AMLX Amylyx Pharmaceuticals, Inc.
Amylyx Pharmaceuticals, Inc. (AMLX) Institutional Ownership
What the institutions did with AMLX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Only 5 managers reported a position this quarter, so the percentages above describe a very small sample.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 16.7M | 14.5% |
| BlackRock, Inc. | 8.8M | 7.7% |
| PERCEPTIVE ADVISORS LLC | 8.3M | 7.2% |
| TCG Crossover Management, LLC | 6.2M | 5.4% |
| Commodore Capital LP | 5.7M | 4.9% |
| Jupiter Topco LLC | 5.2M | 4.5% |
| Saturn V Capital Management LP | 4.6M | 4.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2M | 3.7% |
| MORGAN STANLEY | 3.1M | 2.7% |
| Driehaus Capital Management LLC | 3.0M | 2.6% |
| First Light Asset Management, LLC | 3.0M | 2.6% |
| FRANKLIN RESOURCES INC | 3.0M | 2.6% |
| GOLDMAN SACHS GROUP INC | 2.9M | 2.5% |
| STATE STREET CORP | 2.6M | 2.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3M | 2.0% |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.9M | 1.6% |
| JPMORGAN CHASE & CO | 1.9M | 1.6% |
| Siren, L.L.C. | 1.5M | 1.3% |
| EVENTIDE ASSET MANAGEMENT, LLC | 1.3M | 1.2% |
| 683 Capital Management, LLC | 1.3M | 1.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | 0.9% |
| Alyeska Investment Group, L.P. | 1.1M | 0.9% |
| Almitas Capital LLC | 974.9K | 0.8% |
| Nantahala Capital Management, LLC | 973.4K | 0.8% |
| DIMENSIONAL FUND ADVISORS LP | 902.5K | 0.8% |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.