Notice of Annual General Meeting

Notice of Annual General Meeting of Shareholders, April 11, 2005 In accordance with the listing agreement with Stockholmsbörsen AB (the Stockholm Stock Exchange), Investor AB hereby also announces, by issuing a press release, the content of the notice concerning Investor’s Annual General Meeting on April 11, 2005. Attachment: Notice of Investor’s Annual General Meeting 2005. For further information: Fredrik Lindgren, Vice President, Corporate Communications: +46 8 614 20 31, +46 735 24 20 31