Constellium (CSTM) director Lori Walker discloses 36,294 indirectly held shares

Rhea-AI Filing Summary

Constellium SE director Lori A. Walker has reported her initial beneficial ownership in the company. As of the event date of 01/01/2026, she indirectly holds 36,294 ordinary shares of Constellium SE, which are owned through the Tim and Lori Walker Revocable Trust. This filing is made on behalf of Lori A. Walker by an attorney-in-fact, reflecting her position as a director and confirming her equity stake in the company.

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^*

WALKER LORI A

(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	36,294	I	Tim and Lori Walker Revocable Trust

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 Lori A. Walker	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 ownership did CSTM director Lori A. Walker report?

Lori A. Walker reported indirect beneficial ownership of 36,294 ordinary shares of Constellium SE (CSTM), held through the Tim and Lori Walker Revocable Trust.

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

The reporting person, Lori A. Walker, is a director of Constellium SE, as indicated by the checked box for Director in the filing.

How are Lori A. Walker’s CSTM shares held?

The 36,294 ordinary shares are reported as held indirectly through the Tim and Lori Walker Revocable Trust, rather than directly in her own name.

What is the event date for this CSTM insider ownership report?

The date of the event requiring this statement is 01/01/2026, which is the reference date for the reported beneficial ownership in Constellium SE.

Does this CSTM insider filing report any derivative securities?

The section for derivative securities is present, but no specific derivative positions are listed for Lori A. Walker in the provided content.

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

The filing indicates that the Form is filed by one reporting person, with the box checked for Form filed by One Reporting Person.