Investor Presentaiton

Harbour Energy Production of 186 kboepd underpinning significant free cash flow generation Strong performance from our operated UK hubs offset by deferred partner wells and extended planned shutdowns Production kboepd 2023 Production 200 150 100 50 175 208 186 0 2021 2022 Natural Production decline efficiency New 2023 wells Balance of oil and gas kboepd UK gas Int'l gas Oil NGLS Operated asset production efficiency vs UK average % ¹Excludes appointed operator assets East Irish Sea, Tolmount and Catcher. 2Source: NSTA data and reflects average UK production efficiency in 2022. Harbour Energy | Investor Presentation 84 77 Harbour¹ UK average production efficiency² 10

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