Constellium (CSTM) executive Stephane Corre sells 5,000 ordinary shares at $33.52

Rhea-AI Filing Summary

Constellium SE executive Stephane Corre, President of Automotive Structures & Industry, sold 5,000 ordinary shares in an open-market transaction at a weighted average price of $33.52 per share on May 8, 2026. After this sale, he directly holds 62,313 ordinary shares.

Insider Trade Summary

Net Seller: 5,000 shares ($167,600)

Net Sell 1 txn

Insider Corre Stephane

Role President, AS&I

Sold 5,000 shs ($168K)

Type	Security	Shares	Price	Value
Sale	Ordinary shares	5,000	$33.52	$168K

Holdings After Transaction: Ordinary shares — 62,313 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 5,000 shares Sale price: $33.52 per share Post-sale holdings: 62,313 shares +2 more

5 metrics

Shares sold 5,000 shares Open-market sale on May 8, 2026

Sale price $33.52 per share Weighted average sale price

Post-sale holdings 62,313 shares Direct ownership after transaction

Price range $33.50–$33.59 Range of individual trade prices

Transaction code S Sale in open market or private transaction

Key Terms

open-market sale, weighted average price, Ordinary shares, transaction code "S"

4 terms

open-market sale financial

"sold 5,000 ordinary shares in an open-market transaction at a weighted average price"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"The price reported is a weighted average price. These shares were sold in multiple transactions"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Ordinary shares financial

"security_title": "Ordinary shares""

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

transaction code "S" regulatory

"transaction_code": "S", "transaction_code_description": "Sale in open market or private transaction""

Form 4 Insider Transactions: What Each Field Means →

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^*

Corre Stephane

(Last) (First) (Middle)

300 EAST LOMBARD STREET

SUITE 1710

(Street)

BALTIMORE MARYLAND 21202

(City) (State) (Zip)

UNITED STATES

(Country)

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, AS&I

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/08/2026		S		5,000	D	$33.52(1)	62,313	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 $33.50 to $33.59, 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 Stephane Corre	05/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Stephane Corre report in this Form 4 for CSTM?

Stephane Corre reported an open-market sale of 5,000 Constellium SE ordinary shares. The sale occurred at a weighted average price of $33.52 per share, and he now directly holds 62,313 ordinary shares following the transaction.

At what price were the Constellium (CSTM) shares sold in this insider trade?

The shares were sold at a weighted average price of $33.52 per share. The footnote explains they were executed in multiple trades between $33.50 and $33.59, with full price-by-price details available on request from the company or the SEC.

How many Constellium SE (CSTM) shares does Stephane Corre own after this sale?

After selling 5,000 ordinary shares, Stephane Corre directly owns 62,313 Constellium SE ordinary shares. This figure reflects his remaining direct holdings reported as of the transaction date disclosed in the Form 4 filing with the SEC.

Was the Constellium (CSTM) insider transaction an open-market sale?

Yes. The Form 4 identifies the transaction as an open-market sale of ordinary shares. The sale used transaction code “S,” which denotes a sale in the open market or a private transaction under SEC reporting standards for insider trades.

Does the Form 4 for CSTM mention a weighted average price range?

Yes. The footnote states the reported price is a weighted average, with individual trades executed between $33.50 and $33.59 per share. The reporting person offers to provide detailed trade data upon request to Constellium, shareholders, or SEC staff.