SEC Form 4 · Updated Daily
CCOI
— COGENT COMMUNICATIONS HOLDINGS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| SCHAEFFER DAVE | Director · Officer | 1,258,990 | 2026-05-04 | G |
| WEED THADDEUS GERARD | Officer | 193,050 | 2026-09-02 | S |
| Chang John B. | Officer | 188,847 | 2025-12-31 | A |
| Harris Mark Andrew | Officer | 110,168 | 2025-12-31 | A |
| Montagner Marc | Officer | 99,842 | 2026-06-30 | A |
| BROOKS STEVEN D | Director | 58,693 | 2026-06-30 | A |
| KILMER HENRY W | Officer | 38,600 | 2026-06-15 | S |
| de Sa Paul | Director | 33,792 | 2026-06-30 | A |
| Howell Deneen C | Director | 32,330 | 2026-06-30 | A |
| Howard Eve N | Director | 27,306 | 2026-06-30 | A |
| FERGUSON Lewis H | Director | 24,539 | 2026-06-30 | A |
| Kennedy Sheryl Lynn | Director | 13,690 | 2026-06-30 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-02 | WEED THADDEUS GERARD | Open-market sale | 4,850 | $9.37 | 193,050 |
| 2026-06-30 | Montagner Marc | Grant / award | 3,445 | $0.00 | 99,842 |
| 2026-06-30 | Kennedy Sheryl Lynn | Grant / award | 3,445 | $0.00 | 13,690 |
| 2026-06-30 | FERGUSON Lewis H | Grant / award | 3,445 | $0.00 | 24,539 |
| 2026-06-30 | Howard Eve N | Grant / award | 3,445 | $0.00 | 27,306 |
| 2026-06-30 | de Sa Paul | Grant / award | 3,445 | $0.00 | 33,792 |
| 2026-06-30 | BROOKS STEVEN D | Grant / award | 3,445 | $0.00 | 58,693 |
| 2026-06-30 | Howell Deneen C | Grant / award | 3,445 | $0.00 | 32,330 |
| 2026-06-16 | WEED THADDEUS GERARD | Open-market sale | 4,850 | $16.79 | 197,900 |
| 2026-06-15 | KILMER HENRY W | Open-market sale | 2,400 | $17.01 | 38,600 |
| 2026-05-28 | FERGUSON Lewis H | Open-market sale | 2,800 | $20.36 | 21,094 |
| 2026-05-14 | Kennedy Sheryl Lynn | Open-market sale | 3,300 | $16.22 | 10,245 |
| 2026-05-04 | SCHAEFFER DAVE | Gift | 1,000,000 | $0.00 | 1,258,990 |
| 2026-05-04 | SCHAEFFER DAVE | Gift | 1,000,000 | $0.00 | 609,143 |
| 2026-05-04 | SCHAEFFER DAVE | Grant / award | 1,000,000 | $0.00 | 1,609,143 |
| 2026-04-01 | SCHAEFFER DAVE | Gift | 29,333 | $0.00 | 258,990 |
| 2026-04-01 | SCHAEFFER DAVE | Gift | 29,333 | $0.00 | 609,143 |
| 2026-04-01 | SCHAEFFER DAVE | Disposition to issuer | 58,667 | $0.00 | 638,476 |
| 2026-03-31 | BROOKS STEVEN D | Grant / award | 3,445 | $0.00 | 55,248 |
| 2026-03-31 | de Sa Paul | Grant / award | 3,445 | $0.00 | 30,347 |
| 2026-03-31 | FERGUSON Lewis H | Grant / award | 3,445 | $0.00 | 23,894 |
| 2026-03-31 | Howard Eve N | Grant / award | 3,445 | $0.00 | 23,861 |
| 2026-03-31 | Howell Deneen C | Grant / award | 3,445 | $0.00 | 28,885 |
| 2026-03-31 | Kennedy Sheryl Lynn | Grant / award | 3,445 | $0.00 | 13,545 |
| 2026-03-31 | Montagner Marc | Grant / award | 3,445 | $0.00 | 96,397 |
| 2026-03-06 | KILMER HENRY W | Open-market sale | 2,400 | $23.35 | 41,000 |
| 2026-03-05 | WEED THADDEUS GERARD | Open-market sale | 4,850 | $22.63 | 202,750 |
| 2026-03-05 | Kennedy Sheryl Lynn | Open-market sale | 3,300 | $22.99 | 10,100 |
| 2026-03-05 | FERGUSON Lewis H | Open-market sale | 2,206 | $23.03 | 20,449 |
| 2025-12-31 | Chang John B. | Grant / award | 100,000 | $0.00 | 188,847 |
| 2025-12-31 | Chang John B. | Grant / award | 9,600 | $0.00 | 88,847 |
| 2025-12-31 | Harris Mark Andrew | Grant / award | 100,000 | $0.00 | 110,168 |
| 2025-12-31 | Harris Mark Andrew | Grant / award | 5,000 | $0.00 | 10,168 |
| 2025-12-31 | KILMER HENRY W | Grant / award | 9,600 | $0.00 | 43,400 |
| 2025-12-31 | WEED THADDEUS GERARD | Grant / award | 100,000 | $0.00 | 207,600 |
| 2025-12-31 | WEED THADDEUS GERARD | Grant / award | 19,400 | $0.00 | 107,600 |
| 2025-12-31 | BROOKS STEVEN D | Grant / award | 3,388 | $0.00 | 51,803 |
| 2025-12-31 | de Sa Paul | Grant / award | 3,388 | $0.00 | 26,902 |
| 2025-12-31 | FERGUSON Lewis H | Grant / award | 3,388 | $0.00 | 22,655 |
| 2025-12-31 | Howard Eve N | Grant / award | 3,388 | $0.00 | 20,416 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.