ArcelorMittal to Trade on a Single Order Book in Paris, Amsterdam and Brussels

Regulatory News:

From 15th January 2009, ArcelorMittal will trade on a single order book for its listing in Paris, Amsterdam and Brussels under the symbol MT. ArcelorMittal will remain a member of key NYSE-Euronext indices, in particular the CAC40 and the AEX.

About ArcelorMittal

ArcelorMittal is the world's leading steel company, with over 326,000 employees in more than 60 countries.

ArcelorMittal is the leader in all major global steel 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. With an industrial presence in over 20 countries spanning four continents, the Company covers all of the key steel markets, from emerging to mature.

Through its core values of sustainability, quality and leadership, ArcelorMittal commits to operating in a responsible way with respect to the health, safety and wellbeing of its employees, contractors and the communities in which it operates. It is also committed to the sustainable management of the environment and of finite resources. ArcelorMittal recognises that it has a significant responsibility to tackle the global climate change challenge; it takes a leading role in the industry's efforts to develop breakthrough steelmaking technologies and is actively researching and developing steel-based technologies and solutions that contribute to combat climate change.

In 2007, ArcelorMittal had revenues of $105.2 billion and crude steel production of 116 million tonnes, representing around 10 per cent of world steel output.

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

For more information about ArcelorMittal visit: www.arcelormittal.com