Invitation to press and analyst briefing In conjunction with the release of the OMX interim report for January-September 2004, we would like to invite you to a press and analyst briefing at OMXs head office: Place: Tullvaktsvägen 15, Stockholm Date: Wednesday, October 20, 2004 Time: 10.00 CET OMXs President and CEO Magnus Böcker will present the companys financial results in English together with CFO Kristina Schauman. For those unable to attend, the presentation will be broadcast live on www.omxgroup.com. It will also be possible to listen in through a conference call by dialing the following numbers: UK +44 (0)20 7162 0181, US +1 334 323 6203, Sweden +46 8 505 201 14. Presentation slides will be made available five minutes before the start of the briefing at www.omxgroup.com. A copy of the webcast, including the presentation slides, will be available on OMXs website later in the afternoon on October 20 at www.omxgroup.com. Sincerely, Jakob Håkanson VP, Head of IR Please RSVP by October 19, 2004 before 16.00, either by faxing this form to +46 8 24 97 99, by sending an e-mail to firstname.lastname@example.org or by contacting Pia Grimberg at +46 8 405 66 09. ____ Yes, I will be able to attend. ____ No, I am unable to attend. Name Telephone.. Company .