FMR discloses 7.7% SE (CSTM) stake in amended Schedule 13G

Rhea-AI Filing Summary

FMR LLC has filed an amended Schedule 13G reporting beneficial ownership of 10,569,283 Ordinary Shares of SE, representing 7.7% of the class as of December 31, 2025. FMR LLC holds sole voting power over 10,554,459 shares and sole dispositive power over 10,569,283 shares.

Abigail P. Johnson is reported with sole dispositive power over the same 10,569,283 shares, but no voting power. The filing states that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of SE. One or more other persons may receive dividends or sale proceeds, but no such person holds more than 5% of the outstanding Ordinary Shares.

Insights

Equity ownership analyst

FMR LLC reports a 7.7% passive stake in SE, signaling significant institutional ownership without a stated intent to influence control.

FMR LLC discloses beneficial ownership of 10,569,283 Ordinary Shares of SE, equal to 7.7% of the class as of December 31, 2025. It has sole voting power over 10,554,459 shares and sole dispositive power over 10,569,283 shares, indicating centralized control over how this block is voted and disposed.

Abigail P. Johnson is listed with sole dispositive power over the same 10,569,283 shares but no voting power, reflecting her control-person status rather than separate incremental ownership. The certification that the position is held in the ordinary course of business and not to change or influence control frames this as a passive institutional holding under Schedule 13G.

The filing notes that one or more other persons may receive dividends or sale proceeds from SE shares, but none exceeds 5% of the class. Subsequent ownership reports may show whether this 7.7% stake increases, decreases, or remains stable relative to this December 31, 2025 snapshot.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

CONSTELLIUM SE

(Name of Issuer)

Ordinary Shares

(Title of Class of Securities)

F21107101

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. F21107101

1

Names of Reporting Persons

FMR LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 10,554,459.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 10,569,283.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,569,283.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.7 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. F21107101

1

Names of Reporting Persons

Abigail P. Johnson

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 10,569,283.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,569,283.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CONSTELLIUM SE
(b)	Address of issuer's principal executive offices: WASHINGTON PLAZA,40-44 RUE WASHINGTON,PARIS,I0,75008
Item 2.
(a)	Name of person filing: FMR LLC
(b)	Address or principal business office or, if none, residence: 245 Summer Street, Boston, Massachusetts 02210
(c)	Citizenship: Not applicable
(d)	Title of class of securities: Ordinary Shares
(e)	CUSIP No.: F21107101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 10569283.00
(b)	Percent of class: 7.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Please see the responses to Items 5 and 6 on the cover page.
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 10569283.00
	(iv) Shared power to dispose or to direct the disposition of: 0.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. One or more other persons are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Ordinary Shares of CONSTELLIUM SE. No one other person's interest in the Ordinary Shares of CONSTELLIUM SE is more than five percent of the total outstanding Ordinary Shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See attached Exhibit 99.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

FMR LLC

Signature:	Stephanie J. Brown
Name/Title:	Duly authorized under Power of Attorney effective as of January 3, 2023, by and on behalf of FMR LLC and its direct and indirect subsidiaries*
Date:	02/04/2026

Abigail P. Johnson

Signature:	Stephanie J. Brown
Name/Title:	Duly authorized under Power of Attorney effective as of January 26, 2023, by and on behalf of Abigail P. Johnson**
Date:	02/04/2026

Comments accompanying signature: * This power of attorney is incorporated herein by reference to Exhibit 24 to the Schedule 13G filed by FMR LLC on January 10, 2023, accession number: 0000315066-23-000003. ** This power of attorney is incorporated herein by reference to Exhibit 24 to the Schedule 13G filed by FMR LLC on January 31, 2023, accession number: 0000315066-23-000038.

Exhibit Information

Please see Exhibit 99 for 13d-1(k) (1) agreement.

FAQ

How many SE ordinary shares does FMR LLC beneficially own in this Schedule 13G/A?

FMR LLC reports beneficial ownership of 10,569,283 Ordinary Shares of SE. This block represents a sizable institutional position and gives FMR LLC significant influence over voting and disposition decisions for these shares within the limits described in the filing.

What percentage of SE’s ordinary shares is held by FMR LLC according to this filing for CSTM investors?

FMR LLC states that it beneficially owns 7.7% of SE’s outstanding Ordinary Shares as of December 31, 2025. This percentage reflects its 10,569,283-share position relative to the total class, indicating a substantial but non-controlling institutional stake.

Does the FMR LLC Schedule 13G/A indicate any intent to influence control of SE?

The filing specifies that SE securities held by FMR LLC were acquired and are held in the ordinary course of business. It further states they were not acquired and are not held for the purpose of changing or influencing the control of SE, characterizing the stake as passive.

What voting and dispositive powers over SE shares does FMR LLC report in this document?

FMR LLC reports sole voting power over 10,554,459 SE Ordinary Shares and sole dispositive power over 10,569,283 shares. It reports no shared voting or shared dispositive power, concentrating authority for this position within the FMR complex.

How is Abigail P. Johnson’s interest in SE described in the Schedule 13G/A for CSTM followers?

Abigail P. Johnson is listed with sole dispositive power over 10,569,283 SE Ordinary Shares and no voting power. This mirrors the total beneficial ownership reported, reflecting her role as a control person of FMR LLC rather than a separate additional share position.

Do other parties share in dividends or proceeds from FMR LLC’s SE holdings?

The filing notes that one or more other persons may have rights to receive dividends or sale proceeds from SE shares. However, it clarifies that no single such person’s interest relates to more than 5% of the total outstanding Ordinary Shares.