683 Capital Management, LLC
Position in AMLX — Amylyx Pharmaceuticals, Inc.
CIK 1404574
NEW YORK, NY
Position in AMLX
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$21,267,000
+$1,335,000 QoQ
Shares Held
1,530,000
-7.3% QoQ
Ownership
1.38%
of shares outstanding
% of Portfolio
2.15%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2022
10 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AMLX Over Time
Shares Held
Position Value (USD)
Derivatives in AMLX
reported options exposure · as of Mar 31, 2026CallValue
$1,342,740
CallShares
96,600
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Mar 31, 2026683 Capital Management, LLC holds $21,267,000 across 1 Drug Manufacturers - Specialty & Generic name. AMLX ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | AMLX |
Amylyx Pharmaceuticals, Inc.
This page
|
1,530,000 | $21,267,000 |
All Filings in AMLX
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11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,342,740 | 96,600 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $21,267,000 | 1,530,000 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $19,932,000 | 1,650,000 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $23,918,400 | 1,760,000 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $13,845,600 | 2,160,000 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $8,536,356 | 2,411,400 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $7,295,400 | 1,930,000 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $6,480,000 | 2,000,000 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $2,853,554 | 1,501,871 | Shares | Defined | 2024-08-14 | |
| 2022-06-30 | $13,052,771 | 677,714 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $8,708,624 | 677,714 | Shares | Defined | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||