Invitation - Conference Call and Lunch Presentation regarding Boliden’s Interim Report January-March 2007

Boliden will release its Interim Report for January-March 2007, on Thursday May 3.

We have the pleasure of inviting you to participate in the conference call on Thursday,

May 3 and also to attend the lunch presentation on May 4. Boliden’s President and CEO,

Mr. Jan Johansson, will present an overview of the Interim Report and reply to questions. Conference call (Eng) Thursday May 3 at 16.00 (CET)

To participate in the conference call you may choose one of the following options:

1. Telephone
Dial one of the following numbers a few minutes before the conference starts:

- from Sweden 08-5052 0110 (please dial area code)

- from abroad +44 (0)20 7162 0025

2. Boliden’s website www.boliden.com

- The conference call will be broadcast live (sound and slides).

- Slides will be available approximately one hour before the conference call.

- A recording of the conference call will be available.

Lunch presentation (Swedish) Friday May 4 at 12.00 (CET)

Venue: Operaterrassen, Karl XII:s torg, Stockholm

Please register your participation at [email protected] no later than May 3.

The lunch presentation will also be broadcast at Boliden’s website.

Yours sincerely,

Staffan Bennerdt

CFO

Boliden AB

Tel: +46 8 610 15 20