스틸 다이나믹스, Inc.
MX ˙ BMV ˙ US8581191009
SecurityMX:STLD / Steel Dynamics, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership255,791 shares
Latest Disclosed Value $ 46,042,380
Rhumbline Advisers reports 3.75% decrease in ownership of STLD / Steel Dynamics, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 255,791 shares of Steel Dynamics, Inc. (MX:STLD) valued at $46,042,380 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 265,752 shares of Steel Dynamics, Inc.. This represents a change in shares of -3.75% 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)
2026-05-12 2026-03-31 13F STEEL DYNAMICS INC COM COM 858119100 255,791 -9,961 -3.75 46,042 2.25 0.0394
2026-02-13 2025-12-31 13F STEEL DYNAMICS INC COM COM 858119100 265,752 -15,726 -5.59 45,032 14.74 0.0364
2025-11-06 2025-09-30 13F STEEL DYNAMICS INC COM COM 858119100 281,478 -16,583 -5.56 39,246 2.86 0.0315
2025-08-12 2025-06-30 13F STEEL DYNAMICS INC COM COM 858119100 298,061 -915 -0.31 38,155 2.03 0.0327
2025-05-29 2025-03-31 13F/A-1 STEEL DYNAMICS INC COM COM 858119100 298,976 36,996 14.12 37,396 25.14 0.0350
2025-04-08 2025-03-31 13F STEEL DYNAMICS INC COM COM 858119100 298,976 36,996 37,396 0.0350
2025-05-29 2024-12-31 13F/A-1 STEEL DYNAMICS INC COM COM 858119100 261,980 -4,623 -1.73 29,884 -11.10 0.0267
2025-01-30 2024-12-31 13F STEEL DYNAMICS INC COM COM 858119100 261,980 -4,623 29,884 0.0267
2024-11-12 2024-09-30 13F STEEL DYNAMICS INC COM COM 858119100 266,603 -12,375 -4.44 33,613 -6.96 0.0303
2024-08-01 2024-06-30 13F STEEL DYNAMICS INC COM COM 858119100 278,978 -42,279 -13.16 36,128 -24.13 0.0340
2024-05-09 2024-03-31 13F STEEL DYNAMICS INC COM COM 858119100 321,257 25,849 8.75 47,620 36.49 0.0457
2024-02-08 2023-12-31 13F STEEL DYNAMICS INC COM COM 858119100 295,408 -7,640 -2.52 34,888 7.37 0.0366
2023-11-09 2023-09-30 13F STEEL DYNAMICS INC COM COM 858119100 303,048 -7,491 -2.41 32,493 -3.95 0.0377
2023-08-08 2023-06-30 13F STEEL DYNAMICS INC COM COM 858119100 310,539 -6,761 -2.13 33,827 96,548.57 0.0379
2023-05-11 2023-03-31 13F STEEL DYNAMICS INC COM COM 858119100 317,300 5,868 1.88 36 -99.88 0.0443
2023-02-14 2022-12-31 13F STEEL DYNAMICS INC COM COM 858119100 311,432 -195,718 -38.59 30,427 -15.44 0.0409
2022-11-10 2022-09-30 13F STEEL DYNAMICS INC COM COM 858119100 507,150 -1,433 -0.28 35,982 6.95 0.0536
2022-08-11 2022-06-30 13F STEEL DYNAMICS INC COM COM 858119100 508,583 20,044 4.10 33,643 -17.46 0.0491
2022-05-12 2022-03-31 13F STEEL DYNAMICS INC COM COM 858119100 488,539 -8,953 -1.80 40,759 32.00 0.0525
2022-02-10 2021-12-31 13F STEEL DYNAMICS INC COM COM 858119100 497,492 -38,211 -7.13 30,879 -1.43 0.0378
2021-11-12 2021-09-30 13F STEEL DYNAMICS INC COM COM 858119100 535,703 -30,610 -5.41 31,328 -7.18 0.0424
2021-08-05 2021-06-30 13F STEEL DYNAMICS INC COM COM 858119100 566,313 -19,555 -3.34 33,752 13.49 0.0443
2021-05-06 2021-03-31 13F STEEL DYNAMICS INC COM COM 858119100 585,868 2,576 0.44 29,739 38.28 0.0404
2021-02-10 2020-12-31 13F STEEL DYNAMICS INC COM COM 858119100 583,292 20,712 3.68 21,506 33.52 0.0297
2020-11-12 2020-09-30 13F STEEL DYNAMICS INC COM COM 858119100 562,580 -29,518 -4.99 16,107 4.27 0.0252
