Disclosure announcement transmitted by euro adhoc.
  The issuer is responsible for the content of this announcement.

23.02.2005

- Stake held by Bank Austria Creditanstalt AG falls below 15% 
- Free float of Wienerberger AG rises to over 85%

Vienna, February 23, 2005 - Wienerberger AG has received an
announcement in accordance with § 91 Par. 1 of the Austrian Stock
Exchange Act concerning a change in the number of Wienerberger shares
owned by Bank Austria Creditanstalt AG.

Bank Austria Creditanstalt AG previously held more than 15% of the
voting rights in Wienerberger AG. The related stock was designated as
underlying for the 3-year bond exchangeable for shares of
Wienerberger AG, which was issued by Bank Austria Creditanstalt in
January 2004. The above-mentioned announcement indicated that the
conversion of bonds has reduced the stake held by Bank Austria
Creditanstalt AG in voting rights of Wienerberger AG to below 15%.

end of announcement                    euro adhoc 23.02.2005 07:25:00 

Further inquiry note:

For additional information contact:
Thomas Melzer, Public and Investor Relations
T +43(1)60192-463 | communication@wienerberger.com

Branche: Building materials
ISIN: AT0000831706
WKN: 083170
Index: WBI, ATX Prime, ATX
Börsen: Wiener Börse AG / official dealing