AMLX Amylyx Pharmaceuticals, Inc.
Amylyx Pharmaceuticals, Inc. (AMLX) 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 | -106.5K | -100.0% | $1.9M | 0.0% | 61 |
| Alyeska Investment Group, L.P. | New | +1.05M | — | $18.9M | 0.1% | 60 |
| OrbiMed Advisors Growth Healthcare | New | +183.4K | — | $3.3M | 0.1% | 59 |
| Affinity Asset Advisors Long/Short Growth | New | +99.0K | — | $1.8M | 0.1% | 58 |
| Squarepoint Ops LLC Quant | Sold Out | -114.9K | -100.0% | $2.1M | 0.0% | 56 |
| Magnetar Capital Event Quant | New | +11.7K | — | $210.5K | 0.0% | 54 |
| D. E. Shaw & Co., Inc. Quant | Increased | +100.1K | +134.8% | $1.8M | 0.0% | 54 |
| Verition Fund Management Event Long/Short | Sold Out | -13.3K | -100.0% | $238.2K | 0.0% | 54 |
| Hudson Bay Capital Management Event | New | +50.0K | — | $898.0K | 0.0% | 53 |
| Lighthouse Investment Partners | New | +122.9K | — | $2.2M | 0.1% | 53 |
Most significant buyers
By move score, not size.
- Alyeska Investment Group, L.P.
- OrbiMed Advisors
- Affinity Asset Advisors
- Magnetar Capital
- D. E. Shaw & Co., Inc.
Most significant sellers
By move score, not size.
- Point72 Asset Management, L.P.
- Squarepoint Ops LLC
- Verition Fund Management
- CITADEL ADVISORS LLC
- Logos Global Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | 1 | 0 | 106.5K | -106.5K | -100.0% | 0.0% | Sold Out | 61 |
| Alyeska Investment Group, L.P. | 2 | 1.1M | 0 | +1.05M | — | 0.1% | New | 60 |
| OrbiMed Advisors | 2 | 183.4K | 0 | +183.4K | — | 0.1% | New | 59 |
| Affinity Asset Advisors | 2 | 99.0K | 0 | +99.0K | — | 0.1% | New | 58 |
| Squarepoint Ops LLC | 2 | 0 | 114.9K | -114.9K | -100.0% | 0.0% | Sold Out | 56 |
| Magnetar Capital | 2 | 11.7K | 0 | +11.7K | — | 0.0% | New | 54 |
| D. E. Shaw & Co., Inc. | 1 | 174.3K | 74.2K | +100.1K | +134.8% | 0.0% | Increased | 54 |
| Verition Fund Management | 2 | 0 | 13.3K | -13.3K | -100.0% | 0.0% | Sold Out | 54 |
| Hudson Bay Capital Management | 3 | 50.0K | 0 | +50.0K | — | 0.0% | New | 53 |
| Lighthouse Investment Partners | 3 | 122.9K | 0 | +122.9K | — | 0.1% | New | 53 |
| Trexquant Investment | 3 | 349.4K | 0 | +349.4K | — | 0.0% | New | 53 |
| TWO SIGMA INVESTMENTS, LP | 2 | 593.4K | 161.9K | +431.5K | +266.4% | 0.0% | Increased | 53 |
| Jain Global | 3 | 28.8K | 0 | +28.8K | — | 0.0% | New | 52 |
| Caption Management | 3 | 174 | 0 | +174 | — | 0.0% | New | 50 |
| Brevan Howard Capital Management | 3 | 11.6K | 0 | +11.6K | — | 0.0% | New | 49 |
| Graham Capital Management | 3 | 12.4K | 0 | +12.4K | — | 0.0% | New | 49 |
| Boothbay Fund Management | 4 | 36.1K | 0 | +36.1K | — | 0.0% | New | 49 |
| Aquatic Capital Management | 4 | 39.4K | 0 | +39.4K | — | 0.0% | New | 48 |
| Nantahala Capital Management | 3 | 973.4K | 535.7K | +437.7K | +81.7% | 0.6% | Increased | 47 |
| Walleye Capital | 3 | 186.6K | 61.7K | +124.9K | +202.4% | 0.0% | Increased | 47 |
| CITADEL ADVISORS LLC | 1 | 178.7K | 411.5K | -232.8K | -56.6% | 0.0% | Reduced | 43 |
| Logos Global Management | 2 | 350.0K | 700.0K | -350.0K | -50.0% | 0.3% | Reduced | 42 |
| ADAR1 Capital Management | 3 | 494.4K | 1.0M | -506.2K | -50.6% | 0.4% | Reduced | 41 |
| Perceptive Advisors | 1 | 8.3M | 8.3M | +50.0K | +0.6% | 2.3% | Increased | 41 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 1.9M | 3.6M | -1.66M | -46.6% | 0.0% | Reduced | 41 |
| Balyasny Asset Management L.P. | 2 | 685.0K | 1.1M | -422.3K | -38.1% | 0.0% | Reduced | 38 |
| Alpha Wave Global | 1 | 155.4K | 142.3K | +13.1K | +9.2% | 0.0% | Increased | 33 |
| AQR Capital Management | 3 | 20.8K | 29.1K | -8.3K | -28.4% | 0.0% | Reduced | 27 |
| Tudor Investment Corporation | 2 | 35.4K | 31.3K | +4.1K | +13.0% | 0.0% | Increased | 26 |
| Qube Research & Technologies Ltd | 2 | 681.4K | 702.2K | -20.8K | -3.0% | 0.0% | Reduced | 25 |
| Schonfeld Strategic Advisors | 3 | 66.8K | 77.8K | -11.0K | -14.1% | 0.0% | Reduced | 23 |
| Woodline Partners LP | 2 | 846.4K | 845.8K | +587 | +0.1% | 0.0% | Increased | 23 |
| Rock Springs Capital Management | 3 | 499.8K | 499.8K | 0 | +0.0% | 0.4% | Unchanged | 19 |
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.