Amylyx CFO sells 10,810 shares for taxes
Amylyx Pharmaceuticals’ CFO reported automatic sales of shares to cover tax withholding from performance stock unit vesting.
Rhea-AI Filing Summary
Amylyx Pharmaceuticals, Inc. (AMLX) reported that its Chief Financial Officer, James M. Frates, sold a total of 10,810 shares of common stock on September 10, 2026 in open-market transactions. According to the company’s disclosure, these sales were automatically executed to cover tax withholding obligations arising from the vesting of performance stock units and were not made at the CFO’s discretion.
The filing also notes various trusts for which Mr. Frates serves as trustee hold Amylyx shares, with Mr. Frates disclaiming beneficial ownership except to the extent of any pecuniary interest. No Rule 10b5-1 trading plan is reported for these transactions.
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Insights
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Insider Trade Summary
Net Seller: 10,810 shares
Net Sell
6 txns
Insider
FRATES JAMES M
Role
Chief Financial Officer
Sold
10,810 shs ($350K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock F1, F2 | 9,768 | $32.2681 | $315K |
| Sale | Common Stock F1, F3 | 1,042 | $33.2302 | $35K |
| holding | Common Stock F4 | -- | -- | -- |
| holding | Common Stock F5 | -- | -- | -- |
| holding | Common Stock F6 | -- | -- | -- |
| holding | Common Stock F7 | -- | -- | -- |
Holdings After Transaction:
Common Stock — 233,625 shares (Direct);
Common Stock — 166,531 shares (Indirect, By Trust)
Footnotes (7)
- F1. Represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of performance stock units. Such sales were automatic and not at the discretion of the Reporting Person.
- F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.805 to $32.71. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
- F3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.84 to $33.45. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
- F4. Shares held by the JAMES M. FRATES 2025 GRAT NO 1 U/A DTD 12/12/2025, for which the Reporting Person serves as trustee and is the sole annuitant. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
- F5. Shares held by the James M. Frates 2024 Grantor Retained Annuity Trust No. 1, for which the Reporting Person serves as trustee and is the sole annuitant. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
- F6. Shares held by the FRATES FAMILY 2013 IRREV TRUST, for which the Reporting Person serves as trustee. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
- F7. Shares held by the JAMES M. FRATES 2026 GRANTOR RETAINED ANNUITY TRUST NO. 1, for which the Reporting Person serves as trustee and is the sole annuitant. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
Key Figures
Shares sold (block 1): 9,768 shares
Weighted average price (block 1): $32.2681 per share
Shares sold (block 2): 1,042 shares
+2 more
5 metrics
Shares sold (block 1)
9,768 shares
Common stock sold September 10, 2026 to cover tax withholding
Weighted average price (block 1)
$32.2681 per share
First sale block, trades from $31.805 to $32.71
Shares sold (block 2)
1,042 shares
Common stock sold September 10, 2026 to cover tax withholding
Weighted average price (block 2)
$33.2302 per share
Second sale block, trades from $32.84 to $33.45
Total shares sold
10,810 shares
Net shares sold by CFO on September 10, 2026
Key Terms
performance stock units, weighted average price, Grantor Retained Annuity Trust, pecuniary interest
4 terms
performance stock units financial
"tax withholding obligations in connection with the vesting of performance stock units"
Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Grantor Retained Annuity Trust financial
"James M. Frates 2024 Grantor Retained Annuity Trust No. 1"
A grantor retained annuity trust (GRAT) is an estate-planning tool where the person who creates the trust transfers assets into it but receives fixed cash payments (an annuity) from the trust for a set number of years; whatever remains after that term passes to designated beneficiaries. It matters to investors because it can shift future appreciation of assets out of the creator’s taxable estate—like putting an asset into a timed vending machine that pays you fixed amounts while any extra value that grows inside the machine goes to heirs with reduced gift or estate tax consequences.
pecuniary interest financial
"disclaims beneficial ownership ... except to the extent of his pecuniary interest"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did AMLX report for CFO James M. Frates on September 10, 2026?
Amylyx Pharmaceuticals reported that CFO James M. Frates sold 10,810 shares of common stock on September 10, 2026 in two open-market transactions at weighted average prices around $32–$33 per share.
Were the AMLX CFO’s September 10, 2026 stock sales under a Rule 10b5-1 plan?
No. The filing’s Rule 10b5-1 checkbox is not marked as being made under such a plan, and the footnotes describe the trades as automatic sales to cover tax withholding from performance stock unit vesting.
AI-generated analysis. How Rhea-AI works. Not financial advice.
