Constellium SE (CSTM) officer Stephen Walters discloses 1,500 share holding

Rhea-AI Filing Summary

Constellium SE executive Stephen Walters filed an initial ownership report as an insider of the company. He is identified as an officer with the title SVP GC & Secretary and reports beneficial ownership of 1,500 ordinary shares of Constellium SE. The filing is made as a single reporting person and does not list any derivative securities such as options or warrants.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Walters Stephen Charles

(Last) (First) (Middle)

300 EAST LOMBARD STREET

SUITE 1710

(Street)

BALTIMORE MD 21202

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/01/2026

3. Issuer Name and Ticker or Trading Symbol
CONSTELLIUM SE [ CSTM ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP GC & Secretary

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary shares	1,500	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Stephen Walters	01/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does the Form 3 filing disclose for Constellium SE (CSTM)?

The filing discloses that Stephen Walters, an officer of Constellium SE, beneficially owns 1,500 ordinary shares of the company as of the reported event date.

Who is the reporting person in this Constellium SE (CSTM) Form 3?

The reporting person is Stephen Walters, who serves as SVP GC & Secretary of Constellium SE.

What is Stephen Walters' relationship to Constellium SE (CSTM)?

Stephen Walters is reported as an officer of Constellium SE, with the title SVP GC & Secretary. He is not marked as a director or a 10% owner in this filing.

How many Constellium SE (CSTM) shares does Stephen Walters beneficially own?

Stephen Walters reports beneficial ownership of 1,500 ordinary shares of Constellium SE, held in direct ownership form.

Does the Constellium SE (CSTM) Form 3 show any derivative securities?

No derivative securities are listed. The table for derivative securities is present but does not show any options, warrants, or other derivative holdings for Stephen Walters.

Is this Constellium SE (CSTM) Form 3 filed by more than one reporting person?

No. The filing indicates that it is a Form filed by One Reporting Person, referring only to Stephen Walters.