Steel Dynamics

Mining and metalsFort Wayne, IndianaSTLDAbout 14,400 employees

More about Steel Dynamics

Steel producer and metals recycler that is also building an aluminum flat-rolled products business

Revenue

$18.2B

Fiscal 2025, up about 4%

Employees

About 14,400

As of December 2025

Stock

STLD

Nasdaq

Headquarters

Fort Wayne, Indiana

CEO

Mark Millett

Since January 2012; Theresa Wagler to become CEO on January 1, 2027

Main businessesSteel operations, metals recycling, steel fabrication, aluminum

Current strategyRamping up its Columbus, Mississippi aluminum flat-rolled mill to sell recycled-content sheet for cans, autos and industry

CompetitorsNucor, Cleveland-Cliffs, Commercial Metals

Related companiesNucor

Checked October 11, 2026 · Sources: sec.gov, sec.gov (2), sec.gov (3)

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