Justin B. Klee plans Rule 144 sale of 15,500 shares

Justin B. Klee has filed a Rule 144 notice to sell 15,500 shares of common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $227,617, to be sold on or about 02/02/2026 on NASDAQ.

Rhea-AI Filing Summary

Justin B. Klee has filed a Rule 144 notice to sell 15,500 shares of common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $227,617, to be sold on or about 02/02/2026 on NASDAQ.

The filing states there are 3,363,898 shares of this class outstanding. The shares to be sold were acquired via vesting of 31,667 restricted stock units from the issuer on 02/02/2026. In the prior three months, Klee sold additional common shares in three transactions totaling several thousand shares.

FAQ

What does Justin B. Klee’s Form 144 filing for AMLX indicate?

The filing indicates Justin B. Klee plans to sell 15,500 AMLX common shares under Rule 144. The planned sale, via Morgan Stanley Smith Barney on NASDAQ, has an aggregate market value of $227,617 based on the figures disclosed.

How many AMLX shares does Justin B. Klee plan to sell and through which broker?

He plans to sell 15,500 common shares of AMLX. The transaction is listed with Morgan Stanley Smith Barney LLC, 1 New York Plaza, as the broker, with the shares to be sold on the NASDAQ exchange.

What is the stated market value of the AMLX shares in this Form 144?

The Form 144 lists an aggregate market value of $227,617 for the 15,500 AMLX common shares. This value comes directly from the securities information table describing the planned Rule 144 sale.

When were the AMLX shares in Justin B. Klee’s Form 144 acquired?

The shares were acquired on 02/02/2026 through the vesting of restricted stock units from the issuer. The table shows 31,667 common shares acquired via RSU vesting with the same 02/02/2026 date of payment marked as N/A.

How many AMLX shares are reported as outstanding in the Form 144 filing?

The securities information table reports 3,363,898 shares of this class outstanding. This figure provides a baseline for the size of the planned 15,500-share sale relative to the total common stock outstanding.

What prior AMLX share sales by Justin B. Klee are disclosed in the last three months?

The filing lists three prior common stock sales: 1,995 shares on 01/16/2026 for $27,701, 136,193 shares on 01/15/2026 for $1,849,869, and 7,715 shares on 01/06/2026 for $85,590, all under the same Cambridge, MA address.

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

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Accepted by SEC EDGAR 02/02/2026 - 04:10 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	0001898314
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	Klee Justin B.
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
Relationship to Issuer	Director

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	15500	227617	3363898	02/02/2026	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	02/02/2026	Vesting of Restricted Stock Units	Issuer			31667	02/02/2026	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
Klee Justin B. 55 Cambridge Parkway Suite 6W Cambridge MA 02142	Common	01/16/2026	1995	27701
Klee Justin B. 55 Cambridge Parkway Suite 6W Cambridge MA 02142	Common	01/15/2026	136193	1849869
Klee Justin B. 55 Cambridge Parkway Suite 6W Cambridge MA 02142	Common	01/06/2026	7715	85590

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	02/02/2026
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)