Constellium SE
CSTM- Exchange
- NYSE
- Industry
- Secondary Smelting & Refining of Nonferrous Metals
- SEC CIK
- 0001563411
In the last 90 days, Constellium SE insiders filed 1 open-market purchase and 0 sales; 393 institutions reported holding it in 13F filings for Q2 2026, worth $3.86B in total; no superinvestor holds it.
Holders of 5% or more of CSTM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Constellium SE, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Bpifrance Participations SA | 13D/A | 6.20%8.40M shares | – | Aug 10, 20233 filings | May 28, 2026 | SEC |
| BlackRock, Inc. | 13G | 5.80%8.27M shares | +0.80 ppfrom 5.00% | Oct 22, 20244 filings | Jul 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
34 Schedule 13D and 13G filings on Constellium SE, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 6, 202610:17 AM ET | FMR LLCand 1 other | 13G/A | 1.60%2.19M shares | −3.50 ppfrom 5.10%Below 5% | Jun 30, 2026 | SEC |
| May 28, 20264:01 PM ET | Bpifrance Participations SAand 3 others | 13D/A | 6.20%8.40M shares | – | May 26, 2026 | SEC |
| May 6, 202611:13 AM ET | FMR LLCand 1 other | 13G/A | 5.10%6.96M shares | −2.60 ppfrom 7.70% | Mar 31, 2026 | SEC |
| Apr 24, 20265:11 PM ET | Millennium Management LLCand 2 others | 13G/A | 2.50%3.47M shares | −2.80 ppfrom 5.30%Below 5% | Mar 31, 2026 | SEC |
| Feb 5, 20261:20 PM ET | FMR LLCand 1 other | 13G/A | 7.70%10.6M shares | – | Dec 31, 2025 | SEC |
| Sep 16, 20254:17 PM ET | Millennium Management LLCand 2 others | 13G | 5.30%7.45M shares | +1.60 ppfrom 3.70% | Sep 10, 2025 | SEC |
| Sep 8, 20251:36 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 4.50%6.27M shares | −5.50 ppfrom 10.00%Below 5% | Aug 31, 2025 | SEC |
| Aug 14, 202512:12 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 10.00%14.3M shares | −3.50 ppfrom 13.50% | Jun 30, 2025 | SEC |
| Aug 1, 20254:28 PM ET | Millennium Management LLCand 2 others | 13G/A | 3.70%5.12M shares | −1.40 ppfrom 5.10%Below 5% | Jun 30, 2025 | SEC |
| Jul 17, 20257:44 PM ET | BlackRock, Inc. | 13G | 5.80%8.27M shares | +0.80 ppfrom 5.00% | Jun 30, 2025 | SEC |
| May 30, 20254:06 PM ET | Millennium Management LLCand 2 others | 13G | 5.10%7.23M shares | New | May 28, 2025 | SEC |
| Apr 29, 202511:55 AM ET | BlackRock, Inc. | 13G/A | 5.00%7.17M shares | – | Mar 31, 2025 | SEC |
| Feb 14, 20259:45 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 13.50%19.8M shares | – | Dec 31, 2024 | SEC |
| Nov 14, 2024 | T. Rowe Price Investment Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Nov 14, 2024 | Janus Henderson Group PLC | 13G/AOld format | – | – | – | SEC |
| Nov 8, 2024 | BlackRock, Inc. | 13GOld format | – | – | – | SEC |
| Oct 22, 2024 | BlackRock, Inc. | 13GOld format | – | New | – | SEC |
| Jun 6, 2024 | Bpifrance Participations SA | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2024 | T. Rowe Price Investment Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Janus Henderson Group PLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 6, 20249:36 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Aug 10, 2023 | Bpifrance Participations SA | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2023 | T. Rowe Price Investment Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Janus Henderson Group PLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | FMR LLC | 13GOld format | – | New | – | SEC |
| Feb 3, 20234:27 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Aug 10, 2022 | T. Rowe Price Investment Management, Inc. | 13GOld format | – | New | – | SEC |
