As of November 6, 2026, Constellium SE is a publicly traded company (NYSE: CSTM). The largest holder reporting an active stake on Schedule 13D is Bpifrance Participations S.A., at 6.2%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include BlackRock (5.8%) (Schedule 13D/A, May 28, 2026).
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Is Constellium SE a real, registered company?
- Constellium Se files with the SEC under CIK 1563411 (its SEC filings).
- Its shares are listed under the ticker CSTM on NYSE (SEC company record).
- business address in Paris, I0, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under CONSTELLIUM SE in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Bpifrance Participations S.A. (filed 2026-05-28).
Who are Constellium SE's owners and officers?
Constellium SE: business address in Paris, I0; industry Secondary Smelting & Refining of Nonferrous Metals (Schedule 13G/A, 2026-08-06).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-06 | Fmr LLC | 1.6% |
| Schedule 13D/A, 2026-05-28 | Bpifrance Participations S.A. | 6.2% |
| Schedule 13G/A, 2026-05-06 | Fmr LLC | 5.1% |
| Schedule 13G/A, 2026-04-24 | Millennium Management LLC | 2.5% |
| Schedule 13G/A, 2026-02-05 | Fmr LLC | 7.7% |
| Schedule 13G, 2025-09-16 | Millennium Management LLC | 5.3% |
| Schedule 13G/A, 2025-09-08 | T. Rowe Price Investment Management, Inc. | 4.5% |
| Schedule 13G/A, 2025-08-14 | T. Rowe Price Investment Management, Inc. | 10% |
| Schedule 13G/A, 2025-08-01 | Millennium Management LLC | 3.7% |
| Schedule 13G, 2025-07-17 | Blackrock, Inc. | 5.8% |
Questions about who owns Constellium SE
Who owns Constellium SE?
On this page, 2 holders' latest ownership filings report 5% or more of Constellium SE: Bpifrance Participations S.A. (6.2%, Schedule 13D/A, filed 2026-05-28) and Blackrock, Inc. (5.8%, Schedule 13G, filed 2025-07-17).
Who are the largest shareholders of Constellium SE?
By the share each holder's latest filing reports, the largest holders of Constellium SE on this page are Bpifrance Participations S.A. (6.2%) and Blackrock, Inc. (5.8%).
When did Bpifrance Participations S.A. buy into Constellium SE?
The filings give report dates, not purchase dates. The earliest filing from Bpifrance Participations S.A. on this page is the Schedule 13D/A, filed 2026-05-28, reporting 6.2%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 10 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Constellium SE shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and a director: 406,464 shares (0.30% of shares outstanding) (Form 4, 2026-07-13).
- , the chief technology officer and senior vice president manuf excellence: 241,713 shares (0.18% of shares outstanding) (Form 4, 2026-05-13).
- , a director: 211,741 shares (0.16% of shares outstanding), 97,741 held directly and 114,000 indirectly (Form 3, 2026-01-02).
- , the chief financial officer and executive vice president: 185,368 shares (0.14% of shares outstanding) (Form 4, 2026-05-07).
- , the senior vice president and chro: 172,149 shares (0.13% of shares outstanding) (Form 4, 2026-05-04).
Shares outstanding: 134,536,604 as of 2026-09-30, from the company's latest SEC cover page.
How much has Constellium SE raised?
No fundraising or offering filing from Constellium SE is on file with us.
Keep reading
More on Constellium SE and the records around it.
Constellium SE elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Caisse des Depots (CDC) also filed stake reports on 4 other companies: Cellectis S.A. (Nov 2026), Pasqal Holding SA (Sep 2026), Valneva SE (May 2026)
- Millennium Management LLC also filed stake reports on 121 other companies: StepStone Group Inc. (Nov 2026), Catalyst Acquisition Corp. (Nov 2026), RxSight, Inc. (Nov 2026)
- T. Rowe Price Investment Management, Inc. also filed stake reports on 167 other companies: CABALETTA BIO INC (Nov 2026), MADISON SQUARE GARDEN SPORTS CORP (Nov 2026), MSG RANGERS CORP (Nov 2026)
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