ACGL Arch Capital Group Ltd.
Arch Capital Group Ltd. (ACGL) 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 |
|---|---|---|---|---|---|---|
| Egerton Capital Long/Short Growth | Sold Out | -1.12M | -100.0% | $108.4M | 0.0% | 73 |
| Qube Research & Technologies Ltd Quant | Sold Out | -561.9K | -100.0% | $54.5M | 0.0% | 61 |
| Prana Capital Management Long/Short | Sold Out | -169.5K | -100.0% | $16.4M | 0.0% | 59 |
| CITADEL ADVISORS LLC Quant | Increased | +173.1K | +174.6% | $16.8M | 0.0% | 56 |
| Weiss Asset Management Event Quant | Increased | +159.2K | +376.3% | $15.4M | 0.3% | 54 |
| Voleon Capital Management Quant | New | +16.9K | — | $1.6M | 0.0% | 53 |
| Squarepoint Ops LLC Quant | Increased | +219.6K | +2311.0% | $21.3M | 0.1% | 53 |
| Capital Fund Management Quant Macro | Increased | +175.2K | +289.4% | $17.0M | 0.2% | 52 |
| Edgestream Partners Quant | New | +35.8K | — | $3.5M | 0.1% | 51 |
| Winton Group Quant Macro | New | +47.7K | — | $4.6M | 0.2% | 51 |
Most significant buyers
By move score, not size.
- CITADEL ADVISORS LLC
- Weiss Asset Management
- Voleon Capital Management
- Squarepoint Ops LLC
- Capital Fund Management
Most significant sellers
By move score, not size.
- Egerton Capital
- Qube Research & Technologies Ltd
- Prana Capital Management
- Brevan Howard Capital Management
- ExodusPoint Capital Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Egerton Capital | 1 | 0 | 1.1M | -1.12M | -100.0% | 0.0% | Sold Out | 73 |
| Qube Research & Technologies Ltd | 2 | 0 | 561.9K | -561.9K | -100.0% | 0.0% | Sold Out | 61 |
| Prana Capital Management | 3 | 0 | 169.5K | -169.5K | -100.0% | 0.0% | Sold Out | 59 |
| CITADEL ADVISORS LLC | 1 | 272.3K | 99.2K | +173.1K | +174.6% | 0.0% | Increased | 56 |
| Weiss Asset Management | 2 | 201.5K | 42.3K | +159.2K | +376.3% | 0.3% | Increased | 54 |
| Voleon Capital Management | 3 | 16.9K | 0 | +16.9K | — | 0.0% | New | 53 |
| Squarepoint Ops LLC | 2 | 229.1K | 9.5K | +219.6K | +2311.0% | 0.1% | Increased | 53 |
| Capital Fund Management | 3 | 235.7K | 60.5K | +175.2K | +289.4% | 0.2% | Increased | 52 |
| Edgestream Partners | 4 | 35.8K | 0 | +35.8K | — | 0.1% | New | 51 |
| Winton Group | 4 | 47.7K | 0 | +47.7K | — | 0.2% | New | 51 |
| Walleye Capital | 3 | 215 | 0 | +215 | — | 0.0% | New | 51 |
| Gotham Asset Management, LLC | 2 | 158.3K | 70.0K | +88.3K | +126.1% | 0.0% | Increased | 51 |
| Brevan Howard Capital Management | 3 | 0 | 10.0K | -10.0K | -100.0% | 0.0% | Sold Out | 49 |
| Quadrature Capital | 3 | 23.1K | 8.5K | +14.6K | +171.1% | 0.0% | Increased | 49 |
| Centiva Capital | 4 | 4.0K | 0 | +4.0K | — | 0.0% | New | 48 |
| Schonfeld Strategic Advisors | 3 | 9.0K | 3.9K | +5.2K | +132.6% | 0.0% | Increased | 45 |
| ExodusPoint Capital Management | 3 | 21.2K | 87.6K | -66.4K | -75.8% | 0.0% | Reduced | 43 |
| AQR Capital Management | 3 | 1.4M | 2.7M | -1.38M | -50.4% | 0.0% | Reduced | 41 |
| TWO SIGMA INVESTMENTS, LP | 2 | 787.2K | 1.3M | -486.5K | -38.2% | 0.1% | Reduced | 40 |
| Jain Global | 3 | 95.6K | 199.9K | -104.3K | -52.2% | 0.1% | Reduced | 39 |
| Balyasny Asset Management L.P. | 2 | 7.9K | 5.3K | +2.6K | +47.9% | 0.0% | Increased | 38 |
| MILLENNIUM MANAGEMENT LLC | 2 | 305.9K | 430.6K | -124.7K | -29.0% | 0.0% | Reduced | 38 |
| Bridgewater Associates | 1 | 223.9K | 246.2K | -22.3K | -9.1% | 0.1% | Reduced | 35 |
| Tudor Investment Corporation | 2 | 108.6K | 78.3K | +30.3K | +38.7% | 0.1% | Increased | 34 |
| Graham Capital Management | 3 | 17.4K | 32.1K | -14.7K | -45.9% | 0.1% | Reduced | 32 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 160.1K | 195.2K | -35.1K | -18.0% | 0.0% | Reduced | 31 |
| D. E. Shaw & Co., Inc. | 1 | 62.8K | 64.7K | -1.8K | -2.8% | 0.0% | Reduced | 27 |
| Quantbot Technologies | 4 | 109.0K | 82.4K | +26.6K | +32.3% | 0.4% | Increased | 26 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 236.5K | 239.5K | -3.0K | -1.2% | 0.1% | Reduced | 26 |
| Man Group | 3 | 416.3K | 432.2K | -16.0K | -3.7% | 0.1% | Reduced | 24 |
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.