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; 389 institutions reported holding it in 13F filings for Q2 2026, worth $3.85B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Constellium SE as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 315
- +66 vs. Q4 2025
- Shares held
- 126.0M
- +5.79M (+4.8%) vs. Q4 2025
- Total value
- $3.08B
- +$815.3M (+36.0%) vs. Q4 2025
- New holders
- 88
- 113 more added
- Sold out
- 22
- 85 more reduced
4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CSTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 389 | $3.85B |
| Q1 2026 | 315 | $3.08B |
| Q4 2025 | 253 | $2.34B |
| Q3 2025 | 237 | $1.91B |
| Q2 2025 | 224 | $1.76B |
| Q1 2025 | 220 | $1.33B |
| Q4 2024 | 219 | $1.39B |
| Q3 2024 | 222 | $2.21B |
| Q2 2024 | 224 | $2.58B |
| Q1 2024 | 207 | $3.04B |
| Q4 2023 | 193 | $2.67B |
| Q3 2023 | 191 | $2.46B |
| Q2 2023 | 187 | $2.34B |
| Q1 2023 | 183 | $2.04B |
| Q4 2022 | 185 | $1.57B |
| Q3 2022 | 179 | $1.35B |
| Q2 2022 | 189 | $1.76B |
| Q1 2022 | 183 | $2.36B |
| Q4 2021 | 161 | $2.27B |
| Q3 2021 | 162 | $2.39B |
| Q2 2021 | 153 | $2.46B |
| Q1 2021 | 135 | $1.80B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Constellium SE; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Healthcare of Ontario Pension Plan Trust Fund | 2,056,336 | $50.5M | 0.08% | +1,849,554+894.4% | Added |
| AQR Capital Management LLC | 2,074,861 | $51.0M | 0.02% | +308,358+17.5% | Added |
| American Century Companies Inc | 2,085,479 | $51.3M | 0.03% | +274,135+15.1% | Added |
| Encompass Capital Advisors LLC | 2,477,278 | $60.9M | 2.48% | −2,180,637−46.8% | Reduced |
| State Street Corp | 2,763,495 | $67.9M | 0.00% | +102,977+3.9% | Added |
| Nuveen, LLC | 2,827,731 | $69.5M | 0.02% | −13,230−0.5% | Reduced |
| Morgan Stanley | 3,196,054 | $78.6M | 0.00% | −532,064−14.3% | Reduced |
| Arrowstreet Capital, Limited Partnership | 3,228,027 | $79.3M | 0.04% | +2,780,260+620.9% | Added |
| D. E. Shaw & Co., Inc. | 3,234,576 | $79.5M | 0.06% | +179,285+5.9% | Added |
| Millennium Management LLC | 3,470,091 | $85.3M | 0.06% | −2,799,778−44.7% | Reduced |
| Vanguard Portfolio Management LLC | 3,927,097 | $96.5M | 0.01% | +3,927,097 | New |
| T. Rowe Price Investment Management, Inc. | 3,960,819 | $97.4M | 0.07% | −373,908−8.6% | Reduced |
| FMR LLC | 6,961,768 | $171.1M | 0.01% | −3,607,515−34.1% | Reduced |
| Bpifrance SA | 12,593,903 | $309.6M | 18.71% | 00.0% | Unchanged |
| BlackRock, Inc. | 12,964,203 | $318.7M | 0.01% | −766,091−5.6% | Reduced |
| Nut Tree Capital Management, LP | 0 | $0 | 0.00% | −3,225,000−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −1,194,936−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −671,222−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −496,715−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −470,813−100.0% | Sold out |
| Hotchkis & Wiley Capital Management LLC | 0 | $0 | 0.00% | −448,180−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −300,000−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −59,500−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −35,285−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −24,466−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −18,089−100.0% | Sold out |
| Aristides Capital LLC | 0 | $0 | 0.00% | −15,659−100.0% | Sold out |
| nVerses Capital, LLC | 0 | $0 | 0.00% | −15,298−100.0% | Sold out |
| Polymer Capital Management (US) LLC | 0 | $0 | 0.00% | −15,200−100.0% | Sold out |
| Belpointe Asset Management LLC | 0 | $0 | 0.00% | −11,920−100.0% | Sold out |
| Baader Bank INC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −7,581−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −4,313−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −1,032−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −60−100.0% | Sold out |
| SWAN Capital LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| EMC Capital Management | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |