Sentinel Metals Limited · ASX:SNM
Sentinel Metals — Investor Presentation (November 2025)
30 slides from Sentinel Metals's investor presentation, Nov 18, 2025
Slide 1: Developing the advanced Columbia Gold Project in Nevada, USA
For personal use only ASX:SNM Developing the advanced Columbia Gold Project in Nevada, USA Large-scale resource, immediate exploration upside, near-term development potential Investor Presentation | November 2025
Slide 2: Disclaimer
DISCLAIMER • Disclaimer and Forward-Looking Statements information relating to the estimate included in the Prospectus and that all material assumptions and technical parameters underpinning the estimate in the Prospectus continue to apply and have not materially • This presentation (Presentation) h
Slide 3: Investment Summary
INVESTMENT SUMMARY For personal use only THE RIGHT GEOLOGY THE RIGHT PLACE THE RIGHT TEAM RAPID MINERAL USA IS A FOUNDED AND LED BY RESOURCE GROWTH PROVEN TOP-TIER GOLD EXPERIENCED MINE POTENTIAL MINING REGION BUILDERS SIGNIFICANT UPSIDE BEYOND READY FOR MODERN EXPLORATION, DEVELOPMENT THE EXISTING
Slide 4: Experienced Mine Builders
EXPERIENCED MINE BUILDERS For personal use only MARK WILLIAMS MATT HERBERT SIMON DAHROUGE ADAM RITCHIE NON-EXECUTIVE CHAIR MANAGING DIRECTOR EXECUTIVE DIRECTOR INDEPENDENT AND CO-FOUNDER AND CO-FOUNDER AND CO-FOUNDER NON-EXECUTIVE DIRECTOR • Led ASX-listed Red 5 Ltd for 10 years, • Geologist with a
Slide 5: Corporate Summary
CORPORATE SUMMARY CAPITAL STRUCTURE OUR MISSION “ “ Shares on Issue 104.1 million To deliver long-term value to all stakeholders through the For personal use only Share Price 36c Market Capitalisation $37.5 million development and production of high-quality advanced gold Cash (at completion of IPO)
Slide 6: Developing the Columbia Gold Project in Montana, USA
Developing the Columbia Gold Project in Montana, USA – advanced project with significant existing resource and near-term development potential For personal use only Strategic objective to build a portfolio of quality gold production assets to feed a central processing hub – accelerate Columbia into
Slide 7: Introducing the Columbia Gold Project
INTRODUCING THE COLUMBIA GOLD PROJECT CURRENT INFERRED JORC (2012) MINERAL AN ADVANCED EXPLORATION ASSET STATE OF MONTANA RESOURCE ESTIMATE (NOVEMBER 2024) Existing JORC Resource of 920,000oz Au at 1.34g/t Au For personal use only Large Existing Resource with Significant Exploration Upside: Existing
Slide 8: Montana is the Treasure State
MONTANA IS THE TREASURE STATE STATE OF MONTANA 150+ Significant mining legacy, with its first years major gold discovery in 1852 LIBBY EXPLORATION PROJECT For personal use only BLACK BUTTE A state rich in gold, silver, copper and ROCK CREEK COPPER PROJECT UNITED STATES OF AMERICA PGM deposits – rank
Slide 9: Recent Mining News in Montana
RECENT MINING NEWS IN MONTANA Hecla Mining just had the Libby Project For personal use only approved for next phase in the Cabinet Mountain Wilderness US Antimony Corp had their next phase approved, including large bulk - Oct 20 2025: sample Sentinel in initial talks with Contact Mill in Phillipsbur
Slide 10: A Simple Strategy for Success
1| GROW 2| COMPLETE 4| DELIVER For personal use only EXISTING TECHNICAL AND SAFE, SUSTAINABLE RESOURCE BASE ECONOMIC STUDIES PRODUCTION A SIMPLE 3| ACHIEVE PROJECT FINANCING STRATEGY 5| AND APPROVALS ACQUIRE QUALITY ASSETS TO FOR SUCCESS FEED A CENTRAL HUB ASX: SNM 10
Slide 11: Near-Term Exploration Objectives and Priorities
NEAR-TERM EXPLORATION OBJECTIVES AND PRIORITIES OVERALL OBJECTIVES IMMEDIATE PRIORITIES Au ADD RESOURCE • Via step-out drilling RESOURCE • Test extensional For personal use only OUNCES targeting addition of new DRILLING mineralisation along strike ounces along strike and and down-dip down-dip A NEW
Slide 12: Current and Upcoming Activities
CURRENT AND UPCOMING ACTIVITIES Water table and historical baselining 5+ years archives successfully identified and currently being aggregated For personal use only Full data-room and database refresh almost complete Core shed remodelling and pulp and core inventory check underway – new racking and
Slide 13: Significant Upcoming News-Flow
SIGNIFICANT UPCOMING NEWS-FLOW NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT Commence trading on the ASX For personal use only Drilling Drilling permit application Field and structural mapping CSMAT geophysical survey Diamond drilling Update to MRE Surveys, metallurgical test work and Studies Long
Slide 14: The Current Resource Is Just the Beginning
THE CURRENT RESOURCE IS JUST THE BEGINNING TOP 5 NEAR-SURFACE HITS ELEVEN RESOURCE DOMAINS OPEN • 3.1m at 106.3 g/t Au from 33.5m (DC-009) For personal use only • 3.1m at 72.0 g/t Au from 45.7m (7UP-247A) • 12.2m at 11.6 g/t Au from 1.5m (PD-90-166) • 12.2m at 9.7 g/t Au from 48.8m (PD-90-128) • 28.
