OROCO INCREASES ACTIVITY AT SANTO TOMAS

• Oroco Resource Corp. has mobilized a second diamond drill rig at the Santo Tomas copper project in Mexico as of April 22, 2026.
• Six holes have been completed with two additional holes currently in progress under Phase 2 drilling program.
• Core from drill holes STPH2-22 and STPH2-23 has been submitted for assay; results are pending.
• The Phase 2 program utilizes infill and confirmation drilling to upgrade mineral resource classification.
• Work includes parallel hydrogeological, geotechnical, and metallurgical programs supporting a Pre-Feasibility Study (PFS).
• Operations continue under existing senior management following the CEO resignation announced March 30, 2026.

• The mobilization of a second rig is an operational milestone that confirms execution pace but does not constitute new fundamental data.
• This news follows the February 24 announcement commencing Phase 2 drilling; therefore, it is largely expected by the market.
• The CEO resignation (March 30) remains a governance overhang, though management assurances of continuity mitigate immediate operational risk.
• No resource estimate update or PFS completion is included in this release; valuation drivers remain unchanged pending assay results.
• The financing closed January 14, 2026 ($23M CAD), provides sufficient runway for the current drilling cadence without immediate capital raising pressure.

• Flagship Project: Santo Tomas Porphyry Copper Project located in Sinaloa, Mexico (Choix district).
• Project Status: Development stage; Pre-Feasibility Study underway following 2024 PEA completion.
• Resource Estimate (August 2024): Indicated Resource 540.6 Mt at 0.37% CuEq; Inferred Resource 530.3 Mt at 0.35% CuEq.
• PEA Economics: After-tax NPV8% of US$1.48 billion and after-tax IRR of 22.2%; 22.6-year life of mine.
• Ownership: Oroco holds an 87.0% net interest in Core Concessions (1,173 ha) and 80% interest in surrounding concessions.
• Infrastructure: Proximity to Port of Topolobampo (deep-water), highway, rail access, grid power, and gas pipeline.