Teleconference and Webcast in conjunction with the release of Net Asset Value Report for January-March 2004.

Teleconference and Webcast in conjunction with the release of Net Asset Value Report for January-March 2004 Investor AB will release its Net Asset Value Report for January-March 2004 around 9.00 a.m. CET on April 19. At 3.00 p.m. a webcast teleconference will be held with Marcus Wallenberg, President and Chief Executive Officer, and Lars Wedenborn, Chief Financial Officer. To participate, call +44 20 7162 0182, +1 334 420 4951 or +46 8 505 201 14. You can also view the proceedings of the conference in real time on Investor's website www.investorab.com To participate in the teleconference, please e-mail Helen Jönsson at helen.jonsson@investorab.com or call +46 8 614 2046. The webcast will be available on-demand at www.investorab.com and on the RAW Communications broadband service for RAW subscribers. Welcome! Fredrik Lindgren, Vice President, Corporate Communications Phone: +46 8 614 20 31, Mobile: +46 735 24 20 31 ------------------------------------------------------------ This information was brought to you by Waymaker http://www.waymaker.net The following files are available for download: http://www.waymaker.net/bitonline/2004/04/14/20040414BIT00280/wkr0001.doc http://www.waymaker.net/bitonline/2004/04/14/20040414BIT00280/wkr0002.pdf