Constellium SE
US ˙ NYSE ˙ FR0013467479

SecurityCSTM / Constellium SE
InstitutionMorgan Stanley
Latest Disclosed Ownership3,196,054 shares
Latest Disclosed Value $ 78,559,021
Morgan Stanley reports 14.27% decrease in ownership of CSTM / Constellium SE

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 3,196,054 shares of Constellium SE (US:CSTM) valued at $78,559,007 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 3,728,118 shares of Constellium SE. This represents a change in shares of -14.27% during the quarter. The current value of the position is $115,537,352 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-15 2026-03-31 13F CONSTELLIUM SE CL A SHS F21107101 3,196,054 -532,064 -14.27 78,559 11.79 0.0047
2026-05-27 2025-12-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 3,728,118 1,216,516 48.44 70,275 88.04 0.0042
2026-02-13 2025-12-31 13F CONSTELLIUM SE CL A SHS F21107101 3,728,118 1,216,516 70,275 0.0042
2026-05-27 2025-09-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 2,511,602 910,385 56.86 37,373 75.49 0.0023
2025-11-14 2025-09-30 13F CONSTELLIUM SE CL A SHS F21107101 2,511,602 910,385 37,373 0.0023
2025-08-15 2025-06-30 13F CONSTELLIUM SE CL A SHS F21107101 1,601,217 347,149 27.68 21,296 68.31 0.0014
2025-05-15 2025-03-31 13F CONSTELLIUM SE CL A SHS F21107101 1,254,068 -902,581 -41.85 12,654 -42.87 0.0009
2025-05-15 2024-12-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 2,156,649 -86,005 -3.83 22,149 -39.26 0.0016
2025-02-14 2024-12-31 13F CONSTELLIUM SE CL A SHS F21107101 2,156,649 -86,005 22,149 0.0016
2025-05-14 2024-09-30 13F/A-2 CONSTELLIUM SE CL A SHS F21107101 2,242,654 23,545 1.06 36,466 -12.83 0.0026
2025-02-14 2024-09-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 2,242,654 23,545 36,466 0.0026
2024-11-14 2024-09-30 13F CONSTELLIUM SE CL A SHS F21107101 2,242,654 23,545 36,466 0.0026
2025-05-14 2024-06-30 13F/A-2 CONSTELLIUM SE CL A SHS F21107101 2,219,109 721,980 48.22 41,830 26.37 0.0032
2024-10-17 2024-06-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 2,219,109 721,980 41,830 0.0032
2024-08-14 2024-06-30 13F CONSTELLIUM SE CL A SHS F21107101 2,219,109 721,980 41,830 0.0032
2024-10-17 2024-03-31 13F/A-2 CONSTELLIUM SE CL A SHS F21107101 1,497,129 518,151 52.93 33,102 69.40 0.0027
2024-08-16 2024-03-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 1,497,129 518,151 33,102 0.0003
2024-05-15 2024-03-31 13F CONSTELLIUM SE CL A SHS F21107101 1,497,129 518,151 33,102 0.0027
2024-08-16 2023-12-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 978,978 110,052 12.67 19,540 23.56 0.0017
2024-02-13 2023-12-31 13F CONSTELLIUM SE CL A SHS F21107101 978,978 110,052 19,540 0.0017
2023-11-15 2023-09-30 13F CONSTELLIUM SE CL A SHS F21107101 868,926 -115,432 -11.73 15,814 -6.59 0.0016
2023-08-14 2023-06-30 13F CONSTELLIUM SE CL A SHS F21107101 984,358 -16,968 -1.69 16,931 10.65 0.0017
2023-05-15 2023-03-31 13F CONSTELLIUM SE CL A SHS F21107101 1,001,326 55,270 5.84 15,300 36.72 0.0016
2023-02-14 2022-12-31 13F CONSTELLIUM SE CL A SHS F21107101 946,056 248,051 35.54 11,192 58.13 0.0013
2022-11-14 2022-09-30 13F CONSTELLIUM SE CL A SHS F21107101 698,005 -124,993 -15.19 7,077 -34.91 0.0010
2022-10-27 2022-06-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 822,998 -27,413 -3.22 10,872 -28.98 0.0014
2022-08-15 2022-06-30 13F CONSTELLIUM SE CL A SHS F21107101 822,998 -27,413 10,872 0.0003
2022-10-27 2022-03-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 850,411 240,309 39.39 15,308 40.09 0.0021
2022-05-13 2022-03-31 13F CONSTELLIUM SE CL A SHS F21107101 850,411 240,309 15,308 0.0021
2022-02-14 2021-12-31 13F CONSTELLIUM SE CL A SHS F21107101 610,102 -280,406 -31.49 10,927 -34.66 0.0013
2021-11-15 2021-09-30 13F CONSTELLIUM SE CL A SHS F21107101 890,508 -403,873 -31.20 16,724 -31.82 0.0023
2021-08-23 2021-06-30 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 1,294,381 -713,158 -35.52 24,529 -16.88 0.0032
2021-08-16 2021-06-30 13F CONSTELLIUM SE CL A SHS F21107101 1,294,381 -713,158 24,529 0.0007
