Atmos Renewables, an Australian renewable energy company, has agreed to acquire Neoen’s majority stake in the 316MW Hornsdale wind farm located in South Australia. This acquisition marks a significant step for Atmos, enhancing its role as a long-term renewable energy operator across Australia.

Operational since 2017, Hornsdale supplies clean energy to the Australian Capital Territory.

The deal strengthens Atmos’s presence in the National Electricity Market (NEM) and Wholesale Electricity Market (WEM), expanding its footprint across all connected Australian states. The Hornsdale wind farm, operational since 2017, supplies clean energy to the Australian Capital Territory (ACT) government through a feed-in tariff arrangement.

Previously holding minority stakes in the three stages of Hornsdale, Atmos will assume full ownership upon the transaction’s completion, expected in late 2025. This acquisition will increase Atmos’s internally managed portfolio to over 1GW, boosting its operational capacity. Atmos Renewables CEO Nigel Baker stated: “This is a milestone that reflects not just scale, but operational maturity. 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. As we grow, we remain focused on delivering energy reliably and continuing strong, respectful relationships with the communities and stakeholders who host our projects.”

Atmos currently manages over 1.5GW of wind, solar, and battery assets across 18 projects in Australia. The company is advancing several development projects, including the 100MW/400 megawatt-hour Merredin battery energy storage system in Western Australia. In June 2025, Atmos awarded a A$65 million ($45.13 million) contract to GenusPlus Group for the design and construction of the Merredin battery energy storage system and related substation works.

This acquisition aligns with Atmos’s commitment to expanding renewable energy infrastructure and delivering sustainable energy solutions. By taking full control of Hornsdale, Atmos reinforces its dedication to supporting Australia’s clean energy goals while fostering strong community and stakeholder relationships. The company’s growing portfolio and ongoing projects position it as a key contributor to the nation’s renewable energy landscape.