Amylyx Pharmaceuticals Inc (AMLX)
Who owns Amylyx Pharmaceuticals Inc (AMLX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 75.1% of the shares are freely tradable; institutional investors hold 105.3%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 14.96 | 16,630,541 | +0.7 | 03/31/2026 |
| BlackRock Inc | 7.94 | 8,828,836 | -2.5 | 03/31/2026 |
| Perceptive Advisors LLC | 7.45 | 8,284,882 | +0.0 | 03/31/2026 |
| TCG Crossover Management, LLC | 5.62 | 6,243,812 | +0.0 | 03/31/2026 |
| Vanguard Group Inc | 5.22 | 5,804,912 | +10.1 | 12/31/2025 |
| COMMODORE CAPITAL LP | 5.08 | 5,650,000 | +0.0 | 03/31/2026 |
| HHG PLC | 4.48 | 4,986,073 | +11.6 | 03/31/2026 |
| Saturn V Capital Management LLC | 3.91 | 4,349,885 | -3.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.72 | 4,141,575 | +0.0 | 03/31/2026 |
| Adage Capital Partners Gp LLC | 3.20 | 3,560,764 | +28.2 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 10. Jul 2026 | Mazzariello Gina | Chief Legal Officer | Sell | 15,000 | 17.61 | 264,122 |
| 9. Jul 2026 | Mazzariello Gina | Chief Legal Officer | Sell | 15,000 | 18.32 | 274,746 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.