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 |
|---|---|---|---|---|---|---|
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 2K | $23.03 | Mar 5, 2026 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 3K | $22.99 | Mar 5, 2026 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $22.63 | Mar 5, 2026 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 7K | $23.99 | Dec 12, 2025 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | $50K–$100K | 5K | $19.79 | Dec 8, 2025 |
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 4K | $20.34 | Dec 3, 2025 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | N/A | 2K | — | Dec 2, 2025 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 2K | $21.34 | Nov 12, 2025 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | $50K–$100K | 2K | $36.99 | Sep 5, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $36.98 | Sep 2, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 70K | $47.11 | Jun 16, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 55K | $47.40 | Jun 16, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 55K | $47.86 | Jun 12, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 55K | $48.51 | Jun 12, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 55K | $48.68 | Jun 10, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 55K | $48.64 | Jun 9, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $48.04 | Jun 9, 2025 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | $100K–$500K | 2K | $47.95 | Jun 9, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 80K | $47.78 | Jun 9, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 75K | $47.30 | Jun 9, 2025 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $50K–$100K | 2K | $47.50 | Jun 6, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 75K | $47.76 | Jun 5, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 65K | $46.97 | Jun 4, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 65K | $46.33 | Jun 3, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 25K | $45.90 | Jun 2, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 25K | $46.90 | May 30, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $500K+ | 20K | $47.41 | May 29, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $1K–$15K | 100 | $47.66 | May 29, 2025 |
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 1K | $47.57 | May 29, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $500K+ | 20K | $48.67 | May 28, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 25K | $46.93 | May 27, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 25K | $46.27 | May 23, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 40K | $46.81 | May 22, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $500K+ | 15K | $49.96 | May 21, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $500K+ | 15K | $50.99 | May 19, 2025 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $1K–$15K | 100 | $50.41 | May 16, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 40K | $50.38 | May 16, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 30K | $50.64 | May 15, 2025 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 54K | $50.37 | May 14, 2025 |
| Kennedy Sheryl Lynn | Director | SELL | $50K–$100K | 1K | $50.19 | May 13, 2025 |
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 956 | $69.36 | Mar 13, 2025 |
| KILMER HENRY W | VP OF NETWORK STRA… | SELL | N/A | 2K | — | Dec 4, 2024 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | SELL | $100K–$500K | 2K | $81.42 | Dec 3, 2024 |
| BUBECK JAMES | CHIEF REVENUE OFFI… | GRANT | N/A | 2K | — | Dec 3, 2024 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | SELL | $100K–$500K | 5K | $81.58 | Dec 3, 2024 |
| WEED THADDEUS GERARD | VICE PRESIDENT, CFO | GRANT | N/A | 2K | — | Dec 3, 2024 |
| SCHAEFFER DAVE | CHAIRMAN | SELL | $1M+ | 60K | $83.32 | Nov 27, 2024 |
| Bath Blake | Director | SELL | $500K+ | 6K | $83.69 | Nov 21, 2024 |
| FERGUSON Lewis H | Director | SELL | $50K–$100K | 846 | $81.76 | Nov 19, 2024 |
| Howard Eve N | Director | SELL | $100K–$500K | 4K | $82.02 | Nov 14, 2024 |
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