Invitation to the Media and Capital Market in conjunction with the release of Investor AB’s Interim Report for January-September 2005

Press and Analyst Meeting The meeting will be held in Stockholm, Wednesday, October 12, 2005 at 11:00 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 the period January-September 2005. The presentation material will be published on www.investorab.com after the meeting. Teleconference and Webcast The teleconference will be held on Wednesday, October 12, at 3:00 p.m. CET. To participate, call +44 20 7162 0079, +1 334 323 6201 or +46 8 505 201 10. You can also view and listen to the proceedings of the conference on Investor’s website www.investorab.com 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 20 46. 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 20 31, Mobile: +46 73 524 20 31 Oscar Stege Unger, Investor Relations Manager +46 8 614 20 59, +46 70 624 20 59