Constellium SE
US ˙ NYSE ˙ FR0013467479

SecurityCSTM / Constellium SE
InstitutionIonic Capital Management LLC
Latest Disclosed Ownership177,722 shares
Latest Disclosed Value $ 4,368,407
Ionic Capital Management LLC reports 18.69% decrease in ownership of CSTM / Constellium SE

On May 15, 2026 - Ionic Capital Management LLC filed a 13F-HR form disclosing ownership of 177,722 shares of Constellium SE (US:CSTM) valued at $4,368,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 218,566 shares of Constellium SE. This represents a change in shares of -18.69% during the quarter. The current value of the position is $6,424,650 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)
2026-05-15 2026-03-31 13F CONSTELLIUM SE CL A SHS F21107101 177,722 -40,844 -18.69 4,368 6.05 0.3192
2026-02-17 2025-12-31 13F CONSTELLIUM SE CL A SHS F21107101 218,566 0 0.00 4,120 26.66 0.5242
2025-11-14 2025-09-30 13F CONSTELLIUM SE CL A SHS F21107101 218,566 0 0.00 3,252 11.91 0.3393
2025-08-14 2025-06-30 13F CONSTELLIUM SE CL A SHS F21107101 218,566 0 0.00 2,907 31.79 0.8320
2025-05-15 2025-03-31 13F CONSTELLIUM SE CL A SHS F21107101 218,566 -62,828 -22.33 2,205 -23.68 0.2890
2025-02-14 2024-12-31 13F CONSTELLIUM SE CL A SHS F21107101 281,394 -250,096 -47.06 2,890 -66.57 0.2958
2024-11-14 2024-09-30 13F CONSTELLIUM SE CL A SHS F21107101 531,490 -35,873 -6.32 8,642 -19.19 1.4966
2024-08-14 2024-06-30 13F CONSTELLIUM SE CL A SHS F21107101 567,363 2,628 0.47 10,695 -14.35 1.8252
2024-05-15 2024-03-31 13F CONSTELLIUM SE CL A SHS F21107101 564,735 -17,500 -3.01 12,486 7.44 4.0236
2024-02-14 2023-12-31 13F CONSTELLIUM SE CL A SHS F21107101 582,235 -190,156 -24.62 11,621 -17.33 2.8508
2023-11-14 2023-09-30 13F CONSTELLIUM SE CL A SHS F21107101 772,391 45,000 6.19 14,058 12.36 3.4240
2023-08-14 2023-06-30 13F CONSTELLIUM SE CL A SHS F21107101 727,391 20,000 2.83 12,511 15.76 3.5704
2023-05-15 2023-03-31 13F CONSTELLIUM SE CL A SHS F21107101 707,391 10,000 1.43 10,809 31.01 3.1519
2023-02-14 2022-12-31 13F CONSTELLIUM SE CL A SHS F21107101 697,391 25,102 3.73 8,250 21.02 1.9533
2022-11-14 2022-09-30 13F CONSTELLIUM SE CL A SHS F21107101 672,289 103,924 18.28 6,817 -9.20 0.9358
2022-08-15 2022-06-30 13F CONSTELLIUM SE CL A SHS F21107101 568,365 50,000 9.65 7,508 -19.54 0.8916
2022-05-16 2022-03-31 13F CONSTELLIUM SE CL A SHS F21107101 518,365 223,155 75.59 9,331 76.49 1.0629
2022-02-14 2021-12-31 13F CONSTELLIUM SE CL A SHS F21107101 295,210 0 0.00 5,287 -4.64 0.6729
2021-11-15 2021-09-30 13F CONSTELLIUM SE CL A SHS F21107101 295,210 -45,000 -13.23 5,544 -14.01 0.7014
2021-08-16 2021-06-30 13F CONSTELLIUM SE CL A SHS F21107101 340,210 0 0.00 6,447 28.91 0.6724
2021-05-17 2021-03-31 13F CONSTELLIUM SE CL A SHS F21107101 340,210 0 0.00 5,001 5.06 0.6368
2021-02-16 2020-12-31 13F CONSTELLIUM SE CL A SHS F21107101 340,210 10,000 3.03 4,760 83.64 0.6648
2020-11-16 2020-09-30 13F CONSTELLIUM SE CL A SHS F21107101 330,210 110,600 50.36 2,592 53.65 0.2168
2020-08-14 2020-06-30 13F CONSTELLIUM SE CL A SHS F21107101 219,610 219,610 1,687 0.3278
2020-05-15 2020-03-31 13F CONSTELLIUM SE CL A SHS F21107101 0 -98,873 -100.00 0 -100.00
2020-02-14 2019-12-31 13F CONSTELLIUM SE CL A SHS F21107101 98,873 16,000 19.31 1,325 25.83 0.6808
2019-11-14 2019-09-30 13F CONSTELLIUM SE CL A N22035104 82,873 21,000 33.94 1,053 69.57 0.1674
2019-08-14 2019-06-30 13F CONSTELLIUM CL A N22035104 61,873 10,538 20.53 621 51.46 0.0645
2019-05-15 2019-03-31 13F CONSTELLIUM CL A N22035104 51,335 0 0.00 410 14.21 0.0639
2019-02-14 2018-12-31 13F CONSTELLIUM CL A N22035104 51,335 51,335 359 0.0363
2018-11-14 2018-09-30 13F CONSTELLIUM CL A N22035104 0 -473,312 -100.00 0 -100.00
2018-08-14 2018-06-30 13F CONSTELLIUM CL A N22035104 473,312 79,336 20.14 4,875 14.04 0.2892
2018-05-15 2018-03-31 13F CONSTELLIUM CL A N22035104 393,976 393,976 4,275 0.2678
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.