Oil and Gas Reserve Estimation and Disclosures (unaudited)

The following tables provide supplementary information in respect of the Group’s oil and gas activities. In the absence of detailed disclosure rules in this area under IFRS, the Group has elected to voluntarily disclose the data that would have been required under the ASC 932 as if it were reporting according to US GAAP.

To the extent that information refers to financial statement data, the information is based on the primary financial statements (IFRS financial statements).

Disclosed financial data refers to the Energy operating business segment excluding gas supply, marketing, trading, and logistics, and the Low Carbon Business. Further information on OMV’s operating segments is included in Note 6 – Segment Reporting.

The regional structureThe regions Central and Eastern Europe (including Romania, the Black Sea, and Austria) and Rest of the world (including New Report are split further in this disclosure to provide the information in a more detailed manner. is presented below:

Acquisitions

There were no major acquisitions during 2025, 2024, and 2023.

Disposals and Deconsolidation

On May 29, 2025, OMV signed and closed an agreement to divest its 5% stake in the Ghasha concession, located in the United Arab Emirates, to Lukoil Gulf Upstream L.L.C. S.P.C. (Lukoil). Further information is included in Note 5 – Assets and Liabilities Held for Sale.

On December 9, 2024, OMV closed the transaction to sell its 50% share in the Malaysian SapuraOMV Upstream Sdn. Bhd. to TotalEnergies.

There were no major disposals during 2023.

Non-Controlling Interest

As OMV holds a 51% share in OMV Petrom, it is fully consolidated. Figures therefore include 100% of OMV Petrom’s assets and results.

OMV had a share of 50% in SapuraOMV and it was fully consolidated; figures therefore include 100% of SapuraOMV’s assets and results until its deconsolidation.

Equity-Accounted Investments

OMV holds a 10% interest in Pearl Petroleum Company Limited (South).

The disclosures of equity-accounted investments in the tables below represent the interest of OMV in the companies.

Further Information on Significant Impacts

2023 was significantly impacted by the final investment decision (FID) for the execution of the Neptun Deep project in the Black Sea and the Hail and Ghasha development in the United Arab Emirates.

The subsequent tables may contain rounding differences.

Tables

a) Capitalized Costs

Capitalized costs represent the sum of capitalized oil and gas assets, including other intangible assets and property, plant, and equipment such as land, plant and machinery, concessions, licenses, and rights.

b) Costs Incurred

Costs incurred include all costs, capitalized or expensed, during the year in the Group’s oil and gas property acquisition, exploration, and development activities.

c) Results of Operations of Oil and Gas Producing Activities

The following tables represent only those revenues and expenses that occur directly in connection with OMV’s oil and gas producing operations. The results of oil and gas activities should not be equated to Energy net income since interest costs, general corporate overhead costs, other costs, and power production, gas supply, marketing, trading, and logistics, and the Low Carbon Business are not allocated. Further information on OMV’s operating segments is included in Note 6 – Segment Reporting. Income taxes are hypothetically calculated based on the statutory tax rates and the effect of tax credits on investments and loss carryforwards.

d) Oil and Gas Reserve Quantities

Proved reserves are those quantities of oil and gas that, through analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulation before the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain. Proved oil and gas reserves were estimated based on a twelve-month average price, unless prices are defined by contractual arrangements.

Proved developed reserves are those proved reserves that can be expected to be recovered through existing wells with existing equipment and operating methods, or in which the costs of the required equipment are relatively minor compared with the cost of a new well, and through installed extraction equipment and infrastructure operational at the time of the reserves estimate. It should be reasonably certain that the required future expenditure will be made to safeguard existing equipment within the current budget.

Proved undeveloped reserves are those proved reserves that are expected to be recovered from new wells on undrilled acreage, or from existing wells where relatively major expenditure is required for recompletion, or substantial new investment is required in order to safeguard or replace aging facilities.

e) Standardized Measure of Discounted Future Net Cash Flows

The future net cash flow information is based on the assumption that the prevailing economic and operating conditions will persist throughout the time during which proved reserves will be produced. Neither the effects of future pricing changes nor expected changes in technology and operating practices are considered.

Future cash inflows represent the revenues received from production volumes, including cushion gas held in storage reservoirs, assuming that the future production is sold at prices used in estimating year-end quantities of proved reserves (12-month average price). Future production costs include the estimated expenditure for production of the proved reserves plus any production taxes without consideration of future inflation. Future decommissioning costs comprise the net costs associated with decommissioning wells and facilities. Future development costs include the estimated costs of development drilling and installation of production facilities. For all three categories, year-end costs without consideration of inflation are assumed. Future income tax payments are calculated on the basis of the income tax rate applicable in each of the countries in which the Group operates. The present cash value results from the discounting of the future net cash flow at a discount rate of 10% per year. The standardized measure does not purport to be an estimate of the fair value of the Group’s proven reserves. An estimate of fair value would also take into account, among many other factors, the expected recovery of reserves in excess of proved reserves, anticipated changes in future prices and costs, and a discount factor representative of the risks inherent in the production of oil and gas.

f) Changes in the Standardized Measure of Discounted Future Net Cash Flows

Vienna, March 13, 2026

The Executive Board