COGENT COMMUNICATIONS HOLDINGS, INC.
Total Trades
135
Buys
2
Sells
131
Largest Trade
N/A
Insiders
14
Institutional Funds
207
Inst. Value
$1M+
Activist Filings
15
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $100K–$500K | 2K | $80.41 | Nov 12, 2024 |
| Kennedy Sheryl Lynn | Director | SELL | $100K–$500K | 1K | $80.58 | Nov 12, 2024 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 2K | $69.68 | Sep 3, 2024 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 60K | $72.82 | Aug 28, 2024 |
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $100K–$500K | 2K | $74.00 | Aug 26, 2024 |
| FERGUSON Lewis H | Director | SELL | $100K–$500K | 2K | $72.62 | Aug 26, 2024 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 60K | $51.78 | Jun 17, 2024 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 60K | $54.60 | Jun 13, 2024 |
| Montagner Marc | Director | BUY | $500K+ | 10K | $52.61 | Jun 11, 2024 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 2K | $52.60 | Jun 10, 2024 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | $100K–$500K | 2K | $56.00 | Jun 7, 2024 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $58.97 | Jun 4, 2024 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 2K | $57.79 | May 23, 2024 |
| FERGUSON Lewis H | Director | SELL | $100K–$500K | 2K | $58.90 | May 22, 2024 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $76.62 | Mar 4, 2024 |
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $100K–$500K | 4K | $76.00 | Dec 28, 2023 |
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $50K–$100K | 1K | $74.00 | Dec 22, 2023 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $63.70 | Dec 4, 2023 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $500K+ | 10K | $65.84 | Dec 4, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 37K | $65.18 | Dec 1, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $100K–$500K | 3K | $64.31 | Dec 1, 2023 |
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 950 | $64.59 | Nov 30, 2023 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 925 | $65.77 | Nov 27, 2023 |
| Bath Blake | Director | SELL | $500K+ | 9K | $67.14 | Nov 21, 2023 |
| Bath Blake | Director | SELL | $500K+ | 9K | $67.17 | Nov 17, 2023 |
| Bath Blake | Director | SELL | $15K–$50K | 379 | $67.00 | Nov 17, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 40K | $66.37 | Nov 16, 2023 |
| Montagner Marc | Director | SELL | $500K+ | 11K | $65.83 | Nov 15, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 18K | $65.82 | Sep 18, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 45K | $66.87 | Sep 14, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 45K | $67.68 | Sep 12, 2023 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | $100K–$500K | 2K | $69.16 | Sep 8, 2023 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $69.43 | Sep 5, 2023 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $70.96 | Sep 5, 2023 |
| FERGUSON Lewis H | Director | SELL | $15K–$50K | 650 | $69.64 | Aug 29, 2023 |
| Kennedy Sheryl Lynn | Director | SELL | $15K–$50K | 550 | $68.85 | Aug 25, 2023 |
| Kapp David Allen | VP & CHIEF TECHNIC… | SELL | $500K+ | 9K | $66.99 | Aug 14, 2023 |
| BROOKS STEVEN D | Director | SELL | $100K–$500K | 4K | $65.00 | Jun 16, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $100K–$500K | 7K | $62.44 | Jun 8, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 68K | $62.28 | Jun 8, 2023 |
| KILMER HENRY W | VP OF IP ENGINEERING | SELL | $100K–$500K | 2K | $62.23 | Jun 7, 2023 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $62.28 | Jun 5, 2023 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $61.07 | Jun 2, 2023 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 1K | $63.14 | Jun 1, 2023 |
| FERGUSON Lewis H | Director | SELL | $15K–$50K | 640 | $63.23 | May 31, 2023 |
| BROOKS STEVEN D | Director | SELL | $100K–$500K | 4K | $65.00 | May 12, 2023 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 35K | $65.38 | May 12, 2023 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $500K+ | 10K | $64.96 | May 10, 2023 |
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $100K–$500K | 5K | $73.00 | May 4, 2023 |
| Chang John B. | VP & CHIEF LEGAL O… | SELL | $15K–$50K | 500 | $70.00 | Apr 18, 2023 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 207 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Turtle Creek Asset Management Inc. | 4.0M | $1M+ | SH |
| EdgePoint Investment Group Inc. | 2.3M | $1M+ | SH |
| STATE STREET CORP | 2.1M | $1M+ | SH |
| Park West Asset Management LLC | 1.4M | $1M+ | SH |
| Harspring Capital Management, LLC | 1.4M | $1M+ | SH |
| MAGNOLIA GROUP, LLC | 1.2M | $1M+ | SH |
| FIRST TRUST ADVISORS LP | 1.2M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.0M | $1M+ | SH |
| Tyro Capital Management LLC | 1.0M | $1M+ | SH (Call) |
| Tyro Capital Management LLC | 1.0M | $1M+ | SH (Call) |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 667K | $1M+ | SH |
| CenterBook Partners LP | 602K | $1M+ | SH |
| Oakum Bay Capital LLC | 544K | $1M+ | SH |
| Palliser Capital (UK) Ltd | 426K | $1M+ | SH |
| Man Group plc | 326K | $1M+ | SH |
| REAVES W H & CO INC | 259K | $1M+ | SH |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 154K | $1M+ | SH |
| HERALD INVESTMENT MANAGEMENT Ltd | 243K | $1M+ | SH |
| GOLDMAN SACHS GROUP INC | 215K | $1M+ | SH |
| Redmond Asset Management, LLC | 200K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Turtle Creek Asset Management Inc.
SC 13G/A · Feb 17, 2026
8.2%
4.0M shares
SC 13G/A · Jan 23, 2026
14.4%
7.1M shares
Turtle Creek Asset Management Inc.
SC 13G/A · Nov 14, 2025
9.4%
4.6M shares
Turtle Creek Asset Management Inc.
SC 13G · Aug 14, 2025
5.7%
2.8M shares
SC 13G/A · Jul 18, 2025
13.0%
6.4M shares
SC 13G/A · Nov 8, 2024
14.0%
6.9M shares
SC 13G/A · Oct 23, 2024
14.0%
6.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
10.4%
5.1M shares
Vaughan Nelson Investment Management, L.P. 04-3304963
SC 13G/A · Jan 26, 2024
0.0%
0 shares
SC 13G/A · Jan 22, 2024
15.1%
7.3M shares
Vaughan Nelson Investment Management, L.P. 04-3304963
SC 13G · Feb 3, 2023
5.3%
2.6M shares
SC 13G/A · Jan 30, 2023
15.6%
7.5M shares
Renaissance Technologies LLC 26-0385758
SC 13G/A · Feb 10, 2022
4.6%
2.2M shares
SC 13G/A · Jan 27, 2022
14.8%
7.1M shares
SC 13G/A · Jan 25, 2022
14.8%
7.1M shares