Sweco

Declaration of Voting Results & Voting Rights Announcements • Mar 28, 2013

PRESS RELEASE

28 March 2013

Number of shares and votes in Sweco after conversion

At the request of a shareholder, 3,300 class A shares have been converted to class B shares during March 2013 with the support of the conversion clause in the Articles of Association. As per 28 March 2013 the total number of votes amounts to 17,592,212.3, of which the class A shares correspond to 9,378,364 votes and the class B shares to 8,213,848.3 votes. The total number of shares is 91,516,847, of which 9,378,364 are of class A and 82,138,483 are of class B. The share capital amounts to SEK 91,516,847.

On the date of publication of this information, Sweco holds 381,465 class B shares in treasury. However, Sweco has no voting rights for the class B treasury shares.

For additional information please contact:

Lisa Lagerwall, General Counsel at Sweco, +46 8 695 66 16, lisa.lagerwall@sweco.se

Sweco is an international consulting group with combined expertise in consulting engineering, environmental technology and architecture. Sweco has annual sales of approximately SEK 7.5 billion and 7,800 employees in 12 countries. The company has projects currently underway in some 80 countries worldwide. Sweco is listed on NASDAQ OMX Stockholm AB.

Sweco discloses the information provided herein pursuant to the Securities Markets Act and/or the Financial Instruments Trading Act. The information was submitted for publication on 28 March 2013, at 09:00 CET.