As of October 2026 Steel Dynamics has a market cap of A$48.89 Billion. This makes Steel Dynamics the world's 722th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Oct 9th, 2026 the market cap of Steel Dynamics was reported to be: