Brostaden - GreenBuilding Partner of the Year in Europe

Castellum's subsidiary Fastighets AB Brostaden has been awarded as the European
GreenBuilding Corporate Partner of the Year in Europe. This award is a
verification of the company's successful work with energy savings. Brostaden has
reduced the energy consumption by an average of 39% among its 90 properties.

About 100 European companies participated in the competition and were judged on
both quantitative and qualitative criteria.

For more information see www.brostaden.se .

Brostaden is a subsidiary of Castellum who has been working with environmental
issues since the mid-90s with a focus on energy savings and environmental
inventory of the properties.

Two of Castellum's subsidiaries, Fastighets AB Brostaden and Harry Sjögren AB,
have as the first and the third company in Europe been assigned as GreenBuilding
Corporate Partner by the EU, which means that the energy consumption has been
reduced with at least 25% in at least 30% of the real estate portfolio. Within
Castellum there are a total of 80 GreenBuilding classified buildings, comprising
398 thous. sq.m.

Eklandia Fastighets AB received in 2009 the first BREEAM-certificate in Sweden
for  a new property on Hisingen in Gothenburg. The property was completed in
cooperation with Toyota.

Castellum is one of the major listed real estate companies in Sweden. The fair
value of the real estate portfolio amounts to approx. SEK 30 billion, and
comprises premises for office, retail, warehouse and industrial purposes. The
real estate portfolio is owned and managed by six wholly owned subsidiaries with
strong local roots in five growth regions: Greater Gothenburg, the Öresund
Region, Greater Stockholm, Mälardalen and Eastern Götaland.
Castellum is listed on NASDAQ OMX Stockholm AB Large Cap.

For further information, please contact
Anders Nilsson, CEO Fastighets AB Brostaden, phone +46 08 602 33 19
Håkan Hellström, CEO Castellum AB, phone +46 31 60 74 00 / mobile +46
705-60 74 56

or visit www.castellum.se

Castellum AB (publ) discloses the information provided herein pursuant to the
Securities Markets Act and/or the Financial Instruments Trading Act.