Constellium SE (CSTM) President A&T discloses 135,425 ordinary shares

Rhea-AI Filing Summary

Constellium SE insider ownership disclosure: A company officer has filed an initial statement of beneficial ownership. The reporting person, identified as the President, A&T of Constellium SE (CSTM), reports holding 135,425 ordinary shares of the company. These shares are reported as held with direct ownership. The statement is filed as a single-person filing and reflects the officer’s ownership position as of 01/01/2026.

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^*

Hoffmann Philippe

(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)
	President, A&T

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	135,425	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 Philippe Hoffmann	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 this Form 3 filing disclose for CSTM?

This Form 3 discloses that an officer of Constellium SE (CSTM) holds 135,425 ordinary shares of the company with direct ownership as of 01/01/2026.

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

The reporting person is an officer of Constellium SE, serving as President, A&T, who is required to report their initial beneficial ownership of company securities.

How many Constellium SE (CSTM) shares does the officer beneficially own?

The officer reports beneficial ownership of 135,425 ordinary shares of Constellium SE, held with direct ownership.

Does this Form 3 for CSTM report any derivative securities?

The filing includes a section for derivative securities, but no specific derivative positions are listed in the provided content.

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

No. The filing indicates it is a Form filed by One Reporting Person, not a joint or group filing.

Who signed the Form 3 for the Constellium SE (CSTM) officer?

The Form 3 is signed by /s/ Kristine Carpenter as Attorney-in-Fact for Philippe Hoffmann, dated 01/02/2026.