For immediate release

Mittal Steel & Arcelor hold Investor Roadshow

05 July 2006 – London / Rotterdam – Mittal Steel and Arcelor reiterated their 2006 proforma EBITDA forecast of € 12 to 12.5 billion for the combined company at a joint investor roadshow today in Paris. This is based on the individual guidance for 2006 provided by both companies. A copy of the investor presentation and information disclosed at this event is available from the Mittal Steel website www.mittalsteel.com.

About Mittal Steel

Mittal Steel Company is the world’s largest and most global steel company. The company has operations in sixteen countries, on four continents. Mittal Steel encompasses all aspects of modern steelmaking, to produce a comprehensive portfolio of both flat and long steel products to meet a wide range of customer needs. It serves all the major steel consuming sectors, including automotive, appliance, machinery and construction.

For 2005, Mittal Steel had revenues of US$28.1 billion and steel shipments of 49.2 million tons. The company trades on the New York Stock Exchange and the Euronext Amsterdam under the ticker symbol “MT”.

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Forward-Looking Statements

This document may contain forward-looking information and statements about Mittal Steel Company N.V., Arcelor S.A. and/or their combined businesses after completion of the proposed acquisition. These statements include financial projections and estimates and their underlying assumptions, statements regarding plans, objectives and expectations with respect to future operations, products and services, and statements regarding future performance. Forward-looking statements may be identified by the words “believe,” “expect,” “anticipate,” “target” or similar expressions. Although Mittal Steel’s management believes that the expectations reflected in such forward-looking statements are reasonable, investors and holders of Arcelor’s securities are cautioned that forward-looking information and statements are subject to numerous risks and uncertainties, many of which are difficult to predict and generally beyond the control of Mittal Steel, that could cause actual results and developments to differ materially and adversely from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include those discussed or identified in the filings with the Netherlands Authority for the Financial Markets and the SEC made or to be made by Mittal Steel, including (in the latter case) on Form 20-F and on Form F-4. Mittal Steel undertakes no obligation to publicly update its forward-looking statements, whether as a result of new information, future events, or otherwise.

No Offer

No offer to exchange or purchase any Arcelor shares or convertible bonds has been or will be made in The Netherlands or in any jurisdiction other than Luxembourg, Belgium, Spain, France and the United States. This document does not constitute an offer to exchange or purchase any Arcelor shares or convertible bonds. Such an offer is made only pursuant to the official offer document approved by the appropriate regulators.

Important Information

In connection with its proposed acquisition of Arcelor S.A., Mittal Steel has filed and will file important documents (1) in Europe, with the Commission de Surveillance du Secteur Financier (CSSF) in Luxembourg, the Commission Bancaire, Financière et des Assurances (CBFA) in Belgium, the Comisión Nacional del Mercado de Valores (CNMV) in Spain and the Autorité des marchés financiers (AMF) in France, including local versions of the Information Document approved by the CSSF, the CBFA and the AMF (AMF approval no. 06-139) on May 16, 2006 and by the CNMV on May 22, 2006 and local versions of supplements thereto approved by such regulators on May 31, 2006 (AMF approval no. 06-169) and July 4, 2006 (AMF no. 06-250), and a Share Listing Prospectus approved by the Autoriteit Financiële Markten (AFM) in The Netherlands on May 16, 2006 and supplements thereto approved by the AFM on May 31, 2006, June 23, 2006 and July 4, 2006 and (2) with the Securities and Exchange Commission (SEC) in the United States, including a registration statement on Form F-4, a Prospectus for the exchange offer, an Amended and Restated Prospectus and related documents. Investors and Arcelor security holders outside the United States are urged to carefully read the Information Document and the Share Listing Prospectus, including the supplements thereto, which together contain all relevant information in relation to the Offer. Investors and Arcelor security holders in the United States are urged to carefully read the registration statement on Form F-4, the Amended and Restated Prospectus and related documents. All such documents contain important information. Investors and Arcelor security holders may obtain copies of such documents free of charge on Mittal Steel’s website at www.mittalsteel.com. In addition, the French version of the Information Document is available on the AMF’s website at www.amf-france.org, the Spanish version of the Information Document is available on the CNMV’s website at www.cnmv.es, and the registration statement on Form F-4, the Amended and Restated Prospectus and related documents are available on the SEC’s website at www.sec.gov.

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