Greymouth gas deal

4 July 2025 Contact enters gas deal with GGNZ Ltd Contact Energy (Contact) has reached a seven-year gas supply agreement with Greymouth Gas New Zealand Limited (GGNZ Ltd). The agreement to supply up to 7PJ of gas per annum will take effect from 1 October 2025, with an option to extend for a further three years from October 2032. The gas provides an opportunity for Contact to support New Zealand businesses and critical gas consumers as they transition from gas to renewable electricity. It also provides Contact with some diversification of gas supply and reduces single field reliance for meeting the needs of retail gas customers and electricity generation. In a normal hydrology year, Contact expects to generate 200GWh to 300GWh of electricity from its gas peaking units at Stratford, supporting its Clutha run of river hydro scheme, meaning that Contact’s generation will be around 98% renewable.1 Contact continues to grow its portfolio of renewable generation assets. In the past four years it has committed to invest over $2 billion in the critical energy infrastructure needed, including projects either completed or underway. “Contact is investing heavily in the renewable future for New Zealand while playing our part to support the country’s security of supply. We remain committed to being net zero in our generation operations by 2035,” said CEO Mike Fuge. “With the Greymouth agreement we can look to increase supply to New Zealand businesses that remain reliant on gas to operate. Aligned with our strategy to be a leader in the decarbonisation of the country, we will help these customers over time as they move to renewable energy.” - ends - Investor enquiries Shelley Hollingsworth Head of Corporate Finance (A) +64 27 227 2429 investor.centre@contactenergy.co.nz Media enquiries Louise Wright Head of Communications and Reputation +64 21 840 313 media@contactenergy.co.nz 1 Subject to the completion of the acquisition of Manawa Energy Limited. Based on long term average hydrological conditions and an expectation of 200GWh to 300GWh of gas generation through the Stratford peakers following the planned closure of the Taranaki Combined Cycle gas plant in late 2025.