Ioneer Ltd Quarterly Activities Report for September 2025

Ioneer Ltd reported significant improvements in the economics of its Rhyolite Ridge Lithium-Boron Project for the quarter ending September 30, 2025. Key highlights include a 38% increase in unlevered life of mine NPV to US$1,888 million and a 16% increase in unlevered life of mine IRR to 16.8%. The company also achieved a 20% increase in annual lithium hydroxide production and a 9% increase in annual boric acid production. Ioneer successfully raised US$2.2 million through a Share Purchase Plan and continues to engage in strategic partnering discussions to accelerate project development. The company holds all significant federal and state permits required for construction and is actively working on environmental and social initiatives, including the conservation of Tiehm’s buckwheat.