Sidenor SA informs the investment community that, pursuant to Law 3556/2007, to the Decision 1/434/3.7.2007, the Circular 33 of the Hellenic Capital Markets Commission, the ATHEX Rules and Regulations and following the notification received by its shareholder VIOHALCO S.A. on 8/10/2009, that on 7/10/2009 VIOHALCO S.A. held, directly and indirectly via its subsidiaries ALCOMET S.A. and DIATOUR S.A., 66,976,611 voting rights or 69.67% out of the total Company's voting rights (96,129,491), versus 64,087,192 voting rights (66.67%) that it held at the last notification as at 5/3/2009. ALCOMET S.A. currently owns 3,550,835 voting rights or 3.69% of the share capital and DIATOUR S.A. owns 2,726,376 voting rights or 2.84% of the share capital.