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 and Aareon Energy Management services |
| 2006 | Introduction of an ERP 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 | Company celebrates its 50th anniversary Construction starts on new Aareon headquarters in Mainz |
| 2008 | Market launch of the document management system Aareon DMS Enhancement of the international business: Acquisition of the French Sylogis.com SAS (100 %) |
| 2009 | Introduction of the new Wodis Sigma product generation Merger of Sylogis.com and Aareon France |