CCOI Cogent Communications Holdings, Inc.
Cogent Communications Holdings, Inc. (CCOI) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | Sold Out | -20.0K | -100.0% | $277.6K | 0.0% | 59 |
| TWO SIGMA INVESTMENTS, LP Quant | New | +11.7K | — | $163.0K | 0.0% | 57 |
| CITADEL ADVISORS LLC Quant | Increased | +746.3K | +175.1% | $10.4M | 0.0% | 56 |
| Magnetar Capital Event Quant | Sold Out | -13.8K | -100.0% | $192.2K | 0.0% | 54 |
| Weiss Asset Management Event Quant | Sold Out | -16.9K | -100.0% | $234.8K | 0.0% | 54 |
| Man Group Event Long/Short | Sold Out | -90.2K | -100.0% | $1.3M | 0.0% | 54 |
| Aristeia Capital Event Long/Short | Sold Out | -59.0K | -100.0% | $818.8K | 0.0% | 54 |
| Schonfeld Strategic Advisors Long/Short Quant | New | +86.6K | — | $1.2M | 0.0% | 53 |
| Squarepoint Ops LLC Quant | Increased | +174.8K | +341.1% | $2.4M | 0.0% | 51 |
| Y-Intercept Quant | New | +154.0K | — | $2.1M | 0.0% | 50 |
Most significant buyers
By move score, not size.
- TWO SIGMA INVESTMENTS, LP
- CITADEL ADVISORS LLC
- Schonfeld Strategic Advisors
- Squarepoint Ops LLC
- Y-Intercept
Most significant sellers
By move score, not size.
- Point72 Asset Management, L.P.
- Magnetar Capital
- Weiss Asset Management
- Man Group
- Aristeia Capital
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | 1 | 0 | 20.0K | -20.0K | -100.0% | 0.0% | Sold Out | 59 |
| TWO SIGMA INVESTMENTS, LP | 2 | 11.7K | 0 | +11.7K | — | 0.0% | New | 57 |
| CITADEL ADVISORS LLC | 1 | 1.2M | 426.3K | +746.3K | +175.1% | 0.0% | Increased | 56 |
| Magnetar Capital | 2 | 0 | 13.8K | -13.8K | -100.0% | 0.0% | Sold Out | 54 |
| Weiss Asset Management | 2 | 0 | 16.9K | -16.9K | -100.0% | 0.0% | Sold Out | 54 |
| Man Group | 3 | 0 | 90.2K | -90.2K | -100.0% | 0.0% | Sold Out | 54 |
| Aristeia Capital | 2 | 0 | 59.0K | -59.0K | -100.0% | 0.0% | Sold Out | 54 |
| Schonfeld Strategic Advisors | 3 | 86.6K | 0 | +86.6K | — | 0.0% | New | 53 |
| Squarepoint Ops LLC | 2 | 226.0K | 51.2K | +174.8K | +341.1% | 0.0% | Increased | 51 |
| Y-Intercept | 4 | 154.0K | 0 | +154.0K | — | 0.0% | New | 50 |
| Caption Management | 3 | 0 | 55.0K | -55.0K | -100.0% | 0.0% | Sold Out | 50 |
| Caxton Associates | 3 | 145.1K | 52.9K | +92.2K | +174.4% | 0.0% | Increased | 49 |
| AQR Capital Management | 3 | 615.6K | 209.9K | +405.7K | +193.3% | 0.0% | Increased | 47 |
| Walleye Capital | 3 | 12.3K | 239.6K | -227.3K | -94.9% | 0.0% | Reduced | 46 |
| Quantbot Technologies | 4 | 18.3K | 0 | +18.3K | — | 0.0% | New | 45 |
| D. E. Shaw & Co., Inc. | 1 | 284.7K | 738.8K | -454.1K | -61.5% | 0.0% | Reduced | 44 |
| MILLENNIUM MANAGEMENT LLC | 2 | 119.1K | 228.4K | -109.3K | -47.8% | 0.0% | Reduced | 40 |
| Boothbay Fund Management | 4 | 118.4K | 378.9K | -260.5K | -68.8% | 0.0% | Reduced | 38 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 49.2K | 67.1K | -17.9K | -26.7% | 0.0% | Reduced | 34 |
| Quadrature Capital | 3 | 13.2K | 25.7K | -12.5K | -48.5% | 0.0% | Reduced | 34 |
| ExodusPoint Capital Management | 3 | 35.0K | 53.6K | -18.6K | -34.7% | 0.0% | Reduced | 30 |
| Engineers Gate | 4 | 42.0K | 29.3K | +12.7K | +43.2% | 0.0% | Increased | 28 |
| Winton Group | 4 | 89.0K | 70.1K | +18.9K | +27.0% | 0.0% | Increased | 24 |
| Brevan Howard Capital Management | 3 | 19.7K | 24.2K | -4.5K | -18.6% | 0.0% | Reduced | 23 |
| Tudor Investment Corporation | 2 | 139.3K | 139.7K | -423 | -0.3% | 0.0% | Reduced | 23 |
| CenterBook Partners | 4 | 503.5K | 494.3K | +9.2K | +1.9% | 0.3% | Increased | 21 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.