Interim Report, 1st January - 30th September 2005

“Boliden reports a historically strong result” Comparison between the first nine months of 2005 and 2004 • Net sales: SEK 14,118 million (SEK 13,310 m). • Operating result: SEK 1,484 million (SEK 1,320 m). • Result after financial items: SEK 1,231 million (SEK 1,013 m). • Net result: SEK 857 million (SEK 928 m). • Earnings per share: SEK 2.96 (SEK 3.90). • Cash flow from operating activities: SEK 1,593 million (SEK 1,257 m). • Net debt/equity ratio: 64 per cent (94%). Comparison between Q3 2005 and Q3 2004 • Net sales: SEK 4,939 million (SEK 4,265 m). • Operating result: SEK 701 million (SEK 405 m). • Result after financial items: SEK 610 million (SEK 315 m). • Net result: SEK 435 million (SEK 298 m). • Earnings per share: SEK 1.50 (SEK 1.18). • Cash flow from operating activities: SEK 632 million (SEK 347 m). Other matters • A new Board of Directors for Boliden was appointed at an Extraordinary General Meeting held in October. Anders Ullberg was appointed Chairman of the Board and Carl Bennet was appointed Deputy Chairman. • In September Boliden augmented its copper-price hedging of planned copper production. This hedging previously covered 40 per cent for a period of one year and now covers 67 per cent up to and including February 2007. • Boliden believes that the result after financial items for 2005 will exceed that for 2004, when a historically strong result was reported. A marked improvement in free cash flow is also expected in 2005.

Contact persons for information: Jan Johansson, President and CEO jan.c.johansson@boliden.com Tel.: +46 8 610 16 02 Mobile:+46 70 555 02 02 Ulf Söderström, Senior VP, Group Communications ulf.soderstrom@boliden.com Tel.: +46 8 610 15 57 Mobile: +46 70 618 95 95 Staffan Bennerdt, CFO Staffan.bennerdt@boliden.com Tel.: +46 8 610 15 20 Mobile: +46 70 513 61 14 See attached the complete Interim Report www.boliden.com