Latest Period
Q4 2025
Security Snapshot
CONSTELLIUM SE - Ordinary Shares (CSTM) Institutional Ownership
CUSIP: F21107101
13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026
Institutions Reporting
249
Shares (Excl. Options)
122,557,522
Price
$18.85
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- Type / Class
- Equity / Ordinary Shares
- Symbol
- CSTM on NYSE
- Shares outstanding
- 136,505,250
- Price per share
- $24.58
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 122,557,522
- Total reported value
- $2,310,215,599
- % of total 13F portfolios
- 0.01%
- Share change
- -5,790,487
- Value change
- -$97,652,833
- Number of holders
- 249
- Price from insider filings
- $24.58
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- CSTM - CONSTELLIUM SE - Ordinary Shares is tracked under CUSIP F21107101.
- 249 institutions reported positions in Q4 2025.
- 4 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 249 to 149 between Q4 2025 and Q1 2026.
- Reported value moved from $2,310,215,599 to $866,914,377.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 249 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP F21107101?
CUSIP F21107101 identifies CSTM - CONSTELLIUM SE - Ordinary Shares in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP F21107101:
Significant Owners of CONSTELLIUM SE - Ordinary Shares (CSTM) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 5.8% | +16% | $110,045,038 | +$14,694,811 | 8,274,063 | +15% | BlackRock, Inc. | 30 Jun 2025 |
| FMR LLC | 5.1% | -32% | $171,120,252 | -$88,672,719 | 6,961,768 | -34% | FMR LLC | 31 Mar 2026 |
| T. Rowe Price Investment Management, Inc. | 4.5% | -55% | $85,590,905 | -$109,593,690 | 6,274,993 | -56% | T. Rowe Price Investment Management, Inc. | 31 Aug 2025 |
| MILLENNIUM MANAGEMENT LLC | 2.5% | -56% | $85,294,837 | -$97,918,830 | 3,470,091 | -53% | Millennium Management LLC | 31 Mar 2026 |
As of 31 Dec 2025, 249 institutional investors reported holding 122,557,522 shares of CONSTELLIUM SE - Ordinary Shares (CSTM). This represents 90% of the company’s total 136,505,250 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of CONSTELLIUM SE - Ordinary Shares (CSTM) together control 67% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10% | 13,730,294 | -2.1% | 0% | $258,816,041 |
| Bpifrance SA | 9.2% | 12,593,903 | 0% | 10% | $237,395,072 |
| FMR LLC | 7.7% | 10,569,283 | -22% | 0.01% | $199,230,985 |
| MILLENNIUM MANAGEMENT LLC | 4.6% | 6,269,869 | -9.6% | 0.08% | $118,187,031 |
| Encompass Capital Advisors LLC | 3.4% | 4,657,915 | +9.2% | 4.2% | $87,801,698 |
| T. Rowe Price Investment Management, Inc. | 3.2% | 4,334,727 | -15% | 0.05% | $81,710,000 |
| VANGUARD GROUP INC | 3% | 4,054,982 | +23% | 0% | $76,436,410 |
| MORGAN STANLEY | 2.7% | 3,728,118 | +48% | 0% | $70,275,043 |
| Nut Tree Capital Management, LP | 2.4% | 3,225,000 | -38% | 11% | $60,791,250 |
| D. E. Shaw & Co., Inc. | 2.2% | 3,055,291 | +25% | 0.04% | $57,592,236 |
| Nuveen, LLC | 2.1% | 2,840,961 | -0.32% | 0.01% | $53,552,114 |
| STATE STREET CORP | 1.9% | 2,660,518 | +3.6% | 0% | $50,150,764 |
