Officer resale notice: Constellium SE (NYSE: CSTM) 5,000 shares via J.P. Morgan

Rhea-AI Filing Summary

Constellium SE filed a Form 144 notice regarding 5,000 shares of Common Stock. The filing lists J.P. Morgan Securities LLC as the broker and shows a monetary figure 160,207.94 alongside an identifier 135,069,771 and the date 05/01/2026. The excerpt also records prior Class A share sales by Stephane Corre on 03/10/2026 (1,500 shares), 02/25/2026 (3,200 shares) and 02/27/2026 (3,000 shares). The filing lists equity compensation items: RSU 1,871 and PSU 3,129 grants dated 04/01/2022.

Key Figures

Noticed shares: 5,000 shares Monetary figure listed: 160,207.94 Identifier / figure: 135,069,771 +5 more

8 metrics

Noticed shares 5,000 shares Common Stock entry associated with J.P. Morgan Securities LLC

Monetary figure listed 160,207.94 figure shown on the same line as the 5,000-share entry dated 05/01/2026

Identifier / figure 135,069,771 numeric field appearing with the 5,000-share line and date 05/01/2026

RSUs granted 1,871 RSUs Equity compensation entry dated 04/01/2022

PSUs granted 3,129 PSUs Equity compensation entry dated 04/01/2022

Prior sale — 02/25/2026 3,200 shares Class A Shares sale by Stephane Corre on 02/25/2026

Prior sale — 02/27/2026 3,000 shares Class A Shares sale by Stephane Corre on 02/27/2026

Prior sale — 03/10/2026 1,500 shares Class A Shares sale by Stephane Corre on 03/10/2026

Key Terms

Form 144, RSU, PSU, Class A Shares

4 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

RSU financial

"RSU | Constellium SE (issuer) | 1,871"

Restricted stock units (RSUs) are a form of company shares given to employees as part of their compensation, usually with certain restrictions or conditions, such as remaining with the company for a set period. When these restrictions lift, employees receive actual shares that they can sell or hold. For investors, RSUs can impact a company's stock supply and reflect the company's commitment to attracting and retaining talent.

PSU financial

"PSU | Constellium SE (issuer) | 3,129"

A PSU is a company where the government owns a controlling stake and often plays a direct role in its management and strategy. Think of it like a business that operates with public oversight, similar to a town-run utility versus a private neighborhood service. Investors watch PSUs differently because government involvement can affect profits, dividend policies, regulatory treatment and stability, so these stocks may behave more like policy instruments than pure market-driven enterprises.

Class A Shares market

"Stephane Corre ... | Class A Shares | 03/10/2026"

Class A shares are one of a company’s distinct types of stock that come with a specific set of rights—commonly different voting power, dividend treatment, or transfer rules—defined in the company’s charter. Investors care because those rights affect control, income and resale value; like holding a seat at a table that has different rules or stronger chips than other seats, owning Class A changes how much influence and return you can expect.

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	5000	160207.94	135069771	05/01/2026	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	04/01/2022	RSU	Constellium SE (issuer)			1871	04/01/2022	equity compensation
Common	04/01/2022	PSU	Constellium SE (issuer)			3129	04/01/2022	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	03/10/2026	1500	38828.48
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's (CSTM) Form 144 show?

It shows a notice to sell 5,000 shares of Common Stock via J.P. Morgan. The filing includes a monetary figure 160,207.94, an identifier 135,069,771, and the date 05/01/2026, plus prior Class A share sales listed by Stephane Corre.

Who is the broker named on the CSTM Form 144?

J.P. Morgan Securities LLC is named as the broker-dealer. The filing lists the broker's address at 270 Park Ave, New York, and associates the broker with the 5,000-share Common Stock entry and the 05/01/2026 line.

What prior sales are disclosed in the excerpt for CSTM?

Three Class A sales by Stephane Corre are shown. The transactions: 02/25/2026 for 3,200 shares, 02/27/2026 for 3,000 shares, and 03/10/2026 for 1,500 shares, each with corresponding proceeds listed in the excerpt.

Does the Form 144 mention equity awards for Constellium (CSTM)?

Yes. The excerpt lists RSU and PSU grant counts dated 04/01/2022. It shows 1,871 RSUs and 3,129 PSUs under equity compensation entries with the 04/01/2022 grant date.