Performance award gives Constellium (NYSE: CSTM) executive 8,026 shares

Rhea-AI Filing Summary

Corre Stephane reported open-market purchase transactions in this Form 4 filing.

Constellium SE President, AS&I Stephane Corre acquired 8,026 ordinary shares of the company. These shares represent earned non-derivative performance stock units that were granted on March 9, 2023 and vested on March 9, 2026. Following this award vesting, Corre directly holds 66,520 ordinary shares.

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

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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^*

Corre Stephane

(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)
	President, AS&I

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		P		8,026(1)	A	$0	66,520	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 Stephane Corre	03/11/2026
	** Signature of Reporting Person	Date
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FAQ

What did Constellium (CSTM) executive Stephane Corre report on this Form 4?

Stephane Corre reported acquiring 8,026 ordinary shares of Constellium SE. The shares came from performance stock units that were granted in March 2023 and vested in March 2026, increasing his direct holdings to 66,520 shares.

Was the Constellium (CSTM) Form 4 transaction an open-market buy?

The Form 4 uses a purchase code, but the footnote states the 8,026 shares represent earned performance stock units. These units were granted in March 2023 and vested in March 2026, making this a compensation-related share acquisition rather than an open-market purchase.

How many Constellium (CSTM) shares does Stephane Corre hold after this Form 4?

After this transaction, Stephane Corre directly holds 66,520 ordinary shares of Constellium SE. The increase reflects the vesting of 8,026 performance stock units granted in March 2023 that vested on March 9, 2026 as disclosed.

What is the origin of the 8,026 Constellium (CSTM) shares in this filing?

The 8,026 shares come from non-derivative performance stock units of Constellium SE. These units were granted on March 9, 2023 with performance-vesting requirements and vested on March 9, 2026, resulting in delivery of ordinary shares to Stephane Corre.

Does the Constellium (CSTM) Form 4 mention any remaining derivative awards?

The insider data indicates no remaining derivative positions in this filing. The disclosed transaction concerns 8,026 earned performance stock units that converted into ordinary shares, with total direct ownership reported as 66,520 shares after the vesting event.

What role does Stephane Corre hold at Constellium (CSTM)?

Stephane Corre is identified as an officer of Constellium SE with the title President, AS&I. The Form 4 shows his compensation-related acquisition of 8,026 ordinary shares through the vesting of performance stock units granted in March 2023.