Mt Windsor Joint Venture

Minority-interest legacy copper / gold / base-metals joint venture in North Queensland in which Grange holds a 30% interest via BML Holdings Pty Ltd (with Thalanga Copper Mines Pty Ltd as operator). The Joint Venture comprises multiple sub-interests (Reward Copper/Gold 31.15%, Highway Copper 30%, Reward Deeps / Conviction Copper 30%, Mt Windsor Exploration Gold/Base Metals 30%) and is now being rehabilitated for future lease relinquishment expected in 2045. A voluntary Transitional Environment Program has been entered into to identify and remediate sources of pollution on site. In June 2025, the Joint Venture entered into an Option Agreement with Highway Copper Gold Pty Ltd (HCG) granting HCG a 12-month call option to purchase the Joint Venture's assets and liabilities for total consideration of A$250,000. Mining leases ML 1571, ML 1734, ML 1739, ML 10028, ML 1758 held at 30% interest. Bank guarantees of up to A$2,462,465 are held to secure rehabilitation of the Highway Reward project.