Reporting Framework

Principles/Material Topics

As a capital market-oriented company, Vonovia SE (hereinafter referred to as “Vonovia”) is required to publish a Non-financial Group Declaration (Sustainability Statement) in accordance with Sections 315b, 315c in conjunction with Sections 289c to 289e of the German Commercial Code (HGB). These necessary reporting requirements were implemented in the management report of the 2025 Annual Report, which was published on March 19, 2026. The Non-financial Group Declaration was prepared in full compliance with the European Sustainability Reporting Standards (ESRS) and makes up the backbone of Vonovia’s sustainability reporting.

Vonovia conducts regular materiality assessments to identify and validate the sustainability topics that are relevant to the company. The ESRS have provided a framework for this since the 2024 fiscal year. Vonovia was, however, already applying the concept of double materiality before 2024, and takes both the outside-in (financial materiality) and the inside-out (impact materiality) perspective into account when selecting the key sustainability topics. The materiality assessment process and the current valid materiality assessment are presented in detail in the section ESRS 2 IRO 1 of the Annual Report.

The materiality assessment applies to the entire Group. Vonovia applies the structure of the three sustainability pillars – environment, social and governance (ESG).

In order to be able to structure our sustainability strategy – which is based on the three ESG pillars – more precisely, we break the social pillar down further into three action areas “Society and Contribution to Urban Development”, “Homes and Customers” and “Corporate Culture and Employees”. The “Environment and Climate” action area corresponds to the E pillar, while the action area “Sustainable Corporate Governance and Responsible Business Practices” corresponds to the G pillar. You can find more details on our action areas on our Group website.

This ESG structure is also used in this ESG Factbook. In addition to selected key figures from the Non-financial Group Declaration, i.e., key figures that are assigned to the material sustainability aspects, the ESG Factbook contains supplementary key ESG figures. 

The table structure is based on the structure that, for each of the past three fiscal years (2023, 2024 and 2025), we report on a consolidated basis, also making distinctions at country level (Germany, Austria and Sweden) for the current 2025 reporting year.

Reporting Framework

Vonovia’s sustainability reporting in the Annual Report and in the ESG Factbook is based on the fiscal year and is published annually. The reporting period for this ESG Factbook relates to the 2025 fiscal year (January 1 to December 31, 2025), meaning that it picks up exactly where the 2024 ESG Factbook, which was published in April 2025, left off.

The definitions of the key figures used in the ESG Factbook are based on existing reporting frameworks and companyspecific definitions. The ESRS metric definitions – where applicable to the relevant metric – form the basis for reporting in the ESG Factbook. Other key figures are based on the Universal Standards (as amended in 2021) of the Global Reporting Initiative (GRI). Other key figures use Vonoviaspecific definitions. Where key figures are based on definitions from a reporting framework, the corresponding reference is included in a footnote to the table concerned.

The switch to the ESRS for reporting in the Non-financial Group Declaration in the 2024 Annual Report means that the scope of consolidation, as well as individual key figure definitions, were adapted to reflect this reporting framework in the ESG Factbook, too, as of 2023.

Organizational Boundaries/Scope of Consolidation

The key figures presented in the ESG Factbook reflect Vonovia SE’s activities in Germany, Austria (BUWOG AT) and Sweden (Victoriahem AB) and are based on the financial control approach. They include those companies presented in the list of shareholdings in the 2025 Annual Report that are also included in the consolidated financial statements. Entities with minority interests and apartments owned by third parties are not included.

This excludes the Deutsche Wohnen SE subsidiaries formerly allocated to the Care segment. This area was sold in full by Vonovia SE in the 2025 fiscal year. While the Care segment was classified and reported as discontinued operations in previous annual reports, the information presented in the ESG Factbook remains limited to Vonovia’s continuing operations.

Coverage

Residential property is the primary asset class in Vonovia SE’s real estate portfolio, accounting for 95.9% of rented units. With more than 62,000 buildings in the portfolio, reporting is aggregated at portfolio level (incl. all asset classes).

Data aggregation is performed at the level of individual countries and the information is consolidated at this level and at overall Group level. The key reporting figures make a distinction between the core markets of Germany, Austria and Sweden.

The breakdown can be made at country level according to the rentable area or the number of employees (headcount):

For a detailed segment analysis of the portfolio, please refer to the section entitled Portfolio Structure in the 2025 Annual Report.

Any deviations from the degree of coverage are explained directly in the corresponding tables of key figures.

Underlying Data/Estimation Techniques

As far as possible and to the extent that the data is available at the required time, we use values that have actually been measured for our data analyses. Where data availability is restricted, we use generally recognized estimation techniques, for example in the area of tenant-related utility services, which are invoiced directly to tenants. Energy certificate data forms the basis for calculating the portfolio’s heating supply and resulting greenhouse gas emissions.

Third Party Assurance

The information provided in this ESG Factbook was subjected to a separate limited assurance audit in accordance with ISAE 3000 (Revised) for Vonovia’s own purposes. The criteria used in this audit included the definitions and criteria set out in this ESG Factbook. An unqualified audit opinion was issued.

The information in this ESG Factbook was voluntarily compiled by the Executive Board of Vonovia SE in accordance with the definitions and criteria set forth in the ESG Factbook. As part of its due diligence obligations, the Management Board had the information reviewed by PricewaterhouseCoopers GmbH Wirtschaftsprüfungsgesellschaft, Frankfurt am Main, in a limited assurance engagement in accordance with ISAE 3000 (Revised). An unqualified opinion was issued.