Updated Jul 16, 2026 · Last SEC filing 2026-07-01
COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) has filed 12 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 5 Form 8-K material event filings were reported by CCOI in the last 90 days. 4 Form 144 notices of proposed sale were filed for CCOI stock. InsiderAlpha tracks every CCOI SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Communications Services, NEC (SIC 4899) |
|---|---|
| SEC CIK | 0001158324 |
| Form 4 filings (90d) | 12 |
|---|---|
| Form 8-K filings (90d) | 5 |
| Form 144 notices (90d) | 4 |
| Latest Form 4 filing | 2026-07-01 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Montagner Marc | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| Howell Deneen C | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| FERGUSON Lewis H | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| Kennedy Sheryl Lynn | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| de Sa Paul | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| BROOKS STEVEN D | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| Howard Eve N | Insider | A — Grant or award | 3.4K | $0.00 | — | SEC | |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | S — Open-market sale | 4.8K | $16.79 | $81K | SEC | |
| KILMER HENRY W | VP OF NETWORK STRATEGY | S — Open-market sale | 2.4K | $17.01 | $41K | SEC | |
| FERGUSON Lewis H | Insider | S — Open-market sale | 2.8K | $20.36 | $57K | SEC | |
| Kennedy Sheryl Lynn | Insider | S — Open-market sale | 3.3K | $16.22 | $54K | SEC | |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | G — Bona-fide gift | 1.00M | $0.00 | — | SEC | |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | G — Bona-fide gift | 1.00M | $0.00 | — | SEC | |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | A — Grant or award | 1.00M | $0.00 | — | SEC | |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | G — Bona-fide gift | 29.3K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| SCHAEFFER DAVE | 3 | — |
| Kennedy Sheryl Lynn | 2 | $54K |
| FERGUSON Lewis H | 2 | $57K |
| Howard Eve N | 1 | — |
| de Sa Paul | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CCOI insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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