Mittal Steel Co. NV (Mittal Steel) has announced that the Luxembourg Commission de Surveillance du Secteur Financier, the Belgian Commission Bancaire, Financière et des Assurances, the Spanish Comision Nacional del Mercado de Valores and the French Autorité des marchés financiers have approved the second Information Document Supplement relating to Mittal Steel’s recommended offer for Arcelor on 4 July 2006. The Dutch Autoriteit Financiële Markten has also approved today a third Share Prospectus Supplement. A response prospectus containing the unanimous recommendation of Arcelor’s board of directors relating to Mittal Steel’s offer should be published shortly by Arcelor. The acceptance period, during which shareholders are able to tender their shares into the offer, will last until 13 July 2006 (inclusive). Depending on the duration of the centralization process, the results of the offer should be announced on 26 July 2006 and the settlement and delivery of the offered shares and cash should occur on 1st August 2006.