COGENT COMMUNICATIONS HOLDINGS, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sale | 7,300 | $23.99 | $175,127 | 88,200 | Dec 11, 2025 |
| KILMER HENRY W | VP OF NETWORK STRATEGY | Sale | 4,800 | $19.79 | $94,992 | 33,800 | Dec 8, 2025 |
| FERGUSON Lewis H | — | Sale | 4,000 | $20.34 | $81,360 | 19,267 | Dec 2, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Award / Grant | 2,400 | — | — | 95,500 | Dec 1, 2025 |
| Chang John B. | VP & CHIEF LEGAL OFFICER | Award / Grant | 2,400 | — | — | 79,247 | Dec 1, 2025 |
| KILMER HENRY W | VP OF NETWORK STRATEGY | Sale | 2,400 | — | — | 38,600 | Dec 1, 2025 |
| Kennedy Sheryl Lynn | — | Sale | 2,400 | $21.34 | $51,216 | 10,012 | Nov 11, 2025 |
| FERGUSON Lewis H | — | Award / Grant | 2,395 | — | — | 23,267 | Sep 30, 2025 |
| de Sa Paul | — | Award / Grant | 2,395 | — | — | 23,514 | Sep 30, 2025 |
| Howell Deneen C | — | Award / Grant | 2,395 | — | — | 22,052 | Sep 30, 2025 |
| BROOKS STEVEN D | — | Award / Grant | 2,395 | — | — | 48,415 | Sep 30, 2025 |
| Howard Eve N | — | Award / Grant | 2,395 | — | — | 17,028 | Sep 30, 2025 |
| Kennedy Sheryl Lynn | — | Award / Grant | 2,395 | — | — | 12,412 | Sep 30, 2025 |
| Montagner Marc | — | Award / Grant | 2,395 | — | — | 89,564 | Sep 30, 2025 |
| KILMER HENRY W | VP OF NETWORK STRATEGY | Sale | 2,400 | $36.99 | $88,776 | 36,200 | Sep 5, 2025 |
| Harris Mark Andrew | VP & Chief Revenue Officer | Award / Grant | 668 | — | — | 5,168 | Sep 2, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sale | 4,900 | $36.98 | $181,202 | 93,100 | Sep 2, 2025 |
| Kennedy Sheryl Lynn | — | Sale | 2,000 | $36.35 | $72,700 | 10,017 | Aug 21, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 818,909 | $27.50 | $22,519,998 | 697,143 | Aug 8, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 1,840,669 | $32.60 | $60,005,809 | 1,516,052 | Aug 7, 2025 |
| Howard Eve N | — | Award / Grant | 1,968 | — | — | 14,633 | Jun 30, 2025 |
| BROOKS STEVEN D | — | Award / Grant | 1,968 | — | — | 46,020 | Jun 30, 2025 |
| Montagner Marc | — | Award / Grant | 1,968 | — | — | 87,169 | Jun 30, 2025 |
| Kennedy Sheryl Lynn | — | Award / Grant | 1,968 | — | — | 12,017 | Jun 30, 2025 |
| Howell Deneen C | — | Award / Grant | 1,968 | — | — | 19,657 | Jun 30, 2025 |
| FERGUSON Lewis H | — | Award / Grant | 1,968 | — | — | 20,872 | Jun 30, 2025 |
| de Sa Paul | — | Award / Grant | 1,968 | — | — | 21,119 | Jun 30, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 25,000 | $47.05 | $1,176,250 | 3,356,721 | Jun 16, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 10,000 | $47.34 | $473,400 | 3,426,721 | Jun 13, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 45,000 | $47.87 | $2,154,150 | 3,491,721 | Jun 12, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 45,000 | $48.55 | $2,184,750 | 3,546,721 | Jun 11, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 40,000 | $48.70 | $1,948,000 | 3,606,721 | Jun 10, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 15,000 | $48.99 | $734,850 | 3,646,721 | Jun 9, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sale | 4,900 | $48.04 | $235,396 | 98,000 | Jun 9, 2025 |
| KILMER HENRY W | VP OF NETWORK STRATEGY | Sale | 2,400 | $47.95 | $115,080 | 38,600 | Jun 6, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 30,000 | $47.78 | $1,433,400 | 3,701,721 | Jun 6, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 35,000 | $47.31 | $1,655,850 | 3,781,721 | Jun 5, 2025 |
| BUBECK JAMES | CHIEF REVENUE OFFICER | Sale | 2,000 | $47.50 | $95,000 | 55,142 | Jun 4, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 50,000 | $47.76 | $2,388,000 | 3,881,721 | Jun 4, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 50,000 | $47.00 | $2,350,000 | 3,946,721 | Jun 3, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 15,000 | $46.13 | $691,950 | 3,996,721 | Jun 2, 2025 |
| Chang John B. | VP & CHIEF LEGAL OFFICER | Gift | 398 | — | — | 76,847 | Jun 2, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 25,000 | $45.90 | $1,147,500 | 4,061,721 | May 30, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 25,000 | $46.90 | $1,172,500 | 4,086,721 | May 29, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 20,000 | $47.41 | $948,200 | 4,111,721 | May 28, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sale | 100 | $47.67 | $4,767 | 102,900 | May 28, 2025 |
| FERGUSON Lewis H | — | Sale | 1,100 | $47.57 | $52,327 | 18,904 | May 28, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 20,000 | $48.67 | $973,400 | 4,131,721 | May 27, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 25,000 | $46.93 | $1,173,250 | 4,151,721 | May 23, 2025 |
| SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sale | 25,000 | $46.27 | $1,156,750 | 4,176,721 | May 22, 2025 |