OMX – Interim Report January-March 2006

Operating income up 61 percent • Revenue during January-March amounted to SEK 903 m (742) • Operating income was SEK 334 m (207) • Income after financial items amounted to SEK 319 m (190) • Income after tax was SEK 244 m (132) • Earnings per share amounted to SEK 2.05 (1.15) • Record exchange trading – equity turnover rose 57 percent • Acquisition of operations from Computershare • Cooperation with TietoEnator Enclosed you will find OMX’ Interim Report for January-March 2006. The report is also available at www.omxgroup.com. A press and analyst briefing will be held today at 11.00 CET at OMX’s head office at Tullvaktsvägen 15, Stockholm. For those unable to attend, it will be possible to listen in via conference call at the following numbers, UK: +44 (0) 20 7162 0125, US: +1 334 323 6203, Sweden: +46 8 505 201 14. OMX’ President and CEO Magnus Böcker will present the company’s financial results in English together with CFO Kristina Schauman. For further information or comments, please contact: Magnus Böcker, CEO +46 8 405 66 44 Kristina Schauman, CFO +46 8 405 71 35 Jakob Håkanson, VP Investor Relations +46 8 405 60 42 Niclas Lilja, VP Marketing & Communications +46 8 405 63 95