Steel Dynamics, Inc.
US ˙ NasdaqGS ˙ US8581191009

SecuritySTLD / Steel Dynamics, Inc.
InstitutionSummit Trail Advisors, Llc
Latest Disclosed Ownership9,045 shares
Latest Disclosed Value $ 1,628,100
Summit Trail Advisors, Llc reports 36.78% increase in ownership of STLD / Steel Dynamics, Inc.

On May 12, 2026 - Summit Trail Advisors, Llc filed a 13F-HR form disclosing ownership of 9,045 shares of Steel Dynamics, Inc. (US:STLD) valued at $1,628,100 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,613 shares of Steel Dynamics, Inc.. This represents a change in shares of 36.78% during the quarter. The current value of the position is $2,488,551 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)
2026-05-12 2026-03-31 13F STEEL DYNAMICS COM 858119100 9,045 2,432 36.78 1,628 44.97 0.0233
2026-02-17 2025-12-31 13F STEEL DYNAMICS COM 858119100 6,613 -1,060 -13.81 1,123 4.76 0.0194
2025-11-14 2025-09-30 13F STEEL DYNAMICS COM 858119100 7,673 4,368 132.16 1,073 152.24 0.0148
2025-08-14 2025-06-30 13F STEEL DYNAMICS COM 858119100 3,305 3,305 426 0.0073
2025-01-29 2024-12-31 13F STEEL DYNAMICS COM 858119100 0 -2,368 -100.00 0 -100.00
2024-11-12 2024-09-30 13F STEEL DYNAMICS COM 858119100 2,368 468 24.63 300 21.54 0.0074
2024-08-13 2024-06-30 13F STEEL DYNAMICS INC COM COM 858119100 1,900 -37 -1.91 247 -14.58 0.0065
2024-04-23 2024-03-31 13F STEEL DYNAMICS COM 858119100 1,937 98 5.33 288 32.72 0.0077
2024-02-06 2023-12-31 13F STEEL DYNAMICS COM 858119100 1,839 -80 -4.17 218 5.34 0.0072
2023-10-30 2023-09-30 13F STEEL DYNAMICS COM 858119100 1,919 34 1.80 207 0.00 0.0076
2023-07-25 2023-06-30 13F STEEL DYNAMICS COM 858119100 1,885 1,885 206 0.0078
2018-08-10 2018-06-30 13F STEEL DYNAMICS INC COM EQUITY 858119100 0 -19,459 -100.00 0 -100.00
2018-05-21 2018-03-31 13F STEEL DYNAMICS INC COM EQUITY 858119100 19,459 19,030 4,435.90 19 -5.00 0.0030
2018-02-14 2017-12-31 13F STEEL DYNAMICS INC COM EQUITY 858119100 429 429 20 0.0025
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.