ArcelorMittal is one of the world's largest integrated steel and mining companies, headquartered in Luxembourg. Formed by the 2006 combination of Mittal Steel and Arcelor, it runs steel-making operations in 14 countries and mining operations in the Americas, Africa and Europe, selling flat, long and tubular steel products to automotive, construction, appliance and engineering customers in about 126 countries. It is listed in Amsterdam, Paris, Luxembourg, Madrid and New York (MT) and had about 125,554 employees at the end of 2025.