ORN Orion Group Holdings, Inc.
Orion Group Holdings, Inc. (ORN) 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 |
|---|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. Quant | New | +41.0K | — | $689.8K | 0.0% | 58 |
| Tudor Investment Corporation Macro | New | +149.2K | — | $2.5M | 0.0% | 56 |
| CITADEL ADVISORS LLC Quant | Increased | +406.6K | +141.7% | $6.8M | 0.0% | 54 |
| MILLENNIUM MANAGEMENT LLC | Increased | +243.7K | +288.4% | $4.1M | 0.0% | 53 |
| Walleye Capital Long/Short Quant | New | +160.3K | — | $2.7M | 0.0% | 53 |
| Man Group Event Long/Short | New | +29.2K | — | $490.9K | 0.0% | 52 |
| Voleon Capital Management Quant | New | +10.5K | — | $175.9K | 0.0% | 51 |
| Boothbay Fund Management | New | +85.0K | — | $1.4M | 0.0% | 51 |
| Brevan Howard Capital Management Macro | Sold Out | -14.0K | -100.0% | $235.1K | 0.0% | 49 |
| Y-Intercept Quant | New | +52.1K | — | $877.1K | 0.0% | 48 |
Most significant buyers
By move score, not size.
- D. E. Shaw & Co., Inc.
- Tudor Investment Corporation
- CITADEL ADVISORS LLC
- MILLENNIUM MANAGEMENT LLC
- Walleye Capital
Most significant sellers
By move score, not size.
- Brevan Howard Capital Management
- Aquatic Capital Management
- Balyasny Asset Management L.P.
- CenterBook Partners
- RENAISSANCE TECHNOLOGIES LLC
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. | 1 | 41.0K | 0 | +41.0K | — | 0.0% | New | 58 |
| Tudor Investment Corporation | 2 | 149.2K | 0 | +149.2K | — | 0.0% | New | 56 |
| CITADEL ADVISORS LLC | 1 | 693.4K | 286.8K | +406.6K | +141.7% | 0.0% | Increased | 54 |
| MILLENNIUM MANAGEMENT LLC | 2 | 328.2K | 84.5K | +243.7K | +288.4% | 0.0% | Increased | 53 |
| Walleye Capital | 3 | 160.3K | 0 | +160.3K | — | 0.0% | New | 53 |
| Man Group | 3 | 29.2K | 0 | +29.2K | — | 0.0% | New | 52 |
| Voleon Capital Management | 3 | 10.5K | 0 | +10.5K | — | 0.0% | New | 51 |
| Boothbay Fund Management | 4 | 85.0K | 0 | +85.0K | — | 0.0% | New | 51 |
| Brevan Howard Capital Management | 3 | 0 | 14.0K | -14.0K | -100.0% | 0.0% | Sold Out | 49 |
| Y-Intercept | 4 | 52.1K | 0 | +52.1K | — | 0.0% | New | 48 |
| Aquatic Capital Management | 4 | 0 | 5.0K | -5.0K | -100.0% | 0.0% | Sold Out | 48 |
| Quantbot Technologies | 4 | 14.8K | 0 | +14.8K | — | 0.0% | New | 45 |
| Winton Group | 4 | 28.9K | 15.1K | +13.8K | +91.1% | 0.0% | Increased | 40 |
| Balyasny Asset Management L.P. | 2 | 18.6K | 39.8K | -21.2K | -53.3% | 0.0% | Reduced | 40 |
| CenterBook Partners | 4 | 165.3K | 543.8K | -378.5K | -69.6% | 0.1% | Reduced | 39 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 133.5K | 193.4K | -59.9K | -31.0% | 0.0% | Reduced | 37 |
| Point72 Asset Management, L.P. | 1 | 103.3K | 146.5K | -43.2K | -29.5% | 0.0% | Reduced | 36 |
| Engineers Gate | 4 | 11.2K | 41.1K | -29.9K | -72.8% | 0.0% | Reduced | 35 |
| TWO SIGMA INVESTMENTS, LP | 2 | 71.3K | 52.0K | +19.4K | +37.3% | 0.0% | Increased | 35 |
| Qube Research & Technologies Ltd | 2 | 172.8K | 182.8K | -10.0K | -5.5% | 0.0% | Reduced | 25 |
| Squarepoint Ops LLC | 2 | 96.1K | 99.2K | -3.1K | -3.1% | 0.0% | Reduced | 24 |
| AQR Capital Management | 3 | 210.8K | 229.2K | -18.4K | -8.0% | 0.0% | Reduced | 22 |
| Centiva Capital | 4 | 20.8K | 23.3K | -2.5K | -10.9% | 0.0% | Reduced | 20 |
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.