Invitation to press and analyst briefing

In conjunction with the release of the OMX Interim Report January-September 2005, we would like to invite you to a press and analyst briefing at OMX’s head office: Place: Tullvaktsvägen 15, Stockholm Date: Thursday, October 20, 2005 Time: 11.00 CET OMX’s President and CEO Magnus Böcker will present the company’s financial results in English together with CFO Kristina Schauman. Following the presentation a light lunch will be served. 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) 207 162 0083, US +1 334 323 6201, Sweden +46 8 505 201 10. 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 OMX’s website on October 21 at www.omxgroup.com. Sincerely, Jakob Håkanson VP, Head of IR Please RSVP by October 19, 2005 before 16.00, either by faxing this form to +46 8 24 97 99, by sending an e-mail to pia.grimberg@omxgroup.com 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 ………………………………………………………………………………….…