Utilization of authorization within Investor AB to repurchase own shares to hedge the company’s long-term incentive program

The Annual General Meeting of Investor AB (“Investor”) approved the proposal to authorize the Board of Directors to purchase the company’s own shares for the purpose of hedging Investor’s long-term incentive program for 2006. Investor hereby announces that the company’s board has decided to utilize authorization for this purpose. The shares will be purchased on the Stockholm Stock Exchange (Stockholmsbörsen) at a price within the registered share price interval on each occasion. INVESTOR AB For further information: Fredrik Lindgren, Vice President, Corporate Communications: +46 8 614 20 31, +46 735 24 20 31 Oscar Stege Unger, Investor Relations Manager, +46 8 614 20 59, +46 70 624 20 59