Constellium SE (NYSE: CSTM) Form 144 lists 75,874 PSUs and 19,352 RSUs

Rhea-AI Filing Summary

Constellium SE submitted a Form 144 reporting a proposed sale of Common Stock, filed with J.P. Morgan Securities LLC as broker and dated 03/10/2026. The filing lists equity compensation items dated 03/09/2026: a PSU issuance of 75,874 and an RSU issuance of 19,352.

The notice identifies the broker and the equity awards by type and date; cash‑flow treatment and exact sale mechanics are not detailed in the excerpt.

Insights

Equity Compensation Analyst

Form 144 lists brokered resale of equity tied to recent PSU/RSU issuances.

The filing names J.P. Morgan Securities LLC as the broker and records equity compensation events on 03/09/2026—a PSU issuance: 75,874 and an RSU issuance: 19,352. These entries appear as the underlying securities linked to the resale notice.

Timing and proceeds details are not provided in the excerpt; subsequent filings or broker communications may disclose transactions completed under this notice.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	41717	1079349.45	135069771	03/10/2026	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	03/09/2026	PSU Issuance	Constellium SE (issuer)			75874	03/09/2026	Equity Compensation
Common Stock	03/09/2026	RSU Issuance	Constellium SE (issuer)			19352	03/09/2026	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

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Constellium SE's Form 144 (CSTM) report?

The Form 144 reports a proposed sale of Common Stock through J.P. Morgan Securities LLC dated 03/10/2026. It lists equity compensation entries dated 03/09/2026 for 75,874 PSUs and 19,352 RSUs.

Who is the broker listed on the Form 144 for CSTM?

The filing lists J.P. Morgan Securities LLC as the broker. The excerpt does not state the specific sale method or the party receiving proceeds beyond the broker identification.

Are the PSU and RSU amounts being sold or just issued?

The excerpt shows a PSU issuance of 75,874 and an RSU issuance of 19,352 dated 03/09/2026. The Form 144 is a notice of proposed resale; the excerpt does not specify which exact award units will be sold.

Does the filing disclose proceeds or sale mechanics for CSTM?

The provided excerpt does not disclose proceeds, sale price, or detailed sale mechanics. It identifies the broker and lists equity award counts and dates without specifying cash‑flow treatment.

When were the equity compensation items recorded in the filing?

Both equity compensation entries are dated 03/09/2026 in the excerpt: a PSU issuance, 75,874, and an RSU issuance, 19,352. The Form 144 filing date is shown as 03/10/2026.