As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Constellium Se. The largest reported stake is Bpifrance Participations S.A.'s, at 6.2%. 10 filings are on record since July 17, 2025 (Schedule 13D/A, May 28, 2026).
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Key facts
- · Reporting person: Fmr LLC · Sole voting: 2,194,337 · Shared voting: 0 · Sole dispositive: 2,194,722 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-06
- · Holder: Bpifrance Participations S.A. · Percent: 6.2% · SCHEDULE 13D/A
- · Holder: Fmr LLC · Percent: 5.1% · SCHEDULE 13G/A
- · Holder: Millennium Management LLC · Percent: 2.5% · SCHEDULE 13G/A
- · Holder: Fmr LLC · Percent: 7.7% · SCHEDULE 13G/A
Constellium Se has 10 Schedule 13D or 13G filings on record since 2025-07-17. 2 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Bpifrance Participations S.A. | 6.2% | 8,403,903 | SCHEDULE 13D/A, 2026-05-28 | 2026-05-26 |
| BlackRock, Inc. | 5.8% | 8,274,063 | SCHEDULE 13G, 2025-07-17 | 2025-06-30 |
| T. Rowe Price Investment Management, Inc. | 4.5% | 6,274,993 | SCHEDULE 13G/A, 2025-09-08 | 2025-08-31 |
| Millennium Management LLC | 2.5% | 3,470,091 | SCHEDULE 13G/A, 2026-04-24 | 2026-03-31 |
| Fmr LLC | 1.6% | 2,194,722 | SCHEDULE 13G/A, 2026-08-06 | 2026-06-30 |
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More on Constellium Se and the records around it.
Constellium Se elsewhere on the record
Companies that share a holder
- Caisse des Depots (CDC) also filed stake reports on 4 other companies: Pasqal Holding SA (Sep 2026), Valneva SE (May 2026), DBV Technologies S.A. (Jan 2026)
- Millennium Management LLC also filed stake reports on 121 other companies: Catalyst Acquisition Corp. (Nov 2026), RxSight, Inc. (Nov 2026), Ares Acquisition Corporation III (Oct 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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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Fmr LLC | 2,194,337 | 0 | 2,194,722 | 0 | SCHEDULE 13G/A, 2026-08-06 |
| Abigail P. Johnson | 0 | 0 | 2,194,722 | 0 | SCHEDULE 13G/A, 2026-08-06 |
The latest filing identifies Constellium Se by CUSIP F21107101 and gives its principal executive office as WASHINGTON PLAZA, 40-44 RUE WASHINGTON, PARIS (SCHEDULE 13G/A, 2026-08-06).
Purpose of Transaction (Item 4)
Bpifrance Participations S.A.
Item 4 is hereby amended and supplemented as follows: On May 26, 2026, Bpifrance Participations sold 4,190,000 Ordinary Shares by two block trades each at $33.89 per share. All of the Ordinary Shares that are held of record by the Reporting Persons as reported herein were acquired for investment purposes. The Reporting Persons retain the right to change their investment intent, from time to time to acquire additional Ordinary Shares or other securities of the Issuer, or to sell or otherwise dispose of all or part of the Ordinary Shares or other securities of the Issuer, if any, beneficially owned by them, in any manner permitted by law. The Reporting Persons may engage from time to time in ordinary course transactions with financial institutions with respect to the securities described herein. Except as set forth above, none of the Reporting Persons currently has any plans or proposals which would be related to or would result in any of the matters described in Items 4(a)-(j) of the Instructions to Schedule 13D. However, as part of the ongoing evaluation of investment and investment alternatives, the Reporting Persons may consider such matters and, subject to applicable law, may formulate a plan with respect to such matters, and, from time to time, may hold discussions with or make formal proposals to management or the board of directors of the Issuer or other third parties regarding such matters.Item 4 of the SCHEDULE 13D/A filed 2026-05-28
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-17 | BlackRock, Inc. | 5.8% | SCHEDULE 13G |
| 2025-08-01 | Millennium Management LLC | 3.7% | SCHEDULE 13G/A |
| 2025-08-14 | T. Rowe Price Investment Management, Inc. | 10% | SCHEDULE 13G/A |
| 2025-09-08 | T. Rowe Price Investment Management, Inc. | 4.5% | SCHEDULE 13G/A |
| 2025-09-16 | Millennium Management LLC | 5.3% | SCHEDULE 13G |
| 2026-02-05 | Fmr LLC | 7.7% | SCHEDULE 13G/A |
| 2026-04-24 | Millennium Management LLC | 2.5% | SCHEDULE 13G/A |
| 2026-05-06 | Fmr LLC | 5.1% | SCHEDULE 13G/A |
| 2026-05-28 | Bpifrance Participations S.A. | 6.2% | SCHEDULE 13D/A |
| 2026-08-06 | Fmr LLC | 1.6% | SCHEDULE 13G/A |
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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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.