Constellium SE (CSTM) officer discloses 15,570 ordinary shares owned

Rhea-AI Filing Summary

Constellium SE reported that one of its senior officers, serving as SVP CPO, beneficially owns 15,570 ordinary shares of the company. The ownership is listed as held directly, meaning the shares are in the reporting person's own name rather than through another entity. The report is tied to an event date of 01/01/2026 and is filed by a single reporting person, identified in the signature block as Marcus Becker, with the form signed by an attorney-in-fact on his behalf.

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^*

Becker Marcus

(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 CPO

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	15,570	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 Marcus Becker	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 insider holding was reported for Constellium SE (CSTM)?

The filing shows that a senior officer of Constellium SE, identified in the signature as Marcus Becker, beneficially owns 15,570 ordinary shares.

What is the role of the reporting person at Constellium SE (CSTM)?

The reporting person is an officer of Constellium SE with the title SVP CPO, as indicated in the relationship section.

Is the Constellium SE (CSTM) insider ownership direct or indirect?

The 15,570 ordinary shares are reported with an ownership form of Direct (D), meaning they are held directly by the reporting person.

What is the date of the event for this Constellium SE (CSTM) insider report?

The date of the event requiring the statement is listed as 01/01/2026.

Does the filing list any derivative securities for the Constellium SE (CSTM) insider?

The section for Derivative Securities Beneficially Owned is present but does not list any specific derivative positions or amounts.

Who signed the Constellium SE (CSTM) insider filing?

The form is signed as /s/ Kristine Carpenter, Attorney-in-Fact for Marcus Becker, dated 01/02/2026.