AMLX Form 144: 20,545 RSUs Vest; Insider Sales

AMLX reports a Form 144 disclosure covering recent transactions in its common stock.

Rhea-AI Filing Summary

AMLX reports a Form 144 disclosure covering recent transactions in its common stock. The issuer recorded the vesting of 20,545 restricted stock units on 03/02/2026. The filing also lists two sales by Gina Mazzariello of 3,448 shares on 02/02/2026 and 3,419 shares on 02/23/2026.

Insights

Securities Compliance Counsel

Routine Form 144 notice documenting RSU vesting and two small sales.

The filing records the issuer's vesting of 20,545 restricted stock units on 03/02/2026 and two reported sales by Gina Mazzariello totaling 6,867 shares in February 2026. The trades are presented as disclosed transactions under resale notice requirements.

Impact appears procedural: this notice documents planned or completed sales rather than material corporate change. Subsequent public filings or disclosures would state if proceeds or further insider activity affect capital structure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What transactions does AMLX disclose in this Form 144?

The filing shows the vesting of 20,545 RSUs on 03/02/2026 and two sales by Gina Mazzariello of 3,448 and 3,419 shares. The items are listed as common stock transactions with transaction dates provided.

Who reported the sales listed in AMLX's Form 144?

The sales are reported for Gina Mazzariello, with addresses listed in the filing. The reported sale amounts are 3,448 shares on 02/02/2026 and 3,419 shares on 02/23/2026, respectively.

Did AMLX disclose any issuer-side stock actions in the filing?

Yes; the filing records the issuer-side vesting of 20,545 restricted stock units on 03/02/2026. That vesting is shown under Securities To Be Sold as an issuer event in the document.

Are the securities involved common stock and where are they listed?

The transactions involve AMLX common stock, and the filing references trading on NASDAQ. Each line item labels the security class and includes the reported transaction dates.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/02/2026 - 04:30 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001913765
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Amylyx Pharmaceuticals, Inc.
SEC File Number	001-41199
Address of Issuer	55 Cambridge Parkway Suite 6W Cambridge MASSACHUSETTS 02142
Phone	617-682-0917
Name of Person for Whose Account the Securities are To Be Sold	Mazzariello Gina
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC 1 New York Plaza 8th Floor New York NY 10004	6844	99379	134430	03/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/02/2026	Vesting of Restricted Stock Units	Issuer			20545	03/02/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Mazzariello Gina 55 Cambridge Parkway Suite 6W Cambridge MA 02142	Common	02/02/2026	3448	50515
Mazzariello Gina 55 Cambridge Parkway Suite 6W Cambridge MA 02142	Common	02/23/2026	3419	48352

144: Remarks and Signature

Remarks	This sale represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. Such sales were automatic and not at the discretion of the Reporting Person.
Date of Notice	03/02/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Joshua B. Cohen, as Attorney in Fact
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)