 8 |
| 8-K | 7 |
| SCHEDULE 13G/A | 4 |
| SCHEDULE 13G | 2 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| Jul 01, 2026 | 4 | Jun 30, 2026 | 0001227882-26-000006 | View |
| Jul 01, 2026 | 4 | Jun 30, 2026 | 0001923830-26-000006 | View |
| Jul 01, 2026 | 4 | Jun 30, 2026 | 0001901420-26-000006 | View |
| Jul 01, 2026 | 4 | Jun 30, 2026 | 0001933694-26-000007 | View |
| Jun 30, 2026 | 4 | Jun 30, 2026 | 0001395643-26-000016 | View |
| Jun 30, 2026 | 4 | Jun 30, 2026 | 0001456823-26-000008 | View |
| Jun 30, 2026 | 4 | Jun 30, 2026 | 0001790695-26-000014 | View |
| Jun 29, 2026 | 8-K | Jun 29, 2026 | 0001104659-26-078858 | View |
| Jun 17, 2026 | SCHEDULE 13G/A | — | 0001493152-26-029083 | View |
| Jun 16, 2026 | 4 | Jun 16, 2026 | 0001166978-26-000007 | View |
| Jun 16, 2026 | 144 | — | 0001950047-26-006169 | View |
| Jun 15, 2026 | 8-K | Jun 15, 2026 | 0001104659-26-074046 | View |
| Jun 15, 2026 | 4 | Jun 15, 2026 | 0001599812-26-000006 | View |
| Jun 09, 2026 | 144 | — | 0001949846-26-000363 | View |
| May 28, 2026 | 144 | — | 0001395643-26-000012 | View |
| May 28, 2026 | 4 | May 28, 2026 | 0001395643-26-000014 | View |
| May 26, 2026 | 8-K | May 22, 2026 | 0001104659-26-066279 | View |
| May 22, 2026 | SCHEDULE 13G | — | 0001493152-26-025027 | View |
| May 18, 2026 | 144 | — | 0001790695-26-000010 | View |
| May 18, 2026 | 4 | May 14, 2026 | 0001790695-26-000012 | View |
| May 04, 2026 | 4 | May 04, 2026 | 0001166976-26-000011 | View |
| May 04, 2026 | 8-K | May 01, 2026 | 0001104659-26-054817 | View |
| May 04, 2026 | 8-K | May 04, 2026 | 0001104659-26-054436 | View |
| Apr 29, 2026 | SCHEDULE 13G | — | 0002100121-26-000232 | View |
| Apr 02, 2026 | 4 | Apr 01, 2026 | 0001166976-26-000009 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001227882-26-000004 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001901420-26-000004 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001395643-26-000009 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001456823-26-000006 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001933694-26-000005 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001923830-26-000004 | View |
| Mar 31, 2026 | 4 | Mar 31, 2026 | 0001790695-26-000008 | View |
| Mar 26, 2026 | SCHEDULE 13G/A | — | 0000102909-26-000967 | View |
| Mar 09, 2026 | 4 | Mar 06, 2026 | 0001599812-26-000004 | View |
| Mar 05, 2026 | 144 | — | 0001790695-26-000006 | View |
| Mar 05, 2026 | 4 | Mar 05, 2026 | 0001166978-26-000005 | View |
| Mar 05, 2026 | 144 | — | 0001950047-26-002272 | View |
| Mar 05, 2026 | 4 | Mar 05, 2026 | 0001790695-26-000007 | View |
| Mar 05, 2026 | 144 | — | 0001395643-26-000006 | View |
| Mar 05, 2026 | 4 | Mar 05, 2026 | 0001395643-26-000007 | View |
| Mar 05, 2026 | 144 | — | 0001949846-26-000146 | View |
| Feb 20, 2026 | 8-K | Feb 20, 2026 | 0001104659-26-017862 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | — | 0000905148-26-000888 | View |
| Jan 23, 2026 | SCHEDULE 13G/A | — | 0002012383-26-000838 | View |
| Jan 07, 2026 | 8-K | Dec 31, 2025 | 0001104659-26-001748 | View |