Latest Period
Q1 2026
Security Snapshot
CONSTELLIUM SE - Ordinary Shares, nominal value EUR0.02 per share (CSTM) Institutional Ownership
CUSIP: F21107101
13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026
Institutions Reporting
309
Shares (Excl. Options)
124,213,833
Price
$24.58
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- Security type / class
- Equity / Ordinary Shares, nominal value EUR0.02 per share
- Symbol
- CSTM on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 124,213,833
- Total 13F value
- $3,039,663,406
- Portfolio coverage rank
- 0.01%
- Share change
- +1,569,516
- Value change
- +$65,257,893
- Number of holders
- 309
- Shares outstanding
- 135,546,823
- SEC-reported price per share
- $34.56
- Insider filing price
- $34.56
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CSTM - CONSTELLIUM SE - Ordinary Shares, nominal value EUR0.02 per share is tracked under CUSIP F21107101.
- 309 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 251 to 309 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $2,310,482,590 to $3,039,663,406.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 309 institutions filings for Q1 2026.
Security key
F21107101
Latest holder period
Q1 2026
13F holders
309
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
CSTM full holder history
CONSTELLIUM SE SEC filings
CONSTELLIUM SE company facts
CONSTELLIUM SE insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP F21107101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
CSTM
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Bpifrance Participations SA | 6.2% | $248,587,451 | 8,403,903 | Bpifrance Participations S.A. | 26 May 2026 | |||
| 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 Mar 2026, 309 institutional investors reported holding 124,213,833 shares of CONSTELLIUM SE - Ordinary Shares, nominal value EUR0.02 per share (CSTM). This represents 92% of the company’s total 135,546,823 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
62%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9.6% | 12,964,203 | -5.6% | 0.01% | $318,660,110 |
| Bpifrance SA | 9.3% | 12,593,903 | 0% | 19% | $309,558,136 |
| FMR LLC | 5.1% | 6,961,768 | -34% | 0.01% | $171,120,251 |
| T. Rowe Price Investment Management, Inc. | 2.9% | 3,960,819 | -8.6% | 0.07% | $97,357,000 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.9% | 3,927,097 | 0% | 0.01% | $96,528,044 |
| MILLENNIUM MANAGEMENT LLC | 2.6% | 3,470,091 | -45% | 0.06% | $85,294,837 |
| D. E. Shaw & Co., Inc. | 2.4% | 3,234,576 | +5.9% | 0.06% | $79,505,879 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.4% | 3,228,027 | +621% | 0.04% | $79,344,904 |
| MORGAN STANLEY | 2.4% | 3,196,054 | -14% | 0% | $78,559,021 |
| Nuveen, LLC | 2.1% | 2,827,731 | -0.47% | 0.02% | $69,505,629 |
| STATE STREET CORP | 2% | 2,763,495 | +3.9% | 0% | $67,926,707 |
| Encompass Capital Advisors LLC | 1.8% | 2,477,278 | -47% | 2.5% | $60,891,493 |
| ALLIANCEBERNSTEIN L.P. | 1.7% | 2,317,008 | +1574% | 0.01% | $43,675,601 |
| AMERICAN CENTURY COMPANIES INC | 1.5% | 2,085,479 | +15% | 0.03% | $51,261,074 |
| AQR CAPITAL MANAGEMENT LLC | 1.5% | 2,074,861 | +17% | 0.02% | $51,000,078 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.5% | 2,056,336 | +894% | 0.08% | $50,544,739 |
| JPMORGAN CHASE & CO | 1.5% | 2,051,930 | -1.8% | 0% | $47,317,505 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.4% | 1,913,433 | -1.6% | 0.08% | $47,032,000 |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | 1.4% | 1,847,000 | +0.27% | 13% | $45,399,260 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2% | 1,668,451 | +2.3% | 0% | $41,006,364 |
| SG Americas Securities, LLC | 1.1% | 1,497,460 | +54% | 0.04% | $36,808,000 |
| WESTWOOD HOLDINGS GROUP INC | 1% | 1,401,416 | 0.25% | $34,446,805 | |
| GOLDMAN SACHS GROUP INC | 1% | 1,371,776 | +0.31% | 0% | $33,718,255 |
| Kinetic Partners Management, LP | 0.97% | 1,312,400 | 1.8% | $32,258,792 | |
| ACADIAN ASSET MANAGEMENT LLC | 0.94% | 1,272,871 | +252% | 0.04% | $31,268,000 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
29
Latest
Q1 2026
Rows shown
1-25 of 29
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 124,213,833 | $3,039,663,406 | +$65,257,893 | $24.58 | 309 |
| 2025 Q4 | 122,571,686 | $2,310,482,590 | -$97,429,009 | $18.85 | 251 |
| 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 |