Yancoal Australia Ltd published a voluntary announcement dated 25 February 2026, reporting coal resources and reserves for the year ending 31 December 2025. According to the data, total measured, indicated, and inferred coal resources remained at 4.40 billion tonnes on an attributable basis, reflecting no change compared to 2024.

Meanwhile, recoverable proved and probable coal reserves declined to 850.00 million tonnes from 920.00 million tonnes in 2024, representing a 7.6% decrease. Marketable proved and probable coal reserves reached 640.00 million tonnes, down from 680.00 million tonnes in 2024, a 5.9% drop. All figures are compiled in accordance with the Australasian Code for Reporting of Mineral Resources and Ore Reserves (JORC Code).

The report notes that commodity prices and exchange rates used to estimate economic viability are based on Yancoal's long-term forecasts, incorporating technical parameters and approvals consistent with active or planned mining leases. Yancoal states that it is unaware of any new information materially affecting these estimates and confirms that all material assumptions remain valid. The announcement emphasizes that the resources and reserves include both open-cut and underground operations, covering multiple mining sites and product categories such as thermal, semi-soft coking, and pulverized coal injection (PCI) coal types.