Constellium (CSTM) SVP reports 30,242-share beneficial holding

Rhea-AI Filing Summary

CONSTELLIUM SE senior executive Niklaus Schild has updated his reported shareholdings. As of January 1, 2026, he reports beneficial ownership of 30,242 ordinary shares, consisting of 18,115 ordinary shares held outright and 12,127 restricted stock units that remain subject to vesting and were inadvertently omitted from his original Form 3.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Schild Niklaus

Role SVP CIO & CDO

Type	Security	Shares	Price	Value
holding	Ordinary shares	--	--	--

Holdings After Transaction: Ordinary shares — 30,242 shares (Direct)

Footnotes (1)

1. [object Object]

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Schild Niklaus

(Last) (First) (Middle)

300 EAST LOMBARD STREET

SUITE 1710

(Street)

BALTIMORE MD 21202

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/01/2026

3. Issuer Name and Ticker or Trading Symbol
CONSTELLIUM SE [ CSTM ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP CIO & CDO

5. If Amendment, Date of Original Filed (Month/Day/Year)
01/02/2026

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary shares	30,242(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Amount consists of (i) 18,115 ordinary shares held by the Reporting Person as of January 1, 2026 and (ii) an aggregate of 12,127 restricted stock units which remain subject to vesting restrictions and which were inadvertently omitted from the Reporting Person's original Form 3 filing.

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Niklaus Schild	03/11/2026
	** 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 5 (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 does Constellium (CSTM) executive Niklaus Schild report owning in this amended Form 3?

Niklaus Schild reports beneficial ownership of 30,242 ordinary shares of Constellium. This total includes 18,115 ordinary shares he holds directly and 12,127 restricted stock units that are still subject to vesting conditions as of January 1, 2026.

How many restricted stock units does CSTM executive Niklaus Schild report in this filing?

The filing states that Niklaus Schild holds 12,127 restricted stock units. These RSUs remain subject to vesting restrictions and were inadvertently omitted from his original Form 3, prompting this amended ownership report as of January 1, 2026.

Why did Constellium (CSTM) file an amended Form 3 for Niklaus Schild?

The amended Form 3 corrects Schild’s original ownership report by adding 12,127 restricted stock units. These RSUs were previously omitted in error, so the amendment updates his total beneficial ownership to 30,242 ordinary shares-equivalent as of January 1, 2026.

What portion of Niklaus Schild’s Constellium (CSTM) holdings are fully owned shares?

Out of his reported 30,242 ordinary shares, 18,115 are ordinary shares held directly by Niklaus Schild. The remainder, 12,127 units, are restricted stock units that still need to vest before becoming unrestricted ordinary shares.

Does the amended Form 3 for Constellium (CSTM) show any new insider buying or selling?

The amended Form 3 does not report any new insider purchases or sales. It simply clarifies Niklaus Schild’s existing position by including 12,127 restricted stock units that were mistakenly left out of his original ownership disclosure.