Press representatives and analysts are invited to a briefing held by OMX on Wednesday, October 24, 2007, in conjunction with the presentation of OMX interim report for January - September 2007. The report is scheduled for publication at 8:00 a.m. CET on the same date. Time of briefing: 11:00 a.m. CET Venue: OMX's premises at Tullvaktsvägen 15, Stockholm The report will be presented by President and CEO Magnus Böcker and CFO Kristina Schauman. A light lunch will be served following the presentation. The press and analysts briefing will be broadcast live at www.omxgroup.com. The OMX website will also include presentation material for downloading. If you are unable to attend in person, it is also possible to participate in the presentation via teleconference on the following numbers: +46 (0) 8 505 202 70 (Sweden), +44 (0) 208 817 9301 (UK), +1 718 354 1226 (USA). A copy of the webcast will be available on www.omxgroup.com from October 24. Please register not later than 4:00 p.m. CET on October 23, 2007 by either (1) faxing this form to +46 (0)8-405 60 01, (2) sending an email to pia.grimberg@omxgroup.com or (3) contacting Pia Grimberg at +46 (0)8- 405 66 09. ____ Yes, I will attend. ____ No, I am unable to attend. Name ……………………………………………Telephone………………………………………… Company ……………………………………………………………………………………………………… About OMX | OMX is a leading expert in the exchange industry. The OMX Nordic Exchange comprises over 800 companies including its alternative market First North. OMX provides technology to over 60 exchanges, clearing organizations and central securities depositories in over 50 countries. The Nordic Exchange is not a legal entity but describes the common offering from OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. OMX is a Nordic Large Cap company in the Financials sector on the OMX Nordic Exchange. For more information, please visit www.omxgroup.com.