Steel Dynamics, Inc.
GB ˙ LSE ˙ US8581191009
SecurityGB:0ADX / Steel Dynamics, Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership58,915 shares
Latest Disclosed Value $ 10,604,700
Asset Management One Co., Ltd. reports 2.21% increase in ownership of 0ADX / Steel Dynamics, Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 58,915 shares of Steel Dynamics, Inc. (GB:0ADX) valued at $10,604,700 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 57,641 shares of Steel Dynamics, Inc.. This represents a change in shares of 2.21% during the quarter.

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)
2026-05-08 2026-03-31 13F STEEL DYNAMICS COM 858119100 58,915 1,274 2.21 10,605 6.46 0.0313
2026-01-27 2025-12-31 13F STEEL DYNAMICS COM 858119100 57,641 393 0.69 9,962 24.79 0.0277
2025-10-22 2025-09-30 13F STEEL DYNAMICS COM 858119100 57,248 -1,775 -3.01 7,982 5.65 0.0231
2025-07-31 2025-06-30 13F STEEL DYNAMICS COM 858119100 59,023 822 1.41 7,556 3.79 0.0237
2025-04-23 2025-03-31 13F STEEL DYNAMICS COM 858119100 58,201 1,391 2.45 7,280 10.69 0.0252
2025-01-30 2024-12-31 13F STEEL DYNAMICS COM 858119100 56,810 -8,706 -13.29 6,577 -20.39 0.0226
2024-10-30 2024-09-30 13F STEEL DYNAMICS COM 858119100 65,516 1,727 2.71 8,260 0.00 0.0294
2024-07-18 2024-06-30 13F STEEL DYNAMICS COM 858119100 63,789 3,993 6.68 8,261 -6.80 0.0316
2024-05-02 2024-03-31 13F STEEL DYNAMICS COM 858119100 59,796 -9,886 -14.19 8,864 6.82 0.0342
2024-01-24 2023-12-31 13F STEEL DYNAMICS COM 858119100 69,682 -4,288 -5.80 8,298 4.61 0.0334
2023-10-19 2023-09-30 13F STEEL DYNAMICS COM 858119100 73,970 8,186 12.44 7,931 10.69 0.0353
2023-07-31 2023-06-30 13F STEEL DYNAMICS COM 858119100 65,784 -14,242 -17.80 7,166 -20.80 0.0303
2023-04-25 2023-03-31 13F STEEL DYNAMICS COM 858119100 80,026 -803 -0.99 9,048 13.77 0.0410
2023-02-06 2022-12-31 13F STEEL DYNAMICS COM 858119100 80,829 -2,797 -3.34 7,953 34.03 0.0388
2022-11-04 2022-09-30 13F STEEL DYNAMICS COM 858119100 83,626 -5,847 -6.53 5,933 0.25 0.0302
2022-07-29 2022-06-30 13F STEEL DYNAMICS COM 858119100 89,473 7,897 9.68 5,918 -13.03 0.0278
2022-05-13 2022-03-31 13F STEEL DYNAMICS COM 858119100 81,576 -2,510 -2.99 6,805 29.79 0.0266
2022-02-09 2021-12-31 13F STEEL DYNAMICS COM 858119100 84,086 -5,600 -6.24 5,243 -0.06 0.0183
2021-11-02 2021-09-30 13F STEEL DYNAMICS COM 858119100 89,686 -1,225 -1.35 5,246 -3.17 0.0201
2021-08-03 2021-06-30 13F STEEL DYNAMICS COM 858119100 90,911 -3,636 -3.85 5,418 12.90 0.0202
2021-05-14 2021-03-31 13F STEEL DYNAMICS COM 858119100 94,547 -4,776 -4.81 4,799 32.79 0.0191
2021-02-12 2020-12-31 13F STEEL DYNAMICS COM 858119100 99,323 800 0.81 3,614 28.16 0.0149
2020-11-13 2020-09-30 13F STEEL DYNAMICS COM 858119100 98,523 -16,343 -14.23 2,820 -5.87 0.0130
2020-08-14 2020-06-30 13F STEEL DYNAMICS COM 858119100 114,866 8,871 8.37 2,996 25.41 0.0147
2020-05-14 2020-03-31 13F STEEL DYNAMICS COM 858119100 105,995 -2,377 -2.19 2,389 -35.24 0.0139
2020-02-14 2019-12-31 13F STEEL DYNAMICS COM 858119100 108,372 -28,284 -20.70 3,689 -9.41 0.0166
2019-11-14 2019-09-30 13F STEEL DYNAMICS COM 858119100 136,656 3,326 2.49 4,072 1.12 0.0196
2019-08-14 2019-06-30 13F STEEL DYNAMICS COM 858119100 133,330 3,921 3.03 4,027 -11.79 0.0198
2019-05-15 2019-03-31 13F STEEL DYNAMICS COM 858119100 129,409 -286,346 -68.87 4,565 -63.42 0.0247
2019-02-13 2018-12-31 13F STEEL DYNAMICS COM 858119100 415,755 3,439 0.83 12,481 -33.09 0.0297
2018-11-14 2018-09-30 13F STEEL DYNAMICS COM 858119100 412,316 -7,585 -1.81 18,654 -3.30 0.0383
2018-08-14 2018-06-30 13F STEEL DYNAMICS COM 858119100 419,901 -16,361 -3.75 19,290 -0.01 0.0422
2018-05-14 2018-03-31 13F STEEL DYNAMICS COM 858119100 436,262 -2,018 -0.46 19,292 1.73 0.0434
2018-02-14 2017-12-31 13F STEEL DYNAMICS COM 858119100 438,280 -31,325 -6.67 18,964 17.08 0.0418
2017-11-14 2017-09-30 13F STEEL DYNAMICS COM 858119100 469,605 39,951 9.30 16,197 5.54 0.0380
2017-08-14 2017-06-30 13F STEEL DYNAMICS COM 858119100 429,654 351,201 447.66 15,347 465.89 0.0392
2017-05-11 2017-03-31 13F STEEL DYNAMICS COM 858119100 78,453 78,453 2,712 0.0071
2016-08-03 2016-06-30 13F STEEL DYNAMICS COM 858119100 0 -91,063 -100.00 0 -100.00
2016-05-05 2016-03-31 13F STEEL DYNAMICS COM 858119100 91,063 0 0.00 2,078 26.17 0.0303
2016-01-28 2015-12-31 13F STEEL DYNAMICS COM 858119100 91,063 91,063 1,647 0.0246
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.