# EDGAR Filing Document

**Accession Number:** 0001563411
**File Stem:** 0001563411-26-000176
**Filing Date:** 2026-5
**Character Count:** 6832
**Document Hash:** 10de9f85da88d4b18bcb937f6dd1af67
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001563411-26-000176.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0001563411-26-000176

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CONSTELLIUM SE
- **CENTRAL INDEX KEY:** 0001563411
- **STANDARD INDUSTRIAL CLASSIFICATION:** SECONDARY SMELTING & REFINING OF NONFERROUS METALS [3341]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35931
- **FILM NUMBER:** 261030136

**BUSINESS ADDRESS:**
- **STREET 1:** WASHINGTON PLAZA
- **STREET 2:** 40-44 RUE WASHINGTON
- **CITY:** PARIS
- **STATE:** I0
- **ZIP:** 75008
- **BUSINESS PHONE:** 33-1-73-01-46-51

**MAIL ADDRESS:**
- **STREET 1:** WASHINGTON PLAZA
- **STREET 2:** 40-44 RUE WASHINGTON
- **CITY:** PARIS
- **STATE:** I0
- **ZIP:** 75008

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Constellium SE
- **DATE OF NAME CHANGE:** 20190628

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Constellium N.V.
- **DATE OF NAME CHANGE:** 20130521

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Constellium Holdco B.V.
- **DATE OF NAME CHANGE:** 20121130

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**Form SD**

**SPECIALIZED DISCLOSURE REPORT**

**CONSTELLIUM SE**

**(Exact Name of Registrant as Specified in Charter)**

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| | | |
|:---|:---|:---|
| **France** | **001-35931** | **98-0667516** |
| **(State or Other Jurisdiction**<br>**of Incorporation or Organization)**<br>| **(Commission** <br>**File Number)** | **(I.R.S. Employer**<br>**Identification No.)**<br>|
| **300 East Lombard Street**<br>**Suite 1710**<br>**Baltimore, MD 21202**<br>**United States** | **300 East Lombard Street**<br>**Suite 1710**<br>**Baltimore, MD 21202**<br>**United States** | **300 East Lombard Street**<br>**Suite 1710**<br>**Baltimore, MD 21202**<br>**United States** |
|  | **(Address of Principal Executive Office (US), including zip code)** |  |

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**Kristine Carpenter** 

**Vice President, Legal and Assistant Corporate Secretary 443-420-7861**

**(Name and telephone number, including area code, of the** 

**person to contact in connection with this report.)**

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the

information in this form applies:

☒Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, 2025.

**Section 1 – Conflict Minerals Disclosure**

**Item 1.01 Conflict Minerals Disclosure and Report**

**Conflict Minerals Disclosure**

This Form SD of Constellium SE and its subsidiaries (the "Company") is filed pursuant to Rule 13p-1 under the Securities Exchange

Act of 1934, as amended (the "Rule"), for the year ended December 31, 2025.

The Rule requires disclosure of certain information when a company manufactures, or contracts to manufacture, products for which

minerals specified in the Rule are necessary to the functionality or production of those products. The specified minerals are cassiterite,

columbite-tantalite, wolframite and gold, including their derivatives, which are limited to tin, tantalum and tungsten ("3TG"). The

"Covered Countries" for the purposes of the Rule are the Democratic Republic of the Congo or an adjoining country, meaning a

country which shares an internationally recognized border with the Democratic Republic of the Congo, including the Republic of the

Congo, the Central African Republic, South Sudan, Uganda, Rwanda, Burundi, Tanzania, Zambia and Angola.

The Company determined that in 2025, it manufactured, or contracted to manufacture, products for which 3TG are necessary (such

3TG, the "Necessary 3TG") to the functionality or production of the product ("Covered Products"). The Company determined that

Covered Products represent a minuscule amount (less than 1%) of the Company's products manufactured in 2025. As a result of this

determination, the Company conducted a good faith reasonable country of origin inquiry ("RCOI") regarding the source of the

Necessary 3TG in the Covered Products. The RCOI was reasonably designed to determine whether the Necessary 3TG found in the

Covered Products originated in the Covered Countries or are from recycled or scrap sources. Based on the RCOI, the Company

determined that the Necessary 3TG did not originate in the Covered Countries or come from recycled or scrap sources.

The Company's RCOI included the following steps: identification of the suppliers of the Necessary 3TG contained in the Company's

products; identification and information gathering from suppliers; and an assessment to determine whether further due diligence was

required.

*•Identification of the suppliers*: The Company identified the direct suppliers of the Necessary 3TG contained in the

Covered Products (the "First-Tier Suppliers").

*•Identification and information gathering from suppliers*: The Company requested that the First-Tier Suppliers provide

information regarding their suppliers of the Necessary 3TG. The First-Tier Suppliers identified their upstream suppliers. The

upstream suppliers confirmed in writing either that they do not source the Necessary 3TG from the Covered Countries or that

the Necessary 3TG used are from recycled or scrap sources. All upstream suppliers responded to the inquiries made by the

First-Tier Suppliers, and the Company received responses from all First-Tier Suppliers.

*•Assessment*: The Company reviewed the documentation provided by the suppliers to assess the adequacy of such materials.

Based on the data collected by the Company through the RCOI, the Company reasonably believes that the Necessary 3TG used in the

Covered Products either did not come from the Covered Countries or came from recycled or scrap sources. Accordingly, the Company

determined that no additional due diligence measures were required to be taken.

This information is also publicly available at: https://www.constellium.com/about-constellium/governance. The content of any

website referred to in this Form SD is included for general information only and is not incorporated by reference in this Form SD.

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf

by the duly authorized undersigned.

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| | | |
|:---|:---|:---|
|  | **CONSTELLIUM SE** | **CONSTELLIUM SE** |
|  | (Registrant) | (Registrant) |
| May 28, 2026 | By: | /s/ Jack Guo |
|  | Name: | Jack Guo |
|  | Title: | Executive Vice President &<br>Chief Financial Officer<br>|

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