Steel Dynamics

STLD

Basic MaterialsNMS$25.3B

STLD SEC filings last scanned 22 Aug 2026, 17:12 UTC

CEO Timeline

Mark D. MillettCurrentRetiring Jan 2027

Jan 2012 — Present(14y 8mo)

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

Donald G. SmithCurrent

Since at least Dec 2011(14y 9mo)

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.

1 source filing — 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