A correction – relating to estimates of illegal mining tonnes, grade and copper metal at Sulfobamba – has been made to MMG’s 2025 Mineral Resources and Ore Reserves Statement.
The following information has been updated:
Page 15
- removal of a further 15kt copper from Sulfobamba deposit at Las Bambas due to illegal mining over the last 12 months taking the total estimated depletion due to illegal mining to 90kt copper; and
Page 53
- MMG have estimated the quantity of illegally mined ore from Sulfobamba Mineral Resource to be a total 4Mt @ 2.2% Cu equating to approximately 90kt Cu metal.
Page 70
- An assessment has been conducted of the ore extracted by artisanal mining since it started in 2010 to 30 June 2025, as a result it is estimated that 2.8Mt of ore with an assumed grade of 1.2% have been extracted and are accounted as a loss to the Ore Reserve.
The correction did not necessitate any broader updates to the 2025 MROR Statement. Read the full statement here.
Andrea Atell
General Manager Corporate Affairs and Sustainability
T +61 449 689 991
E CorporateAffairs@mmg.com
Felicity Watson
Head of Communications
T +61 408 108 516
E CorporateAffairs@mmg.com