Castellum invests SEKm 217 and sells for SEKm 57

 Investments

At the beginning of the year there were new constructions, extension and
reconstructions with a remaining investment volume of about SEKm 550. Since
then, decided and launched major projects totalling SEKm 134 at an average yield
of just over 10% at targeted occupancy rates.

In the area Boländerna and the property Galleria Draget in Uppsala, a new
construction of 4,300 sq. m. retail area, and reconstruction of 9,700 sq. m.
retail area has been started. Leases are signed for approx. 30% of the areas and
negotiations on further approx. 20% is ongoing. The investment, which will be
completed during the second quarter 2011, is estimated to SEKm 64.

In the same area a new production for SEKm 15 has been started of fully let
1,600 sq. m. retail area. In Örebro on Aspholmen a new production for SEKm 15
has started of fully let 1,700 sq. m. retail area. Both of the new productions
are estimated to be completed by autumn 2010. On Hisingen in Gothenburg SEKm 21
have been invested in 2,000 sq. m. new retail area. The premises, which are
expected to be completed in last quarter 2010, are fully let. In central Malmö
reconstruction of 2,300 sq. m. office area has been started for a new customer.
The investment is estimated to SEKm 19 and to be completed in autumn 2010.

In the Bäckebol-area, close to E6, in Gothenburg a site leasehold has at the end
of March been acquired for SEKm 83. The acquisition includes three fully let
buildings totalling 22,700 sq. m., of which 20,900 sq. m. warehouse.

Sales

In the Backa-area in Gothenburg four smaller warehouses and office buildings
totaling approx. 9,000 sq. m. have been sold for a total of SEKm 57, equivalent
to 12% of valuation at the year end. The sale generated a profit of 6 SEKm and a
positive effect on deferred tax of SEKm 3.

On www.castellum.se names and addresses of acquired
properties are published.

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
Håkan Hellström, CEO, phone +46 31 60 74 00 / mobile +46 705-60 74 56
Henrik Saxborn, Deputy CEO, phone +46 31 60 74 00 / mobile + 46 706-94 74 50
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.