FY25 Q4 Performance Report

MARKET RELEASE 21 July 2025 NZX: GNE / ASX: GNE FY25 Q4 Performance Report Genesis Energy continued to demonstrate strong strategic execution and operational flexibility through the fourth quarter of FY25, delivering solid performance across its diverse portfolio. A significant step was taken to secure long-term energy security, with the signing of a non-binding term sheet to maintain the Rankine units out to 2035, supported by long-dated Huntly Firming Options (HFOs) and a jointly funded coal reserve. During the quarter, 100 GWh of Rankine Generation was related to existing Security Products The transition to a single Genesis brand is well underway, aiming to streamline operations and enhance customer experience, with the integration of Frank and Ecotricity progressing, and Frank customer migration expected in Q2 FY26. Q4 Performance Highlights: • Construction of the Huntly BESS (100MWx2hr) has commenced, with the land contractor mobilised for site enablement works, keeping the project on track. • Customer Flexibility initiatives continued to expand, with the hot water trial successfully shifting 1.43 GWh of electricity demand across 17,000 households, reducing peak energy use. • Furthermore, the Ecobulb programme surpassed 260,000 units distributed, potentially removing an estimated 13.5 MW of peak energy demand by lowering evening grid load. • Genesis demonstrated exceptional operational agility, leveraging a short-term flexible gas deal with Methanex, which delivered 33TJ, enabling the minimisation of thermal generation during low-price periods. • Our flexible thermal generation capabilities were effectively utilised, showing a +/- 200 MW swing capability within the market, supported by strong returns from asset-backed trading. • Ensuring winter readiness, Huntly Unit 1 successfully returned from its early June 2025 outage, making all three Rankine Units available for the colder months. • Finally, our Hydro Plant exhibited strong reliability and availability, maximising high hydrological inflows, with Rangipo G5 (60MW) returning from overhaul to ensure full hydro plant availability for winter. ENDS For investor relations enquiries, please contact: David Porter Investor Relations Manager M: 020 4184 1186 For media enquiries, please contact: Estelle Sarney External Communications Manager M: 027 269 6383 About Genesis Energy Genesis Energy (NZX: GNE, ASX: GNE) is a diversified New Zealand energy company. Genesis sells electricity, reticulated natural gas and LPG through its retail brands of Genesis and Frank and is one of New Zealand’s largest energy retailers with approximately 500,000 customers. The Company generates electricity from a diverse portfolio of thermal and renewable generation assets located in different parts of the country. Genesis also has a 46% interest in the Kupe Joint Venture, which owns the Kupe Oil and Gas Field offshore of Taranaki, New Zealand. Genesis had revenue of $NZ3.0 billion during the 12 months ended 30 June 2024. More information can be found at www.genesisenergy.co.nz