2021-05-17 2021-03-31 13F CONSTELLIUM SE CL A SHS F21107101 2,007,539 -209,120 -9.43 29,511 -4.83 0.0043
2021-02-16 2020-12-31 13F CONSTELLIUM SE CL A SHS F21107101 2,216,659 -689,487 -23.73 31,010 35.93 0.0048
2020-11-13 2020-09-30 13F CONSTELLIUM SE CL A SHS F21107101 2,906,146 -296,140 -9.25 22,813 -7.24 0.0044
2020-08-14 2020-06-30 13F CONSTELLIUM SE CL A SHS F21107101 3,202,286 -1,740,537 -35.21 24,594 -4.50 0.0054
2020-05-26 2020-03-31 13F/A-1 CONSTELLIUM SE CL A SHS F21107101 4,942,823 -1,951,449 -28.31 25,752 -72.12 0.0070
2020-05-15 2020-03-31 13F CONSTELLIUM SE CL A SHS F21107101 4,942,823 -1,951,449 25,752 1,978.2904
2020-02-14 2019-12-31 13F CONSTELLIUM SE CL A SHS F21107101 6,894,272 3,949,621 134.13 92,383 146.84 0.0215
2019-11-14 2019-09-30 13F CONSTELLIUM SE CL A N22035104 2,944,651 939,793 46.88 37,427 85.94 0.0099
2019-08-14 2019-06-30 13F CONSTELLIUM CL A N22035104 2,004,858 104,162 5.48 20,129 32.72 0.0054
2019-05-15 2019-03-31 13F CONSTELLIUM CL A N22035104 1,900,696 206,035 12.16 15,167 28.03 0.0043
2019-02-14 2018-12-31 13F CONSTELLIUM CL A N22035104 1,694,661 -1,625,166 -48.95 11,846 -71.11 0.0035
2019-04-23 2018-09-30 13F/A-2 CONSTELLIUM CL A N22035104 3,319,827 -122,142 -3.55 40,999 15.65 0.0103
2018-11-20 2018-09-30 13F/A-1 CONSTELLIUM CL A N22035104 3,319,827 0 40,999 0.0103
2018-11-14 2018-09-30 13F CONSTELLIUM CL A N22035104 3,319,827 -122,142 40,999
2019-04-23 2018-06-30 13F/A-1 CONSTELLIUM CL A N22035104 3,441,969 -100,088 -2.83 35,451 -7.76 0.0096
2018-08-14 2018-06-30 13F CONSTELLIUM CL A N22035104 3,441,969 -100,088 35,451
2019-04-23 2018-03-31 13F/A-1 CONSTELLIUM CL A N22035104 3,542,057 10,073 0.29 38,432 -2.41 0.0107
2018-05-14 2018-03-31 13F CONSTELLIUM CL A N22035104 3,542,057 10,073 38,432
2019-04-23 2017-12-31 13F/A-1 CONSTELLIUM CL A N22035104 3,531,984 366,978 11.59 39,381 21.39 0.0108
2018-02-14 2017-12-31 13F CONSTELLIUM CL A N22035104 3,531,984 366,978 39,381
2017-11-14 2017-09-30 13F CONSTELLIUM CL A N22035104 3,165,006 977,922 44.71 32,442 114.98 0.0097
2017-08-11 2017-06-30 13F CONSTELLIUM CL A N22035104 2,187,084 373,949 20.62 15,091 28.05 0.0046
2017-05-22 2017-03-31 13F/A-1 CONSTELLIUM CL A N22035104 1,813,135 -639,462 -26.07 11,785 -18.55 0.0036
2017-05-12 2017-03-31 13F CONSTELLIUM CL A N22035104 1,813,135 11,785
2017-02-22 2016-12-31 13F/A-1 CONSTELLIUM CL A N22035104 2,452,597 419,636 20.64 14,469 -1.15 0.0047
2017-02-13 2016-12-31 13F CONSTELLIUM CL A N22035104 2,452,597 14,469
2016-11-10 2016-09-30 13F CONSTELLIUM CL A N22035104 2,032,961 233,047 12.95 14,637 73.36 0.0050
2016-08-12 2016-06-30 13F CONSTELLIUM CL A N22035104 1,799,914 1,172,071 186.68 8,443 159.07 0.0030
2016-05-12 2016-03-31 13F CONSTELLIUM CL A N22035104 627,843 -422,677 -40.24 3,259 -59.71 0.0013
2016-02-09 2015-12-31 13F CONSTELLIUM CL A N22035104 1,050,520 538,252 105.07 8,088 160.57 0.0029
2016-02-08 2015-09-30 13F/A-1 CONSTELLIUM CL A N22035104 512,268 -212,207 -29.29 3,104 -63.78 0.0011
2015-11-09 2015-09-30 13F CONSTELLIUM CL A N22035104 512,268 3,104
2015-08-12 2015-06-30 13F CONSTELLIUM CL A N22035104 724,475 -342,215 -32.08 8,571 -60.46 0.0030
2015-05-14 2015-03-31 13F CONSTELLIUM CL A N22035104 1,066,690 17,750 1.69 21,675 25.77 0.0080
2015-02-13 2014-12-31 13F CONSTELLIUM CL A N22035104 1,048,940 -262,549 -20.02 17,234 -46.60 0.0063
2014-12-16 2014-09-30 13F/A-1 CONSTELLIUM CL A N22035104 1,311,489 53,703 4.27 32,276 -19.96 0.0124
2014-11-14 2014-09-30 13F CONSTELLIUM CL A N22035104 1,311,489 32,276
2014-08-12 2014-06-30 13F CONSTELLIUM CL A N22035104 1,257,786 194,537 18.30 40,325 29.22 0.0690
2014-05-13 2014-03-31 13F CONSTELLIUM CL A N22035104 1,063,249 744,125 233.18 31,207 320.30 0.0131
2014-02-13 2013-12-31 13F CONSTELLIUM HOLDCO B V CL A N22035104 319,124 78,929 32.86 7,425 59.33 0.0032
2013-11-13 2013-09-30 13F CONSTELLIUM HOLDCO BV COM N22035104 240,195 38,941 19.35 4,660 43.43 0.0022
2013-08-08 2013-06-30 13F CONSTELLIUM HOLDCO BV COM N22035104 201,254 201,254 3,249 0.0016
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.