2020-08-13 2020-06-30 13F STEEL DYNAMICS INC COM COM 858119100 592,098 -15,571 -2.56 15,448 12.78 0.0258
2020-05-06 2020-03-31 13F STEEL DYNAMICS INC COM COM 858119100 607,669 47,993 8.58 13,697 -28.10 0.0287
2020-02-05 2019-12-31 13F STEEL DYNAMICS INC COM COM 858119100 559,676 -20,645 -3.56 19,051 10.16 0.0319
2019-10-23 2019-09-30 13F STEEL DYNAMICS INC COM COM 858119100 580,321 -7,841 -1.33 17,294 -2.63 0.0316
2019-08-14 2019-06-30 13F STEEL DYNAMICS INC COM COM 858119100 588,162 -51,542 -8.06 17,762 -21.27 0.0333
2019-05-01 2019-03-31 13F STEEL DYNAMICS INC COM COM 858119100 639,704 -21,495 -3.25 22,562 13.59 0.0437
2019-01-31 2018-12-31 13F STEEL DYNAMICS INC COM COM 858119100 661,199 188,336 39.83 19,862 -7.05 0.0432
2018-11-07 2018-09-30 13F STEEL DYNAMICS INC COM COM 858119100 472,863 -5,205 -1.09 21,369 -2.72 0.0413
2018-08-06 2018-06-30 13F STEEL DYNAMICS INC COM COM 858119100 478,068 33,764 7.60 21,967 11.81 0.0443
2018-05-02 2018-03-31 13F STEEL DYNAMICS INC COM COM 858119100 444,304 -18,678 -4.03 19,647 -1.61 0.0410
2018-02-09 2017-12-31 13F STEEL DYNAMICS INC COM COM 858119100 462,982 -60,011 -11.47 19,968 10.76 0.0406
2017-11-06 2017-09-30 13F STEEL DYNAMICS INC COM COM 858119100 522,993 49,622 10.48 18,028 6.35 0.0392
2017-08-02 2017-06-30 13F STEEL DYNAMICS INC COM COM 858119100 473,371 -15,368 -3.14 16,951 -0.22 0.0387
2017-05-02 2017-03-31 13F STEEL DYNAMICS INC COM COM 858119100 488,739 16,818 3.56 16,989 1.18 0.0397
2017-01-27 2016-12-31 13F STEEL DYNAMICS INC COM COM 858119100 471,921 55,951 13.45 16,791 61.53 0.0426
2016-11-08 2016-09-30 13F STEEL DYNAMICS INC COM COM 858119100 415,970 14,194 3.53 10,395 5.60 0.0286
2016-08-11 2016-06-30 13F STEEL DYNAMICS INC COM COM 858119100 401,776 17,780 4.63 9,844 13.88 0.0292
2016-05-02 2016-03-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 383,996 9,490 2.53 8,644 29.17 0.0268
2016-02-03 2015-12-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 374,506 1,176 0.32 6,692 4.33 0.0215
2015-11-04 2015-09-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 373,330 17,361 4.88 6,414 -13.02 0.0218
2015-08-04 2015-06-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 355,969 30,093 9.23 7,374 12.58 0.0235
2015-05-12 2015-03-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 325,876 25,176 8.37 6,550 10.34 0.0189
2015-02-06 2014-12-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 300,700 8,800 3.01 5,936 -10.06 0.0172
2014-11-12 2014-09-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 291,900 19,630 7.21 6,600 35.05 0.0198
2014-08-06 2014-06-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 272,270 -27,486 -9.17 4,887 -8.36 0.0143
2014-05-06 2014-03-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 299,756 -5,240 -1.72 5,333 -10.52 0.0158
2014-02-03 2013-12-31 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 304,996 -24,062 -7.31 5,960 8.38 0.0176
2013-11-05 2013-09-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 329,058 -3,499 -1.05 5,499 10.91 0.0170
2013-08-07 2013-06-30 13F STEEL DYNAMICS INC COMMON STOC COM 858119100 332,557 332,557 4,958 0.0159
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.