Steel Dynamics Inc.
Last updated September 27, 2026
Organization details
- Legal name
- Steel Dynamics Inc.
- Ownership
- Public
- Status
- Active
- Headquarters country
- United States
- Ticker symbol
- STLD
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0001022671
Board of directors
-
Bradley S. Seaman · DirectorSince 2023
-
Gabriel Shaheen · DirectorSince 2023
-
James C. Marcuccilli · DirectorSince 2023
-
Jennifer L. Hamann · DirectorSince 2023
-
Keith E. Busse · DirectorSince 2023
-
Kenneth W. Cornew · DirectorSince 2023
-
Luis Manuel Sierra · DirectorSince 2023
-
Mark D. Millett · Director · Chairman and CEOSince 2023
-
Richard P. Teets Jr. · DirectorSince 2023
-
Sheree L. Bargabos · DirectorSince 2023
-
Steven Alan Sonnenberg · DirectorSince 2023
-
Traci M. Dolan · DirectorSince 2023
Chief executives
Mark D. Millett
· Chairman and CEO
Dates unknown
Board connections
2 of this board's directors also sit on 3 other boards.
- via Bradley S. Seaman
- via Steven Alan Sonnenberg
- via Steven Alan Sonnenberg
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $0
- 0 purchases by 0 insiders
- Sold, last 12 months
- $8,912,739
- 14 sales by 5 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 13, 2026 | Jennifer L. Hamann Director | Grant or award | +72 | — | — |
| Jul 28, 2026 | Mark D. Millett Director, Officer (Chairman and CEO) | Gift | −300 | — | — |
| Jul 10, 2026 | Sheree L. Bargabos Director | Grant or award | +43 | — | — |
| Jul 10, 2026 | Kenneth W. Cornew Director | Grant or award | +2 | — | — |
| Jul 10, 2026 | Traci M. Dolan Director | Grant or award | +102 | — | — |
| Jul 10, 2026 | Jennifer L. Hamann Director | Grant or award | +18 | — | — |
| Jul 10, 2026 | Bradley S. Seaman Director | Grant or award | +109 | — | — |
| Jul 10, 2026 | Luis Manuel Sierra Director | Grant or award | +7 | — | — |
| Jun 5, 2026 | Anderson James Stanley Officer (Senior Vice President) | Open-market sale | −1,100 | $267.35 | $294,085 |
| Jun 5, 2026 | Anderson James Stanley Officer (Senior Vice President) | Open-market sale | −4,177 | $268.42 | $1,121,190 |
| Jun 5, 2026 | Anderson James Stanley Officer (Senior Vice President) | Open-market sale | −4,401 | $269.22 | $1,184,837 |
| Jun 5, 2026 | Anderson James Stanley Officer (Senior Vice President) | Open-market sale | −322 | $269.93 | $86,917 |
| Jun 1, 2026 | Bradley S. Seaman Director | Grant or award | +712 | — | — |
| Jun 1, 2026 | Jennifer L. Hamann Director | Grant or award | +712 | — | — |
| Jun 1, 2026 | Traci M. Dolan Director | Grant or award | +712 | — | — |
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