ArcelorMittal S.A. - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US03938L2034

SecurityMT / ArcelorMittal S.A. - Depositary Receipt (Common Stock)
InstitutionRobotti Robert
Latest Disclosed Ownership236,570 shares
Latest Disclosed Value $ 12,296,909
Robotti Robert reports 30.16% decrease in ownership of MT / ArcelorMittal S.A. - Depositary Receipt (Common Stock)

On May 13, 2026 - Robotti Robert filed a 13F-HR form disclosing ownership of 236,570 shares of ArcelorMittal S.A. - Depositary Receipt (Common Stock) (US:MT) valued at $12,296,909 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 18, 2026 disclosing 338,710 shares of ArcelorMittal S.A. - Depositary Receipt (Common Stock). This represents a change in shares of -30.16% during the quarter. The current value of the position is $16,888,732 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)
2026-05-13 2026-03-31 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 236,570 -102,140 -30.16 12,297 -20.34 1.9177
2026-02-18 2025-12-31 13F/A-1 ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 338,710 -190 -0.06 15,435 25.99 2.7720
2026-02-12 2025-12-31 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 338,710 -190 15,435 2.1724
2025-11-12 2025-09-30 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 338,900 -1,685 -0.49 12,251 13.91 2.1254
2025-08-13 2025-06-30 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 340,585 -4,430 -1.28 10,756 8.06 1.8075
2025-05-13 2025-03-31 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 345,015 -23,170 -6.29 9,954 16.87 1.9945
2025-02-12 2024-12-31 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 368,185 865 0.24 8,516 -11.71 1.4947
2024-11-14 2024-09-30 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 367,320 -355 -0.10 9,646 14.41 1.4682
2024-08-14 2024-06-30 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 367,675 315,650 606.73 8,431 487.87 1.3207
2024-05-15 2024-03-31 13F ARCELORMITTAL SA LUXEMBOURG NY REGISTRY SH 03938L203 52,025 52,025 1,435 0.1947
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.