Amylyx Pharmaceuticals, Inc. AMLX
CIK 0001658551 · CUSIP 03237H101
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | FMR LLC CIK 315066 · View history | $300.43M 16,727,909 shares | 0.01% | +97.37K(+0.6%)Added | SEC filing ↗ Aug 13, 2026 | ▾ |
| 02 | BlackRock, Inc. CIK 2012383 · View history | $158.53M 8,827,085 shares | 0.00% | -1.75K(0.0%)Reduced | SEC filing ↗ Aug 7, 2026 | ▾ |
| 03 | PERCEPTIVE ADVISORS LLC CIK 1224962 · View history | $149.69M 8,334,882 shares | 2.32% | +50.00K(+0.6%)Added | SEC filing ↗ Aug 14, 2026 | ▾ |
| 04 | TCG Crossover Management, LLC CIK 1839948 · View history | $112.14M 6,243,812 shares | 2.70% | 0(0.0%)Unchanged | SEC filing ↗ Aug 14, 2026 | ▾ |
| 05 | Commodore Capital LP CIK 1831942 · View history | $101.47M 5,650,000 shares | 6.04% | 0(0.0%)Unchanged | SEC filing ↗ Aug 14, 2026 | ▾ |
| 06 | Jupiter Topco LLC CIK 2146052 · View history | $94.01M 5,236,102 shares | 0.04% | — | SEC filing ↗ Aug 14, 2026 | ▾ |
| 07 | Saturn V Capital Management LP CIK 1964437 · View history | $83.05M 4,624,101 shares | 11.91% | +274.22K(+6.3%)Added | SEC filing ↗ Aug 14, 2026 | ▾ |
| 08 | VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history | $75.87M 4,224,224 shares | 0.00% | +82.65K(+2.0%)Added | SEC filing ↗ Aug 13, 2026 | ▾ |
| 09 | MORGAN STANLEY CIK 895421 · View history | $56.23M 3,130,808 shares | 0.00% | +955.26K(+43.9%)Added | SEC filing ↗ Aug 13, 2026 | ▾ |
| 10 | Driehaus Capital Management LLC CIK 938206 · View history | $54.54M 3,036,970 shares | 0.32% | +49.82K(+1.7%)Added | SEC filing ↗ Aug 14, 2026 | ▾ |
| 11 | First Light Asset Management, LLC CIK 1600004 · View history | $54.30M 3,023,256 shares | 3.30% | -167.39K(-5.2%)Reduced | SEC filing ↗ Aug 14, 2026 | ▾ |
| 12 | FRANKLIN RESOURCES INC CIK 38777 · View history | $52.99M 2,950,225 shares | 0.01% | +688.66K(+30.5%)Added | SEC filing ↗ Aug 13, 2026 | ▾ |
| 13 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $51.33M 2,858,239 shares | 0.01% | +232.25K(+8.8%)Added | SEC filing ↗ Aug 14, 2026 | ▾ |
| 14 | STATE STREET CORP CIK 93751 · View history | $46.76M 2,603,337 shares | 0.00% | +240.18K(+10.2%)Added | SEC filing ↗ Aug 7, 2026 | ▾ |
| 15 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $41.95M 2,335,315 shares | 0.00% | +124.38K(+5.6%)Added | SEC filing ↗ Aug 12, 2026 | ▾ |
| 16 | JPMORGAN CHASE & CO CIK 19617 · View history | $34.92M 1,863,650 shares | 0.00% | +1.70M(+1067.2%)Added | SEC filing ↗ Aug 12, 2026 | ▾ |
| 17 | ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history | $34.12M 1,900,000 shares | 0.05% | -1.66M(-46.6%)Reduced | SEC filing ↗ Aug 14, 2026 | ▾ |
| 18 | Siren, L.L.C. CIK 2005245 · View history | $26.59M 1,480,586 shares | 0.54% | +250.59K(+20.4%)Added | SEC filing ↗ Aug 13, 2026 | ▾ |
| 19 | EVENTIDE ASSET MANAGEMENT, LLC CIK 1442891 · View history | $23.84M 1,327,536 shares | 0.32% | -186.42K(-12.3%)Reduced | SEC filing ↗ Aug 14, 2026 | ▾ |
| 20 | 683 Capital Management, LLC CIK 1404574 · View history | $22.98M 1,279,512 shares | 2.11% | -250.49K(-16.4%)Reduced | SEC filing ↗ Aug 14, 2026 | ▾ |
Showing 20 / 206 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 206 reporting institutions.
This page includes 20 of 206 reporting institutions. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 206 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP.
MCP https://api.akkrudata.ai/mcp
get_institutional_security_holders
{"cusip":"03237H101","quarter":"2026Q2","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.