CCOI Cogent Communications Holdings, Inc.
Cogent Communications Holdings, Inc. (CCOI) Institutional Ownership
What the institutions did with CCOI last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 7.4M | 15.6% |
| TURTLE CREEK ASSET MANAGEMENT INC. | 4.2M | 8.9% |
| Park West Asset Management LLC | 3.1M | 6.6% |
| STATE STREET CORP | 2.8M | 5.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.4M | 5.0% |
| EdgePoint Investment Group Inc. | 2.3M | 4.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.0M | 4.3% |
| Newtyn Management, LLC | 1.7M | 3.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2M | 2.6% |
| CITADEL ADVISORS LLC | 1.2M | 2.5% |
| MAGNOLIA GROUP, LLC | 979.7K | 2.1% |
| GOLDMAN SACHS GROUP INC | 973.1K | 2.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 805.2K | 1.7% |
| GILDER GAGNON HOWE & CO LLC | 783.8K | 1.7% |
| Broad Run Investment Management, LLC | 660.1K | 1.4% |
| MORGAN STANLEY | 627.6K | 1.3% |
| AQR CAPITAL MANAGEMENT LLC | 615.6K | 1.3% |
| Harspring Capital Management, LLC | 599.4K | 1.3% |
| HRT FINANCIAL LP | 557.7K | 1.2% |
| NORTHERN TRUST CORP | 516.7K | 1.1% |
| UBS Group AG | 512.6K | 1.1% |
| CenterBook Partners LP | 503.5K | 1.1% |
| AYAL Capital Advisors Ltd | 400.0K | 0.8% |
| FRONTIER CAPITAL MANAGEMENT CO LLC | 382.6K | 0.8% |
| VANGUARD FIDUCIARY TRUST CO | 344.1K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| MORGAN STANLEY | Reduced | 1.9M | 627.6K | -1.3M |
| Park West Asset Management LLC | Increased | 1.9M | 3.1M | +1.2M |
| DigitalBridge Group, Inc. | Sold Out | 1.1M | 0 | -1.1M |
| CITADEL ADVISORS LLC | Increased | 426.3K | 1.2M | +746.3K |
| STATE STREET CORP | Increased | 2.3M | 2.8M | +506.1K |
| Harspring Capital Management, LLC | Reduced | 1.1M | 599.4K | -487.6K |
| D. E. Shaw & Co., Inc. | Reduced | 738.8K | 284.7K | -454.1K |
| 683 Capital Management, LLC | Sold Out | 450.3K | 0 | -450.3K |
| FMR LLC | Reduced | 588.8K | 165.2K | -423.6K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 209.9K | 615.6K | +405.7K |
| AYAL Capital Advisors Ltd | New | 0 | 400.0K | +400.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 2.7M | 2.4M | -363.8K |
| MAGNOLIA GROUP, LLC | Reduced | 1.3M | 979.7K | -310.5K |
| BlackRock, Inc. | Increased | 7.1M | 7.4M | +301.0K |
| GILDER GAGNON HOWE & CO LLC | Increased | 499.3K | 783.8K | +284.5K |
| BOOTHBAY FUND MANAGEMENT, LLC | Reduced | 378.9K | 118.4K | -260.5K |
| GOLDMAN SACHS GROUP INC | Increased | 712.9K | 973.1K | +260.2K |
| Jump Financial, LLC | New | 0 | 251.7K | +251.7K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 77.8K | 328.1K | +250.3K |
| BlackBarn Capital Partners LP | Reduced | 500.0K | 250.0K | -250.0K |
| MYDA Advisors LLC | New | 0 | 240.0K | +240.0K |
| Walleye Capital LLC | Reduced | 239.6K | 12.3K | -227.3K |
| JPMORGAN CHASE & CO | Reduced | 492.5K | 267.5K | -225.0K |
| JANE STREET GROUP, LLC | Reduced | 277.5K | 69.6K | -207.9K |
| XTX Topco Ltd | Increased | 29.3K | 220.3K | +191.0K |
| Squarepoint Ops LLC | Increased | 51.2K | 226.0K | +174.8K |
| Y-Intercept (Hong Kong) Ltd | New | 0 | 154.0K | +154.0K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 130.1K | 280.8K | +150.7K |
| TURTLE CREEK ASSET MANAGEMENT INC. | Reduced | 4.3M | 4.2M | -145.4K |
| Global Endowment Management, LP | Increased | 18.4K | 158.6K | +140.1K |
| ALGERT GLOBAL LLC | New | 0 | 132.5K | +132.5K |
| BLUEFIN CAPITAL MANAGEMENT, LLC | Sold Out | 132.3K | 0 | -132.3K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 228.4K | 119.1K | -109.3K |
| Palliser Capital (UK) Ltd | Reduced | 334.4K | 236.4K | -98.1K |
| CAXTON ASSOCIATES LLP | Increased | 52.9K | 145.1K | +92.2K |
| Man Group plc | Sold Out | 90.2K | 0 | -90.2K |
| UBS Group AG | Increased | 426.0K | 512.6K | +86.7K |
| Schonfeld Strategic Advisors LLC | New | 0 | 86.6K | +86.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 2.1M | 2.0M | -82.8K |
| SIMPLEX TRADING, LLC | Reduced | 91.9K | 15.0K | -76.9K |
| Quantinno Capital Management LP | Reduced | 108.9K | 45.2K | -63.7K |
| ARISTEIA CAPITAL, L.L.C. | Sold Out | 59.0K | 0 | -59.0K |
| ACADIAN ASSET MANAGEMENT LLC | New | 0 | 56.5K | +56.5K |
| Newtyn Management, LLC | Increased | 1.6M | 1.7M | +55.9K |
| Caption Management, LLC | Sold Out | 55.0K | 0 | -55.0K |
| HRT FINANCIAL LP | Increased | 509.1K | 557.7K | +48.6K |
| Corient Private Wealth LP | Sold Out | 47.6K | 0 | -47.6K |
| BANK OF AMERICA CORP /DE/ | Reduced | 302.4K | 254.9K | -47.5K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 760.1K | 805.2K | +45.1K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.2M | 1.2M | +39.8K |
| Navis Wealth Advisors, LLC | Sold Out | 39.5K | 0 | -39.5K |
| New Age Alpha Advisors, LLC | New | 0 | 37.7K | +37.7K |
| Numerai GP LLC | New | 0 | 36.4K | +36.4K |
| Advisors Asset Management, Inc. | Reduced | 149.7K | 114.4K | -35.3K |
| OCCUDO QUANTITATIVE STRATEGIES LP | New | 0 | 33.6K | +33.6K |
| BLAIR WILLIAM & CO/IL | Reduced | 166.5K | 134.4K | -32.1K |
| GROUP ONE TRADING LLC | New | 0 | 31.8K | +31.8K |
| LPL Financial LLC | Increased | 90.6K | 122.3K | +31.7K |
| ALTFEST L J & CO INC | Sold Out | 30.3K | 0 | -30.3K |
| Skylands Capital, LLC | Increased | 68.7K | 98.4K | +29.8K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.