Constellium (CSTM) executive Stephane Corre sells 3,200 shares in open market

Rhea-AI Filing Summary

CONSTELLIUM SE executive Stephane Corre sold 3,200 ordinary shares in an open-market transaction. The shares were sold on February 25, 2026 at a weighted average price of $25.7068 per share, leaving him with 47,444 ordinary shares held directly after the sale.

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

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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)
02/25/2026

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	02/25/2026	02/25/2026	S		3,200	D	$25.7068(1)	47,444	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. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.653 to $25.710, inclusive. The reporting person undertakes to provide to Constellium SE, any security holder of Constellium SE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Stephane Corre	02/27/2026
	** 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 insider transaction did CONSTELLIUM (CSTM) report for Stephane Corre?

CONSTELLIUM reported that executive Stephane Corre sold 3,200 ordinary shares. The transaction was an open-market sale, reducing his directly held stake to 47,444 shares after the trade was completed.

At what price did Stephane Corre sell CONSTELLIUM (CSTM) shares?

Stephane Corre sold 3,200 CONSTELLIUM ordinary shares at a weighted average price of $25.7068. A footnote explains the sales occurred in multiple trades between $25.653 and $25.710 per share.

How many CONSTELLIUM (CSTM) shares does Stephane Corre hold after this sale?

After the reported sale, Stephane Corre holds 47,444 CONSTELLIUM ordinary shares directly. This figure reflects his ownership immediately following the 3,200-share open-market disposition on February 25, 2026.

Was the CONSTELLIUM (CSTM) insider transaction a buy or a sell?

The CONSTELLIUM insider transaction was a sell. Stephane Corre executed an open-market sale of 3,200 ordinary shares, as indicated by transaction code “S” and the description of a sale in the filing data.

What does the Form 4 footnote say about the CONSTELLIUM (CSTM) insider sale prices?

The footnote states the reported price is a weighted average. Individual trades occurred between $25.653 and $25.710 per share, and detailed trade breakdowns are available on request from CONSTELLIUM, its security holders, or SEC staff.

Who is the CONSTELLIUM (CSTM) insider involved in this Form 4 filing?

The insider is Stephane Corre, who serves as President, AS&I at CONSTELLIUM. He reported a direct open‑market sale of 3,200 ordinary shares and now directly owns 47,444 shares following the transaction.