Firestone Karen
SEC insider (Form 3/4/5 filer). CIK 0001969821. Director at Amylyx Pharmaceuticals, Inc. (AMLX). 7 reported Form 4/5 transactions since Sep 2024; latest on Aug 31, 2026. Located in CAMBRIDGE, MA.
Companies Firestone Karen has filed insider reports for
- Amylyx Pharmaceuticals, Inc. (AMLX): Director
Firestone Karen
CIK: 0001969821
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Amylyx Pharmaceuticals, Inc.
Discretionary Trading P&L
Holdings
Transaction History (7 total)
- Aug 31, 2026AMLX
Amylyx Pharmaceuticals, Inc.
ExerciseDirect25K shares at avg. $1.76$44K - Aug 31, 2026AMLX
Amylyx Pharmaceuticals, Inc.
ExerciseDirect25K shares at avg. $5.05$126K - Jun 4, 2026AMLX
Amylyx Pharmaceuticals, Inc.
AwardDirectStock Option (right to buy)
24.4K shares- - May 21, 2026AMLX
Amylyx Pharmaceuticals, Inc.
PurchaseDirect3.8K shares at avg. $13.51$51K - Dec 23, 2025AMLX
Amylyx Pharmaceuticals, Inc.
PurchaseDirect8.1K shares at avg. $12.45$101K - Jun 5, 2025AMLX
Amylyx Pharmaceuticals, Inc.
AwardDirectStock Option (right to buy)
25K shares- - Sep 5, 2024AMLX
Amylyx Pharmaceuticals, Inc.
PurchaseDirect50K shares at avg. $2.13$107K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 31, 2026 | AMLX Amylyx Pharmaceuticals, Inc. | Exercise | 25,000 | $1.76 | $44,000 | Direct |
| Aug 31, 2026 | AMLX Amylyx Pharmaceuticals, Inc. | Exercise | 25,000 | $5.05 | $126,250 | Direct |
| Jun 4, 2026 | AMLX Amylyx Pharmaceuticals, Inc. | Award Stock Option (right to buy) | 24,372 | - | - | Direct |
| May 21, 2026 | AMLX Amylyx Pharmaceuticals, Inc. | Purchase | 3,800 | $13.51 | $51,338 | Direct |
| Dec 23, 2025 | AMLX Amylyx Pharmaceuticals, Inc. | Purchase | 8,100 | $12.45 | $100,845 | Direct |
| Jun 5, 2025 | AMLX Amylyx Pharmaceuticals, Inc. | Award Stock Option (right to buy) | 25,000 | - | - | Direct |
| Sep 5, 2024 | AMLX Amylyx Pharmaceuticals, Inc. | Purchase | 50,000 | $2.13 | $106,590 | Direct |
1-7 of 7 transactions