| JPMORGAN CHASE & CO | 1.5% | 2,089,412 | -13% | 0% | $39,385,416 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.4% | 1,944,239 | 0% | 0.06% | $36,649,000 |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | 1.3% | 1,842,000 | +13% | 14% | $34,721,700 |
| AMERICAN CENTURY COMPANIES INC | 1.3% | 1,811,344 | +55% | 0.02% | $34,143,834 |
| AQR CAPITAL MANAGEMENT LLC | 1.3% | 1,766,503 | +38% | 0.02% | $33,298,578 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2% | 1,631,574 | -4.5% | 0% | $30,751,882 |
| GOLDMAN SACHS GROUP INC | 1% | 1,367,485 | +13% | 0% | $25,777,092 |
| Soapstone Management L.P. | 0.99% | 1,350,000 | -19% | 19% | $25,447,500 |
| BEACONLIGHT CAPITAL, LLC | 0.98% | 1,339,934 | +5.2% | 15% | $25,257,756 |
| CAPSTONE INVESTMENT ADVISORS, LLC | 0.88% | 1,194,936 | -5.3% | 0.18% | $22,524,544 |
| Engineers Gate Manager LP | 0.77% | 1,049,218 | +36% | 0.23% | $19,777,759 |
| COOPER CREEK PARTNERS MANAGEMENT LLC | 0.73% | 999,209 | -40% | 0.89% | $18,835,000 |
| Kailix Advisors LLC | 0.72% | 978,057 | -11% | 21% | $18,436,374 |
Institutional Holders of CONSTELLIUM SE - Ordinary Shares (CSTM) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 35,199,576 | $866,914,377 | +$114,692,985 | $24.58 | 149 |
| 2025 Q4 | 122,557,522 | $2,310,215,599 | -$97,652,833 | $18.85 | 249 |
| 2025 Q3 | 127,194,470 | $1,892,670,941 | -$60,109,911 | $14.88 | 233 |
| 2025 Q2 | 131,403,730 | $1,747,763,305 | +$26,240,393 | $13.30 | 220 |
| 2025 Q1 | 131,724,011 | $1,329,603,393 | -$41,371,431 | $10.09 | 219 |
| 2024 Q4 | 135,085,234 | $1,387,263,339 | -$40,978,802 | $10.27 | 216 |
| 2024 Q3 | 135,141,064 | $2,197,521,719 | -$33,275,385 | $16.26 | 219 |
| 2024 Q2 | 135,236,292 | $2,551,728,494 | -$3,748,186 | $18.85 | 222 |
| 2024 Q1 | 135,670,703 | $2,999,674,203 | +$156,844,496 | $22.11 | 203 |
| 2023 Q4 | 131,982,424 | $2,630,394,795 | -$32,542,733 | $19.96 | 191 |
| 2023 Q3 | 133,798,731 | $2,427,376,081 | -$19,013,869 | $18.20 | 190 |
| 2023 Q2 | 134,840,201 | $2,319,248,185 | +$28,822,207 | $17.20 | 184 |
| 2023 Q1 | 133,335,658 | $2,037,448,361 | +$15,551,402 | $15.28 | 180 |
| 2022 Q4 | 132,820,125 | $1,571,467,832 | +$9,278,194 | $11.83 | 183 |
| 2022 Q3 | 131,333,210 | $1,332,142,046 | -$146,517,561 | $10.14 | 173 |
| 2022 Q2 | 131,191,833 | $1,733,465,535 | +$15,771,631 | $13.21 | 182 |
| 2022 Q1 | 129,862,771 | $2,337,406,926 | +$80,052,438 | $18.00 | 180 |
| 2021 Q4 | 125,444,986 | $2,245,680,516 | +$37,513,774 | $17.91 | 158 |
| 2021 Q3 | 125,499,667 | $2,357,524,460 | +$260,021,262 | $18.78 | 159 |
| 2021 Q2 | 111,678,826 | $2,115,575,656 | +$140,903,088 | $18.95 | 145 |
| 2021 Q1 | 104,659,629 | $1,537,958,550 | -$232,773 | $14.70 | 130 |
| 2020 Q4 | 104,469,239 | $1,460,530,885 | +$75,165,645 | $13.99 | 133 |
| 2020 Q3 | 99,355,679 | $780,524,275 | +$14,546,095 | $7.85 | 123 |
| 2020 Q2 | 97,654,422 | $750,539,320 | -$27,607,702 | $7.68 | 127 |
| 2020 Q1 | 103,607,598 | $540,420,578 | -$109,901,313 | $5.21 | 132 |
| 2019 Q4 | 106,135,362 | $1,423,113,091 | +$1,412,138,398 | $13.40 | 153 |
| 2019 Q3 | 80 | $2,000 | $25.00 | 1 | |
| 2019 Q2 | 80 | $2,000 | $25.00 | 1 | |
| 2019 Q1 | 80 | $2,000 | $25.00 | 1 |