Investor AB

Report Publication Announcement • Oct 3, 2007

Stockholm, October 3, 2007

Invitation to the Media and Capital Market in conjunction with the release of Investor AB's Interim Report for January-September 2007

Press and Analyst Meeting

The meeting will be held in Stockholm on Thursday, October 11, 2007, at 11:00 a.m. CET at Arsenalsgatan 8C. President and CEO Börje Ekholm and CFO Johan Bygge will present the interim report for January-September 2007.

The presentation material will be published on www.investorab.com after the meeting.

Teleconference and Webcast

The teleconference will be held on Thursday, October 11, at 3:00 p.m. CET. To participate, call +44 20 3023 4449, +1 646 843 4608 or +46 8 505 204 24. 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, Head of Corporate Communications +46 8 614 2031, Mobile: +46 73 524 2031

Oscar Stege Unger, Head of Investor Relations: +46 8 614 2059, +46 70 624 2059

Our press releases can be accessed at www.investorab.com on the Internet.

Investor AB SE-103 32 Stockholm, Sweden Tel +46 8 614 20 00 1 (1) A Public Company Visiting address Fax +46 8 614 21 50 Registration No 556013-8298 Arsenalsgatan 8C www.investorab.com