PRLB Proto Labs Inc
Proto Labs Inc (PRLB) 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 |
|---|---|---|---|---|---|---|
| Bridgewater Associates Quant Macro | Sold Out | -7.7K | -100.0% | $626.8K | 0.0% | 61 |
| Qube Research & Technologies Ltd Quant | Sold Out | -148.6K | -100.0% | $12.1M | 0.0% | 59 |
| Polar Asset Management Partners Long/Short | Sold Out | -60.4K | -100.0% | $4.9M | 0.0% | 56 |
| ExodusPoint Capital Management Long/Short Quant | New | +33.7K | — | $2.7M | 0.0% | 54 |
| CITADEL ADVISORS LLC Quant | Increased | +44.1K | +99.1% | $3.6M | 0.0% | 54 |
| MILLENNIUM MANAGEMENT LLC | Increased | +67.1K | +259.9% | $5.5M | 0.0% | 53 |
| Rubric Capital Management Event | Reduced | -377.7K | -77.7% | $30.8M | 0.1% | 53 |
| Man Group Event Long/Short | Sold Out | -5.1K | -100.0% | $416.8K | 0.0% | 52 |
| Schonfeld Strategic Advisors Long/Short Quant | Sold Out | -4.8K | -100.0% | $390.8K | 0.0% | 51 |
| CenterBook Partners Long/Short Quant | New | +5.9K | — | $479.3K | 0.0% | 49 |
Most significant buyers
By move score, not size.
- ExodusPoint Capital Management
- CITADEL ADVISORS LLC
- MILLENNIUM MANAGEMENT LLC
- CenterBook Partners
- Quadrature Capital
Most significant sellers
By move score, not size.
- Bridgewater Associates
- Qube Research & Technologies Ltd
- Polar Asset Management Partners
- Rubric Capital Management
- Man Group
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Bridgewater Associates | 1 | 0 | 7.7K | -7.7K | -100.0% | 0.0% | Sold Out | 61 |
| Qube Research & Technologies Ltd | 2 | 0 | 148.6K | -148.6K | -100.0% | 0.0% | Sold Out | 59 |
| Polar Asset Management Partners | 3 | 0 | 60.4K | -60.4K | -100.0% | 0.0% | Sold Out | 56 |
| ExodusPoint Capital Management | 3 | 33.7K | 0 | +33.7K | — | 0.0% | New | 54 |
| CITADEL ADVISORS LLC | 1 | 88.6K | 44.5K | +44.1K | +99.1% | 0.0% | Increased | 54 |
| MILLENNIUM MANAGEMENT LLC | 2 | 93.0K | 25.8K | +67.1K | +259.9% | 0.0% | Increased | 53 |
| Rubric Capital Management | 1 | 108.7K | 486.4K | -377.7K | -77.7% | 0.1% | Reduced | 53 |
| Man Group | 3 | 0 | 5.1K | -5.1K | -100.0% | 0.0% | Sold Out | 52 |
| Schonfeld Strategic Advisors | 3 | 0 | 4.8K | -4.8K | -100.0% | 0.0% | Sold Out | 51 |
| CenterBook Partners | 4 | 5.9K | 0 | +5.9K | — | 0.0% | New | 49 |
| Quantbot Technologies | 4 | 0 | 20.8K | -20.8K | -100.0% | 0.0% | Sold Out | 47 |
| Quadrature Capital | 3 | 12.0K | 4.6K | +7.4K | +160.0% | 0.0% | Increased | 47 |
| MARSHALL WACE, LLP | 2 | 16.9K | 68.4K | -51.4K | -75.2% | 0.0% | Reduced | 46 |
| Edgestream Partners | 4 | 65.8K | 19.0K | +46.8K | +246.0% | 0.2% | Increased | 46 |
| Aquatic Capital Management | 4 | 11.0K | 3.0K | +8.1K | +272.2% | 0.0% | Increased | 42 |
| Trexquant Investment | 3 | 14.2K | 68.7K | -54.5K | -79.3% | 0.0% | Reduced | 42 |
| Squarepoint Ops LLC | 2 | 16.4K | 41.3K | -24.9K | -60.2% | 0.0% | Reduced | 41 |
| Engineers Gate | 4 | 26.8K | 14.5K | +12.3K | +84.7% | 0.0% | Increased | 40 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 469.3K | 520.3K | -51.0K | -9.8% | 0.1% | Reduced | 32 |
| Point72 Asset Management, L.P. | 1 | 37.0K | 32.4K | +4.6K | +14.3% | 0.0% | Increased | 32 |
| Winton Group | 4 | 3.5K | 7.6K | -4.0K | -53.2% | 0.0% | Reduced | 31 |
| D. E. Shaw & Co., Inc. | 1 | 211.4K | 225.7K | -14.3K | -6.3% | 0.0% | Reduced | 30 |
| Centiva Capital | 4 | 3.1K | 5.1K | -2.0K | -38.6% | 0.0% | Reduced | 27 |
| TWO SIGMA INVESTMENTS, LP | 2 | 12.7K | 12.2K | +534 | +4.4% | 0.0% | Increased | 27 |
| Gotham Asset Management, LLC | 2 | 9.9K | 11.0K | -1.1K | -10.1% | 0.0% | Reduced | 26 |
| AQR Capital Management | 3 | 53.3K | 55.1K | -1.8K | -3.3% | 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.