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 statements 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. Further information on OMV’s operating segments is included in Note 5 – Segment reporting. The regional structure is presented below*The regions Central and Eastern Europe (including Romania, the Black Sea and Austria) and Asia-Pacific (including New Zealand, Australia and Malaysia) listed in the Director’s Report are split further in this disclosure to provide the information in a more detailed manner.: Romania and Black Sea Bulgaria, Kazakhstan (until May 2021) and Romania Austria Austria Russia Russia (until February 2022) North Sea Norway Middle East and Africa Iran (evaluation on hold), Kurdistan region of Iraq, Libya, Tunisia, United Arab Emirates, Yemen New Zealand and Australia Australia and New Zealand Malaysia SapuraOMV*Including not only Malaysia but also SapuraOMV subsidiaries in New Zealand, Australia, and Mexico. Acquisitions There were no major acquisitions during 2023, 2022, and 2021. Disposals and deconsolidation There were no major disposals during 2023. On March 1, 2022 OMV ceased to fully consolidate JSC GAZPROM YRGM Development due to the loss of control, following the Russian war on Ukraine. On August 1, 2021, SapuraOMV Upstream Sdn. Bhd. sold its share in SapuraOMV Upstream (PM) Inc., which held interests in various producing assets located offshore Peninsular Malaysia. On May 14, 2021, OMV Petrom finalized the sale of its 100% share in Kom-Munai LLP and Tasbulat Oil Corporation LLP (both based in Aktau, Kazakhstan). Held for sale On December 4, 2023 SapuraOMV was reclassified to “held for sale”. Further information is included in Note 22 – Assets and liabilities held for sale and Note 39 – Subsequent events. The Oil and Gas Reserve Estimation and Disclosures below include full amounts of the disposal group. Non-controlling interest As OMV holds 51% of OMV Petrom, which is fully consolidated. Figures therefore include 100% of OMV Petrom’s assets and results. OMV has a share of 50% in SapuraOMV and it is fully consolidated; figures therefore include 100% of SapuraOMV’s assets and results. Equity-accounted investments OMV holds a 10% interest in Pearl Petroleum Company Limited (Middle East and Africa region). On March 1, 2022 OMV ceased to equity account its 24.99% interest in OJSC Severneftegazprom (Russia region) due to loss of significant influence, following the Russian war on Ukraine. 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 final investment decisions (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. (XLSX:) Download Capitalized costs – subsidiaries In EUR mn 2023 2022 2021 Unproved oil and gas properties 1,197 1,811 2,137 Proved oil and gas properties 29,501 28,240 27,611 Total 30,698 30,051 29,749 Accumulated depreciation –20,009 –19,411 –18,136 Net capitalized costs 10,689 10,640 11,613 (XLSX:) Download Capitalized costs – equity-accounted investments In EUR mn 2023 2022 2021 Unproved oil and gas properties 146 151 164 Proved oil and gas properties 314 292 477 Total 460 443 641 Accumulated depreciation –193 –76 –99 Net capitalized costs 267 367 542 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. (XLSX:) Download Costs incurred In EUR mn Romania and Black Sea Austria Russia North Sea Middle East and Africa New Zealand and Australia Malaysia Total 2023 Subsidiaries Acquisition of unproved properties — — — — — — — — Exploration costs 35 61 — 62 28 25 38 248 Development costs 338 40 — 168 252 71 154 1,024 Costs incurred 373 101 — 231 280 96 191 1,272 Equity-accounted investments — — — — 33 — — 33 2022 Subsidiaries Acquisition of unproved properties — — — — — — — — Exploration costs 35 24 — 59 