Amylyx Pharmaceuticals, Inc. (AMLX) ownership: Top institutional holder: FMR LLC ($231.16M). Insider activity: Net Seller (1 buys, 19 sells). 1 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| FMR LLC | 16630541.00 | $231.16M | 2026-03-31 |
| BlackRock, Inc. | 8828836.00 | $122.72M | 2026-03-31 |
| PERCEPTIVE ADVISORS LLC | 8284882.00 | $115.16M | 2026-03-31 |
| TCG Crossover Management, LLC | 6243812.00 | $86.79M | 2026-03-31 |
| Commodore Capital LP | 5650000.00 | $78.53M | 2026-03-31 |
| VANGUARD GROUP INC | 5804912.00 | $70.12M | 2025-12-31 |
| JANUS HENDERSON GROUP PLC | 4986073.00 | $69.26M | 2026-03-31 |
| Saturn V Capital Management LP | 4349885.00 | $60.46M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Buy | null | 2026-05-21 | |
| Sell | null | 2026-05-21 | |
| Sell | null | 2026-03-05 |
Back to AMLX overview · AMLX earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.