Castile Resources Ltd · ASX:CST
Castile Resources — Investor Presentation (August 2026)
17 slides from Castile Resources's investor presentation, Aug 28, 2026
Slide 1: The Rover 1 Scoping Study
CASTILE RESOURCES LTD Gold and Critical Minerals THE ROVER 1 SCOPING STUDY GOLD | COPPER | BISMUTH | COBALT | MAGNETITE AUGUST 2026 ASX:CST OTCID:CLRSF Refer to disclaimers on slides 17-18. Not an offer of securities. castile.com.au
Slide 2: Competent Person Statement and Disclaimer
COMPETENT PERSON STATEMENT AND DISCLAIMER Competent Person Statement The information contained in this presentation has been previously reported by the Company on 12 February 2020, 3 December 2019, ASX:CST 27 September 2022 Annual Report, ASX:CST 5 December 2022 Rover 1 Preliminary Feasibility Study
Slide 3: The 2026 Rover 1 Project Scoping Study
THE 2026 ROVER 1 PROJECT SCOPING STUDY A HIGH-GRADE IRON OXIDE COPPER GOLD DEPOSIT (IOCG) 2026 Rover 1 Scoping Study Results Gold Copper Bismuth Cobalt Magnetite Initial ~11-Year Mine Life Annual Average Revenue $477M The Rover 1 Project Average Annual Pre-Tax Cashflow $218.4M Pre-Production Capex $
Slide 4: 2026 Rover 1 Scoping Study Highlights
2026 ROVER 1 SCOPING STUDY HIGHLIGHTS Base Case and Upside Case Financial Highlights Project Economics Units Base Case Outcomes Upside Case Outcome Total Revenue A$M $4,784.0M $5,479.6M Project Operating Costs A$M $1,938.0M $1,936.5M Project Cash Flow A$M $1,946.0M $2,598.4M Pre-Production CAPEX A$M
Slide 5: Annual Production and Cashflow
ANNUAL PRODUCTION AND CASHFLOW Summary Units Annual Average Initial Life of Project Total Revenue (A$M) $477.2M $4,784.0 Pre-Tax Cash Flow (A$M) $218.4M $1,946.0M Production Summary Units Average Annual Production Initial Life of Project Total Ore Mined t Ore 750,000t 7,264,700t Gold (oz Au) 26,800o
Slide 6: Mineral Resource Estimate
MINERAL RESOURCE ESTIMATE OCTOBER 2025 MRE — 41% TONNAGE UPLIFT TO BE INCLUDED IN BFS Gold, Copper and Bismuth to be Updated into 2026 BFS from Increased Mineral Resource Estimate 341.3 koz 97.4 kt 8,900 t 5,200 t 1.88 Mt GOLD COPPER BISMUTH COBALT MAGNETITE +8% vs prior +17% vs prior +51% vs prior
Slide 7: Total Production and Mineral Resource Estimate
TOTAL PRODUCTION AND MINERAL RESOURCE ESTIMATE Total Production for the 2026 Rover 1 Scoping Study 269,000oz 72,200 kt 5,400 t 2,700 t 1.10 Mt GO L D CO P P ER B I S M U TH COBALT M A GN ET ITE Rover 1 Project Scoping Study Total Material Extracted and Processed Tonnes Au Cu Bi Co Fe3O4 Au Cu Bi Co
Slide 8: Bismuth: The Critical Mineral the Market Is Paying For
BISMUTH THE CRITICAL MINERAL THE MARKET IS PAYING FOR • China produces 83% of 4N (99.99%) global Bismuth Supply • Used in Missiles and new superior Microchips • Castile offers rare Western World Supply opportunity The recent addition of bismuth to the Refined Bismuth (4N) Output (t) by Country 2024e
Slide 9: Drilling Highlights
DRILLING HIGHLIGHTS 90,000M OF DIAMOND DRILLING Rover 1 : A rich, high-grade IOCG deposit B O N A NZA GO L D I N T ER CEPTS 30.4m @ 36.50 g/t Au from 506.5m (20CRD001) 7m @ 125.93 g/t Au from 542m (WGR1D034) 20m @ 32.61 g/t Au from 469m (WGR1D003) 10m @ 47.97 g/t Au from 471m (R1ARD41-1) 12m @ 58.40
Slide 10: Rover 1 Underground
ROVER 1 UNDERGROUND Proposed Rover 1 Mine Design 750ktpa 1:7 decline Annual production rate From boxcut down to the orebody Jupiter Long hole open stoping Twin ventilation shafts Zone Standard mining method Allowing diesel operations 25 m levels · 40 m stopes Open at depth & to the east Paste filled
Slide 11: Scoping Study Stage 1 Flowsheet
SCOPING STUDY STAGE 1 FLOWSHEET Crushed ore Grinding Gravity Magnetic Separator Sulphide Float Tails P8075mm Gravity Gold Bulk Sulphide Iron Ore Concentrate Regrind Fine Grind P8020mm P8020mm Magnetic Tails Copper Float Bismuth Float Separator Gold Concentrate Copper Concentrate Bismuth Concentrate
Slide 12: Scoping Study Stage 2 Flowsheet
SCOPING STUDY STAGE 2 FLOWSHEET Crushed ore Grinding Gravity Sulphide Float Magnetic Separator Tails P8075mm Gravity Gold Bulk Sulphide Iron Ore Concentrate Onsite Processing Regrind Fine Grind To Darwin Middle Arm Oxidation P8020mm P8020mm Processing (200OC & 2,254kPa) Bismuth Float Magnetic Tails
Slide 13: Funding the Rover 1 Project
FUNDING THE ROVER 1 PROJECT Capital requirement and revenue mix Total Revenue by Metal $AUD Project Development Capital Expenditure $AUD Gold $1,921.4M Mine Infrastructure $52.0M Copper $1,705.2M Process Plant $98.5M Bismuth $595.4M Surface Infrastructure $20.0M Total CAPEX $170.5M Magnetite $330.5M
Slide 14: Beneficiation & Downstream
BENEFICIATION & DOWNSTREAM Proposed Beneficiation Plant at Rover 1 Minesite [ FLOWSHEET DIAGRAM — Crushed ore → Grinding → Gravity Au → Bulk sulphide float → Magnetic separator → Gold doré, Cobalt metal, Copper metal, 96.5% Magnetite, Bismuth concentrate ] PRODUCED AT ROVER 1 SITE REFINED AT MIDDLE
Slide 15: Middle Arm Sustainable Development Precinct
MIDDLE ARM SUSTAINABLE DEVELOPMENT PRECINCT COMMONWEALTH-BACKED CRITICAL MINERALS PRECINCT Downstream refining in Darwin at MASDP CASTILE LAND ALLOCATION AT MASDP PROPOSED CASTILE CRITICAL MINERALS REFINERY AT MASDP Major Project Status Awarded by NT Government (April 2024) — accelerated approvals p
Slide 16: Capital Structure & Funding Pathway
CAPITAL STRUCTURE & FUNDING PATHWAY CAPITAL MANAGEMENT Pathway from BFS to Funding I N D I C A T IV E F U N D ING P A T H W A Y 1 Scoping Study Adds Bismuth to Project Rover 1 Scoping Study :Pre-Tax NPV8% of A$1.07B and Pre-Production CAPEX of A$171.6M 2 Offtake & Strategic Discussions Active discus
Slide 17: Castile Resources Limited
CASTILE RESOURCES LIMITED Gold and Downstream Critical Minerals GOLD | COPPER | BISMUTH | COBALT | MAGNETITE www.castile.com.au August 2026 ASX:CST OTCID:CLRSF castile.com.au
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