10 26 48 202 Development costs 327 21 — 159 171 188 102 969 Costs incurred 362 45 — 219 181 214 150 1,171 Equity-accounted investments — — 2 — 27 — — 29 2021 Subsidiaries Acquisition of unproved properties 1 — — 0 — — 1 3 Exploration costs 41 6 — 81 25 26 30 210 Development costs 265 38 — 243 165 102 39 852 Costs incurred 307 44 — 324 191 128 70 1,065 Equity-accounted investments — — 62 — 21 — — 83 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 are not allocated. Further information on OMV’s operating segments is included in Note 5 – Segment reporting. Income taxes are hypothetically calculated, based on the statutory tax rates and the effect of tax credits on investments and loss carryforwards. (XLSX:) Download Results of operations of oil and gas producing activities In EUR mn Romania and Black Sea Austria Russia North Sea Middle East and Africa New Zealand and Australia Malaysia Total 2023 Subsidiaries Sales to unaffiliated parties1 6 1 — 979 635 218 268 2,107 Intercompany sales 2,452 418 — 1,064 1,646 231 — 5,812 2,458 419 — 2,044 2,282 450 268 7,920 Production costs –575 –94 — –197 –181 –83 –18 –1,148 Royalties –501 –84 — — –283 –46 –10 –925 Exploration expenses2 –23 –8 — –60 –16 –8 –107 –222 Depreciation, amortization, impairments and write-ups –475 –97 — –333 –168 –214 –72 –1,358 Other costs3 –14 –17 — –116 –50 –15 –19 –231 –1,587 –300 — –707 –698 –367 –226 –3,884 Results before income taxes 871 119 — 1,337 1,584 83 42 4,036 Income taxes4 –124 –42 — –1,063 –1,273 –23 –16 –2,542 Results from oil and gas production 746 76 — 274 311 60 26 1,493 Results of equity-accounted investments — — — — –72 — — –72 2022 Subsidiaries Sales to unaffiliated parties1 5 –32 206 1,394 931 225 302 3,032 Intercompany sales 3,281 959 — 3,530 1,927 236 — 9,933 3,286 927 206 4,924 2,858 461 302 12,965 Production costs –512 –91 — –183 –183 –87 –16 –1,071 Royalties –1,102 –182 — — –312 –46 –21 –1,663 Exploration expenses2 –28 –12 — –118 2 –53 –41 –250 Depreciation, amortization, impairments and write-ups –845 –43 –12 –416 –424 46 –91 –1,785 Other costs3 –65 –15 –60 –131 –64 –2 –22 –359 –2,552 –344 –72 –848 –980 –142 –191 –5,128 Results before income taxes 734 583 135 4,077 1,878 319 111 7,837 Income taxes4 –121 –229 –28 –3,274 –1,553 –83 –34 –5,322 Results from oil and gas production 613 354 107 803 325 237 77 2,516 Results of equity-accounted investments — — 3 — 56 — — 59 Subsidiaries Sales to unaffiliated parties1 22 –649 562 876 556 279 239 1,884 Intercompany sales 1,845 432 — 1,345 1,018 122 — 4,762 1,868 –218 562 2,221 1,574 400 239 6,646 Production costs –477 –78 — –144 –146 –81 –24 –950 Royalties –404 –66 — — –135 –39 –13 –658 Exploration expenses2 –43 –5 — –108 –43 –18 –65 –281 Depreciation, amortization, impairments and write-ups –499 –102 –70 –381 –246 –127 –101 –1,526 Other costs3 –70 –14 –329 –132 –25 –5 –21 –597 –1,493 –265 –399 –766 –596 –270 –223 –4,012 Results before income taxes 375 –483 163 1,455 979 130 15 2,635 Income taxes4 –59 121 –27 –981 –750 –38 –6 –1,740 Results from oil and gas production 316 –362 135 475 229 92 10 895 Results of equity-accounted investments — — 24 — 31 — — 55 1 Including hedging effects; the Austria region includes hedging effects of centrally managed derivatives (2023: nil, 2022: EUR –33 mn, 2021: EUR –675 mn). 2 Including impairment losses related to exploration & appraisal 3 Including inventory changes 4 Income taxes in the North Sea and Middle East and Africa include corporation tax and special petroleum tax. Income taxes for 2023 and 2022 in Austria included the EU solidarity contribution. 