Investor AB

Transaction in Own Shares • May 8, 2012

Press release

Stockholm, May 8, 2012

Utilization of transfer authorization in Investor AB to secure costs for the Company's long-term variable remuneration program

The Annual General Meeting 2012 decided to authorize the Board to decide on the transfer of the Company's own shares in order to secure costs for Investor's long-term variable remuneration program. Investor hereby announces that the Company's Board has decided to utilize the authorization.

The transfer of own shares may take place on NASDAQ OMX Stockholm during the period from May 8, 2012, up to and including November 8, 2012 at a price within the from time to time registered price interval. Transfers will not be made during the thirtyday periods prior to ordinary quarterly reports, the day of the announcement included.

Investor currently owns 6,669,158 of its own B-shares and the maximum number of shares that may be transferred amounts to 1,500,000 B-shares.

For further information:

Magnus Dalhammar, Acting Head of Corporate Communications, Phone +46 8 614 2130, +46 735 24 2130

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

Founded by the Wallenberg family a hundred years ago, Investor is the leading owner of high quality Nordic-based international companies. Through board participation, our industrial experience, network and financial strength, we strive to make our companies best-in-class. Our holdings include Atlas Copco, ABB, Ericsson and Mölnlycke Health Care.