Constellium (CSTM) SVP Manufacturing Excellence & CTO reports share holdings

Rhea-AI Filing Summary

Constellium SE officer Ludovic Piquier filed an initial statement of beneficial ownership as of 01/01/2026. He is identified as an officer with the title SVP Manufacturing Excellence & CTO. The filing reports beneficial ownership of 180,885 ordinary shares, held in direct form. The report does not list any derivative securities such as options or warrants in the derivative securities table.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Piquier Ludovic

Role SVP Manuf Excellence & CTO

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

Holdings After Transaction: Ordinary shares — 180,885 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

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1. Name and Address of Reporting Person^*

Piquier Ludovic

(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 Manuf Excellence & CTO

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	180,885	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 Ludovic Piquier	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 ownership filing reveal for CSTM?

The filing shows that an officer of Constellium SE (CSTM), Ludovic Piquier, reported beneficial ownership of 180,885 ordinary shares held directly as of 01/01/2026.

What is Ludovic Piquier’s role at Constellium SE (CSTM)?

Ludovic Piquier is reported as an officer of Constellium SE with the title SVP Manufacturing Excellence & CTO.

Are any derivative securities reported in this CSTM Form 3 filing?

No derivative securities are listed in the derivative securities table; only ordinary shares are reported as beneficially owned.

Is this Form 3 filed by one or multiple reporting persons for CSTM?

The document indicates that the Form is filed by one reporting person, not by a group.

What is the event date for the reported ownership in this CSTM filing?

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