Constellium director granted 625 share units

Weiler Wiebke reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Weiler Wiebke reported acquisition or exercise transactions in this Form 4 filing.

CONSTELLIUM SE director Wiebke Weiler received an equity grant tied to future service. The filing reports an award of 625 ordinary-share-based restricted stock units, which vest in full on March 12, 2029, subject to the director’s continued employment. Following this grant, Weiler’s reported direct holdings total 625 shares.

Insider Trade Summary

Grant/Award: 625 shares

Grant/Award 1 txn

Insider Weiler Wiebke

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Ordinary shares	625	$0.00	$0.00

Holdings After Transaction: Ordinary shares — 625 shares (Direct)

Footnotes (1)

1. F1. Represents the grant of restricted stock units of Constellium SE, which vest in full on March 12, 2029, subject to the Reporting Person's continued employment.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CONSTELLIUM SE (CSTM) disclose for Wiebke Weiler?

CONSTELLIUM SE reported that director Wiebke Weiler received an award of 625 restricted stock units. These units are linked to ordinary shares and represent a compensation-related equity grant rather than an open-market share purchase or sale.

How many CONSTELLIUM SE (CSTM) shares did Wiebke Weiler acquire in this Form 4?

The Form 4 shows Wiebke Weiler was granted 625 restricted stock units tied to CONSTELLIUM SE ordinary shares. After this transaction, her reported direct holdings total 625 shares, reflecting this new equity award under the company’s compensation arrangements.

When do Wiebke Weiler’s CONSTELLIUM SE (CSTM) restricted stock units vest?

The restricted stock units granted to Wiebke Weiler vest in full on March 12, 2029. Vesting is conditioned on her continued employment with CONSTELLIUM SE through that date, aligning the award with long-term service and retention incentives.

Is the CONSTELLIUM SE (CSTM) Form 4 for Wiebke Weiler a market purchase or sale?

The Form 4 does not show a market purchase or sale. It records a grant of 625 restricted stock units at a price of $0.0000 per share, indicating a compensation-related equity award rather than an open-market trade by the director.

What is Wiebke Weiler’s reported CONSTELLIUM SE (CSTM) shareholding after this grant?

Following the award of 625 restricted stock units, Wiebke Weiler’s reported direct holdings in CONSTELLIUM SE total 625 shares. This reflects the position after the compensation grant recorded in the Form 4 filing with the SEC.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/16/2026 - 09:49 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^*

Weiler Wiebke

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/12/2026

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	03/12/2026		A		625(1)	A	$0	625	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 the grant of restricted stock units of Constellium SE, which vest in full on March 12, 2029, subject to the Reporting Person's continued employment.

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Wiebke Weiler	03/16/2026
	** 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.
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