Rule 144 notice lists Class A share sales for CSTM (CSTM)

Rhea-AI Filing Summary

Stephane Corre submitted a Rule 144 notice covering proposed sales of Class A common stock and lists equity awards from prior grants. The filing itemizes RSU 1,500 (04/07/2023) and PSU 3,500 (04/01/2022) as securities to be sold and records recent open-market sales on specific dates.

Key Figures

Sale 03/10/2026: 1,500 shares Sale 02/25/2026: 3,200 shares Sale 02/27/2026: 3,000 shares +3 more

6 metrics

Sale 03/10/2026 1,500 shares proceeds $38,828.48 on 03/10/2026

Sale 02/25/2026 3,200 shares proceeds $82,260 on 02/25/2026

Sale 02/27/2026 3,000 shares proceeds $74,066 on 02/27/2026

Sale 05/01/2026 5,000 shares proceeds $160,207.94 on 05/01/2026

RSU granted 1,500 shares grant date 04/07/2023 (Equity Compensation)

PSU granted 3,500 shares grant date 04/01/2022 (Equity Compensation)

Key Terms

Rule 144, RSU, PSU, Class A Shares

4 terms

Rule 144 regulatory

"144: Securities To Be Sold"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

RSU financial

"Common | 04/07/2023 | RSU | Constellium SE (issuer)"

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

"Common | 04/01/2022 | PSU | Constellium SE (issuer)"

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	167590.6	136150450	05/08/2026	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	04/07/2023	RSU	Constellium SE (issuer)			1500	04/07/2023	Equity Compensation
Common	04/01/2022	PSU	Constellium SE (issuer)			3500	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
Stephane Corre 14 TER Rue du docteur Teilhol Aubiere I0 63170	Class A Shares	05/01/2026	5000	160207.94

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 the CSTM Rule 144 filing disclose about securities to be sold?

The filing lists RSU 1,500 granted 04/07/2023 and PSU 3,500 granted 04/01/2022 as securities to be sold. It identifies these awards as equity compensation and labels them as Common/Class A shares in the notice.

Which recent share sales by Stephane Corre are shown in the CSTM filing?

The filing reports several sales: 1,500 shares on 03/10/2026 for $38,828.48; 3,200 shares on 02/25/2026 for $82,260; 3,000 shares on 02/27/2026 for $74,066; and 5,000 shares on 05/01/2026 for $160,207.94.

Does the CSTM notice state the exchange for the securities listed?

Yes. The filing identifies the trading venue as the NYSE. The notice pairs the listed securities with broker information showing J.P. Morgan Securities LLC at 270 Park Ave on the form.

Are the listed RSUs/PSUs in the CSTM filing described as compensation awards?

Yes. The filing explicitly categorizes both items as Equity Compensation. The RSU (1,500) and PSU (3,500) entries include grant dates and are labeled under the securities-to-be-sold section as compensation-derived common stock.