ArcelorMittal Reaction to Rotterdam and Paris Court Decisions.

LUXEMBOURG & ROTTERDAM -- Regulatory News:

ArcelorMittal (Mittal Steel Company N.V.) notes today's decisions by the District Court of Rotterdam and the Tribunal de Grande Instance of Paris which reject the attempts by certain minority shareholders in Arcelor to prevent the merger of the two companies based on the announced terms.

An Extraordinary General Meeting of shareholders of Mittal Steel Company N.V. will be held, as previously announced, at 1400 CET tomorrow, 28 August 2007, at the Hotel Okura Amsterdam in Amsterdam, to resolve on the first step in the merger process.

About ArcelorMittal

ArcelorMittal is the world's number one steel company, with 320,000 employees in more than 60 countries. The company brings together the world's number one and number two steel companies, Arcelor and Mittal Steel.

ArcelorMittal is the leader in all major global markets, including automotive, construction, household appliances and packaging, with leading R&D and technology, as well as sizeable captive supplies of raw materials and outstanding distribution networks. An industrial presence in 27 European, Asian, African and American countries exposes the company to all the key steel markets, from emerging to mature, positions it will be looking to develop in the high-growth Chinese and Indian markets.

ArcelorMittal key pro forma financials for 2006 show combined revenues of USD 88.6 billions, with a crude steel production of 118 million tonnes, representing around 10 per cent of world steel output.

ArcelorMittal is listed on the stock exchanges of New York (MT), Amsterdam (MT), Paris (MTP), Brussels (MTBL), Luxembourg (MT) and on the Spanish stock exchanges of Barcelona, Bilbao, Madrid (MTS) and Valencia.