Investor AB

Transaction in Own Shares • Apr 17, 2009

Press Release

Stockholm, April 17, 2009

Utilization of authorization within Investor AB to repurchase own shares to hedge the company's long-term share-based remuneration program for employees and synthetic shares as part of board remuneration

The 2009 Annual General Meeting of Investor AB approved the proposal to authorize the company's Board of Directors to decide on the purchase of the company's own shares for the purpose of hedging Investor's commitments and costs in connection with its 2009 long-term sharebased remuneration program for employees and the issue of synthetic shares as part of board remuneration. Investor hereby announces that the company's board has decided to utilize the authorization for these purposes.

The shares will be purchased on the Stockholm Stock Exchange (Stockholmsbörsen) before June 10, 2009 at a price within the registered share price interval on each occasion.

Investor currently owns 2,483,800 of its own B-shares and intends to buy back an additional maximum amount of 2,500,000 B-shares.

For further information:

Fredrik Lindgren, Vice President, Corporate Communications, Phone +46 8 614 2031, +46 735 24 2031

Oscar Stege Unger, Vice President, Investor Relations, Phone +46 8 614 2059, +46 70 624 2059

Our press releases can be accessed at www.investorab.com

Investor AB 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 attractive long-term 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.