Investor Presentaiton

The Acquisition is expected to be accretive across all key metrics... ...underpinning expected investment grade credit ratings and sustainable, enhanced shareholder returns Production¹ kboepd Unit operating costs² $/boe GHG emissions intensity³ kgCO₂e/boe Annual dividend4 Cents/ordinary share >150% >25% c.25% >5% Harbour Energy Harbour Pro forma Harbour Harbour Pro forma Harbour Harbour Pro forma Harbour Harbour Pro forma Harbour Scale and High quality, Financial strength, diversification resilient asset base Supporting the Energy Transition sustainable returns 1 Based on H1 2023 production. 2 H1 2023, Wintershall Dea opex also includes lease costs. Harbour's opex does not include lease costs. 3 GHGI is Scope 1 and 2 emissions on a net equity share basis and is based on full year 2022. 4 Based on a total dividend for 2023 of 25 cents/share and 1440.1 million Harbour ordinary shares (i.e. excluding the non-voting shares issued to LetterOne) post-completion Harbour Energy | Investor Presentation 23

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