Constellium (CSTM) SVP reports 35,328-share Form 3/A correction

Rhea-AI Filing Summary

CONSTELLIUM SE senior vice president and chief procurement officer Marcus Becker filed an amended Form 3 to update his reported holdings. As of January 1, 2026, he beneficially owns 35,328 ordinary shares, including 15,570 shares and 19,758 restricted stock units that remain subject to vesting and were previously omitted from earlier filings.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Becker Marcus

Role SVP CPO

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

Holdings After Transaction: Ordinary shares — 35,328 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

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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. 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 CPO

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	35,328	D(1)

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) 15,570 ordinary shares held by the Reporting Person as of January 1, 2026 and (ii) an aggregate of 19,758 restricted stock units which remain subject to vesting restrictions and which were inadvertently omitted from the Reporting Person's original Form 3 filing and one Form 4 filed by the Reporting Person prior to the date of this amendment.

Remarks:

	/s/ Kristine Carpenter, Attorney-in-Fact for Marcus Becker	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 the Marcus Becker Form 3/A for CONSTELLIUM SE (CSTM) report?

The Form 3/A reports updated holdings for SVP CPO Marcus Becker. It shows beneficial ownership of 35,328 CONSTELLIUM SE ordinary shares as of January 1, 2026, combining directly held shares and restricted stock units.

How many CONSTELLIUM SE (CSTM) shares does Marcus Becker report owning?

Marcus Becker reports beneficial ownership of 35,328 ordinary shares. This total consists of 15,570 ordinary shares he holds and 19,758 restricted stock units that remain subject to vesting restrictions as of January 1, 2026.

What portion of Marcus Becker’s CONSTELLIUM SE (CSTM) holdings are restricted stock units?

The filing states that 19,758 of Marcus Becker’s 35,328 reported ordinary-share-equivalent holdings are restricted stock units. These RSUs remain subject to vesting restrictions, meaning they will only become shares if the specified vesting conditions are met.

Why was Marcus Becker’s CONSTELLIUM SE (CSTM) Form 3 amended?

The Form 3 was amended because 19,758 restricted stock units were inadvertently omitted. The footnote explains these RSUs were missing from his original Form 3 and from one previously filed Form 4, so this amendment corrects the reported holdings.

As of what date are Marcus Becker’s CONSTELLIUM SE (CSTM) holdings reported?

Marcus Becker’s holdings are reported as of January 1, 2026. On that date, he held 15,570 ordinary shares directly and 19,758 restricted stock units subject to vesting, for a total reported beneficial ownership of 35,328 ordinary-share equivalents.

Does the Marcus Becker Form 3/A for CONSTELLIUM SE (CSTM) show any new share purchases or sales?

The amendment does not show new purchases or sales. Instead, it corrects previously reported holdings by adding 19,758 restricted stock units that were omitted from the original Form 3 and one earlier Form 4, updating his total beneficial ownership.