Under the terms of the agreement, POSCO Holdings will acquire its 30% interest in the incorporated joint venture (indirect 15% of each of Wodgina and Mt Marion at an underlying level) for a total upfront cash consideration of US$765 million.
MinRes will retain a 70% interest in the new entity (35% at an underlying level). The agreed consideration values MinRes’ existing 50% interest in Wodgina and Mt Marion at approximately $3.9 billion.
MinRes will continue as operator of both mines under existing agreements with its joint venture partners – Albemarle Corporation at Wodgina and Jiangxi Ganfeng Lithium at Mt Marion – with MinRes’ operating entities remaining outside the new incorporated joint venture and separate from the transaction.
As part of the investment, POSCO Holdings will receive spodumene concentrate in proportion to its 30% interest, underpinning its future investment in new downstream processing facilities.
The transaction with POSCO Holdings, an emerging global leader in lithium chemical supply to Korean and Western markets, highlights MinRes’ track record of recycling capital through strategic partnerships with major global infrastructure and commodity companies to realise value and help fund future growth.
Together, MinRes and POSCO Holdings will strengthen Wodgina and Mt Marion’s position to respond to the increasing demand for Australian lithium, reflective of the assets’ Tier 1 status and significant expansion potential.
The partnership also builds on the existing relationship between MinRes and POSCO Holdings, established through the Onslow Iron joint venture. Onslow Iron has successfully ramped-up to nameplate capacity, demonstrating MinRes’ capability as a world-class operator.
The agreement has been approved by the Boards of MinRes and POSCO Holdings and completion is subject to the execution of long-form documents and customary conditions precedent such as regulatory approvals, including from the Foreign Investment Review Board and merger clearances, if required.
MinRes expects the transaction to complete in the first half of calendar year 2026 and, once received, expects to use the proceeds to repay external debt, fortify its balance sheet and position the company for its next phase of growth.
MinRes Chair Malcolm Bundey said the first-of-its-kind investment by a major Korean company into Australian lithium is a milestone for the industry.
“It signals the growing global demand for Tier 1 hard rock lithium assets and the confidence international partners have in Australia’s ability to meet that demand,” Bundey said.
“By supporting the development of new global conversion capacity, this partnership will play an important role in diversifying the global lithium supply chain and strengthen bilateral ties between Australia and Korea in critical minerals.
“This continues our stated commitment to strengthening our financial position and leveraging our core competencies of building world-class assets and recycling capital to position us for the future, while maintaining a material position in global lithium markets with Tier 1 partners.”
MinRes Managing Director Chris Ellison was pleased to meet with senior POSCO Holdings representatives in Seoul recently to finalise the landmark agreement, which deepens a strong relationship built since joining forces at Onslow Iron.
“POSCO Holdings’ investment is a testament to the long-term value of Wodgina and Mt Marion, and MinRes’ reputation as a mining operator,” Ellison said,
“Together, we are committed to developing these Tier 1 operations to meet their full potential as two of the world’s best hard rock lithium assets.
“This transaction will materially strengthen MinRes’ balance sheet, giving us the financial flexibility to pursue strategic growth opportunities across our portfolio that leverage our unique development and operational capability, and further enhance shareholder value.”
POSCO Holdings CEO In Hwa Chang said POSCO Group views the energy materials business as a core growth driver alongside its steel business.
“We are committed to securing a stable, cost‑competitive supply of raw materials to enhance our long‑term competitiveness,” Chang said.
“We value strong, dependable partnerships, and Mineral Resources has consistently demonstrated the operational excellence and long-term vision we seek. Wodgina and Mt Marion are high‑quality assets with proven scale, capable of sustaining our business for decades to come.
“Through this partnership, we will combine POSCO’s downstream expertise with MinRes’ mining capability to drive the sustainable growth of the energy materials industry and contribute to the global transition toward eco-friendly mobility.”
Learn more about MinRes’ Lithium business.
