| 2.94% |
| 4 | STATE STREET CORP | 2.8M | $38.6M | +22.3% | 5.550% | 0.00% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.4M | $33.1M | -13.2% | 4.763% | 0.00% |
| 6 | EdgePoint Investment Group Inc. | 2.3M | $31.7M | 0.0% | 4.560% | 0.24% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2.0M | $28.3M | -3.9% | 4.069% | 0.00% |
| 8 | Newtyn Management, LLC | 1.7M | $23.0M | +3.5% | 3.307% | 2.87% |
| 9 | CITADEL ADVISORS LLC | 1.6M | $22.6M | +51.0% | 3.252% | 0.00% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $17.3M | +3.3% | 2.487% | 0.00% |
| 11 | MAGNOLIA GROUP, LLC | 980K | $13.6M | -24.1% | 1.956% | 2.86% |
| 12 | GOLDMAN SACHS GROUP INC | 973K | $13.5M | +36.5% | 1.943% | 0.00% |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 805K | $11.2M | +5.9% | 1.608% | 0.00% |
| 14 | GILDER GAGNON HOWE & CO LLC | 784K | $10.9M | +57.0% | 1.565% | 0.11% |
| 15 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 692K | $9.6M | -53.1% | 1.381% | 0.00% |
| 16 | Broad Run Investment Management, LLC | 660K | $9.2M | -0.5% | 1.318% | 1.41% |
| 17 | MORGAN STANLEY | 628K | $8.7M | -66.7% | 1.253% | 0.00% |
| 18 | AQR CAPITAL MANAGEMENT LLC | 616K | $8.5M | +193.3% | 1.229% | 0.00% |
| 19 | Harspring Capital Management, LLC | 599K | $8.3M | -44.9% | 1.197% | 15.49% |
| 20 | NORTHERN TRUST CORP | 517K | $7.2M | +3.9% | 1.032% | 0.00% |
| 21 | UBS Group AG | 513K | $7.1M | +20.3% | 1.024% | 0.00% |
| 22 | CenterBook Partners LP | 503K | $7.0M | +1.9% | 1.005% | 0.34% |
| 23 | AYAL Capital Advisors Ltd | 400K | $5.6M | — | 0.799% | 1.50% |
| 24 | FRONTIER CAPITAL MANAGEMENT CO LLC | 383K | $5.3M | -4.2% | 0.764% | 0.05% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 344K | $4.8M | +2.9% | 0.687% | 0.00% |
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.
| 93.50% |
| 2.14 pp |
| $2.69B |
| 20% |
| Q4 2024 | 300 | 0.3% | 95.64% | 0.07 pp | $3.34B | +1.2% |
| Q3 2024 | 301 | — | 95.71% | — | $3.30B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
39 institutions opened new positions in CCOI during Q2 2026, while 47 fully exited. 29 added to existing positions and 154 trimmed.
CCOI institutional ownership fell by 16.06 percentage points quarter-over-quarter, with a net change of -12 holders.
The top 10 institutions account for 60.4% of all reported 13F value in CCOI, and the top 25 account for 80.2%.
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