Constellium files Form 144 for Common Stock sale

Constellium SE submitted a Form 144 notice related to Common Stock, using J.P.

Accepted by SEC EDGAR 03/09/2026 - 03:53 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Constellium SE submitted a Form 144 notice related to Common Stock, using J.P. Morgan Securities LLC as broker on 03/09/2026.

The filing lists equity compensation entries with share counts: 7,106 (RSU issuance, 07/31/2020), 4,842 (RSU issuance, 03/10/2025) and 5,753 (PSU issuance, 03/10/2025), each shown with an as of 03/06/2026 date. The excerpt also shows 137,801,779 shares outstanding as of 03/09/2026.

FAQ

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

What does the Constellium (CSTM) Form 144 filing disclose?

It discloses a resale notice for Common Stock through J.P. Morgan Securities dated 03/09/2026. The filing cites equity compensation entries of 7,106, 4,842, and 5,753 shares with 03/06/2026 dates.

How many shares does the excerpt show outstanding for Constellium (CSTM)?

The excerpt shows 137,801,779 shares outstanding as of 03/09/2026. This figure appears alongside the filing header and date in the provided content.

Which broker-dealer is listed on the Constellium Form 144?

The filing lists J.P. Morgan Securities LLC at 270 Park Ave, New York. That broker-dealer is identified in the Form 144 excerpt as handling the proposed transaction.

Which equity awards are identified in the Form 144 excerpt for CSTM?

The excerpt lists equity compensation items: an RSU issuance of 7,106 (07/31/2020), an RSU of 4,842 (03/10/2025), and a PSU of 5,753 (03/10/2025), each dated 03/06/2026 in the table.

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

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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	0002093242
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	Constellum SE
SEC File Number	001-35931
Address of Issuer	300 East Lombard Street Suite 1710 Baltimore MARYLAND 21202
Phone	412-403-3233
Name of Person for Whose Account the Securities are To Be Sold	Nicolas Brun
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	Affiliate

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 Stock	J.P. Morgan Securities LLC 270 Park Ave 10th Floor New York NY 10017	17701	436679.21	137801779	03/09/2026	NYSE

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 Stock	07/31/2020	RSU Issuance	Constellium SE (issuer)			7106	03/06/2026	Equity Compensation
Common Stock	03/10/2025	RSU Issuance	Constellium SE (issuer)			4842	03/06/2026	Equity Compensation
Common Stock	03/10/2025	PSU Issuance	Constellium SE (issuer)			5753	03/06/2026	Equity Compensation

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	03/09/2026
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	J.P. Morgan Securities LLC, Workplace Solutions, as Agent and Attorney in Fact for Nicolas Brun, Constellium SE
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)