1 – Basis of preparation Index123 OMV Aktiengesellschaft (registered in the Austrian Register of Companies with its office based at Trabrennstraße 6–8, 1020 Vienna, Austria), is an integrated, international oil, gas and chemical company with activities in Upstream and Downstream. These financial statements have been prepared and are in compliance with International Financial Reporting Standards (IFRSs) as adopted by the EU and in accordance with the supplementary accounting regulations pursuant to Sec. 245a, Para. 1 of the Austrian Commercial Code (UGB). The financial year corresponds to the calendar year. The consolidated financial statements are in general based on the historical cost principle, except for certain items that have been measured at fair value as described in Note 2 – Accounting policies, judgements and estimates. The consolidated financial statements for 2020 have been prepared in million EUR (EUR mn, EUR 1,000,000). Accordingly, there may be rounding differences. The consolidated financial statements comprise the financial statements of OMV Aktiengesellschaft and the entities it controls (its subsidiaries) as at December 31, 2020. The financial statements of all consolidated companies are prepared in accordance with uniform group-wide accounting policies. A list of subsidiaries, equity-accounted investments and other investments is included under Note 38 – Direct and indirect investments of OMV Aktiengesellschaft – including consolidation method, business segment, place of business and interest held by OMV. The consolidated financial statements for 2020 were approved and released for publication by the Supervisory Board on March 10, 2021. schließen IFRSs International Financial Reporting Standards schließen EU European Union schließen EUR Euro schließen mn Million Basis of Preparation and Accounting Policies2 – Accounting policies, judgements and estimates 102-45 gri-id41:102-45