ArcelorMittal Announces the Repurchase of 25 Million Shares from Carlos Tassara International

Regulatory News:

ArcelorMittal, under its share buy-back program, hereby announces that on Tuesday 19 February 2008 it has repurchased 25 million shares from Carlo Tassara International SA.

The shares were repurchased at a price of EUR 46.60 per share and for a total amount of EUR 1,165,000,000.

For more information on the share buy-back program see the Corporate Governance section under Investors & Shareholders on the ArcelorMittal website at (www.arcelormittal.com).

About ArcelorMittal

ArcelorMittal is the world's largest and most global steel company, with 310,000 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 28 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 2007 show revenues of USD 105.2 billion, with a crude steel production of 116 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 and Valencia (MTS).