Constellium (NYSE: CSTM) SVP updates share and RSU holdings

Rhea-AI Filing Summary

Constellium SE senior vice president Ludovic Piquier has updated his reported ownership in the company’s ordinary shares. As of January 1, 2026, he reports holding a total of 206,894 ordinary shares.

This total consists of 180,885 ordinary shares held directly and 26,009 restricted stock units that remain subject to vesting restrictions and were inadvertently omitted from his original Form 3. The amendment corrects and consolidates his full equity position.

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 — 206,894 shares (Direct)

Footnotes (1)

1. [object Object]

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)
01/02/2026

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	206,894(1)	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:

1. Amount consists of (i) 180,885 ordinary shares held by the Reporting Person as of January 1, 2026 and (ii) an aggregate of 26,009 restricted stock units which remain subject to vesting restrictions and which were inadvertently omitted from the Reporting Person's original Form 3 filing.

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Ludovic Piquier	03/11/2026
	** 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

How many Constellium (CSTM) shares does Ludovic Piquier report owning now?

Ludovic Piquier reports owning a total of 206,894 Constellium ordinary shares as of January 1, 2026. This includes 180,885 ordinary shares held directly and 26,009 restricted stock units that are still subject to vesting conditions.

What correction does this amended Form 3/A make for Constellium (CSTM)?

The amendment corrects Piquier’s previously reported holdings by adding 26,009 restricted stock units that were inadvertently left out. These RSUs are part of his compensation and remain subject to vesting, bringing his total reported interest to 206,894 ordinary shares.

What portion of Ludovic Piquier’s Constellium (CSTM) position is restricted stock?

Out of Piquier’s reported 206,894 ordinary shares, 26,009 are restricted stock units. These RSUs represent share-based awards that will convert into ordinary shares only if vesting conditions are met, adding a deferred component to his equity stake.

Does this Constellium (CSTM) Form 3/A show any new insider buying or selling?

This Form 3/A does not report new insider buying or selling activity. Instead, it updates Ludovic Piquier’s existing ownership by adding 26,009 restricted stock units that were unintentionally omitted from his original initial ownership statement.

What role does Ludovic Piquier hold at Constellium (CSTM)?

Ludovic Piquier serves as Senior Vice President, Manufacturing Excellence and Chief Technology Officer at Constellium. His reported holdings of ordinary shares and restricted stock units reflect equity-based alignment with the company’s long-term performance.