Constellium SE
US ˙ NYSE ˙ FR0013467479

SecurityCSTM / Constellium SE
InstitutionCitigroup Inc
Latest Disclosed Ownership94,857 shares
Latest Disclosed Value $ 2,331,585
Citigroup Inc reports 56.29% increase in ownership of CSTM / Constellium SE

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 94,857 shares of Constellium SE (US:CSTM) valued at $2,331,585 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 60,693 shares of Constellium SE. This represents a change in shares of 56.29% during the quarter. The current value of the position is $3,401,572 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F CONSTELLIUM SE CL A SHS F21107101 94,857 34,164 56.29 2,332 103.76 0.0005
2026-02-13 2025-12-31 13F CONSTELLIUM SE CL A SHS F21107101 60,693 -45,835 -43.03 1,144 -27.82 0.0005
2025-11-10 2025-09-30 13F CONSTELLIUM SE CL A SHS F21107101 106,528 48,069 82.23 1,585 103.99 0.0007
2025-08-11 2025-06-30 13F CONSTELLIUM SE CL A SHS F21107101 58,459 -86,835 -59.77 778 -47.00 0.0004
2025-05-12 2025-03-31 13F CONSTELLIUM SE CL A SHS F21107101 145,294 8,352 6.10 1,466 4.27 0.0007
2025-02-12 2024-12-31 13F CONSTELLIUM SE CL A SHS F21107101 136,942 21,742 18.87 1,406 -24.93 0.0008
2024-11-12 2024-09-30 13F CONSTELLIUM SE CL A SHS F21107101 115,200 44,111 62.05 1,873 39.78 0.0011
2024-08-12 2024-06-30 13F CONSTELLIUM SE CL A SHS F21107101 71,089 45,104 173.58 1,340 133.45 0.0009
2024-05-10 2024-03-31 13F CONSTELLIUM SE CL A SHS F21107101 25,985 3,517 15.65 575 28.13 0.0004
2024-02-09 2023-12-31 13F CONSTELLIUM SE CL A SHS F21107101 22,468 18,197 426.06 448 481.82 0.0003
2023-12-06 2023-09-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 4,271 -37,684 -89.82 78 -89.32 0.0001
2023-11-09 2023-09-30 13F CONSTELLIUM SE CL A SHS F21107101 4,271 -37,684 78 0.0000
2023-08-10 2023-06-30 13F CONSTELLIUM SE CL A SHS F21107101 41,955 37,302 801.68 722 915.49 0.0005
2023-05-11 2023-03-31 13F CONSTELLIUM SE CL A SHS F21107101 4,653 68 1.48 71 31.48 0.0000
2023-02-09 2022-12-31 13F CONSTELLIUM SE CL A SHS F21107101 4,585 -5,172 -53.01 54 -45.45 0.0000
2022-11-10 2022-09-30 13F CONSTELLIUM SE CL A SHS F21107101 9,757 -6,476 -39.89 99 -53.74 0.0001
2022-08-10 2022-06-30 13F CONSTELLIUM SE CL A SHS F21107101 16,233 3,027 22.92 214 -10.08 0.0002
2022-05-12 2022-03-31 13F CONSTELLIUM SE CL A SHS F21107101 13,206 -21,982 -62.47 238 -62.22 0.0001
2022-02-10 2021-12-31 13F CONSTELLIUM SE CL A SHS F21107101 35,188 12,629 55.98 630 48.58 0.0003
2021-11-10 2021-09-30 13F CONSTELLIUM SE CL A SHS F21107101 22,559 16,717 286.15 424 281.98 0.0003
2021-08-10 2021-06-30 13F CONSTELLIUM SE CL A SHS F21107101 5,842 -13,370 -69.59 111 -60.64 0.0001
2021-05-13 2021-03-31 13F CONSTELLIUM SE CL A SHS F21107101 19,212 19,212 282 0.0002
2021-02-11 2020-12-31 13F CONSTELLIUM SE CL A SHS F21107101 0 -2,360 -100.00 0 -100.00
2020-11-12 2020-09-30 13F CONSTELLIUM SE CL A SHS F21107101 2,360 2,360 19 0.0000
2020-05-12 2020-03-31 13F CONSTELLIUM SE CL A SHS F21107101 0 -8,500 -100.00 0 -100.00
2020-02-12 2019-12-31 13F CONSTELLIUM SE CL A SHS F21107101 8,500 -4,908 -36.61 114 -33.33 0.0001
2019-11-08 2019-09-30 13F CONSTELLIUM SE CL A N22035104 13,408 12,566 1,492.40 171 2,037.50 0.0001
2019-08-12 2019-06-30 13F CONSTELLIUM CL A N22035104 842 0 0.00 8 14.29 0.0000
2019-05-13 2019-03-31 13F CONSTELLIUM CL A N22035104 842 -5,700 -87.13 7 -84.78 0.0000
2019-02-12 2018-12-31 13F CONSTELLIUM CL A N22035104 6,542 6,074 1,297.86 46 666.67 0.0000
2018-11-13 2018-09-30 13F CONSTELLIUM CL A N22035104 468 468 6 0.0000
2017-02-10 2016-12-31 13F CONSTELLIUM CL A N22035104 0 -4,117 -100.00 0 -100.00
2016-11-10 2016-09-30 13F CONSTELLIUM CL A N22035104 4,117 -8,990 -68.59 30 -50.82 0.0000
2016-08-12 2016-06-30 13F CONSTELLIUM CL A N22035104 13,107 -806 -5.79 61 -16.44 0.0001
2016-05-13 2016-03-31 13F CONSTELLIUM CL A N22035104 13,913 -12,975 -48.26 73 -64.73 0.0001
2016-02-12 2015-12-31 13F CONSTELLIUM CL A N22035104 26,888 17,628 190.37 207 269.64 0.0002
2015-11-13 2015-09-30 13F CONSTELLIUM CL A N22035104 9,260 -16,149 -63.56 56 -81.40 0.0001
2015-08-13 2015-06-30 13F CONSTELLIUM CL A N22035104 25,409 17,752 231.84 301 92.95 0.0003
2015-05-14 2015-03-31 13F CONSTELLIUM CL A N22035104 7,657 -5,840 -43.27 156 -29.73 0.0002
2015-02-17 2014-12-31 13F CONSTELLIUM CL A N22035104 13,497 9,028 202.01 222 101.82 0.0002
2014-11-14 2014-09-30 13F CONSTELLIUM CL A N22035104 4,469 -162 -3.50 110 -25.68 0.0001
2014-08-14 2014-06-30 13F CONSTELLIUM CL A N22035104 4,631 -10,350 -69.09 148 -66.29 0.0001
2014-05-15 2014-03-31 13F CONSTELLIUM CL A N22035104 14,981 11,735 361.52 439 477.63 0.0004
2014-02-14 2013-12-31 13F CONSTELLIUM HOLDCO B V CL A N22035104 3,246 3,246 76 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.