14 insiders reported 136 Form 4 transactions for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) over the past 18 months (most recent 2026-07-01). Recent activity: BROOKS STEVEN D (Director) Buy 3,445 shares, de Sa Paul (Director) Buy 3,445 shares, Howell Deneen C (Director) Buy 3,445 shares, Howard Eve N (Director) Buy 3,445 shares, FERGUSON Lewis H (Director) Buy 3,445 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-01 | BROOKS STEVEN D | Director | Buy | 3,445 | $0 |
| 2026-07-01 | de Sa Paul | Director | Buy | 3,445 | $0 |
| 2026-07-01 | Howell Deneen C | Director | Buy | 3,445 | $0 |
| 2026-07-01 | Howard Eve N | Director | Buy | 3,445 | $0 |
| 2026-06-30 | FERGUSON Lewis H | Director | Buy | 3,445 | $0 |
| 2026-06-30 | Montagner Marc | Director | Buy | 3,445 | $0 |
| 2026-06-30 | Kennedy Sheryl Lynn | Director | Buy | 3,445 | $0 |
| 2026-06-16 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 4,850 | $81,434 |
| 2026-05-18 | Kennedy Sheryl Lynn | Director | Sell | 3,300 | $53,518 |
| 2026-04-02 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 58,667 | $0 |
| 2026-04-02 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 29,333 | $0 |
| 2026-04-02 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Buy | 29,333 | $0 |
| 2026-03-31 | Howell Deneen C | Director | Buy | 3,445 | $0 |
| 2026-03-31 | Montagner Marc | Director | Buy | 3,445 | $0 |
| 2026-03-31 | BROOKS STEVEN D | Director | Buy | 3,445 | $0 |
| 2026-03-31 | FERGUSON Lewis H | Director | Buy | 3,445 | $0 |
| 2026-03-31 | Kennedy Sheryl Lynn | Director | Buy | 3,445 | $0 |
| 2026-03-31 | Howard Eve N | Director | Buy | 3,445 | $0 |
| 2026-03-31 | de Sa Paul | Director | Buy | 3,445 | $0 |
| 2026-03-09 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2,400 | $56,040 |
| 2026-03-05 | FERGUSON Lewis H | Director | Sell | 2,206 | $50,804 |
| 2026-03-05 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 4,850 | $109,756 |
| 2026-03-05 | Kennedy Sheryl Lynn | Director | Sell | 3,300 | $75,867 |
| 2026-01-05 | Kennedy Sheryl Lynn | Director | Buy | 3,388 | $0 |
| 2026-01-05 | Howard Eve N | Director | Buy | 3,388 | $0 |
Source: SEC Form 4 filings · as of 2026-07-01