Milestones
| 1923 | Deutsche Bau- und Bodenbank AG (founded as Deutsche Wohnstättenbank AG, renamed in 1926) |
| 1957 | Deutsche Bau- und Bodenbank AG’s data processing centre is established, allowing mass data processing – launch of what has since become today’s GES ERP system Start of ongoing development from data centre to IT services group for the property sector |
| 1990 | Acquisition of controlling interest in WohnData |
| 1997 | Spin-off of IT Services into a separate subsidiary, BauBoden Systemhaus GmbH |
| 1999 | Group with a holding company structure is created and renamed DePfa IT Services AG. International expansion also begins |
| 2001 | Introduction of the service portal Mareon |
| 2002 | Start of cooperation with SAP AG to develop a new software generation - Blue Eagle - for the property sector Parent company DePfa Bank AG split into a Public Finance bank and a Property bank. Change of company name to Aareon AG. Aareon AG is now wholly-owned by Aareal Bank AG |
| 2004 | Launch of Blue Eagle Release 1.0 and Aareon Energy Management services |
| 2006 | Introduction of Blue Eagle Release 3.0, first-time migration of a major customer to Blue Eagle (DEGEWO Group, Berlin, with approx. 90,000 rental units) Introduction of a multi-product strategy Strategic partnership entered into with energy services provider Techem, to exchange Aareon’s Energy Management against Techem IT Services Aareon Wodis GmbH is the product of the takeover of Techem IT Services GmbH |
| 2007 | EiIntroduction and transfer of customers to Blue Eagle 4.0 Company celebrates its 50th anniversary Construction starts on new Aareon headquarters in Mainz |
| 2008 | Introduction and transfer of customers to Blue Eagle 5.0 |