Feb. 16, 2006 — Arcelor SA has received the approval of the Canadian regulatory authorities regarding its offer to acquire all of the outstanding common shares of Dofasco Inc. Arcelor has now received all regulatory approvals in the various jurisdictions in which such approvals were required.

If all conditions of the offer, including the minimum tender condition are satisfied, Arcelor will be in a position to proceed with the acquisition of the Dofasco common shares tendered to its offer at a price of CDN$71.00 per share as soon as practicable following the expiration of its offer. As previously announced, the offer had been extended to February 20, 2006.

UBS and Merrill Lynch have been acting as financial advisers and Ogilvy Renault LLP as legal advisor to Arcelor.

Established in 1912, Dofasco is a leading North American steel solutions provider. Product lines include hot rolled, cold rolled, galvanized, Extragal^(TM), Galvalume^(TM), and tinplate flat rolled steels, as well as tubular products, laser-welded blanks and Zyplex^(TM), a proprietary laminate. Dofasco's wide range of steel products is sold to customers in the automotive, construction, energy, manufacturing, pipe and tube, appliance, packaging and steel distribution industries. The company has additional operations in Canada, the United States and Mexico. Dofasco also owns 98.7% of Quebec Cartier Mining (QCM). QCM owns and operates the Mont-Wright open pit mine and a pellet plant at Port-Cartier.

Arcelor holds leadership positions in its main markets: automotive, construction, household appliances and packaging as well as general industry. The company — number one steel producer in Europe and Latin America — intends to further expand internationally in order to capture the growth potential of developing economies and offer technologically advanced steel solutions to its customers. Arcelor employs 94,000 associates in over 60 countries. The company places its commitment to sustainable development at the heart of its strategy and ambitions to be a benchmark for economic performance, labor relations and social responsibility.