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 a relatively major expenditure is required for recompletion or substantial new investment is required in order to safeguard or replace aging facilities. (XLSX:) Download Crude oil and NGL In mn bbl Romania and Black Sea Austria Russia North Sea Middle East and Africa New Zealand and Australia Malaysia Total Proved developed and undeveloped reserves – Subsidiaries January 1, 2021 298.8 34.0 — 44.5 270.2 8.0 5.7 661.2 Revisions of previous estimates 4.2 1.0 — 17.2 30.3 7.6 4.9 65.2 Purchases — — — — — — — — Disposals –21.4 — — — — — –2.4 –23.8 Extensions and discoveries 0.3 — — — — 0.8 — 1.0 Production –23.0 –3.6 — –15.3 –24.8 –3.5 –1.7 –71.9 December 31, 2021 258.8 31.4 — 46.4 275.7 12.9 6.5 631.7 Revisions of previous estimates –8.4 1.9 — 15.8 32.3 1.1 0.4 43.1 Purchases — — — — — — — — Disposals — — — — — — — — Extensions and discoveries 0.1 — — — — — — 0.1 Production –20.9 –3.3 — –14.7 –27.3 –3.0 –0.6 –69.9 December 31, 2022 229.6 30.0 — 47.6 280.6 11.0 6.2 605.0 Revisions of previous estimates –1.6 0.7 — 6.9 89.9 0.6 2.1 98.6 Purchases — — — — — — — — Disposals — — — — — — — — Extensions and discoveries 0.3 — — — — — — 0.3 Production –20.0 –3.0 — –13.4 –29.1 –3.6 –0.7 –69.7 December 31, 2023 208.3 27.7 — 41.1 341.5 8.0 7.6 634.2 Proved developed and undeveloped reserves – Equity-accounted investments December 31, 2021 — — — — 17.5 — — 17.5 December 31, 2022 — — — — 16.0 — — 16.0 December 31, 2023 — — — — 15.1 — — 15.1 Proved developed reserves – Subsidiaries December 31, 2021 234.2 31.4 — 40.7 189.2 6.0 1.6 503.2 December 31, 2022 206.6 30.0 — 39.4 234.5 9.2 1.7 521.4 December 31, 2023 187.6 27.7 — 32.8 252.4 8.0 1.4 509.8 Proved developed reserves – Equity-accounted investments December 31, 2021 — — — — 14.7 — — 14.7 December 31, 2022 — — — — 15.4 — — 15.4 December 31, 2023 — — — — 13.4 — — 13.4 (XLSX:) Download Gas In bcf Romania and Black Sea Austria Russia North Sea Middle East and Africa New Zealand and Australia Malaysia Total Proved developed and undeveloped reserves – Subsidiaries January 1, 2021 940.7 155.3 — 383.6 82.4 195.3 376.3 2,133.6 Revisions of previous estimates 76.2 17.7 — 7.8 80.7 115.3 212.0 509.6 Purchases — — — — — — — — Disposals –22.3 — — — — — –9.1 –31.5 Extensions and discoveries 1.5 — — — — 15.4 — 17.0 Production –130.6 –20.6 — –102.3 –17.3 –51.8 –64.5 –387.0 December 31, 20211 865.5 152.4 — 289.2 145.8 274.2 514.7 2,241.7 Revisions of previous estimates 68.1 15.2 — 144.4 –1.3 9.0 –7.9 227.6 Purchases — — — — — — — — Disposals — — — — — — — — Extensions and discoveries 1.6 — — — — — — 1.6 Production –122.0 –19.7 — –102.2 –14.7 –47.1 –60.0 –365.6 December 31, 20221 813.2 147.9 — 331.4 129.8 236.1 446.8 2,105.2 Revisions of previous estimates 464.3 13.7 — 37.0 195.5 –36.5 56.2 730.1 Purchases — — — — — — — — Disposals — — — — — — — — Extensions and discoveries 4.9 — — — — — — 4.9 Production –115.7 –18.0 — –84.5 –13.6 –53.8 –57.9 –343.6 December 31, 20231 1,166.8 143.6 — 283.9 311.7 145.7 445.0 2,496.7 Proved developed and undeveloped reserves – Equity-accounted investments December 31, 2021 — — 1,167.1 — 369.2 — — 1,536.4 December 31, 2022 — — — — 303.6 — — 303.6 December 31, 2023 — — — — 292.5 — — 292.5 Proved developed reserves – Subsidiaries December 31, 2021 779.5 84.0 — 287.0 62.5 115.4 291.9 1,620.2 December 31, 2022 723.4 80.3 — 290.8 39.9 195.9 228.9 1,559.1 December 31, 2023 628.0 76.0 — 246.8 35.0 145.7 158.5 1,290.0 Proved developed reserves – Equity-accounted investments December 31, 2021 — — 1,090.7 — 278.9 — — 1,369.7 December 31, 2022 — — — — 288.3 — — 288.3 December 31, 2023 — — — — 259.3 — — 259.3 1 Including approximately 67.6 bcf of cushion gas held in storage reservoirs 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 (twelve-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. (XLSX:) Download