Wednesday, April 6, 2011

alstria office REIT-AG successfully closed its capital increase and the secondary placement of Captiva shares

- Not for release, publication or distribution in the United States, Australia, Canada or Japan -

• 28.2 million shares placed in the market
• Greenshoe option fully exercised
• Significantly increased free float enhances alstria's investment profile

HAMBURG, April 06, 2011 - 28,200,000 shares of alstria office REIT-AG (ISIN DE000A0LD2U1) were successfully placed in the market, including 10,000,000 shares from the capital increase. As part of the offering the selling shareholder Captiva had granted the underwriting banks the option to overallot and acquire 2.2 million shares at the offer price in addition to the base transaction. With the exercise of the greenshoe option the stake of alstria office REIT-AG's former majority shareholder decreased below 25%. As a consequence alstria's EPRA index weighting will increase from 44% to 100% as of April 8, 2011.

On behalf of the underwriting banks J.P. Morgan exercised the greenshoe option. No stabilisation measures were applied.

About alstria:

alstria office REIT-AG (alstria) is an internally managed Real Estate Investment Trust (REIT) focused on acquiring, owning and managing office real estate in Germany. alstria was founded in January 2006 and was converted into the first German REIT in October 2007. Its headquarters are in Hamburg. alstria office REIT-AG owns a diversified portfolio of properties across attractive German office real estate markets. Its current portfolio comprises 74 properties with an aggregate lettable space of approximately 821,000 sqm and is valued at approximately EUR 1.4 bn. alstria intends to expand its portfolio in the upcoming years as part of a sustainable growth strategy. The alstria office REIT-AG strategy is based on active asset and portfolio management as well as on establishing and maintaining good relationships with key tenants and decision makers. alstria focuses on long-term real estate value creation.

For further information, please see: http://www.alstria.com/

Disclaimer:

'This press release constitutes neither an offer to sell nor a solicitation of an offer to buy any securities. The securities have already been sold. This press release and the information contained herein are not for distribution in or into the United States of America ('United States'), Australia, Canada and Japan and must not be distributed to publications with a general circulation in the United States. This press release does not constitute an offer or invitation to purchase any securities in the

United States. The securities of alstria office REIT-AG have not been and will not be registered under the Securities Act of 1933, as amended ('Securities Act'), and may not be offered or sold within the United States absent registration or an exemption from the registration requirements of the Securities Act. There will be no public offering of securities in the United States.

This document is directed only at persons (i) who are outside the United Kingdom or (ii) who have professional experience in matters relating to investments falling within article 19(5) of the financial services and markets act 2000 (financial promotion) order 2005 (as amended) (the 'order') or (iii) who fall within article 49(2)(a) to (d) ('high net worth companies, unincorporated associations etc.') of the order (all such persons together being referred to as 'relevant persons'). Any person who is not a relevant person must not act or rely on this communication or any of its contents. Any investment or investment activity to which this communication relates is available only to relevant persons and will be engaged in only with relevant persons.