Constellium (CSTM) president sells 80,000 ordinary shares in open market

Rhea-AI Filing Summary

Constellium SE executive Philippe Hoffmann, President A&T, reported selling a total of 80,000 ordinary shares in two open-market transactions on March 4, 2026. One sale covered 50,000 shares at a weighted average price of $26.03, and another covered 30,000 shares at a weighted average price of $27.14. After these sales, he directly owned 55,425 ordinary shares.

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^*

Hoffmann Philippe

(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, A&T

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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	03/04/2026		S		50,000	D	$26.03(1)	85,425	D
Ordinary shares	03/04/2026		S		30,000	D	$27.14(2)	55,425	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 $25.95 to $26.25, 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.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.10 to $27.23, 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 Philippe Hoffmann	03/06/2026
	** 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 Philippe Hoffmann?

Constellium reported that Philippe Hoffmann, President A&T, sold a total of 80,000 ordinary shares in open-market transactions. These sales occurred on March 4, 2026, and were disclosed on a Form 4 insider trading report.

How many Constellium (CSTM) shares did Philippe Hoffmann sell and at what prices?

Philippe Hoffmann sold 50,000 ordinary shares at a weighted average price of $26.03 and 30,000 ordinary shares at a weighted average price of $27.14. Both transactions were reported as open-market sales of Constellium SE ordinary shares.

What is Philippe Hoffmann’s remaining Constellium (CSTM) share ownership after the reported sales?

After the reported transactions, Philippe Hoffmann directly owned 55,425 ordinary shares of Constellium SE. This figure reflects his direct holdings following the combined sale of 80,000 ordinary shares on March 4, 2026, as shown in the Form 4 filing.

Were the Constellium (CSTM) insider sales by Philippe Hoffmann single trades or price ranges?

The sales were reported using weighted average prices, indicating multiple trades within price ranges. One set ranged from $25.95 to $26.25, and the other from $27.10 to $27.23, with full trade details available upon request as stated.

What type of transaction code was used in Philippe Hoffmann’s Constellium (CSTM) Form 4?

The Form 4 lists transaction code “S” for both trades, described as a sale in open market or private transaction. The normalized data identify these as open-market sales of Constellium SE ordinary shares by the reporting person.

Does the Constellium (CSTM) Form 4 mention indirect ownership or special entities for these shares?

The transactions are reported as direct ownership of ordinary shares, with no nature-of-ownership footnote describing trusts, LLCs, or other entities. Footnotes instead clarify that the reported prices are weighted averages across multiple trades within specified ranges.