Investor AB

Report Publication Announcement • Oct 5, 2009

Stockholm, October 5, 2009

Invitation to the Media and Capital Market in conjunction with the release of Investor AB's Interim Report for January-September 2009

Press and Analyst Meeting

The meeting will be held in Stockholm on Tuesday, October 13, 2009, 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 2009.

The press conference will be in English and webcasted through our website www.investorab.com where you also can ask questions. If you prefer to listen to the presentation, please call +44 203 043 24 36, +1 866 458 40 87 or +46 8 505 598 53.

The presentation material will be published on our website after the meeting, where you can also view and listen to the proceedings of the conference afterwards on-demand.

To participate in the press and analyst meeting, please e-mail Helen Jönsson at helen.jonsson@investorab.com or call +46 8 614 2046.

The report is expected to be released around 8:15 a.m. CET the same day.

Welcome!

Oscar Stege Unger, Head of Corporate Communications: +46 8 614 2059, Mobile: +46 70 624 2059

Magnus Dalhammar, Investor Relations Manager: +46 8 614 2130, Mobile: +46 73 524 2130

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

Investor is a Nordic-based industrial holding company founded almost one hundred years ago by the Wallenberg family. Today we have investment activities in Europe, the United States and Asia. The business concept is to generate long-term attractive returns for our shareholders by owning and developing companies with solid potential for value creation. We are an engaged owner and apply experience, knowledge and a unique network to develop listed and unlisted companies to make them best-in-class.