Germany's Alstria Office REIT posted higher than expected results in 2011 mainly due to EUR 169 mln worth of acquisitions including the EUR 85 mln purchase of offices from Vastned O/I. The Hamburg-based real estate investment trust posted total revenues of nearly EUR 91 mln last year, up 1.9% on the year before and slightly ahead of analysts' expectations of EUR 89 mln. In 2012, the company is forecasting a further increase in revenues to EUR 95 mln.