Constellium (CSTM) SVP Marcus Becker sells 15,570 ordinary shares

Rhea-AI Filing Summary

Constellium SE senior vice president and chief production officer Marcus Becker reported an open-market sale of company stock. On February 20, 2026, he sold 15,570 ordinary shares of Constellium SE at a weighted average price of $25.5793 per share, in transactions described as occurring within that same price level. After this sale, his directly held ordinary shares reported in this filing were reduced to zero.

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^*

Becker Marcus

(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 CPO

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2026

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	02/20/2026		S		15,570	D	$25.5793(1)	0	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 $25.5793 to $25.5793, 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 Marcus Becker	02/24/2026
	** 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 Marcus Becker?

Constellium reported that SVP CPO Marcus Becker sold 15,570 ordinary shares in an open-market transaction. The sale occurred on February 20, 2026, and was reported as a Form 4 insider transaction with direct ownership status following the trades.

How many Constellium (CSTM) shares did Marcus Becker sell and at what price?

Marcus Becker sold 15,570 ordinary shares of Constellium SE at a weighted average price of $25.5793 per share. The filing notes the shares were sold in multiple transactions, all within this same reported price level.

What type of Form 4 transaction did Constellium (CSTM) disclose for Marcus Becker?

The Form 4 shows an open-market sale of non-derivative ordinary shares by Marcus Becker. The transaction is coded “S,” indicating a sale in open market or private transaction, with 15,570 shares disposed of directly on February 20, 2026.

What is Marcus Becker’s reported Constellium (CSTM) shareholding after this Form 4 sale?

After the reported sale of 15,570 ordinary shares, Marcus Becker’s directly held Constellium SE ordinary shares shown in the filing are zero. The Form 4 lists total shares following the transaction as 0.0000 under direct ownership.

How does the Constellium (CSTM) Form 4 describe the sale pricing for Marcus Becker’s shares?

The Form 4 states that the price is a weighted average of multiple transactions, all ranging from $25.5793 to $25.5793 per share. The reporting person offers to provide detailed trade breakdowns upon request to Constellium, shareholders, or regulators.

What role does Marcus Becker hold at Constellium (CSTM) in this Form 4 filing?

In the Form 4, Marcus Becker is identified as an officer of Constellium SE with the title “SVP CPO.” This indicates he is a senior vice president serving as chief production officer while engaging in the reported share sale transaction.