13 insiders reported 123 Form 4 transactions for COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) over the past 18 months (most recent 2026-09-15). Recent activity: KILMER HENRY W (VP OF NETWORK STRATEGY) Sell 2,400 shares, WEED THADDEUS GERARD (VICE PRESIDENT, CFO) Sell 4,850 shares, BROOKS STEVEN D (Director) Buy 3,445 shares, de Sa Paul (Director) Buy 3,445 shares, Howell Deneen C (Director) Buy 3,445 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-15 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2,400 | $22,104 |
| 2026-09-03 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 4,850 | $45,445 |
| 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 | Kennedy Sheryl Lynn | Director | Buy | 3,445 | $0 |
| 2026-06-30 | Montagner Marc | Director | Buy | 3,445 | $0 |
| 2026-06-16 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 4,850 | $81,432 |
| 2026-06-15 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2,400 | $40,824 |
| 2026-05-28 | FERGUSON Lewis H | Director | Sell | 2,800 | $57,008 |
| 2026-05-18 | Kennedy Sheryl Lynn | Director | Sell | 3,300 | $53,526 |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Buy | 1.0M | $0 |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 1.0M | $0 |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Buy | 1.0M | $0 |
| 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 |
来源：SEC Form 4 申报文件 · 截至 2026-09-15