Investor Presentaiton

Cash Costs BUMA's cash cost ex fuel (1H 2022) Lubricants 4% Tires 5% Drilling & blasting. 4% Rental 4% Others 10% Overhead & office 10% Delta Dunia & Spare parts maintenance 32% Employee compensation 32% ▸ The management team led the business to navigate through the prolonged downturn in 2020, focusing on optimizing asset utilization, strategically reducing capex, efficient inventory management and prudently reducing costs ►1H 2022 costs have included BUMA Australia, which has employee compensation as their biggest cost component vs BUMA Indonesia having spare parts & maintenance. ► 1H 2022 still includes upfront costs in order to facilitate growth efforts, unusually high-rainfall condition in the quarter causing higher costs. Benefits of those upfront costs start to be visible this year and when volume have fully ramped-up. ▸ Technology driven initiatives continued to be pursued and are expected to reduce costs sustainably going forward - STRICTLY CONFIDENTIAL - 31

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