Cogent Communications Holdings, Inc.
CCOI- Exchange
- Nasdaq
- Industry
- Communications Services, NEC
- SEC CIK
- 0001158324
In the last 90 days, Cogent Communications Holdings, Inc. insiders filed 0 open-market purchases and 2 sales; 224 institutions reported holding it in 13F filings for Q2 2026, worth $656.2M in total; no superinvestor holds it.
Holders of 5% or more of CCOI
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Cogent Communications Holdings, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.40%7.07M shares | +1.40 ppfrom 13.00% | Jul 18, 20252 filings | Jan 23, 2026 | SEC |
| Turtle Creek Asset Management Inc. | 13G/A | 8.20%4.04M shares | −1.20 ppfrom 9.40% | Aug 14, 20253 filings | Feb 17, 2026 | SEC |
| Park West Asset Management LLC | 13G/A | 5.60%2.81M shares | +0.50 ppfrom 5.10% | May 22, 20262 filings | Jun 17, 2026 | SEC |
| State Street Corp | 13G | 5.50%2.78M shares | New | Aug 7, 20261 filing | Aug 7, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
15 Schedule 13D and 13G filings on Cogent Communications Holdings, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 7, 20269:05 AM ET | State Street Corp | 13G | 5.50%2.78M shares | New | Jun 30, 2026 | SEC |
| Jul 31, 202611:25 AM ET | Vanguard Portfolio Management LLC | 13G/A | 4.85%2.43M shares | −0.72 ppfrom 5.57%Below 5% | Jun 30, 2026 | SEC |
| Jun 17, 20264:15 PM ET | Park West Asset Management LLCand 2 others | 13G/A | 5.60%2.81M shares | +0.50 ppfrom 5.10% | Jun 10, 2026 | SEC |
| May 22, 20264:15 PM ET | Park West Asset Management LLCand 1 other | 13G | 5.10%2.55M shares | New | May 15, 2026 | SEC |
| Apr 29, 202612:34 PM ET | Vanguard Portfolio Management LLC | 13G | 5.57%2.79M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 20265:15 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 17, 20264:26 PM ET | Turtle Creek Asset Management Inc. | 13G/A | 8.20%4.04M shares | −1.20 ppfrom 9.40% | Dec 31, 2025 | SEC |
| Jan 23, 202610:57 AM ET | BlackRock, Inc. | 13G/A | 14.40%7.07M shares | +1.40 ppfrom 13.00% | Dec 31, 2025 | SEC |
| Nov 14, 20254:50 PM ET | Turtle Creek Asset Management Inc. | 13G/A | 9.40%4.60M shares | +3.70 ppfrom 5.70% | Sep 30, 2025 | SEC |
| Aug 14, 20255:31 PM ET | Turtle Creek Asset Management Inc. | 13G | 5.70%2.79M shares | New | Jun 30, 2025 | SEC |
| Jul 18, 20252:31 PM ET | BlackRock, Inc. | 13G/A | 13.00%6.40M shares | – | Jun 30, 2025 | SEC |
| May 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20212:22 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Cogent Communications Holdings, Inc. shares.
No Form 144 notices for Cogent Communications Holdings, Inc. are on file.