GHM Graham Corporation
Graham Corporation (GHM) 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 |
|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC Quant | New | +25.5K | — | $3.2M | 0.0% | 60 |
| MILLENNIUM MANAGEMENT LLC | Sold Out | -27.7K | -100.0% | $3.4M | 0.0% | 59 |
| MARSHALL WACE, LLP Long/Short | New | +8.9K | — | $1.1M | 0.0% | 58 |
| Squarepoint Ops LLC Quant | New | +36.2K | — | $4.5M | 0.0% | 57 |
| Quadrature Capital Quant | New | +12.6K | — | $1.6M | 0.0% | 55 |
| TWO SIGMA INVESTMENTS, LP Quant | Increased | +69.5K | +899.7% | $8.6M | 0.0% | 53 |
| CenterBook Partners Long/Short Quant | Sold Out | -44.9K | -100.0% | $5.6M | 0.0% | 51 |
| Walleye Capital Long/Short Quant | New | +4.8K | — | $593.8K | 0.0% | 51 |
| Trexquant Investment Quant | Sold Out | -2.8K | -100.0% | $343.6K | 0.0% | 51 |
| Aquatic Capital Management Quant | New | +10.4K | — | $1.3M | 0.0% | 50 |
Most significant buyers
By move score, not size.
- CITADEL ADVISORS LLC
- MARSHALL WACE, LLP
- Squarepoint Ops LLC
- Quadrature Capital
- TWO SIGMA INVESTMENTS, LP
Most significant sellers
By move score, not size.
- MILLENNIUM MANAGEMENT LLC
- CenterBook Partners
- Trexquant Investment
- RENAISSANCE TECHNOLOGIES LLC
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | 1 | 25.5K | 0 | +25.5K | — | 0.0% | New | 60 |
| MILLENNIUM MANAGEMENT LLC | 2 | 0 | 27.7K | -27.7K | -100.0% | 0.0% | Sold Out | 59 |
| MARSHALL WACE, LLP | 2 | 8.9K | 0 | +8.9K | — | 0.0% | New | 58 |
| Squarepoint Ops LLC | 2 | 36.2K | 0 | +36.2K | — | 0.0% | New | 57 |
| Quadrature Capital | 3 | 12.6K | 0 | +12.6K | — | 0.0% | New | 55 |
| TWO SIGMA INVESTMENTS, LP | 2 | 77.3K | 7.7K | +69.5K | +899.7% | 0.0% | Increased | 53 |
| CenterBook Partners | 4 | 0 | 44.9K | -44.9K | -100.0% | 0.0% | Sold Out | 51 |
| Walleye Capital | 3 | 4.8K | 0 | +4.8K | — | 0.0% | New | 51 |
| Trexquant Investment | 3 | 0 | 2.8K | -2.8K | -100.0% | 0.0% | Sold Out | 51 |
| Aquatic Capital Management | 4 | 10.4K | 0 | +10.4K | — | 0.0% | New | 50 |
| Boothbay Fund Management | 4 | 2.1K | 0 | +2.1K | — | 0.0% | New | 49 |
| Quantbot Technologies | 4 | 10.8K | 2.7K | +8.2K | +304.1% | 0.1% | Increased | 41 |
| Portolan Capital Management | 3 | 136.9K | 103.6K | +33.4K | +32.2% | 0.6% | Increased | 34 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 207.8K | 247.4K | -39.6K | -16.0% | 0.0% | Reduced | 33 |
| AQR Capital Management | 3 | 9.5K | 8.9K | +600 | +6.7% | 0.0% | Increased | 21 |
| Systematic Alpha Investments | 2 | 3.3K | 3.3K | 0 | +0.0% | 0.0% | Unchanged | 18 |
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.