POSCO Holdings Inc. has announced a significant expansion in its lithium business, investing a total of KRW 1.1 trillion to secure high-quality lithium resources in Australia and Argentina. The company will acquire a 30% stake in a newly established intermediate holding company of Mineral Resources, a leading Australian mining company, for approximately USD 765 million. This move is part of POSCO's strategy to strengthen its raw material competitiveness in secondary battery materials and diversify the global lithium supply chain. The investments focus on the Wodgina and Mt. Marion lithium mines in Western Australia and the Hombre Muerto lithium brine deposit in Argentina. POSCO aims to solidify its position as a global leader in the lithium sector, contributing to the localization of secondary battery materials and supporting national economic and industrial competitiveness.