Arcelor merged with Mittal Steel in 2006 to create ArcelorMittal.
Arcelor was a major European steelmaker formed in 2002 through the combination of Aceralia, Arbed, and Usinor. Mittal Steel, led by Lakshmi Mittal, became one of the world’s largest steel producers through international expansion and acquisitions.
The 2006 transaction followed a contested bid and created a company with operations across many countries and a particularly strong position in Europe and the Americas. The combined group adopted the name ArcelorMittal.
The company is often described as the world’s leading steel producer, but production rankings vary by year. ArcelorMittal remains headquartered in Luxembourg and is listed on several major stock exchanges.