Pada 25 Juni 2002, Mittal Steel Company NV (MSC NV) melakukan merger dengan Arcelor SA -industri baja yang merupakan hasil merger dari Aceralia (Spanyol), Usinor (Perancis) and Arbed (Luksembrug) - dengan membentuk nama baru yaitu ArcelorMittal.
Lakshmi Mittal (pemilik Mittal Steel Company NV) bertindak sebagai Presiden sekaligus CEO. Keluarga Mittal menguasai saham di ArcelorMittal sebesar 43,6% (US$ 33 milyar) dan sebagai pemegang saham mayoritas. Pada tahun 2007, AM menghasilkan revenue sebesar US$ 105,2 milyar dengan opreating income sebesar US$ 10 milyar. Saat ini AMG tercatat dibeberapa bursa saham dunia antara lain: New York Stock Exchange (NYSE), Luxembroug Stock Exchange (LuxSE), Madrid Stock Exchange (BMAD), Pan-European Stock Exchange (Euronext) dan sampai dengan bulan mei 2008 berkapitalisasi dipasar modal sebesar US$ 144,37 milyar. Dengan kapasitas produksi baja sebesar 116 juta ton per tahun, AMG merupakan pemimpin pasar industri baja di dunia dengan menguasai 10% produk baja dunia dan jumlah pekerja mencapai 320.000 orang - termasuk pekerja Mittal Steel Compay NV - yang tersebar di 60 negara. Produk dari AM terbagi dalam tiga grup yaitu: Flat steel products, Long steel products and Stainless steel.
Struktur Dewan Manajemen ArcelorMittal Group adalah sebagai berikut
Lakshmi N. Mittal as Chairman and CEO (Responsible for Shared Services, Human Resources, Marketing and Commercial Coordination, Health and Safety, Global Trade Policy, Steel Contact Groups, Associations and Mandates, International Affairs, Internal Assurance, GMB Secretary)
Aditya Mittal as CFO and Member of the Group Mangement Boar (Chair of Corporate Finance and Tax Committee Responsible for Mergers and Acquisitions (M&A) and Business Development (projects and India), Flat Americas, Strategy, Investor Relations, Communications)
Michel Wurth, as Member of the Group Management Board ( Responsible for Flat Europe, Steel Solutions and Services, Product Development and R&D, Global Customers & Automotive, Plates, Packaging)
Gonzalo Urquijo, as Member of the Group Management Board (Responsible for Long Products (LCE (*), LCA), China, Stainless, Tubular Products, Corporate Responsibility, ArcelorMittal Foundation, Investment Allocation Committee (IAC) Chairman )
Sudhir Maheshwari, as Member of the Group Management Board ( Responsible for M&A and Business Development, India, Alternate Chairman of Corporate Finance and Tax Committee )
Christophe Cornier, as Member of the Group Management Board ( Responsible for Asia, Africa, India, CTO, Steel Greenfield Projects Execution, Project Manufacturing, IAC member ) Davinder Chugh, as Member of the Group Management Board (Responsible for Shared Services*, IAC member)
Sujogya Dash as Secretary to the Group Management Board:
