Ten Sixty Four Limited (ASX:X64) is an Australian-based gold producer focused on the exploration, evaluation, development, production and sale of gold properties primarily in the Asia Pacific region. The company holds a 40% indirect equity interest in Philsaga Mining Corporation, operator of the flagship Co-O Gold Mine covering 410 square kilometers in Central Eastern Mindanao, Philippines, with approximately 70 kilometers of strike length and over a decade of continuous production; an 80% direct interest in the associated gold mill for toll-treatment of ore from the Co-O Mine; and a 100% interest in a 122 square kilometer exploration portfolio in Queensland, Australia, targeting advanced gold prospects in the southern Drummond Basin. Operations span South East Asia and Australia, targeting gold deposits with subsidiaries including Philsaga Management and Holdings Inc.; the company was founded in 2002 and is headquartered in West Perth, Australia. In May 2022, the company changed its name from Medusa Mining Limited to Ten Sixty Four Limited; it entered external administration in July 2023 amid legacy tenement and ownership issues in the Philippines, deconsolidated the Co-O Mine from its financial statements effective February 2023, and shifted to earning revenue from toll-treatment fees; by February 2025, it released half-year accounts and an ASX listing update as part of ongoing restructuring efforts with standstill agreements among key entities including KDTL, MMPRC and PMC; the company was delisted from the ASX effective March 3, 2025, and now operates as a public unlisted entity.