AMLX files Form 144 to sell 10,250 RSU shares

AMLX reports a proposed sale of Common stock tied to the vesting of Restricted Stock Units, totaling 10,250 shares with an anticipated action date of 02/23/2026.

Rhea-AI Filing Summary

AMLX reports a proposed sale of Common stock tied to the vesting of Restricted Stock Units, totaling 10,250 shares with an anticipated action date of 02/23/2026. The filing also records that Gina Mazzariello sold 3,448 shares on 02/02/2026.

Insights

Corporate Governance Analyst

Form 144 lists a planned sale of vested RSUs and a recent smaller disposition.

The filing states 10,250 Common shares are to be sold associated with the vesting of Restricted Stock Units on 02/23/2026. This describes a scheduled disposal tied to vesting rather than an open‑market, discretionary purchase.

Cash‑flow treatment is not specified in the excerpt; subsequent filings or trade reports may show whether sales occur via brokered transactions. The earlier reported sale of 3,448 shares on 02/02/2026 is recorded as a past disposition by Gina Mazzariello.

FAQ

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

What does AMLX's Form 144 disclose about the RSU vesting?

The filing discloses a planned sale of 10,250 Common shares tied to RSU vesting on 02/23/2026. These shares are described as the result of the vesting of Restricted Stock Units, with the filing listing the sale method as issuer-related.

Who sold shares recently according to the AMLX excerpt?

Gina Mazzariello is listed as having sold 3,448 Common shares on 02/02/2026. That transaction appears under “Securities Sold During The Past 3 Months” in the provided excerpt.

Does the Form 144 excerpt state how the RSU-related shares will be sold?

The excerpt ties the 10,250 share sale to the vesting of Restricted Stock Units and labels the counterparty as Issuer. Specific distribution methods or broker details are not provided in the excerpt.

Are there outstanding share counts or other context numbers in the excerpt?

The excerpt includes numeric entries (for example 3419, 48352, 141274) and an address, but it does not explicitly label any of those as shares outstanding in the provided lines.

What is the effective date tied to the proposed sale in the AMLX excerpt?

The proposed sale tied to RSU vesting is dated 02/23/2026. That date is listed alongside the 10,250 share amount in the “Securities To Be Sold” section.

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

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Accepted by SEC EDGAR 02/23/2026 - 04:25 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	3419	48352	141274	02/23/2026	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	02/23/2026	Vesting of Restricted Stock Units	Issuer			10250	02/23/2026	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

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	02/23/2026
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)