Constellium executive sells 3,000 shares

Constellium SE executive Stephane Corre, President of AS&I, reported an open-market sale of 3,000 ordinary shares on February 27, 2026 at a weighted average price of $24.69 per share, executed in multiple trades between $24.67 and $24.72.

Rhea-AI Filing Summary

Constellium SE executive Stephane Corre, President of AS&I, reported an open-market sale of 3,000 ordinary shares on February 27, 2026 at a weighted average price of $24.69 per share, executed in multiple trades between $24.67 and $24.72. After these transactions, Corre directly owns 44,444 ordinary shares.

Insider Trade Summary

Net Seller: 3,000 shares

Net Sell 1 txn

Insider Corre Stephane

Role President, AS&I

Sold 3,000 shs ($74K)

Type	Security	Shares	Price	Value
Sale	Ordinary shares	3,000	$24.69	$74K

Holdings After Transaction: Ordinary shares — 44,444 shares (Direct)

Footnotes (1)

1. F1. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.67 to $24.72, 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.

FAQ

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What insider transaction did Constellium (CSTM) report for Stephane Corre?

Constellium reported that executive Stephane Corre sold 3,000 ordinary shares in an open-market transaction. The sale occurred on February 27, 2026, at a weighted average price of $24.69 per share, with individual trades ranging from $24.67 to $24.72.

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

Stephane Corre sold Constellium shares at a weighted average price of $24.69. According to the filing, multiple trades were executed within a tight range, with prices spanning from $24.67 to $24.72 per ordinary share during the February 27, 2026 transactions.

How many Constellium (CSTM) shares does Stephane Corre hold after the sale?

After the reported sale, Stephane Corre directly holds 44,444 Constellium ordinary shares. The Form 4 filing specifies this post-transaction balance, reflecting the reduction following the 3,000-share open-market sale completed on February 27, 2026.

What type of insider transaction did Constellium (CSTM) disclose for Stephane Corre?

The company disclosed an open-market sale of ordinary shares by Stephane Corre. The Form 4 identifies transaction code “S,” meaning a sale, with 3,000 shares sold at a weighted average price of $24.69 in several trades within a narrow price range.

What role does Stephane Corre hold at Constellium (CSTM) in this Form 4 filing?

Stephane Corre is identified as an officer of Constellium, serving as President of the AS&I segment. His status as a company officer means his equity transactions in Constellium’s ordinary shares must be reported publicly on Form 4 to the Securities and Exchange Commission.

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Accepted by SEC EDGAR 03/03/2026 - 09:13 AM Learn about SEC filing dates

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^*

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)
02/27/2026

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	02/27/2026		S		3,000	D	$24.69(1)	44,444	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 $24.67 to $24.72, 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	03/03/2026
	** 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.