CSTM affiliate files Form 144 to sell 41,717 shares

CSTM affiliate filed a Form 144 reporting proposed sale of 41,717 shares.

Accepted by SEC EDGAR 05/05/2026 - 04:14 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

CSTM affiliate filed a Form 144 reporting proposed sale of 41,717 shares. The filing names Guo Jack Q as the selling person and shows aggregate proceeds of $1,079,218.79. The securities include Performance Stock Units awarded on 08/05/2020, 05/25/2021, and 04/01/2022. The sale is reported for NYSE-listed common stock.

Key Figures

Shares proposed for sale: 41,717 shares Aggregate proceeds: $1,079,218.79 Performance Stock Units (04/01/2022): 3,437 units +3 more

6 metrics

Shares proposed for sale 41,717 shares reported sale amount in Form 144

Aggregate proceeds $1,079,218.79 reported proceeds linked to the 41,717 shares

Performance Stock Units (04/01/2022) 3,437 units award date 04/01/2022, listed as source

Performance Stock Units (05/25/2021) 12,515 units award date 05/25/2021, listed as source

Performance Stock Units (08/05/2020) 9,249 units award date 08/05/2020, listed as source

Registrant outstanding (context line) 136,150,450 figure appearing in filer header (05/05/2026)

Key Terms

Form 144, Performance Stock Units, Issuer

3 terms

Form 144 regulatory

"reported sale of 41,717 shares by Guo Jack Q"

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.

Performance Stock Units financial

"Performance Stock Units awarded on 04/01/2022, 05/25/2021, 08/05/2020"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

Issuer legal

"Performance Stock Units | Issuer | Services Rendered"

FAQ

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

What does CSTM Form 144 report about the insider sale?

It reports a proposed sale of 41,717 shares by an affiliate. The filing lists $1,079,218.79 in aggregate proceeds and identifies Guo Jack Q as the selling person for NYSE common stock.

Who is the selling person named in the CSTM Form 144?

The filing names Guo Jack Q as the selling person. The address shown is 300 East Lombard Street Suite 1710, Baltimore MD 21202, linked to the reported transaction.

What securities are being sold according to the filing?

The filing shows common stock tied to Performance Stock Units awarded on 08/05/2020, 05/25/2021, and 04/01/2022. These awards are listed as the source of the shares.

How much proceeds are reported for the CSTM sale?

Aggregate proceeds are listed as $1,079,218.79. That figure appears next to the reported sale of 41,717 shares in the Form 144 excerpt.

On which exchange is CSTM common stock listed in the filing?

The filing indicates the common stock is listed on the NYSE. The excerpt includes exchange information consistent with an NYSE-listed common share transaction.

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	0002095182
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	CONSTELLIUM SE
SEC File Number	001-35931
Address of Issuer	300 East Lombard Street Suite 1710 Baltimore MARYLAND 21202
Phone	4434207861
Name of Person for Whose Account the Securities are To Be Sold	JACK GUO
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	Officer

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	25201	822308.63	136150450	05/05/2026	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	Performance Stock Units	Issuer			3437	04/01/2022	Services Rendered
Common	05/25/2021	Performance Stock Units	Issuer			12515	05/25/2021	Services Rendered
Common	08/05/2020	Performance Stock Units	Issuer			9249	08/05/2020	Services Rendered

* 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
Guo Jack Q 300 East Lombard Street Suite 1710 Baltimore MD 21202	COMMON/ORDINARY:CL A	03/10/2026	41717	1079218.79

144: Remarks and Signature

Remarks
Date of Notice	05/05/2026
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	/s/ Jack Qiang Guo
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)