Constellium (CSTM) director files Form 3 with 39,035 shares owned

Rhea-AI Filing Summary

Constellium SE director Jean-Christophe Deslarzes filed an initial ownership report, indicating his beneficial holdings in the company. As of the event date of 01/01/2026, he beneficially owned 39,035 ordinary shares of Constellium SE, held in direct form. The filing shows no derivative securities, such as options or warrants, reported at this time.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Deslarzes Jean-Christophe

Role Director

Type	Security	Shares	Price	Value
holding	Ordinary shares	--	--	--

Holdings After Transaction: Ordinary shares — 39,035 shares (Direct)

Footnotes (1)

Understanding Insider Trading Forms →

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^*

Deslarzes Jean-Christophe

(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	39,035	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 Jean-Christophe Deslarzes	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 latest Form 3 for CSTM disclose?

The Form 3 discloses that director Jean-Christophe Deslarzes beneficially owns 39,035 ordinary shares of Constellium SE held directly as of 01/01/2026.

How many Constellium SE (CSTM) shares does the reporting person own?

The reporting person beneficially owns 39,035 ordinary shares of Constellium SE, reported as directly held.

What is the relationship of the reporting person to Constellium SE (CSTM)?

The reporting person is a director of Constellium SE, as indicated by the checked box for director status.

Are any derivative securities reported in this Constellium SE (CSTM) Form 3?

No derivative securities are listed in Table II; only 39,035 ordinary shares are reported in Table I.

Is the Constellium SE (CSTM) Form 3 filed by one or multiple reporting persons?

The form is indicated as filed by one reporting person, as shown by the checked line in the filing.

What is the event date for the reported Constellium SE (CSTM) holdings?

The date of the event requiring the statement is 01/01/2026, which is the reference date for the reported holdings.