Steel Dynamics, Inc.
US ˙ NasdaqGS ˙ US8581191009

SecuritySTLD / Steel Dynamics, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership70,371 shares
Latest Disclosed Value $ 12,666,780
Walleye Capital LLC ownership in STLD / Steel Dynamics, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 70,371 shares of Steel Dynamics, Inc. (US:STLD) valued at $12,666,780 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 197 shares of Steel Dynamics, Inc.. This represents a change in shares of 35,621.32% during the quarter. The current value of the position is $18,894,614 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (STLD) in the form of stock options. The firm currently holds call options representing 26,500 of underlying shares valued at $4,770,000 USD and put options representing 26,100 of underlying shares valued at $4,698,000 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

STLD / Steel Dynamics, Inc. Historical Put/Call Ratio
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/A-1 STEEL DYNAMICS COM 858119100 70,371 70,174 35,621.32 12,667 38,281.82 0.0527
2026-05-08 2026-03-31 13F STEEL DYNAMICS COM 858119100 70,371 70,174 12,667 0.0527
2026-02-13 2025-12-31 13F STEEL DYNAMICS COM 858119100 197 -26,672 -99.27 33 -99.12 0.0001
2025-11-14 2025-09-30 13F STEEL DYNAMICS COM 858119100 26,869 22,532 519.53 3,746 574.95 0.0141
2025-08-13 2025-06-30 13F STEEL DYNAMICS COM 858119100 4,337 1,357 45.54 555 49.19 0.0022
2025-05-14 2025-03-31 13F STEEL DYNAMICS COM 858119100 2,980 -194,028 -98.49 373 -98.34 0.0017
2025-02-13 2024-12-31 13F STEEL DYNAMICS COM 858119100 197,008 125,609 175.93 22,473 149.66 0.0549
2024-11-14 2024-09-30 13F STEEL DYNAMICS COM 858119100 71,399 47,641 200.53 9,002 192.62 0.0187
2024-08-14 2024-06-30 13F STEEL DYNAMICS COM 858119100 23,758 17,080 255.77 3,077 211.02 0.0055
2024-05-15 2024-03-31 13F STEEL DYNAMICS COM 858119100 6,678 -20,930 -75.81 990 -69.66 0.0018
2024-02-14 2023-12-31 13F STEEL DYNAMICS COM 858119100 27,608 4,490 19.42 3,261 31.56 0.0069
2023-11-21 2023-09-30 13F/A-1 STEEL DYNAMICS COM 858119100 23,118 -17,218 -42.69 2,479 -43.59 0.0063
2023-11-14 2023-09-30 13F STEEL DYNAMICS COM 858119100 23,118 -17,218 2,479 0.0064
2023-08-14 2023-06-30 13F STEEL DYNAMICS COM 858119100 40,336 40,336 4,394 0.0159
2023-02-14 2022-12-31 13F STEEL DYNAMICS COM 858119100 0 -30,095 -100.00 0 -100.00
2022-11-14 2022-09-30 13F STEEL DYNAMICS COM 858119100 30,095 30,095 2,135 0.0407
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A STEEL DYNAMICS COM Call 26,500 25.00 4,770 32.80 n/a n/a n/a
2026-05-08 2026-03-31 13F STEEL DYNAMICS COM Call 26,500 4,770 n/a n/a n/a
2026-02-13 2025-12-31 13F STEEL DYNAMICS COM Call 21,200 84.35 3,592 124.08 n/a n/a n/a
2025-11-14 2025-09-30 13F STEEL DYNAMICS COM Call 11,500 -3.36 1,603 5.25 n/a n/a n/a
2025-08-13 2025-06-30 13F STEEL DYNAMICS COM Call 11,900 -47.58 1,523 -46.35 n/a n/a n/a
2025-05-14 2025-03-31 13F STEEL DYNAMICS COM Call 22,700 122.55 2,839 144.11 n/a n/a n/a
2025-02-13 2024-12-31 13F STEEL DYNAMICS COM Call 10,200 -55.84 1,164 -60.06 n/a n/a n/a
2024-11-14 2024-09-30 13F STEEL DYNAMICS COM Call 23,100 143.16 2,912 136.75 n/a n/a n/a
2024-08-14 2024-06-30 13F STEEL DYNAMICS COM Call 9,500 -71.73 1,230 -75.30 n/a n/a n/a
2024-05-15 2024-03-31 13F STEEL DYNAMICS COM Call 33,600 94.22 4,981 143.76 n/a n/a n/a
2024-02-14 2023-12-31 13F STEEL DYNAMICS COM Call 17,300 -17.62 2,043 -9.24 n/a n/a n/a
2023-11-21 2023-09-30 13F/A STEEL DYNAMICS COM Call 21,000 -5.83 2,252 -7.33 n/a n/a n/a
2023-11-14 2023-09-30 13F STEEL DYNAMICS COM Call 21,000 2,252 n/a n/a n/a
2023-08-14 2023-06-30 13F STEEL DYNAMICS COM Call 22,300 668.97 2,429 642.81 n/a n/a n/a
2023-05-15 2023-03-31 13F STEEL DYNAMICS COM Call 2,900 328 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F/A STEEL DYNAMICS COM Put 26,100 13.97 4,698 21.08 n/a n/a n/a
2026-05-08 2026-03-31 13F STEEL DYNAMICS COM Put 26,100 4,698 n/a n/a n/a
2026-02-13 2025-12-31 13F STEEL DYNAMICS COM Put 22,900 51.66 3,880 84.32 n/a n/a n/a
2025-11-14 2025-09-30 13F STEEL DYNAMICS COM Put 15,100 -51.76 2,105 -47.45 n/a n/a n/a
2025-08-13 2025-06-30 13F STEEL DYNAMICS COM Put 31,300 148.41 4,007 154.19 n/a n/a n/a
2025-05-14 2025-03-31 13F STEEL DYNAMICS COM Put 12,600 -49.80 1,576 -44.95 n/a n/a n/a
2025-02-13 2024-12-31 13F STEEL DYNAMICS COM Put 25,100 -14.04 2,863 -22.22 n/a n/a n/a
2024-11-14 2024-09-30 13F STEEL DYNAMICS COM Put 29,200 -39.04 3,682 -40.66 n/a n/a n/a
2024-08-14 2024-06-30 13F STEEL DYNAMICS COM Put 47,900 -25.74 6,203 -35.12 n/a n/a n/a
2024-05-15 2024-03-31 13F STEEL DYNAMICS COM Put 64,500 -7.46 9,561 16.15 n/a n/a n/a
2024-02-14 2023-12-31 13F STEEL DYNAMICS COM Put 69,700 33.52 8,232 47.09 n/a n/a n/a
2023-11-21 2023-09-30 13F/A STEEL DYNAMICS COM Put 52,200 770.00 5,597 756.97 n/a n/a n/a
2023-11-14 2023-09-30 13F STEEL DYNAMICS COM Put 52,200 5,597 n/a n/a n/a
2023-08-14 2023-06-30 13F STEEL DYNAMICS COM Put 6,000 200.00 654 188.94 n/a n/a n/a
2023-05-15 2023-03-31 13F STEEL DYNAMICS COM Put 2,000 226 n/a n/a n/a
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.