Who owns Amylyx Pharmaceuticals, Inc.?
Institutional ownership of AMLX from SEC Form 13F filings across 136 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
136
13F holders
$1.17B
value, 2026 filers
59.2%
of shares outstanding (65.8M sh)
30
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of AMLX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 16.7M | $300.4M | 0.0% | 15% | +0.6% |
| 2 | BlackRock, Inc. | 8.8M | $158.5M | 0.0% | 7.9% | 0.0% |
| 3 | Jupiter Topco LLCNEW | 5.2M | $94.0M | 0.0% | 4.7% | new |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 4.2M | $75.9M | 0.0% | 3.8% | -49.0% |
| 5 | MORGAN STANLEY | 3.1M | $56.2M | 0.0% | 2.8% | +43.9% |
| 6 | FRANKLIN RESOURCES INC | 3.0M | $53.0M | 0.0% | 2.7% | +30.5% |
| 7 | GOLDMAN SACHS GROUP INC | 2.9M | $51.3M | 0.0% | 2.6% | +8.8% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 2.3M | $41.9M | 0.0% | 2.1% | +5.6% |
| 9 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.9M | $34.1M | 0.0% | 1.7% | -46.6% |
| 10 | JPMORGAN CHASE & CO | 1.9M | $34.9M | 0.0% | 1.7% | +1067.2% |
| 11 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | $19.1M | 0.0% | 1% | +12.4% |
| 12 | Woodline Partners LP | 846,387 | $15.2M | 0.0% | 0.8% | -50.0% |
| 13 | NORTHERN TRUST CORP | 831,740 | $14.9M | 0.0% | 0.7% | +6.6% |
| 14 | BANK OF AMERICA CORP /DE/ | 821,841 | $14.8M | 0.0% | 0.7% | -38.2% |
| 15 | Aberdeen Group plcNEW | 737,670 | $13.2M | 0.0% | 0.7% | new |
| 16 | Sixth Street Partners Management Company, L.P.NEW | 725,030 | $13.0M | 2.2% | 0.7% | new |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 725,030 | $13.0M | 0.0% | 0.7% | +1.2% |
| 18 | Connor, Clark & Lunn Investment Management Ltd. | 721,002 | $12.9M | 0.0% | 0.6% | -17.0% |
| 19 | Balyasny Asset Management L.P. | 684,974 | $12.3M | 0.0% | 0.6% | -38.1% |
| 20 | Qube Research & Technologies Ltd | 681,389 | $12.2M | 0.0% | 0.6% | -3.0% |
| 21 | VANGUARD FIDUCIARY TRUST CO | 623,078 | $11.2M | 0.0% | 0.6% | +6.3% |
| 22 | TWO SIGMA INVESTMENTS, LP | 593,435 | $10.7M | 0.0% | 0.5% | +266.4% |
| 23 | DEUTSCHE BANK AG\ | 557,937 | $10.0M | 0.0% | 0.5% | -56.0% |
| 24 | FEDERATED HERMES, INC. | 462,205 | $8.3M | 0.0% | 0.4% | +27.1% |
| 25 | Nuveen, LLC | 330,521 | $5.9M | 0.0% | 0.3% | +24.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.