Ero Copper Corp. announced that it has received the Operational License for the Tucumã Project - the last remaining permitting milestone for commercial operation. With physical completion at approximately 99%, commissioning well advanced, and over 90% of the operational staff hired and trained, first concentrate continues to be expected early in the third quarter of 2024.

The total direct capital cost estimate for Project completion remains unchanged at approximately $310 million. Highlights: Permitting: Project awarded Operational License by the Pará State environmental agency, Secretaria de Estado de Meio Ambiente e Sustentabilidade (SEMAS) Construction: Physical construction of the Project has reached approximately 99% completion. All mechanical equipment and electrical installations complete, ball mill successfully handed over to operations Pre-stripping activities completed ahead of schedule, and full mining operations have commenced.

To date, approximately 110,000 tonnes of ore have been placed on the run-of-mine stockpile with an additional 55,000 tonnes of ore drilled and ready to be blasted in the mine. Process control room, on-site process laboratory, and administrative offices complete. Remaining piping, electric cabling and instrumentation installations on track to complete construction by the end of Second Quarter 2024.

Commissioning Plan: Commissioning activities continue to progress on site. First ore through primary and secondary crushers as well as screening and conveyance systems completed with approximately 10,000 tonnes of ore placed on the crushed ore stockpile to date. Mechanical completion and sub-component commissioning (lubrication, hydraulic, electrical, instrumentation and automation systems) completed.

First charge through the milling circuit completed, flotation and filtration commissioning nearing completion - Project remains on track to achieve first production and initiate Project ramp-up in early Third Quarter 2024. People & Safety: To date, there have been no lost-time injuries on the Project, with over six million hours of work completed since 2022: Additionally, all site-based management positions have been filled and over 90% of the operational staff required for full-scale operations have been hired and fully trained. Project Capital Estimate: Direct Project capital expenditure for completion remains unchanged at approximately $310 Million.