Constellium SE (CSTM) director discloses direct ownership of 52,000 shares

Rhea-AI Filing Summary

Constellium SE director Michiel Brandjes reported his beneficial ownership in the company. As of the event date of 01/01/2026, he holds 52,000 ordinary shares of Constellium SE, owned directly. The filing does not list any derivative securities such as options or warrants for this director.

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

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1. Name and Address of Reporting Person^*

Brandjes Michiel

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

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	52,000	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 Michiel Brandjes	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 position was reported for CONSTELLIUM SE (CSTM)?

The filing reports director Michiel Brandjes as a reporting person for Constellium SE.

How many CONSTELLIUM SE (CSTM) shares does the director beneficially own?

The director beneficially owns 52,000 ordinary shares of Constellium SE.

Is the CONSTELLIUM SE (CSTM) director ownership held directly or indirectly?

The 52,000 ordinary shares are reported as held in direct ownership.

What is the event date for this CONSTELLIUM SE (CSTM) insider ownership report?

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

Does the CONSTELLIUM SE (CSTM) director report any derivative securities?

No derivative securities are listed in the table for this reporting person.

Is this CONSTELLIUM SE (CSTM) insider filing made by one or multiple reporting persons?

The document indicates it is a Form filed by One Reporting Person.