Transaction · 0001193125-26-380152

Firestone Karen

Firestone Karen, DIR, reported a transaction classified as exercise at Amylyx Pharmaceuticals, Inc. involving 25000.000000 shares for an estimated $44000.00. Reported holdings after the transaction were 91900.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

exerciseSEC transaction code MDIR
AMLXAmylyx Pharmaceuticals, Inc.
Filing timeSep 02
Trade dateAug 31, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$33.81
Pre-filing
1mo ago -40.0%1w ago +12.8%1d ago +2.8%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

AMLX price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
AMLX since 2026-09-02Filed yesterday · 1 day of post-filing data
Loading…
Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
exercise
Code M
Identifier
0001193125-26-380152
Common Stock
Transaction date
Aug 31, 2026
Filed Sep 02, 2026, 08:00 PM · 2d delay
Shares
25.0k sh
$176 per share
Estimated value
$4.40M
Computed from shares × price
Holdings after
91.9k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership Large Holdings Increase
+10score
Filing-only score

+10

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    This option is fully vested and exercisable.

Original filing · 0001193125-26-380152
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

AMLX