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AMYLYX PHARM (AMLX)
NASDAQ
$39.34+$0.68 (+1.76%)
Price as of Aug 21, 2026 7:55 PM EDT- $4.3BMarket Cap
- 315.70%1-Year Change
- Drug Manufacturers - Specialty & GenericIndustry
AMYLYX PHARM (AMLX)
$39.34+$0.68 (+1.76%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FMR LLC | 15.04% | 16.7M | +97,368 (+0.58%) | Jun 30, 2026 |
BLACKROCK, INC. | 7.94% | 8.8M | -1,751 (-0.02%) | Jun 30, 2026 |
PERCEPTIVE ADVISORS LLC | 7.50% | 8.3M | +50,000 (+0.60%) | Jun 30, 2026 |
TCG CROSSOVER MANAGEMENT, LLC | 5.62% | 6.2M | 0 (0.00%) | Jun 30, 2026 |
VANGUARD GROUP INC | 5.22% | 5.8M | +531,162 (+9.15%) | Dec 31, 2025 |
COMMODORE CAPITAL LP | 5.08% | 5.7M | 0 (0.00%) | Jun 30, 2026 |
N/A | 4.71% | 5.2M | +5.2M (+100.00%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FIDELITY SECURITIES FUND | 4.07% | 4.5M | +119,627 (+2.64%) | Apr 30, 2026 |
VANGUARD INDEX FUNDS | 3.63% | 4.0M | +39,649 (+0.98%) | Mar 31, 2026 |
FIDELITY ADVISOR SERIES VII | 2.83% | 3.1M | 0 (0.00%) | Apr 30, 2026 |
FIDELITY SELECT PORTFOLIOS | 2.50% | 2.8M | -122,400 (-4.41%) | May 31, 2026 |
MUTUAL FUND SERIES TRUST | 1.36% | 1.5M | 0 (0.00%) | Mar 31, 2026 |
FRANKLIN STRATEGIC SERIES | 1.26% | 1.4M | +418,202 (+29.86%) | Apr 30, 2026 |
FIDELITY CAPITAL TRUST | 1.12% | 1.2M | +162,983 (+13.05%) | Apr 30, 2026 |
Current Ownership Distribution
- Institutions1.2B (81.62%)
- Mutual Funds238.2M (16.87%)
- Insiders21.4M (1.52%)
- Other0 (0.00%)
Insider Transactions
- 1.52% (21.4M)Current InsiderOwnership (%, shares)
- 1Number of InsiderBuying (last 12 months)
- $684,750.00Amount of InsiderBuying (last 12 months)
- 5Number of InsiderSelling (last 12 months)
- $480.1MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Klee Justin B. Co-Chief Executive Officer | Award | Aug 18, 2026 | $0.00 | 60,039 | $0.00 | 3.6M |
Mazzariello Gina Chief Legal Officer | Award | Aug 18, 2026 | $0.00 | 21,284 | $0.00 | 200,374 |
FRATES JAMES M Chief Financial Officer | Award | Aug 18, 2026 | $0.00 | 22,807 | $0.00 | 244,435 |
Cohen Joshua B Co-Chief Executive Officer | Award | Aug 18, 2026 | $0.00 | 60,039 | $0.00 | 3.6M |
Mazzariello Gina Chief Legal Officer | Sell | Jul 10, 2026 | $264,121.50 | 15,000 | $17.61 | 179,090 |
Mazzariello Gina Chief Legal Officer | Sell | Jul 09, 2026 | $274,746.00 | 15,000 | $18.32 | 194,090 |
FRATES JAMES M Chief Financial Officer | Award | Mar 05, 2026 | $0.00 | 143,985 | $0.00 | 143,985 |
Mazzariello Gina Chief Legal Officer | Award | Mar 05, 2026 | $0.00 | 111,990 | $0.00 | 111,990 |
Cohen Joshua B Co-Chief Executive Officer | Award | Mar 05, 2026 | $0.00 | 373,295 | $0.00 | 373,295 |
Klee Justin B. Co-Chief Executive Officer | Award | Mar 05, 2026 | $0.00 | 373,295 | $0.00 | 373,295 |
FRATES JAMES M Chief Financial Officer | Award | Mar 05, 2026 | $0.00 | 95,990 | $0.00 | 261,628 |
Mazzariello Gina Chief Legal Officer | Award | Mar 05, 2026 | $0.00 | 74,660 | $0.00 | 209,090 |
Cohen Joshua B Co-Chief Executive Officer | Award | Mar 05, 2026 | $0.00 | 248,865 | $0.00 | 3.6M |
Klee Justin B. Co-Chief Executive Officer | Award | Mar 05, 2026 | $0.00 | 248,865 | $0.00 | 3.6M |
Mazzariello Gina Chief Legal Officer | Sell | Mar 02, 2026 | $99,378.30 | 6,844 | $14.52 | 134,430 |
Klee Justin B. Co-Chief Executive Officer | Sell | Feb 02, 2026 | $227,617.50 | 15,500 | $14.69 | 3.4M |
Cohen Joshua B Co-Chief Executive Officer | Sell | Feb 02, 2026 | $227,592.70 | 15,500 | $14.68 | 3.4M |
FRATES JAMES M Chief Financial Officer | Sell | Feb 02, 2026 | $52,096.89 | 3,557 | $14.65 | 173,547 |
Mazzariello Gina Chief Legal Officer | Sell | Feb 02, 2026 | $50,515.61 | 3,448 | $14.65 | 144,693 |
Klee Justin B. Co-Chief Executive Officer | Exempt | Jan 16, 2026 | $21,551.79 | 2,847 | $7.57 | 3.4M |
Klee Justin B. Co-Chief Executive Officer | Sell | Jan 16, 2026 | $27,701.17 | 1,995 | $13.89 | 3.4M |
Klee Justin B. Co-Chief Executive Officer | Exempt | Jan 16, 2026 | $0.00 | 2,847 | $0.00 | 0 |
Klee Justin B. Co-Chief Executive Officer | Exempt | Jan 15, 2026 | $1.5M | 197,153 | $7.57 | 3.5M |
Klee Justin B. Co-Chief Executive Officer | Sell | Jan 15, 2026 | $1.8M | 136,193 | $13.58 | 3.4M |
Klee Justin B. Co-Chief Executive Officer | Exempt | Jan 15, 2026 | $0.00 | 197,153 | $0.00 | 2,847 |
MILNE GEORGE M JR | Gift | Jan 12, 2026 | $0.00 | 17,780 | $0.00 | 812,881 |
Klee Justin B. Co-Chief Executive Officer | Sell | Jan 06, 2026 | $85,589.44 | 7,715 | $11.09 | 3.3M |
Cohen Joshua B Co-Chief Executive Officer | Sell | Jan 06, 2026 | $85,596.38 | 7,715 | $11.09 | 3.3M |
FRATES JAMES M Chief Financial Officer | Sell | Jan 06, 2026 | $36,953.86 | 3,326 | $11.11 | 177,104 |
Firestone Karen | Buy | Dec 23, 2025 | $100,845.00 | 8,100 | $12.45 | 63,100 |