Atmos Renewables has announced an agreement to acquire Neoen’s majority interest in the 316 MW Hornsdale Wind Farm in South Australia, marking a major expansion of the company’s renewable generation portfolio and reinforcing its national presence as a long‑term operator in the sector.
The deal cements Atmos Renewables’ role as one of Australia’s leading clean energy companies.
With settlement expected in the latter half of 2025, following completion of customary conditions precedent, Atmos will assume full ownership and operational control of the flagship wind farm.
The company previously held minority stakes across all three stages of the Hornsdale project, which has been supplying clean energy to the ACT Government since 2017 under a long‑term feed‑in tariff arrangement.
The acquisition represents a milestone for Atmos, pushing its internally managed portfolio above 1GW for the first time.
This growth benchmark underscores the company’s operational maturity and places Atmos among the top five renewable generation owner‑operators in Australia by installed capacity, with more than 1.5GW of wind, solar, and battery assets across 18 projects nationwide.
Nigel Baker, Chief Executive Officer of Atmos Renewables, said the step change in operational scale was about more than just adding capacity.
“This is a milestone that reflects not just scale, but operational maturity,” Baker said.
“Managing more than 1GW of clean energy assets in-house signals that we’re here for the long haul and set up for further growth – with the people, systems and experience to operate responsibly and efficiently at scale.”
He added that growth in asset ownership would not come at the expense of social engagement or community trust.
“As we grow, we remain focused on delivering energy reliably and continuing strong, respectful relationships with the communities and stakeholders who host our projects,” he said.
The Hornsdale acquisition will also consolidate Atmos’ geographic footprint.
With construction now underway on the 150 MW / 300 MWh Merredin Battery Energy Storage System (BESS) in Western Australia, Atmos will become the only owner‑operator with renewable generation assets across all states connected to the National Electricity Market (NEM) and the Wholesale Electricity Market (WEM).
Industry analysts see the move as strategically significant, allowing Atmos to leverage its diversified national platform as energy markets transition to higher shares of renewable supply.
The scale of in‑house management enhances Atmos’ ability to optimise operational performance, integrate storage, and respond flexibly to market conditions.
At the same time, the company is keen to highlight its community commitments.
Atmos has pledged to continue all existing community and First Nations programs associated with Hornsdale, nurturing long‑standing ties with local stakeholders in South Australia.
This includes ongoing support for the Canberra Institute of Technology’s Renewable Energy Centre of Excellence, which is linked to the project through its supply arrangements to the ACT.
The Hornsdale Wind Farm has been a landmark project for Australia’s clean energy industry since its commissioning, as one of the largest wind projects to underpin government policy commitments.
With full ownership transferring to Atmos, the site’s role in supplying sustainable energy to households and supporting local economic development is expected to be maintained and strengthened.
Looking ahead, Atmos is also advancing several gigawatts of renewable energy developments across Australia, positioning the company to continue scaling its contribution to the nation’s energy transition.
By combining operational growth with development momentum, Atmos is underlining its ambition to remain a central figure in the country’s decarbonisation journey.
For Baker, the acquisition represents not only a transactional milestone but also a clear statement of the organisation’s long‑term direction.
With Hornsdale fully under its control and new projects like the Merredin BESS on the horizon, Atmos Renewables now enters its next phase as a truly national operator — one combining scale, operational capability, and a commitment to the communities and institutions that support the shift to clean energy.