Constellium (CSTM) SVP Piquier gains 30,350 shares from vested performance units

Rhea-AI Filing Summary

CONSTELLIUM SE reported that senior vice president for Manufacturing Excellence and CTO Ludovic Piquier acquired 30,350 ordinary shares on March 9, 2026 through an equity award. These shares reflect earned performance stock units granted on March 9, 2023 that vested based on performance conditions. Following this grant, Piquier directly owns 237,244 ordinary shares, highlighting ongoing equity-based compensation rather than an open-market purchase.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Piquier Ludovic

Role SVP Manuf Excellence & CTO

Type	Security	Shares	Price	Value
Grant/Award	Ordinary shares	30,350	$0.00	--

Holdings After Transaction: Ordinary shares — 237,244 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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. Issuer Name and Ticker or Trading Symbol
CONSTELLIUM SE [ CSTM ]

5. 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

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary shares	03/09/2026		A		30,350(1)	A	$0	237,244	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents earned non-derivative performance stock units of Constellium SE (the "Issuer") granted on March 9, 2023 that contained performance-vesting requirements, which vested on March 9, 2026.

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 4 (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 did Constelium (CSTM) disclose in this Form 4 for Ludovic Piquier?

Constelium disclosed that SVP Manufacturing Excellence and CTO Ludovic Piquier received 30,350 ordinary shares as an equity award. These shares came from performance stock units granted in March 2023 that vested on March 9, 2026 based on performance conditions.

How many Constelium (CSTM) shares did Ludovic Piquier acquire in this transaction?

Ludovic Piquier acquired 30,350 ordinary shares of Constelium in this Form 4 transaction. The shares represent earned performance stock units that satisfied performance-vesting requirements and converted into ordinary shares on March 9, 2026 at no cash purchase price.

What is Ludovic Piquier’s total Constelium (CSTM) ownership after this Form 4?

After the reported award, Ludovic Piquier directly owns 237,244 Constelium ordinary shares. This total reflects the addition of 30,350 shares from vested performance stock units on March 9, 2026 and represents his direct equity stake reported in this filing.

Was the Constelium (CSTM) Form 4 transaction an open-market purchase or a grant?

The transaction was a grant-related acquisition, not an open-market purchase. Piquier received 30,350 ordinary shares at a stated price of $0.00 per share, reflecting vested performance stock units originally granted on March 9, 2023 under equity compensation.

What are the performance stock units mentioned in the Constelium (CSTM) Form 4?

The performance stock units were an equity award granted on March 9, 2023 that included performance-vesting requirements. Once those conditions were met, the units vested on March 9, 2026 and converted into 30,350 Constelium ordinary shares credited to Ludovic Piquier.

Does this Constelium (CSTM) Form 4 indicate any share sales by Ludovic Piquier?

No share sales are reported in this Form 4. The filing shows only an acquisition of 30,350 ordinary shares via vested performance stock units, increasing Piquier’s direct holdings to 237,244 shares, with no dispositions or open-market selling activity disclosed in this transaction.