Constellium SE (CSTM) officer files Form 3 showing 18,115 shares

Rhea-AI Filing Summary

Constellium SE executive Niklaus Schild has filed an initial ownership report as an insider of the company. The filing identifies him as an officer of Constellium SE with the title SVP CIO & CDO. As of the event date of 01/01/2026, he beneficially owns 18,115 ordinary shares of Constellium SE, held in direct form. The filing reports no 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^*

Schild Niklaus

(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 CIO & CDO

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	18,115	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 Niklaus Schild	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 about insider holdings?

The Form 3 shows that Constellium SE officer Niklaus Schild, serving as SVP CIO & CDO, beneficially owns 18,115 ordinary shares, held directly as of 01/01/2026.

Who is the reporting person in Constellium SE (CSTM)'s recent insider ownership filing?

The reporting person is Niklaus Schild, an officer of Constellium SE with the title SVP CIO & CDO, as disclosed in the Form 3.

How many Constellium SE (CSTM) shares does the insider report owning?

The insider reports beneficial ownership of 18,115 ordinary shares of Constellium SE, classified as direct ownership.

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

No derivative securities are listed in Table II. The filing does not report options, warrants, or other derivative positions.

What is the event date for the insider ownership reported for CSTM?

The date of the event requiring this initial ownership statement is 01/01/2026, as stated in the filing.

Is this Constellium SE (CSTM) insider filing for one person or multiple insiders?

The document indicates that the Form is filed by one reporting person, referring only to Niklaus Schild.