Standardized measure of discounted future net cash flows In EUR mn Subsidiaries and equity-accounted investments Romania and Black Sea Austria Russia North Sea Middle East and Africa New Zealand and Australia Malaysia Total 2023 Subsidiaries Future cash inflows 30,238 3,656 — 6,457 28,233 1,170 2,256 72,011 Future production and decommissioning costs –13,937 –2,276 — –2,397 –8,842 –1,412 –622 –29,486 Future development costs –3,184 –378 — –512 –1,901 –86 –71 –6,131 Future net cash flows, before income taxes 13,117 1,002 — 3,549 17,491 –327 1,563 36,395 Future income taxes –1,857 –129 — –3,265 –12,340 168 –461 –17,884 Future net cash flows, before discount 11,260 873 — 284 5,150 –159 1,103 18,511 10% annual discount for estimated timing of cash flows –4,546 –422 — –11 –2,582 169 –297 –7,689 Standardized measure of discounted future net cash flows 6,714 451 — 273 2,568 10 806 10,821 Equity-accounted investments — — — — 475 — — 475 2022 Subsidiaries Future cash inflows 29,864 7,435 — 14,937 26,611 2,051 2,248 83,145 Future production and decommissioning costs –15,951 –2,766 — –2,711 –7,771 –1,829 –690 –31,718 Future development costs –1,424 –246 — –631 –890 –222 –213 –3,626 Future net cash flows, before income taxes 12,489 4,422 — 11,594 17,950 0 1,345 47,800 Future income taxes –1,724 –1,028 — –10,465 –13,283 132 –380 –26,748 Future net cash flows, before discount 10,765 3,394 — 1,129 4,667 132 965 21,053 10% annual discount for estimated timing of cash flows –4,718 –1,815 — –184 –1,547 213 –296 –8,347 Standardized measure of discounted future net cash flows 6,048 1,579 — 945 3,120 345 669 12,705 Equity-accounted investments — — — — 451 — — 451 2021 Subsidiaries Future cash inflows 17,585 3,336 2,625 5,608 16,545 1,905 1,433 49,038 Future production and decommissioning costs –9,221 –1,612 –2,148 –2,293 –5,419 –1,647 –490 –22,831 Future development costs –1,422 –246 — –281 –776 –380 –257 –3,362 Future net cash flows, before income taxes 6,942 1,479 477 3,034 10,350 –122 685 22,845 Future income taxes –577 –264 –97 –2,541 –6,893 116 –175 –10,432 Future net cash flows, before discount 6,366 1,214 380 493 3,457 –6 510 12,413 10% annual discount for estimated timing of cash flows –3,089 –630 –71 –109 –1,100 175 –216 –5,040 Standardized measure of discounted future net cash flows 3,276 584 309 384 2,357 169 294 7,373 Equity-accounted investments — — 187 — 336 — — 523 f) Changes in the standardized measure of discounted future net cash flows (XLSX:) Download Changes in the standardized measure of discounted future net cash flows In EUR mn 2023 2022 2021 Subsidiaries Beginning of year 12,705 7,373 3,987 Oil and gas sales produced during the year, net of related production costs –7,049 –4,102 –2,262 Net change in prices and production costs related to future periods –6,538 13,243 8,231 Net change due to purchases and sales of minerals in place — — –67 Net change due to extensions and discoveries 32 7 5 Development and decommissioning costs incurred during the period 823 895 657 Changes in estimated future development and decommissioning costs –1,912 –344 –269 Revisions of previous reserve estimates 4,239 4,507 1,854 Accretion of discount 1,146 671 341 Net change in income taxes (incl. tax effects from purchases and sales) 7,539 –9,593 –4,935 Other1 –165 48 –168 End of year 10,821 12,705 7,373 Equity-accounted investments 475 451 523 1 Contains movements in foreign exchange rates vs. the EUR. 2022 was impacted by the change of consolidation method of the Russian operations. schließen Pearl Pearl Petroleum Company Limited schließen Net income Net operating profit or loss after interest and tax 40 – Direct and indirect investments of OMV AktiengesellschaftExecutive Board