Constellium SE SEC filings CSTM
Constellium SE has 507 filings in SEC EDGAR's recent list, going back to Dec 3, 2012. Its latest annual report, Form ARS, was filed on Apr 10, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Nov 2, 2026 |
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2026 | Oct 28, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| 4 | Insider transaction | Aug 3, 2026 | Aug 3, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2026 | Jul 29, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 10, 2026 |
| S-3ASR | Automatic shelf registration | Jun 24, 2026 | — |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 4 | Insider transaction | Jun 1, 2026 | May 28, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 28, 2026 | — |
| 144 | Notice of proposed sale | May 28, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2026 | — |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2026 | May 21, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 8, 2026 |
| 144 | Notice of proposed sale | May 11, 2026 | — |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 144 | Notice of proposed sale | May 7, 2026 | — |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 6, 2026 | — |
| 144 | Notice of proposed sale | May 5, 2026 | — |
| 4 | Insider transaction | May 5, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 4 | Insider transaction | May 1, 2026 | May 1, 2026 |
| 10-Q | Quarterly report | Apr 29, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2026 | Apr 29, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 24, 2026 | — |
| ARS | Annual report to shareholders | Apr 10, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 10, 2026 | — |
| DEF 14A | Proxy statement | Apr 10, 2026 | Dec 31, 2025 |
| 3 | Initial insider ownership | Apr 9, 2026 | Apr 1, 2026 |
| PRE 14A | Preliminary proxy statement | Mar 30, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 2, 2026 |
| 144 | Notice of proposed sale | Mar 16, 2026 | — |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 8-K |
Current report
Other events
|
Mar 12, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 3/A | Form 3/a | Mar 11, 2026 | Jan 1, 2026 |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 144 | Notice of proposed sale | Mar 9, 2026 | — |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 144 | Notice of proposed sale | Mar 4, 2026 | — |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 144 | Notice of proposed sale | Feb 27, 2026 | — |
| 4 | Insider transaction | Feb 27, 2026 | Feb 26, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 144 | Notice of proposed sale | Feb 26, 2026 | — |
| 10-K | Annual report | Feb 25, 2026 | Dec 31, 2025 |
| 144 | Notice of proposed sale | Feb 25, 2026 | — |
| 144 | Notice of proposed sale | Feb 24, 2026 | — |
| 4 | Insider transaction | Feb 24, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 24, 2026 | Feb 23, 2026 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2026 | Feb 18, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 3 | Initial insider ownership | Jan 2, 2026 | Jan 1, 2026 |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2025 | Oct 29, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 29, 2025 | Oct 29, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 16, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Sep 8, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 1, 2025 | — |
| 10-Q | Quarterly report | Jul 31, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2025 | Jul 29, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 17, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 30, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 22, 2025 | May 15, 2025 |
| 10-Q | Quarterly report | Apr 30, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2025 | Apr 30, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 29, 2025 | — |
| 8-K |
Current report
Other events
|
Apr 15, 2025 | Apr 15, 2025 |
| 10-K/A | Amended annual report | Apr 15, 2025 | Dec 31, 2024 |
| 10-K | Annual report | Feb 28, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 20, 2025 | Feb 20, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 15, 2025 | Jan 15, 2025 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| 6-K | Current report (foreign issuer) | Oct 23, 2024 | Oct 23, 2024 |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 6-K | Current report (foreign issuer) | Aug 27, 2024 | Aug 27, 2024 |
| 6-K | Current report (foreign issuer) | Jul 25, 2024 | Jul 25, 2024 |
| 6-K | Current report (foreign issuer) | Jul 24, 2024 | Jul 24, 2024 |
| 6-K | Current report (foreign issuer) | Jul 23, 2024 | Jun 30, 2024 |
| 6-K | Current report (foreign issuer) | Jul 23, 2024 | Jul 23, 2024 |
| 6-K | Current report (foreign issuer) | Jul 3, 2024 | Jul 3, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 6, 2024 | — |
| 144 | Notice of proposed sale | Jun 4, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2024 | — |
| S-8 | Employee stock plan registration | May 16, 2024 | — |
| 6-K | Current report (foreign issuer) | May 14, 2024 | May 14, 2024 |
| 6-K | Current report (foreign issuer) | Apr 24, 2024 | Apr 24, 2024 |
| 6-K | Current report (foreign issuer) | Apr 12, 2024 | Apr 12, 2024 |
| F-3ASR | Filing | Mar 20, 2024 | — |
| 20-F | Annual report (foreign issuer) | Mar 18, 2024 | Dec 31, 2023 |
| UPLOAD | Letter from the SEC | Mar 5, 2024 | — |
| CORRESP | Letter to the SEC | Mar 1, 2024 | — |
| 6-K | Current report (foreign issuer) | Feb 21, 2024 | Feb 21, 2024 |
| UPLOAD | Letter from the SEC | Feb 19, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2024 | — |
| CORRESP | Letter to the SEC | Dec 20, 2023 | — |
| CORRESP | Letter to the SEC | Nov 29, 2023 | — |
| UPLOAD | Letter from the SEC | Nov 21, 2023 | — |
| CORRESP | Letter to the SEC | Oct 30, 2023 | — |
| 6-K | Current report (foreign issuer) | Oct 25, 2023 | Oct 25, 2023 |
| 6-K | Current report (foreign issuer) | Oct 5, 2023 | Oct 4, 2023 |
| CORRESP | Letter to the SEC | Oct 4, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 10, 2023 | — |
| 6-K | Current report (foreign issuer) | Jul 27, 2023 | Jun 30, 2023 |
| 6-K | Current report (foreign issuer) | Jul 26, 2023 | Jul 26, 2023 |
| 6-K | Current report (foreign issuer) | Jul 18, 2023 | Jul 18, 2023 |
| 6-K | Current report (foreign issuer) | Jun 20, 2023 | Jun 20, 2023 |
| 6-K | Current report (foreign issuer) | Jun 15, 2023 | Jun 15, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 31, 2023 | — |
| 6-K | Current report (foreign issuer) | May 24, 2023 | May 24, 2023 |
| 6-K | Current report (foreign issuer) | Apr 26, 2023 | Apr 26, 2023 |
| 20-F | Annual report (foreign issuer) | Mar 14, 2023 | Dec 31, 2022 |
| 6-K | Current report (foreign issuer) | Feb 22, 2023 | Feb 22, 2023 |
| 6-K | Current report (foreign issuer) | Feb 16, 2023 | Feb 16, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 3, 2023 | — |
| 6-K | Current report (foreign issuer) | Oct 26, 2022 | Oct 26, 2022 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Secondary Smelting & Refining of Nonferrous Metals (SIC 3341)
- Listed as
- CSTM (NYSE)
- Fiscal year ends
- December 31
- Headquarters
- Paris, France
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1563411
- Former names
- Constellium N.V. (until Jun 28, 2019); Constellium Holdco B.V. (until May 17, 2013)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.