Slide 15: Immediate Resource Growth Potential
IMMEDIATE RESOURCE GROWTH POTENTIAL INDEPENDENT EXPLORATION TARGET1 OPEN AT DEPTH ALONG A VAST 2KM STRIKE LENGTH Tonnes (Mt) Grade Au (g/t) Au (Koz) For personal use only Defined within a 350m wide corridor of up to 2km strike length to an average depth of ~220m below surface Low High Low High Low H
Slide 16: Large Opportunity Zone
EXISTING DEPOSIT LIMITED BY DRILLING OPPORTUNITY AT DEPTH READY TO BE UNLOCKED 0m Silica Cap For personal use only Au Ag 300m Ill-sm LARGE OPPORTUNITY ZONE zone COLUMBIA PROJECT DEPOSIT Cu REMAINS WIDE OPEN IN THE BONANZA Propylitic GRADE ZONE alteration Low-sulfidation epithermal deposits are typic
Slide 17: Columbia Section Example: 5200480N
COLUMBIA SECTION EXAMPLE: 5200480N WEST NORTH EAST For personal use only ASX: SNM 17
Slide 18: Columbia Section Example: 5200600N
COLUMBIA SECTION EXAMPLE: 5200600N WEST NORTH EAST For personal use only ASX: SNM 18
Slide 19: Exceptional Geological Setting
EXCEPTIONAL GEOLOGICAL SETTING REGIONAL GEOLOGICAL SETTING COLUMBIA PROJECT GEOLOGY GOLD MINERALISATION The regional geology of west-central Montana comprises: LOW-SULFIDATION EPITHERMAL SYSTEM For personal use only • The overthrust belt Columbia hosts classic low-sulfidation epithermal gold mineral
Slide 20: Historical Technical Work
HISTORICAL TECHNICAL WORK MORE THAN 300 TEN BULK SAMPLES 96% TOTAL COMPOSITE SAMPLES OF BETWEEN FIVE AND RECOVERIES FROM For personal use only TESTED TEN TONNE EACH GRAVITY + FLOTATION SIGNIFICANT BODY GRAVITY AND FLOTATION EXCAVATED FROM COMBINED FLOWSHEET TESTS COMPLETED TRENCHES FOR BENCH- TEST
Slide 21: Key Investment Takeaways
KEY INVESTMENT TAKEAWAYS 1| QUALITY ASSET LARGE RESOURCE IN A TIER-1 JURISDICTION For personal use only 2| GROWTH & UPSIDE STRONG GROWTH & DISCOVERY POTENTIAL 3| STRONG NEWS-FLOW EXPLORATION UNDERWAY AHEAD OF MAIDEN DRILLING GROW DEVELOP 4| ACCOMPLISHED TEAM EXPERIENCED MINE-FINDERS AND MINE BUILDER
Slide 22: Contact Us
For personal use only ASX: SNM CONTACT US MATT HERBERT SENTINEL METALS Managing Director info@sentinelmetals.com matthew.herbert@sentinelmetals.com www.sentinelmetals.com +1 807 358 6798
Slide 23: Appendix A: Geology and Resource Detail
For personal use only APPENDIX A GEOLOGY AND RESOURCE DETAIL
Slide 24: 2024 JORC Mineral Resource Estimate
2024 JORC MINERAL RESOURCE ESTIMATE • The deposit model comprised 11 subvertical COLUMBIA PROJECT 2024 MRE BY DOMAIN host structures within a 350m wide corridor over Domain Tonnes Au Au Ag Ag AuEq1 For personal use only a 2km strike zone. (t) (g/t) (troy oz) (g/t) (troy oz) (g/t) 7UP-200 Au 1.2 1.3
Slide 25: JORC Mineral Resource Estimate
JORC MINERAL RESOURCE ESTIMATE Information regarding metal equivalents COLUMBIA PROJECT 2024 MRE BY CLASSIFICATION • The MRE is constrained within a US$2,200 / Au oz optimised shell and Classification Tonnes Au Au Ag Ag AuEq AuEq For personal use only above a 0.4865g/t AuEq cut-off grade. (Mt) (g/t)
Slide 26: Appendix B: Mining Claims
For personal use only ASX: SNM APPENDIX B MINING CLAIMS
Slide 27: Mining Claims
MINING CLAIMS Patented Lode Mining Claims UNPATENTED LODE MINING CLAIMS PATENTED LODE MINING CLAIMS • Sentinel owns a 100% interest in 17 For personal use only patented claims totalling 258.6 ha (639 ac) that encompass most of the historical gold-silver resource. • Sentinel also owns a 35% interest
Slide 28: Drill Collars and Mineralisation Envelopes
DRILL COLLARS AND MINERALISATION ENVELOPES DRILL COLLARS EXAMPLE MINERALISED DOMAINS EXAMPLE MINERALISED ENVELOPE For personal use only ASX:SNM 28
Slide 29: Historical Surface Grab Samples
HISTORICAL SURFACE GRAB SAMPLES For personal use only ASX:SNM 29
Slide 30: For personal use only
For personal use only ASX: SNM
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