Mittal Steel Co. (Mittal) has announced on 28 August 2006 the final results of its offer for Arcelor securities, following completion of the centralization of tenders in the subsequent offering period which ran from 27 July through 17 August in Belgium, France, Luxembourg, Spain and the USA. The following additional Arcelor securities were tendered during this subsequent offering period: 12,721,665 Arcelor shares (including Arcelor shares underlying Arcelor ADSs tendered in the US offer); and 57,651 Arcelor convertible bonds (OCEANEs 2017). An additional 7,547 Arcelor shares have been acquired by Mittal as of 25 August, 2006 pursuant to the previously-announced mandatory sell-out procedure under Luxembourg law that has been open since 18 August, 2006. Together with the 594.5 million Arcelor shares and 19.9 million Arcelor convertible bonds tendered during the initial offering period closed on 13 July, these results indicate that, on the settlement date of the subsequent offering period, Mittal will hold 607,278,965 Arcelor shares and 19,916,184 Arcelor convertible bonds representing 93.72% of Arcelor’s issued share capital and 93.80% of Arcelor’s voting rights. (These figures exclude any shares that Mittal may acquire on or after the date hereof pursuant to the mandatory sell-out procedure). Pursuant to Luxembourg law, the remaining shareholders of Arcelor remain entitled to sell their Arcelor shares to Mittal at a price of EUR 40.40 per Arcelor share until 17 November, 2006 (inclusive).