Amylyx Pharmaceuticals Ownership | Who Owns Amylyx Pharmaceuticals?
Amylyx Pharmaceuticals Ownership Summary
Amylyx Pharmaceuticals is owned by 11.99% institutional investors, 7.91% insiders, and 80.09% retail investors. Fmr is the largest institutional shareholder, holding 17.59% of AMLX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.81% of its assets in Amylyx Pharmaceuticals shares.
AMLX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Amylyx Pharmaceuticals | 11.99% | 7.91% | 80.09% |
| Sector | Healthcare Stocks | 35.34% | 11.88% | 52.77% |
| Industry | Biotech Stocks | 35.37% | 11.83% | 52.80% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Fmr | 16.63M | 17.59% | $231.16M |
| Blackrock funding, inc. /de | 8.83M | 9.34% | $122.72M |
| Perceptive advisors | 8.28M | 8.76% | $115.16M |
| Tcg crossover management | 6.24M | 6.60% | $86.79M |
| Vanguard group | 5.80M | 6.22% | $70.12M |
| Commodore capital lp | 5.65M | 5.97% | $78.53M |
| Janus henderson group | 4.99M | 5.27% | $69.26M |
| Saturn v capital management | 4.35M | 4.60% | $60.46M |
| Blackrock | 2.67M | 3.93% | $5.07M |
| Adage capital partners gp | 3.56M | 3.77% | $49.49M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Saturn v capital management | 4.35M | 10.95% | $60.46M |
| Allostery investments lp | 120.12K | 9.81% | $769.96K |
| Almitas capital | 2.12M | 6.67% | $29.50M |
| Great point partners | 1.75M | 5.59% | $24.32M |
| Commodore capital lp | 5.65M | 4.54% | $78.53M |
| First light asset management | 3.19M | 3.97% | $44.35M |
| Ally bridge group (ny) | 437.39K | 3.62% | $5.94M |
| Tcg crossover management | 6.24M | 2.48% | $86.79M |
| Perceptive advisors | 8.28M | 2.25% | $115.16M |
| Aldebaran capital | 197.89K | 2.10% | $2.75M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Paradigm biocapital advisors lp | 1.90M | 0.73% | 1.90M |
| Siren | 1.23M | 0.47% | 1.23M |
| Franklin resources | 2.26M | 0.01% | 1.06M |
| Adage capital partners gp | 3.56M | 0.08% | 783.71K |
| Barclays | 971.85K | 0.00% | 676.68K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 2.67M | 0.00% | -1.80M |
| Boxer capital | - | - | -1.50M |
| Farallon capital management | - | - | -1.15M |
| Alyeska investment group | - | - | -750.41K |
| Abrdn | - | - | -738.66K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Paradigm biocapital advisors lp | 1.90M | 0.73% | 1.90M | $25.82M |
| Siren | 1.23M | 0.47% | 1.23M | $17.10M |
| Braidwell lp | 612.84K | 0.25% | 612.84K | $8.33M |
| Vanguard fiduciary trust | 586.15K | 0.00% | 586.15K | $8.15M |
| Ally bridge group (ny) | 437.39K | 3.62% | 437.39K | $5.94M |
Sold Out
| Holder | Change |
|---|---|
| Ifp advisors | -1.00 |
| Nelson, van denburg & campbell wealth management group | -10.00 |
| Financial consulate | -25.00 |
| Kelly financial services | -33.00 |
| Skopos labs | -42.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 67 | -64.74% | 11,342,671 | -89.90% | 11 | 0.08% | 27 | -75.23% | 25 | -46.81% |
| Dec 31, 2025 | 114 | -35.23% | 37,817,895 | -65.53% | 40 | 0.27% | 65 | -38.10% | 25 | -46.81% |
| Sep 30, 2025 | 170 | 34.92% | 109,563,434 | 39.61% | 122 | 1.59% | 101 | 46.38% | 46 | 43.75% |
| Jun 30, 2025 | 131 | -2.96% | 81,652,437 | 17.21% | 91 | 1.39% | 70 | -12.50% | 35 | 12.90% |
| Mar 31, 2025 | 137 | 3.79% | 73,635,543 | 47.89% | 85 | 1.61% | 82 | 24.24% | 30 | -26.83% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.10M | 2.81% | - |
| Fidelity Advisor Biotechnology I | 2.43M | 2.19% | - |
| iShares Russell 2000 ETF | 2.16M | 1.94% | 18.19K |
| Fidelity Small Cap Growth | 2.12M | 1.90% | - |
| Eventide Healthcare & Life Sciences I | 1.51M | 1.37% | - |
| Fidelity Select Health Care | 1.42M | 1.28% | - |
| Xtrackers S&P 500 Swap ETF 1C | 1.24M | 1.13% | -9.15K |
| Fidelity Select Biotechnology | 1.22M | 1.10% | - |
| Strategic Advisers Fidelity US TtlStk | 1.14M | 1.02% | - |
| Franklin Biotechnology Discv A(acc)USD | 1.11M | 1.00% | 82.08K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Mar 02, 2026 | Klee Justin B. | Co-Chief Executive Officer | Sell | $423.76K |
| Mar 02, 2026 | Cohen Joshua B | Co-Chief Executive Officer | Sell | $424.12K |
| Mar 02, 2026 | Bedrosian Camille L | Chief Medical Officer | Sell | $94.21K |
| Mar 02, 2026 | FRATES JAMES M | Chief Financial Officer | Sell | $114.85K |
| Mar 02, 2026 | Mazzariello Gina | Chief Legal Officer | Sell | $99.38K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 17 |
| 2025 Q4 | 1 | 1 |
| 2025 Q3 | - | 9 |
| 2025 Q2 | - | - |
| 2025 Q1 | 1 | 14 |
AMLX Ownership FAQ
Try Tickergate Pro Free
Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)
Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis
Discover trending investment themes
Find your next best investment
Research stocks using tools