CCOI - CIK 0001158324
COGENT COMMUNICATIONS HOLDINGS, INC. has filed 2,511 documents with the SEC between 2001 and 2026. The most frequent type is insider trade (1,647 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Major company event | 8-K | 2005-06-17 | 2005-06-17 |
| 424B4 | - | 2005-06-08 | - |
| S-1/A | - | 2005-06-06 | - |
| S-1/A | - | 2005-05-20 | - |
| S-1/A | - | 2005-05-09 | - |
| Quarterly report | 10-Q | 2005-05-06 | 2005-03-31 |
| DEF 14C | - | 2005-04-29 | 2005-06-16 |
| Activist ownership stake (update) | SC 13D/A | 2005-04-14 | - |
| S-1/A | - | 2005-04-07 | - |
| Annual report | 10-K | 2005-03-31 | 2004-12-31 |
| Activist ownership stake (update) | SC 13D/A | 2005-03-16 | - |
| Major company event | 8-K | 2005-03-14 | 2005-03-09 |
| DEF 14C | - | 2005-03-01 | 2005-03-02 |
| Major company event | 8-K | 2005-02-28 | 2005-02-24 |
| Activist ownership stake (update) | SC 13D/A | 2005-02-23 | - |
| PRE 14C | - | 2005-02-18 | 2005-03-21 |
| Insider trade | 4 | 2005-02-18 | 2005-02-15 |
| Activist ownership stake | SC 13D | 2005-02-17 | - |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2003-07-31 |
| New insider ownership | 3 | 2005-02-17 | 2002-02-04 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-17 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-14 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Insider trade | 4 | 2005-02-16 | 2005-02-15 |
| Major company event | 8-K | 2005-02-15 | 2005-02-09 |
| IPO registration | S-1 | 2005-02-14 | - |
| Major company event | 8-K | 2005-02-01 | 2005-01-31 |
| DEF 14C | - | 2004-12-23 | 2004-12-23 |
| Activist ownership stake (update) | SC 13D/A | 2004-12-17 | - |
| PRE 14C | - | 2004-12-14 | 2004-12-23 |
| Insider trade | 4 | 2004-12-10 | 2004-10-26 |
| Insider trade | 4 | 2004-12-06 | 2004-10-26 |
| Major company event | 8-K | 2004-12-03 | 2004-12-01 |
| Insider trade | 4 | 2004-12-02 | 2004-10-26 |
| Insider trade | 4 | 2004-12-02 | 2004-10-26 |
| Quarterly report | 10-Q | 2004-11-15 | 2004-09-30 |
| Insider trade | 4 | 2004-11-10 | 2004-10-26 |
| Passive ownership stake | SC 13G | 2004-11-08 | - |