AMLX
Amylyx Pharmaceuticals, Inc.Company with tickers: AMLX
CIK
1658551
CUSIP
03237H101
Shares Outstanding
111,186,317
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Holders: 1
Total Value: $208
Total Shares: 15
Institutional Ownership Trend
Holder Concentration
Across 1 13F filers · Δ vs Dec 31, 2025Top Holder
100.0%
+84.0 pts
Top 5
100.0%
+55.7 pts
Top 10
100.0%
+38.1 pts
HHI
10,000
Highly concentrated
+9,431
Quarterly Activity
vs Dec 31, 2025
New
0
Increased
0
Decreased
1
Sold Out
178
Unchanged
0
Holder count:
-178
Institutional value:
-100.0%
Shares held:
-100.0%
Top Buyers
vs Dec 31, 2025No qualifying movers this quarter.
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds |
|---|---|---|
| Small Essential Partners LLC | −2 | 15 |
Top New Positions
vs Dec 31, 2025No new positions this quarter.
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) |
|---|---|---|
| Mega FMR LLC | 16,518,419 | $199,542,498 |
| Mega BlackRock, Inc. | 9,054,431 | $109,377,522 |
| Mid PERCEPTIVE ADVISORS LLC | 8,284,882 | $100,081,374 |
| Mid TCG Crossover Management, LLC | 6,243,812 | $75,425,248 |
| Mid COMMODORE CAPITAL LP | 5,650,000 | $68,252,000 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Action | |
|---|---|---|---|---|---|---|---|---|
| Small Essential Partners LLC | $208 | 100.00% | 15 | Shares | Sole | 2026-05-21 | View | |
| No holders match your search. | ||||||||