Amylyx Pharmaceuticals, Inc. (AMLX)
Amylyx Pharmaceuticals, Inc. (AMLX) Insider Trading
Directors, officers and holders of more than 10% of AMLX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 125 transactions on file: 1 with code P, 24 with code S and 25 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 5, 2026 | MILNE GEORGE M JR | Director | S Sale | 30,000 | $27.70 | $830,904 |
| Sep 10, 2026 | FRATES JAMES M | Chief Financial Officer | S Sale | 9,768 | $32.27 | $315,195 |
| Sep 10, 2026 | Klee Justin B. | Co-Chief Executive Officer | S Sale | 29,025 | $32.13 | $932,553 |
| Sep 10, 2026 | Bedrosian Camille L | Chief Medical Officer | S Sale | 7,947 | $32.21 | $256,004 |
| Sep 10, 2026 | Bedrosian Camille L | Chief Medical Officer | S Sale | 2,081 | $33.09 | $68,864 |
| Sep 10, 2026 | Klee Justin B. | Co-Chief Executive Officer | S Sale | 1,439 | $33.16 | $47,710 |
| Sep 10, 2026 | FRATES JAMES M | Chief Financial Officer | S Sale | 1,042 | $33.23 | $34,626 |
| Sep 10, 2026 | Cohen Joshua B | Co-Chief Executive Officer | S Sale | 29,545 | $32.16 | $950,040 |
| Sep 10, 2026 | Cohen Joshua B | Co-Chief Executive Officer | S Sale | 919 | $33.15 | $30,464 |
| Sep 10, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 9,525 | $32.46 | $309,140 |
| Sep 10, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 11 | $33.34 | $367 |
| Aug 31, 2026 | Firestone Karen | Director | M Exercise | 25,000 | Not measured | Not measured |
| Aug 31, 2026 | Firestone Karen | Director | M Exercise | 25,000 | $5.05 | $126,250 |
| Aug 31, 2026 | Firestone Karen | Director | M Exercise | 25,000 | $1.76 | $44,000 |
| Aug 31, 2026 | Firestone Karen | Director | M Exercise | 25,000 | Not measured | Not measured |
| Aug 18, 2026 | Mazzariello Gina | Chief Legal Officer | A Award | 21,284 | Not measured | Not measured |
| Aug 18, 2026 | Cohen Joshua B | Co-Chief Executive Officer | A Award | 60,039 | Not measured | Not measured |
| Aug 18, 2026 | Klee Justin B. | Co-Chief Executive Officer | A Award | 60,039 | Not measured | Not measured |
| Aug 18, 2026 | FRATES JAMES M | Chief Financial Officer | A Award | 22,807 | Not measured | Not measured |
| Aug 18, 2026 | Bedrosian Camille L | Chief Medical Officer | A Award | 22,807 | Not measured | Not measured |
| Jul 10, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 15,000 | $17.61 | $264,122 |
| Jul 9, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 15,000 | $18.32 | $274,746 |
| Jun 4, 2026 | MILNE GEORGE M JR | Director | A Award | 24,372 | Not measured | Not measured |
| Jun 4, 2026 | Zeiher Bernhardt G | Director | A Award | 24,372 | Not measured | Not measured |
| Jun 4, 2026 | Quimi Daphne | Director | A Award | 24,372 | Not measured | Not measured |
| Jun 4, 2026 | Firestone Karen | Director | A Award | 24,372 | Not measured | Not measured |
| Jun 4, 2026 | FONTEYNE PAUL R. | Director | A Award | 24,372 | Not measured | Not measured |
| May 21, 2026 | Firestone Karen | Director | P Purchase | 3,800 | $13.51 | $51,338 |
| Mar 5, 2026 | Klee Justin B. | Co-Chief Executive Officer | A Award | 373,295 | Not measured | Not measured |
| Mar 5, 2026 | Cohen Joshua B | Co-Chief Executive Officer | A Award | 373,295 | Not measured | Not measured |
| Mar 5, 2026 | Bedrosian Camille L | Chief Medical Officer | A Award | 143,985 | Not measured | Not measured |
| Mar 5, 2026 | FRATES JAMES M | Chief Financial Officer | A Award | 143,985 | Not measured | Not measured |
| Mar 5, 2026 | Bedrosian Camille L | Chief Medical Officer | A Award | 95,990 | Not measured | Not measured |
| Mar 5, 2026 | Klee Justin B. | Co-Chief Executive Officer | A Award | 248,865 | Not measured | Not measured |
| Mar 5, 2026 | FRATES JAMES M | Chief Financial Officer | A Award | 95,990 | Not measured | Not measured |
| Mar 5, 2026 | Cohen Joshua B | Co-Chief Executive Officer | A Award | 248,865 | Not measured | Not measured |
| Mar 5, 2026 | Mazzariello Gina | Chief Legal Officer | A Award | 74,660 | Not measured | Not measured |
| Mar 5, 2026 | Mazzariello Gina | Chief Legal Officer | A Award | 111,990 | Not measured | Not measured |
| Mar 2, 2026 | FRATES JAMES M | Chief Financial Officer | S Sale | 7,909 | $14.52 | $114,851 |
| Mar 2, 2026 | Bedrosian Camille L | Chief Medical Officer | S Sale | 6,461 | $14.58 | $94,205 |
| Mar 2, 2026 | Cohen Joshua B | Co-Chief Executive Officer | S Sale | 29,282 | $14.48 | $424,120 |
| Mar 2, 2026 | Klee Justin B. | Co-Chief Executive Officer | S Sale | 29,282 | $14.47 | $423,760 |
| Mar 2, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 6,844 | $14.52 | $99,378 |
| Feb 23, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 3,419 | $14.14 | $48,352 |
| Feb 2, 2026 | Klee Justin B. | Co-Chief Executive Officer | S Sale | 15,500 | $14.69 | $227,618 |
| Feb 2, 2026 | Mazzariello Gina | Chief Legal Officer | S Sale | 3,448 | $14.65 | $50,516 |
| Feb 2, 2026 | Cohen Joshua B | Co-Chief Executive Officer | S Sale | 15,500 | $14.68 | $227,593 |
| Feb 2, 2026 | FRATES JAMES M | Chief Financial Officer | S Sale | 3,557 | $14.65 | $52,097 |
| Jan 16, 2026 | Cohen Joshua B | Co-Chief Executive Officer | M Exercise | 2,818 | $7.57 | $21,332 |
| Jan 16, 2026 | Cohen Joshua B | Co-Chief Executive Officer | S Sale | 1,974 | $13.83 | $27,299 |
The full Form 4 history is on the AMLX company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.