Constellium SE (CSTM) insider sales: 7,200 shares listed, 1,500 proposed

Rhea-AI Filing Summary

Constellium SE reports proposed insider sale notice under Form 144 by Stephane Corre. The filing lists 1,500 shares of Common Stock tied to an RSU issuance with an allocation date of 04/01/2022 and an offer date of 03/04/2026. The filing also lists prior dispositions: 1,000 shares on 12/01/2025 (proceeds 16900), 3,200 shares on 02/25/2026 (proceeds 82260), and 3,000 shares on 02/27/2026 (proceeds 74066).

Insights

Corporate Governance Analyst

Routine Form 144 notice showing proposed and recent insider dispositions.

The filing lists a proposed sale of 1,500 shares of Common Stock associated with an RSU issuance dated 04/01/2022 and several recent sales totaling 7,200 shares across three dates in 12/01/2025 and 02/25/2026-02/27/2026.

These entries are administrative disclosures of proposed and completed dispositions; cash‑flow treatment and any trading plan reference are not included in the excerpt. Subsequent filings or confirmations would state execution details and buyer/currency information.

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	1500	38828.48	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	04/01/2022	RSU Issuance	Constellium SE (issuer)			1500	03/04/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Stephane Corre 14 TER Rue du docteur Teilhol Aubiere I0 63170	Class A Shares	12/01/2025	1000	16900
Stephane Corre 14 TER Rue du docteur Teilhol Aubiere I0 63170	Class A Shares	02/25/2026	3200	82260
Stephane Corre 14 TER Rue du docteur Teilhol Aubiere I0 63170	Class A Shares	02/27/2026	3000	74066

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 filed under CSTM show?

It shows a proposed sale notice and recent insider sales. The filing lists a proposed sale of 1,500 Common Stock shares (RSU issuance) and prior dispositions of 1,000, 3,200, and 3,000 shares on the dates provided.

Who is the reporting person in the Form 144 for CSTM?

The reporting person is Stephane Corre. The excerpt lists Stephane Corre's address and multiple transactions dated 12/01/2025, 02/25/2026, and 02/27/2026 with recorded share amounts and proceeds.

How many shares were sold in recent transactions listed in the filing?

The filing shows recent sales totaling 7,200 shares. Those are 1,000 on 12/01/2025, 3,200 on 02/25/2026, and 3,000 on 02/27/2026, with proceeds shown per row.

Are proceeds reported for the sales in the Form 144 excerpt?

Yes, proceeds appear in each sale row. The excerpt lists proceeds as 16900, 82260, and 74066 corresponding to the 1,000; 3,200; and 3,000 share dispositions respectively.

Does the Form 144 excerpt state how the proposed 1,500 shares will be sold?

The excerpt identifies the 1,500 shares as tied to an RSU issuance with dates, but it does not specify the method of sale or cash‑flow treatment for the proposed disposition in the provided text.