Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in CCOI held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Turtle Creek Asset Management Inc. | 8.3M | $155.5M | +104.4% | 16.480% | 3.96% |
| 2 | BlackRock, Inc. | 7.1M | $133.3M | -1.6% | 14.129% | 0.00% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.7M | $51.8M | — | 5.489% | 0.00% |
| 4 | EdgePoint Investment Group Inc. | 2.3M | $43.0M | 0.0% | 4.560% | 0.34% |
| 5 | STATE STREET CORP | 2.3M | $42.8M | +9.8% | 4.539% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2.1M | $40.0M | — | 4.234% | 0.00% |
| 7 | Park West Asset Management LLC | 1.9M | $36.5M | +37.3% | 3.864% | 3.42% |
| 8 | MORGAN STANLEY | 1.9M | $35.5M | +50.3% | 3.760% | 0.00% |
| 9 | Newtyn Management, LLC | 1.6M | $30.1M | +14.3% | 3.195% | 3.22% |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.5M | $27.8M | +270.6% | 2.945% | 0.00% |
| 11 | MAGNOLIA GROUP, LLC | 1.3M | $24.3M | +3.5% | 2.576% | 4.52% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $22.7M | +2.2% | 2.407% | 0.00% |
| 13 | DigitalBridge Group, Inc. | 1.1M | $21.5M | +79.7% | 2.282% | 1.36% |
| 14 | Harspring Capital Management, LLC | 1.1M | $20.5M | -22.5% | 2.171% | 10.77% |
| 15 | CITADEL ADVISORS LLC | 1.1M | $20.3M | +129.1% | 2.153% | 0.01% |
| 16 | BlackBarn Capital Partners LP | 1.0M | $18.8M | +53.8% | 1.997% | 5.51% |
| 17 | 683 Capital Management, LLC | 950K | $17.9M | +58.4% | 1.898% | 1.39% |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 760K | $14.3M | +14.0% | 1.518% | 0.00% |
| 19 | GOLDMAN SACHS GROUP INC | 713K | $13.4M | +16.0% | 1.424% | 0.00% |
| 20 | Oakum Bay Capital LLC | 690K | $13.0M | +27.0% | 1.379% | 6.98% |
| 21 | Broad Run Investment Management, LLC | 663K | $12.5M | -0.1% | 1.324% | 2.20% |
| 22 | FMR LLC | 589K | $11.1M | -27.8% | 1.176% | 0.00% |
| 23 | GILDER GAGNON HOWE & CO LLC | 499K | $9.4M | +1.1% | 0.997% | 0.11% |
| 24 | NORTHERN TRUST CORP | 497K | $9.4M | -0.4% | 0.993% | 0.00% |
| 25 | CenterBook Partners LP | 494K | $9.3M | -17.9% | 0.987% | 0.50% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in CCOI — a direct measure of their conviction.
Filings activity in CCOI during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 228 | 5.4% | 127.12% | 5.83 pp | $1.01B | 4.4% |
| Q4 2025 | 241 | 6.2% | 132.95% | 67.04 pp | $1.06B | 45% |
| Q3 2025 | 257 | 11% | 199.99% | +0.00 pp | $1.92B | 15% |
| Q2 2025 | 288 | 8.0% | 199.99% | +0.00 pp | $2.26B | 16% |
| Q1 2025 | 313 | +4.3% | 199.99% | +0.00 pp | $2.69B | 20% |
| Q4 2024 | 300 | 0.3% | 199.99% | +0.00 pp | $3.34B | +1.2% |
| Q3 2024 | 301 | +0.0% | 199.99% | +0.00 pp | $3.30B | +34% |
| Q2 2024 | 301 | — | 199.99% | — | $2.46B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying CCOI stock.
Based on Q1 2026 13F filings, institutional ownership of Cogent Communications Holdings, Inc. stands at 127.1%, held across 228 reporting institutions.
Turtle Creek Asset Management Inc. is the largest reported institutional holder of CCOI, with approximately 8,252,844 shares worth $0.16B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of CCOI, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for CCOI is 39 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
44 institutions opened new positions in CCOI during Q1 2026, while 57 fully exited. 57 added to existing positions and 126 trimmed.
CCOI institutional ownership fell by 5.83 percentage points quarter-over-quarter, with a net change of -13 holders.
The top 10 institutions account for 59.1% of all reported 13F value in CCOI, and the top 25 account for 82.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Cogent Communications Holdings, Inc. (CCOI) Institutional Ownership