Constellium (NYSE: CSTM) executive trims stake with 5,000-share sale

Rhea-AI Filing Summary

CONSTELLIUM SE executive Stephane Corre, President of AS&I, sold 5,000 ordinary shares in an open-market transaction at a weighted average price of $32.04 per share. After this sale, he directly holds 67,313 ordinary shares.

Insider Trade Summary

Net Seller: 5,000 shares ($160,200)

Net Sell 1 txn

Insider Corre Stephane

Role President, AS&I

Sold 5,000 shs ($160K)

Type	Security	Shares	Price	Value
Sale	Ordinary shares	5,000	$32.04	$160K

Holdings After Transaction: Ordinary shares — 67,313 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 5,000 shares Weighted average sale price: $32.04 per share Post-transaction holdings: 67,313 shares +1 more

4 metrics

Shares sold 5,000 shares Open-market sale of ordinary shares

Weighted average sale price $32.04 per share Price for 5,000 shares sold

Post-transaction holdings 67,313 shares Directly held ordinary shares after sale

Sale price range $32.00–$32.11 Range of execution prices across multiple trades

Key Terms

open-market sale, Ordinary shares, weighted average price, Form 4

4 terms

open-market sale financial

"transaction_action: "open-market sale""

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.

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.

weighted average price financial

"The price reported is a weighted average price."

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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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)
05/01/2026

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	05/01/2026		S		5,000	D	$32.04(1)	67,313	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 $32.00 to $32.11, 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	05/04/2026
	** 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 do in this CONSTELLIUM SE (CSTM) Form 4 filing?

Stephane Corre reported an open-market sale of 5,000 CONSTELLIUM SE ordinary shares. The transaction reflects a disposition of stock by the company’s President, AS&I, and updates his directly held share balance in regulatory records.

How many CONSTELLIUM SE (CSTM) shares did Stephane Corre sell and at what price?

He sold 5,000 ordinary shares at a weighted average price of $32.04 per share. A footnote states individual trades occurred between $32.00 and $32.11, with detailed breakdowns available on request to the company or regulators.

How many CONSTELLIUM SE (CSTM) shares does Stephane Corre hold after the sale?

Following the reported sale, Stephane Corre directly holds 67,313 CONSTELLIUM SE ordinary shares. This figure comes from the Form 4’s post-transaction holdings field and shows his remaining direct equity position after the 5,000-share disposition.

What is meant by a weighted average price in this CONSTELLIUM SE Form 4?

Weighted average price means the 5,000 shares were sold in multiple trades at slightly different prices, averaged to $32.04. The filing notes transactions ranged from $32.00 to $32.11 per share, and detailed per-trade prices can be provided upon request.

Was the CONSTELLIUM SE (CSTM) transaction an open-market sale or something else?

The Form 4 classifies the transaction as an open-market sale of non-derivative ordinary shares. The transaction code “S” and description “Sale in open market or private transaction” indicate a standard market disposition rather than an option exercise or gift.