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Of the 11 tracked institutions holding AMLX, 3 have a 3-year clone track record — 3 of them beat the S&P. Average holder's clone alpha: +4.1pt. It's a gauge of who owns the name, not just how many.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Among the 11 tracked institutional investors we monitor, AMLX (AMYLYX PHARMACEUTICALS INC) is held with a combined value of $624.16M across 36,760,846 shares. The largest holder is FMR LLC with a position worth $300.43M (0.01% of their portfolio). Magnetar Financial LLC opened a new position in the most recent quarter. 5 funds increased their holdings. 5 funds reduced their position.
Total Institutional Value
$624.16M
Total Shares Held
36,760,846
Institutional Holders
11
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $300.43M | 0.01% | +0.6% |
| 2 | BlackRock, Inc. | $158.53M | 0.00% | -0.0% |
| 3 | VANGUARD GROUP INC | $70.12M | 0.00% | +10.1% |
| 4 | STATE STREET CORP | $46.76M | 0.00% | +10.2% |
| 5 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $34.12M | 0.05% | -46.6% |
| 6 | TWO SIGMA ADVISERS, LP | $3.97M | 0.01% | +129.7% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $3.82M | 0.00% | -11.9% |
| 8 | CITADEL ADVISORS LLC | $3.21M | 0.00% | -56.6% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $2.61M | 0.00% | +19.5% |
| 10 | AQR CAPITAL MANAGEMENT LLC | $373.91K | 0.00% | -28.4% |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of AMLX with a position worth $300.43M, representing 0.01% of their portfolio. In total, 11 institutional investors hold AMLX with a combined value of $624.16M.
In the most recent quarter, 1 fund opened a new position in AMLX. Additionally, 5 increased their holdings and 5 reduced their positions.
Institutional investors hold $624.16M worth of AMLX stock across 11 positions. The largest institutional holder is FMR LLC with $300.43M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For AMLX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their AMLX positions.
Last Close
$29.03
2026-10-21
YTD
+154.2%
62% of 52-week range