Sweco

Declaration of Voting Results & Voting Rights Announcements • Aug 31, 2011

PRESS RELEASE

31 August 2011

Number of shares and votes in Sweco after conversion

By shareholder request, 3,399 class A shares have been converted to class B shares during August 2011 with the support of the conversion clause in the Articles of Association. The total number of votes thereafter amounts to 17,598,793.1, of which the class A shares correspond to 9,385,676 votes and the class B shares to 8,213,117.1 votes. The total number of shares is 91,516,847, of which 9,385,676 are of class A and 82,131,171 are of class B.

At the time of publication of this information, Sweco holds 698,320 class B shares in treasury, since the company continuously acquires shares based on the related authorisation granted by the 2011 Annual General Meeting. However, Sweco has no voting rights for the class B treasury shares. The share capital amounts to SEK 91,516,847

For further information please contact: Bo Jansson, Vice President & CFO of SWECO AB (publ), 08-695 66 06, 0734-12 66 06. bo.jansson@sweco.se

Fredrik Hedlund, Head of Communications, 08-695 66 12, 0734-12 66 12. fredrik.hedlund@sweco.se

Sweco is an international consulting group with combined expertise in consulting engineering, environmental technology and architecture. Sweco has about 6,000 employees in 11 countries and recorded annual sales of approximately SEK 5.3 billion in 2010. The company has projects currently underway in some 80 countries worldwide. Sweco is listed on NASDAQ OMX Stockholm AB.

The information contained herein is subject to the disclosure requirements of Sweco AB pursuant to the Swedish Securities Exchange and Clearing Operations Act and/or the Financial Instruments Trading Act. The information was submitted by Sweco for publication at 08:30 on 31 August 2011.

Pho ne +4 6 8 69 5 60 0 0 E-mail info@sweco.se w w w. sw eco g ro up .c o m

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