Steel Dynamics Inc
Ownership
Ownership Structure
Who owns Steel Dynamics Inc (STLD)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 93.2% of the shares are freely tradable; institutional investors hold 89.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.65 | 12,396,499 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.21 | 8,902,216 | -0.8 | 06/30/2026 |
| FMR Inc | 5.39 | 7,720,913 | +75.0 | 06/30/2026 |
| State Street Corp | 5.15 | 7,376,476 | -1.8 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.71 | 6,755,104 | -0.8 | 06/30/2026 |
| Geode Capital Management, LLC | 2.64 | 3,778,189 | -1.5 | 06/30/2026 |
| Capital Research Global Investors | 2.54 | 3,639,878 | +0.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.01 | 4,319,867 | -0.8 | 09/30/2026 |
| Vanguard 500 Index Investor | 2.47 | 3,538,088 | -1.7 | 09/30/2026 |
| American Funds Growth Fd of Amer A | 2.46 | 3,527,611 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Millett Mark D | Chairman and CEO | 3,016,401 | 756,513,371 $ | Jul 28, 2026 | direct |
| Dolan Traci M | Director | 59,067 | 14,814,004 $ | Oct 9, 2026 | direct |
| Seaman Bradley S | Director | 51,705 | 12,967,614 $ | Oct 9, 2026 | direct |
| Cornew Kenneth W. | Director | 32,015 | 8,029,362 $ | Oct 9, 2026 | direct |
| Bargabos Sheree L | Director | 27,145 | 6,807,966 $ | Oct 9, 2026 | direct |
| Sierra Luis Manuel | Director | 11,530 | 2,891,724 $ | Oct 9, 2026 | direct |
| Hamann Jennifer L | Director | 5,394 | 1,352,815 $ | Oct 9, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 9, 2026 | Sierra Luis Manuel | Director | Other | 7 | 0.00 | – |
| Oct 9, 2026 | Seaman Bradley S | Director | Other | 105 | 0.00 | – |
| Oct 9, 2026 | Hamann Jennifer L | Director | Other | 18 | 0.00 | – |
| Oct 9, 2026 | Dolan Traci M | Director | Other | 97 | 0.00 | – |
| Oct 9, 2026 | Cornew Kenneth W. | Director | Other | 2 | 0.00 | – |
| Oct 9, 2026 | Bargabos Sheree L | Director | Other | 40 | 0.00 | – |
| Aug 13, 2026 | Hamann Jennifer L | Director | Other | 72 | 0.00 | – |
| Jul 28, 2026 | Millett Mark D | Chairman and CEO | Other | 300 | 0.00 | – |
| Jul 10, 2026 | Sierra Luis Manuel | Director | Other | 7 | 0.00 | – |
| Jul 10, 2026 | Seaman Bradley S | Director | Other | 109 | 0.00 | – |
| Jul 10, 2026 | Hamann Jennifer L | Director | Other | 18 | 0.00 | – |
| Jul 10, 2026 | Dolan Traci M | Director | Other | 102 | 0.00 | – |
| Jul 10, 2026 | Cornew Kenneth W. | Director | Other | 2 | 0.00 | – |
| Jul 10, 2026 | Bargabos Sheree L | Director | Other | 43 | 0.00 | – |
| Apr 23, 2026 | Kenneth W Cornew | Director | Sell | 5,000 | 224.87 | 1,124,350 |
| Apr 23, 2026 | Miguel Alvarez | SVP | Sell | 4,825 | 225.58 | 1,088,424 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.