← Back to companies
Steel Dynamics
STLDBasic MaterialsNMS$25.3B
STLD SEC filings last scanned 4 Oct 2026, 19:09 UTC
CEO Timeline
Mark D. MillettCurrentRetiring Jan 2027
Jan 2012 — Present(14y 9mo)
Mark D. Millett was appointed President and Chief Executive Officer of Steel Dynamics, Inc., effective January 1, 2012, succeeding retiring co-founder Keith E. Busse.
planned retirement as CEO
4 source filings — click to expand
Theresa E. WaglerStarts Jan 2027
Scheduled to begin Jan 2027
Theresa E. Wagler, the company's CFO, will become President and CEO of Steel Dynamics effective January 1, 2027, succeeding Mark D. Millett.
1 source filing — click to expand
Keith BusseManually reviewed
Jan 1993 — Dec 2011(18y 11mo)
Keith Busse was appointed President and CEO of the combined Steel Dynamics Inc. and Roanoke Steel entity following the merger, continuing his role as President and CEO of Steel Dynamics Inc.
Keith E. Busse retired as Chief Executive Officer of Steel Dynamics, Inc. at the close of business on December 31, 2011, after serving as the company's only CEO since its inception in 1993.
2 source filings — click to expand