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