Dalton Baretto

Orest Wowkodaw

Craig Hutchison

Guilherme Rosito

Bryce Adams

Ralph Profiti

Anita Soni

Fahad Tariq

Matthew Murphy

Gordon Lawson

Kate Nakagawa

Marcio Farid Filho

Roald Ross

Stefan Ioannou

- Ero Copper completed construction of its **Tucumã Operation** in 2024, producing its first saleable copper concentrate in July, with commercial production achieved as of **July 1, 2025**.  **[1853860_0001171843-25-006412_exh_991.htm:2]** **[1853860_0001171843-25-006412_exh_991.htm:3]** **[1853860_0001171843-25-006412_exh_991.htm:4]** 
- In 2024, the company's consolidated production totaled **40,600 tonnes of copper in concentrate** and **57,210 ounces of gold**.  **[1853860_0001171843-25-006412_exh_991.htm:2]** 
- Ero Copper anticipates a **significant year-over-year increase in copper production in 2025** due to the ramp-up of the Tucumã Operation, with Caraíba Operations alone projected to produce between **37,500 and 42,500 tonnes of copper**.  **[1853860_0001171843-25-006412_exh_991.htm:2]** **[1853860_0001171843-25-006412_exh_991.htm:3]** 
- The company reported a consolidated process water recycling rate of **89% in 2024** and total Scope 1 and 2 GHG emissions of **67,571 tonnes of CO2 equivalent in 2024**.  **[1853860_0001171843-25-006412_exh_991.htm:20]** **[1853860_0001171843-25-006412_exh_991.htm:32]** 
- Following two tragic workplace fatalities in 2024, Ero Copper initiated a **comprehensive, multi-year transformation** of its health and safety approach, including a company-wide safety program in 2025.  **[1853860_0001171843-25-006412_exh_991.htm:4]** **[1853860_0001171843-25-006412_exh_991.htm:5]** **[1853860_0001171843-25-006412_exh_991.htm:8]**

Ero Copper Publishes 2024 Sustainability Report Highlighting Production and Operational Milestones

- Ero Copper Corp. announced the remaining assay results from its **28,000-meter Phase 1 drill program** at the Furnas Copper-Gold Project, with highlights including **115 meters at 0.98% CuEq** in the deepest hole drilled to date.  **[1853860_0001171843-25-005955_exh_991.htm:0]** **[1853860_0001171843-25-005955_exh_991.htm:1]** 
- The Phase 1 program extended known mineralization to approximately **950 meters down-dip** from surface, exceeding previous estimates.  **[1853860_0001171843-25-005955_exh_991.htm:0]** **[1853860_0001171843-25-005955_exh_991.htm:1]** 
- The **17,000-meter Phase 2 drill program** is now expected to be completed in **early Q4 2025**, three months ahead of schedule.  **[1853860_0001171843-25-005955_exh_991.htm:1]** 
- These results will underpin an updated mineral resource estimate and a **Preliminary Economic Assessment (PEA)**, both anticipated in the **first half of 2026**.  **[1853860_0001171843-25-005955_exh_991.htm:1]** 
- Ero Copper holds the right to earn a **60% interest** in the Furnas project, which had an initial mineral resource estimate (effective June 30, 2024) of **35.2 million tonnes Indicated Mineral Resource** and **61.3 million tonnes Inferred Mineral Resource**, both at **1.36% CuEq**.  **[1853860_0001171843-25-005955_exh_991.htm:2]**

Ero Copper Announces Strong Drill Results and Project Milestones for Furnas Copper-Gold Project

Ero Copper (ERO)