Nucor Corporation is an American company based in Charlotte, North Carolina, that produces steel and related products.

[3][better source needed] After REO Motor Car Company, founded by Ransom E. Olds, sold its operations and initiated liquidation proceedings, a group of dissident activist shareholders, noticing the existence of a usable tax loss, successfully challenged the liquidation in a proxy fight in September 1955 and forced REO to take over a tiny nuclear services company called Nuclear Consultants, Inc. in a reverse takeover.

The company was renamed "Nuclear Corporation of America Inc." and relocated to offices in the Empire State Building in New York City.

In 1989, Nucor opened a facility in Crawfordsville, Indiana, the first mini mill in the world to produce flat rolled steel using thin-slab technology.

"[51][52] In 2016, the company unsuccessfully filed a lawsuit to block the Environmental Protection Agency from adopting a plan to control visible pollution in Arkansas.

[53] In 2023, the company signed an agreement with ExxonMobil for carbon capture and storage of up to 800,000 metric tons from its direct reduced iron plant in Convent, Louisiana.