Algo Grande completes phase 1 drilling at Adelita

Executive Summary

• Algo Grande Copper Corp. provided a comprehensive exploration update on its 100%-owned Adelita project in Sonora, Mexico, detailing the completion of a Phase 1 drill program and a property-wide surface prospecting campaign.
• A new high-grade skarn zone was identified at the Potrero South target, located approximately 3km south of the flagship Cerro Grande discovery, featuring over 300m of surface exposure and rock samples exceeding 3% Cu.
• Mineralization was confirmed across five additional targets (Las Trancas, Cerro Grande NW, La Molina, Mezquital, and Potrero South), reinforcing a district-scale multideposit system with Phase 2 drilling scheduled for Q2 2026.

Key Details

• Phase 1 Drilling (Cerro Grande): Drill core from holes AG-GC-001, AG-GC-002 (450-600m), AG-GC-003, and AG-GC-004 delivered to ALS Hermosillo; assays pending. Previous results from AG-GC-002 confirmed three previously unknown high-grade skarn horizons extending from surface to 390m depth, remaining open at depth.
• Cerro Grande Intercepts: Five high-grade skarn horizons define the system, with >70m cumulative mineralization in AG-GC-002, including 36m grading above 1% Cu.
• Potrero South Target: New skarn occurrence with 300m surface exposure. 14 rock samples show Cu mineralization; 3 >1% Cu, 4 >1 g/t Au. Peak assay: 3.06% Cu, 3.72 g/t Au, 232 g/t Ag. To be included in Phase 2 drill program (Q2 2026).
• Las Trancas Target: Confirmed Cu-Ag mineralization with hematitic/sericitic alteration. Historical trenching returned 9.5m of 16.4 g/t Au and 1.9% Cu. Four new samples returned 3 >1% Cu, with a peak of 41.40% Cu, 13.45 g/t Au, and 1,570 g/t Ag. Prioritized for Phase 2 drilling near historical adit.
• Cerro Grande NW Target: Mineralization confirmed on both limbs of the anti-cline. Eight samples yielded max values of 0.98% Cu, 0.85 g/t Au, and 31.40 g/t Ag, potentially adding 1.5km of strike to the discovery zone.
• La Molina Target: Newly identified via machine learning algorithms (GSM Geoscience). Five samples show Cu mineralization; 2 >1% Cu. Peak assay: 1.99% Cu, 17.90 g/t Au, 44 g/t Ag.
• Mezquital Target: Porphyry system reconnaissance identified Cu float and tourmaline breccia float samples. Three samples show Cu mineralization; 1 >1% Cu. Peak assay: 1.58% Cu, 2.02 g/t Au, 82.10 g/t Ag.
• Surface Prospecting Campaign: January 2026 campaign collected 49 rock samples, 19 of which graded above 1% Cu.
• Market Making Agreement: Engaged ICP Securities Inc. for automated market-making services starting March 2, 2026. Fee is $7,500/month + taxes for a 4-month initial term, auto-renewing monthly. No performance factors or stock options involved.
• Laboratory & QA/QC: All samples sent to independent ALS Geochemistry Hermosillo (ISO/IEC 17025 accredited). Gold analyzed via fire assay with atomic absorption finish; Cu/Ag/multielements via ICP with four-acid digestion. QA/QC includes certified reference materials, blanks, and duplicates.

Notable Quotes

• "All the data we are processing at the Adelita project is pointing to a rich multideposit geological system, which includes skarn-porphyry and epithermal mineralization across the Adelita land package. The new skarn zone discovered has never been drilled and represents a new high-grade copper-gold-silver opportunity, three km away from Cerro Grande." – Enrico Gay, CEO