Invitation: Interim Report January-March 2006

Invitation to Media and Capital Market in conjunction with the release of Investor AB’s Interim Report for January-March 2006

Press and Analyst Meeting The meeting will be held in Stockholm, Thursday, April 20, 2006, at 10:30 a.m. CET. The venue is Investor’s head office at Arsenalsgatan 8C. President and CEO Börje Ekholm and CFO Lars Wedenborn will present the Interim report for January-March 2006. The presentation material will be published on www.investorab.com after the meeting. Teleconference and Webcast The teleconference will be held on Thursday, April 20, at 4:30 p.m. CET. To participate, call +44 20 7162 0125, +1 334 323 6203 or +46 8 505 201 14. You can also view and listen to the proceedings of the conference live on Investor’s website www.investorab.com, or afterwards on-demand. To participate in the press and analyst meeting or teleconference, please e-mail Helen Jönsson at helen.jonsson@investorab.com or call +46 8 614 2046. The report is expected to be released around 8:30 a.m. CET the same day. Welcome! Fredrik Lindgren, Vice President, Corporate Communications +46 8 614 2031, Mobile: +46 73 524 2031 Oscar Stege Unger, Investor Relations Manager +46 8 614 2059, +46 70 624 2059