| Aug 10, 2022 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Janus Henderson Group PLC | 13G/AOld format | – | – | – | SEC |
| Feb 4, 20224:12 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
| Feb 16, 2021 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Janus Henderson Group PLC | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
25 notices from officers, directors and other affiliates planning to sell Constellium SE shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Jun 4, 20266:21 PM ET | Ormerod JohnDirector | 8.00K | $278.4K | Jun 4, 2026 | Brown Shipley | SEC |
| May 28, 202612:47 PM ET | Marcus BeckerAffiliate | 10.4K | $363.0K | May 28, 2026 | J.P. Morgan Securities LLC | SEC |
| May 26, 20267:59 PM ET | Bpifrance Participations SAMay be deemed an affiliate | 4.19M | $139.3M | May 26, 2026 | BNP Paribas Securities Corp. | SEC |
| May 14, 20262:27 PM ET | Martin Roy JarrettAffiliate | 4.72K | $157.8K | May 14, 2026 | J.P. Morgan Securities LLC | SEC |
| May 11, 20263:41 PM ET | Nicolas BrunAffiliate | 26.7K | $902.6K | May 11, 2026 | J.P. Morgan Securities LLC | SEC |
| May 8, 20263:14 PM ET | Stephane CorreAffiliate | 5.00K | $167.6K | May 8, 2026 | J.P. Morgan Securities LLC | SEC |
| May 7, 20263:39 PM ET | Brandjes MichielDirector | 10.4K | $336.4K | May 5, 2026 | ING Bank NV | SEC |
| May 5, 20264:14 PM ET | Jack GuoOfficer | 25.2K | $822.3K | May 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 1, 20263:14 PM ET | Philippe HoffmannAffiliate | 50.0K | $1.60M | May 1, 2026 | J.P. Morgan Securities LLC | SEC |
| May 1, 20263:04 PM ET | Stephane CorreAffiliate | 5.00K | $160.2K | May 1, 2026 | J.P. Morgan Securities LLC | SEC |
| May 1, 20262:52 PM ET | Ryan JurkovicAffiliate | 48.8K | $1.56M | May 1, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 16, 20264:16 PM ET | Marcus BeckerAffiliate | 10.0K | $250.9K | Mar 16, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20264:17 PM ET | Stephane CorreAffiliate | 1.50K | $38.8K | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20262:17 PM ET | Ryan JurkovicAffiliate | 29.9K | $773.6K | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20262:13 PM ET | Jack GuoAffiliate | 41.7K | $1.08M | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20262:10 PM ET | Ingrid JoergAffiliate | 4.61K | $119.4K | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20262:06 PM ET | Philippe HoffmannAffiliate | 4.73K | $122.3K | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 10, 20262:03 PM ET | Marcus BeckerAffiliate | 1.11K | $28.8K | Mar 10, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 9, 20263:53 PM ET | Nicolas BrunAffiliate | 17.7K | $436.7K | Mar 9, 2026 | J.P. Morgan Securities LLC | SEC |
| Mar 4, 20264:06 PM ET | Philippe HoffmannAffiliate | 80.0K | $2.12M | Mar 4, 2026 | J.P. Morgan Securities LLC | SEC |
| Feb 27, 20263:24 PM ET | Stephane CorreAffiliate | 3.00K | $74.1K | Feb 27, 2026 | J.P. Morgan Securities LLC | SEC |
| Feb 26, 20261:00 PM ET | Stephane CorreAffiliate | 3.20K | $82.3K | Feb 25, 2026 | J.P. Morgan Securities LLC | SEC |
| Feb 25, 20264:24 PM ET | Boccon-Gibod IsabelleDirector | 10.0K | $257.7K | Feb 25, 2026 | Charles Schwab Corp. | SEC |
| Feb 24, 20266:31 PM ET | Becker MarcusOfficer | 15.6K | $25.58 | Feb 20, 2026 | Global Shares Execution Services Limited | SEC |
| Jun 4, 20247:47 PM ET | Bpifrance Participations SA10% stockholder | 3.80M | $82.3M | Jun 5, 2024 | BNP Paribas Securities Corp. | SEC |