CONSTELLIUM SE

For the period ended Mar 31, 2026. Filed Apr 29, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed Apr 29, 2026

CSTM$21.81+3.9%Stored close · as of Nov 6, 2026

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Contents

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company's Chief Executive Officer and Chief Financial Officer have evaluated the Company’s disclosure controls

and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended, at the end of

the period covered by this Quarterly Report, and they have concluded that these controls and procedures are effective.

Changes in Internal Control Over Financial Reporting

There have been no changes in internal control over financial reporting during the first quarter of 2026 that have

materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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