• Blackstone secures $22.6 million placement to accelerate Mankayan Copper-Gold Project
• Discovers high-grade surface copper and gold mineralization near Mankayan deposit
• Partners with KCA to acquire high-performance drill rig for Mankayan exploration

Blackstone Minerals Limited ('Blackstone') has announced several key developments during the September 2025 quarter, including a $22.6 million capital raising to accelerate exploration at its world-class Mankayan Copper-Gold Project in the Philippines, and a strategic partnership to jointly develop the Ta Khoa Nickel Project in Vietnam. Highlights include:- Blackstone secured $22.6 million in a single tranche placement to fund an aggressive 50,000m diamond drilling program at Mankayan, backed by strong institutional support.- The company has discovered multiple high-grade surface occurrences of copper and gold mineralization near the Mankayan deposit, with rock chip samples assaying up to 6 g/t gold and 1.9% copper. This has prompted a comprehensive mapping and sampling program to further explore these promising results.- Blackstone has partnered with KCA Site Services to acquire a high-performance diamond drill rig, enhancing its cost-efficient drilling capabilities at Mankayan with the potential to reach depths of up to 1,800 meters.- The company has secured all necessary regulatory approvals to commence on-site exploration and development activities at Mankayan, including the Certificate of Precondition from the National Commission on Indigenous Peoples (NCIP) confirming Free, Prior and Informed Consent.- Blackstone has entered into a binding strategic agreement with Vietnam's Xuan Loc Tho Co. Ltd. to jointly develop the Ta Khoa Nickel Project and Refinery, reducing holding costs while positioning for growth in the nickel and Li-ion battery metals market.

Blackstone has not provided any high-importance, price-sensitive forward-looking financial metrics in this announcement.

Blackstone is focused on advancing exploration and development activities at its Mankayan Copper-Gold Project in the Philippines, including a comprehensive mapping and sampling program, an extensive geophysics program, and a 50,000m diamond drilling campaign to further unlock the potential of this world-class deposit. In Vietnam, the company's strategic partnership with Xuan Loc Tho Co. Ltd. will significantly reduce holding costs for the Ta Khoa Nickel Project while maintaining Blackstone's strategic position and potential upside exposure to the nickel and Li-ion battery metals market.