Oroco Increases South Zone Certainty at Santo Tomas

• Oroco Resource Corp. released the second set of assay results from its Phase 2 drilling program at the Santo Tomás copper project in Mexico, covering holes S025, S026, S028, and S029.
• Results confirm a near-surface, low-strip copper resource that aligns with the August 2024 Technical Report block model.
• Elevated grades in the southwest South Zone support early access development plans.
• Phase 2 drilling is actively converting Inferred resources to Indicated classification and gathering geotechnical, hydrogeological, and metallurgical data for a Pre-Feasibility Study (PFS) targeted for Q2/Q3 2027.
• 22 drill holes totaling 6,709 meters have been completed, with a third rig now mobilized to the site.
• The Copper Equivalent (CuEq) methodology uses updated trailing-average metal prices (Cu $5.00/lb, Mo $25.75/lb, Au $4,070/oz, Ag $56.50/oz).
• Management confirms the program is delivering on its objective to increase resource certainty for mine planning and the upcoming PFS.

• The news is a routine validation of the August 2024 Preliminary Economic Assessment (PEA). It confirms the geological block model and supports the planned PFS timeline without introducing new economic metrics or resource upgrades.
• The results are expected and incremental, serving as a necessary step to de-risk the project for the PFS. There is no material change to the company's valuation or development pathway.
• The announcement does not trigger a market-moving event but provides positive confirmation that the project remains on track technically.

• Oroco Resource Corp. is focused on developing the Santo Tomás porphyry copper project in Sinaloa, Mexico.
• The company holds an 87% net interest in the 1,173-hectare core concessions and an 80% interest in surrounding concessions.
• The August 2024 PEA outlines a staged open-pit operation ramping from 60,000 t/d to 120,000 t/d over a 22.6-year life of mine.
• Economic metrics from the PEA include an after-tax NPV8% of US$1.48 billion and an after-tax IRR of 22.2%.
• The project benefits from proximity to the deep-water port of Topolobampo, highway and rail access, and grid power.
• Oroco has also secured an exclusive option to acquire the Vainilla concession (~2,974 ha), which contains skarn, breccia pipe, and vein targets that could provide near-term exploration upside.