Orco Property Group SA, a developer with much of its business in central and eastern Europe, said its net loss for the first half of the year widened as the value of its real-estate portfolio fell 12%.

The net loss was €199.9m, or €18.26 a share, from €14.1m, or €1.32 euros, in the year-ago period. Revenue rose to €132.3m from 2113.2m, the Paris-based company said in a statement.