News Focused on responsible business and value creation

Rio Tinto Exploration and Calibre Mining Initiate 2021 Exploration Program Including 5,500 Metre Drilling Campaign Prioritizing Prospective Near-Surface Copper and Copper-Gold Mineralization

Calibre Increases Mineral Reserves by Over 200% to 864,000 ounces of Gold

Calibre Announces Positive Pavon Gold Mine Pre-Feasibility Study; Pavon Norte Currently in Production; Strong Exploration Potential; After-tax NPV5% at US$1,700 gold of $106 Million

Calibre Mining Announces Management Changes

Calibre Exceeds High End of 2020 Production Guidance With 136,009 Ounces and Beats Low End of All-in Sustaining Cost[1] Guidance at $1,043 Per Ounce

Calibre Provides 2020 Resource Expansion and Infill Drilling Update; Significant Year-End 2020 Reserve Increase Expected

Pavon Norte Open-Pit Mine Delivers Initial Mill Feed to Libertad Complex, Ahead of Schedule and Under Budget

Calibre Exceeds High-End of 2020 Production Guidance Range; 2021 Production Guidance of between 170,000 and 180,000 ounces of Gold Represents Top-Line Growth of ~30%

Calibre Provides Generative Exploration Program Update

Calibre Provides Infill and Near-Mine Program Updates; Highlights Include Limon Open-Pit: 11.89 g/t Au Over 23.6 Metres & 16.97 g/t Au Over 12.2 Metres; and Panteon Underground: 62.67 g/t Au Over 4.0 Metres & 28.41 g/t Au Over 6.8 Metres

Calibre Reports Record Financial and Operating Results for Q3, Generating $46 Million in Operating Cash Flow and $30 Million in Free Cash Flow; 2020 Guidance Revised To Reflect Higher Production and Lower Costs

Calibre Mining Third Quarter 2020 Financial Results Conference Call and Webcast on Thursday November 5, 2020

Calibre Makes Final Acquisition Payments Totaling US$15.5 Million to B2Gold Ahead of Schedule; Now Debt-Free and Generating Significant Free Cash Flow

Calibre Mining Reports Strong Third Quarter Gold Production; Cash on hand at Quarter End Increased by 124% to $56 million

Calibre Provides Drilling Update, Including Highest Grade Intercept To Date of 149.4 g/t Gold over 4.8 metres at Panteon

Calibre Completes Acquisition of Remaining 70% Interest in the Eastern Borosi Gold-Silver Property from IAMGOLD

Calibre Acquires Remaining 70% Interest in the Eastern Borosi Gold-Silver Property From IAMGOLD; NI 43-101 Inferred Resources of 700,500 Ounces at 4.9 g/t Au as at May 11, 2018

Calibre Releases Multi-Year Production and Cost Outlook, including Initial Libertad Complex Preliminary Economic Assessment

Calibre Reports Second Quarter 2020 Financial and Operating Results

Calibre Mining Q2 2020 and Multi-Year Outlook Conference Call and Webcast on August 11, 2020