Announcement • May 23
Oroco Resource Corp. Reports Initial Assay Results from Phase 2 Resource Drilling Program At Santo Tomás Copper Project Oroco Resource Corp. reported the initial assay results from its Phase 2 resource drilling program focused on the South Zone at its Santo Tomás copper project, Choix, Sinaloa, Mexico. Results are available for drill holes S022, S023, and S024. Phase 2 Program Overview: Phase 2 is designed primarily to convert Inferred resources to Indicated classification in the South Zone and to collect geotechnical, hydrogeological, and metallurgical data required for Pre-Feasibility Study ("PFS") level mine planning. Drilling is also planned in the pillar area between the North and South Zones and along the southeastern edge of the North Zone pit shell. The PFS is targeted for release in Q2/Q3 2027. Copper Equivalent (CuEq) Reporting: CuEq grades in this release are calculated using the variable metal recovery curves from Chapter 13 of the Company’s August 2024 Technical Report (“Santo Tomás Copper Project, Sinaloa, Mexico — Technical Report on a Preliminary Economic Assessment”, filed on SEDAR+ August 2024) and the metal price deck in Table 3, reflecting 12-month trailing average prices to April 30, 2026. Copper equivalent grades in this release are not directly comparable to CuEq grades reported in the Company’s 2024 Indicated and Inferred Resource Summary Table or in earlier drill-result news releases, which used different metal price assumptions and CuEq methodologies. The Company intends to recalculate the significant-intercept database for the full drill-hole dataset using the updated CuEq calculation and make those results available on the Company’s website in due course. Quality Assurance /Quality Control: Historical drilling data used in the current exploration program were subject to the data verification procedures described in the Company’s current Technical Report. Drill collar locations are verified by differential GPS with checks against LiDAR data. Geological logging, core sampling, sample preparation, analysis, and chain of custody are governed by QA/QC protocols that include the insertion of certified reference standards, blanks, and duplicates. Samples are submitted to ALS Chemex (Hermosillo, Mexico) for sample preparation; pulps are sent to ALS Canada Ltd. (Vancouver) for analysis. Total copper, molybdenum, and silver are determined by ALS method ME-ICP61 (four-acid ICP-AES); over-limit results use ore-grade assay methods. Gold is determined by ALS method Au-AA23 (30 g fire assay with AAS finish). Announcement • May 11
Oroco Resource Corp. Appoints Charles Cryer as a Director, Effective June 16, 2026 Oroco Resource Corp. announced the appointment of Charles Cryer as a Director of the Company, effective June 16, 2026. Mr. Cryer brings more than 30 years of global capital markets experience encompassing both natural resources and emerging markets investment banking, together with earlier experience as an exploration and field engineer. He provides Oroco with both the financial expertise and technical depth to lead the Company as it advances its flagship Santo Tomás copper project. Mr. Cryer most recently worked as an independent consultant on the strategic development of mineral deposits for an East Asian client. Prior to that, he spent over nine years with RFC Ambrian, a leading Australian advisory firm, serving as their Head of London for six years. He previously held the positions of Executive Director and Co-Head of Global Emerging Market Sales at Nomura International and was a Director of EEMEA Equity Sales at Bank of America Merrill Lynch. His capital markets career began after he worked as a field engineer on North Sea oil rigs for Schlumberger and as a geophysical exploration engineer for Western Mining Corporation in Western Australia. Mr. Cryer holds a Bachelor of Engineering degree (Mining Engineering) from the University of Leeds and a Postgraduate Master's Diploma in Environmental Pollution Science, Legislation & Management from Brunel University. 
