Sentinel Metals Limited · ASX:SNM
Sentinel Metals — Investor Presentation (August 2026)
31 slides from Sentinel Metals's investor presentation, Aug 20, 2026
Slide 1: Creating a Premier North American Gold Growth Company
Creating a Premier North American Gold Growth Company Transformational acquisition of 1.0Moz Nevada Gold Project Outstanding drilling success at Columbia Gold Project, Montana ASX: SNM General Meeting Presentation | 20 August 2026
Slide 2: Disclaimer
DISCLAIMER DISCLAIMER Disclaimer and Forward-Looking Statements information relating to the exploration results and mineral resource estimates included in the Prospectus, and that all material assumptions and technical parameters underpinning the mineral resource estimate in the • This presentation
Slide 3: Board
BOARD MARK WILLIAMS MATT HERBERT SIMON DAHROUGE ADAM RITCHIE NON-EXECUTIVE CHAIR MANAGING DIRECTOR EXECUTIVE DIRECTOR INDEPENDENT NON- AND CO-FOUNDER AND CO-FOUNDER AND CO-FOUNDER EXECUTIVE DIRECTOR • Former MD of Red 5 Ltd (ASX:RED) for • Geologist with a metals and mining • Geologist with 11 years
Slide 4: Corporate Summary
CORPORATE SUMMARY CAPITAL STRUCTURE* OUR MISSION “ “ Shares on Issue 104.1 million To deliver long-term value to all stakeholders through the Share Price (at 18 August 2026) 60.5c Market Capitalisation $63.0 million development and production of high-quality advanced gold Cash (at 30 June 2026) $3.7
Slide 5: Investment Overview
INVESTMENT OVERVIEW COLUMBIA PROJECT COLUMBIA PROJECT A COMPELLING NORTH AMERICAN GROWTH PLATFORM BIG BIG 20KM SPRINGS SPRINGS ▪ Acquisition of the Big Springs Gold Project in Nevada from PROJECT PROJECT Capricorn Metals (ASX:CMM) on track for completion late-August ▪ High-grade 1Moz JORC Resource i
Slide 6: The Big Springs Project, Nevada
Big Springs The Big Springs Project Nevada
Slide 7: Transformational Big Springs Acquisition
TRANSFORMATIONAL BIG SPRINGS ACQUISITION CREATING A PREMIER NORTH AMERICAN GOLD GROWTH COMPANY ▪ Attractive Valuation: Sentinel is acquiring a mine-permitted 1Moz North American gold asset at an attractive price, reflecting its status as a non-core asset within Capricorn’s portfolio following its ac
Slide 8: Acquisition Terms
ACQUISITION TERMS BIG SPRINGS TRANSACTION ▪ Acquisition of 100% of the Big Springs Gold Project in Nevada (the “Project”) from Capricorn Metals Limited (“Capricorn Metals”) (ASX:CMM) (the “Proposed Acquisition”) Transaction Structure ▪ Includes all tenements, infrastructure, mining rights and suppor
Slide 9: Project Highlights
PROJECT HIGHLIGHTS FOUNDATION: +1Moz Au Resource on a LOCATION: 93km² of prime Mining Lease in NE Nevada prospective Carlin-style gold tenure EXPLORATION OPPORTUNITY: Under- QUICK START: 2026 explored package, adjacent to +13Moz drill program ready to execute Au mine complex & 70km from the Carlin (
Slide 10: Foundation: High-Grade 1Moz JORC Resource
FOUNDATION HIGH-GRADE +1MOZ JORC RESOURCE LOCATED ON A GRANTED MINING LEASE Big Springs 15.5Mt @ 2.0g/t for 1.01Moz Mining Lease BIG SPRINGS MINERAL RESOURCE Classification Tonnes Grade Contained Gold (Kt) (g/t Au) (troy Koz) Measured 860 4.7 129 Indicated 6,000 2.2 426 Inferred 8,630 1.7 459 Total
Slide 11: Location
LOCATION 93KM² OF PRIME PROSPECTIVE CARLIN-STYLE GOLD TENURE ▪ The Big Springs Mine and surrounding property is located within the prolific and well-endowed Independence Trend in Elko County, Nevada ▪ The Independence Trend has a long history of development and production that dates from the 1860’s
Slide 12: Exploration Opportunity
EXPLORATION OPPORTUNITY LIMITED DRILLING BEYOND RESOURCE WITH UNTESTED DEPTH EXTENSIONS High grade shoots open at depth, drill-ready on ML Cross Section GW03-26C 17.7M @ 26.8 G/T AU SCC-1483 17.7M @ 33.4 G/T AU SCC-1500 13.7M @ 10.4 G/T AU SCC-1485 32.0M @ 11.8 G/T AU Only 29 drill holes greater tha
Slide 13: Permitting: Approved Mine Plan of Operations
PERMITTING APPROVED MINE PLAN OF OPERATIONS ▪ Granted authorisations: A major operational advantage via a Mine Plan of Operations, fully approved by the United States Forestry Service (USFS) ▪ Permitted Scope: Permits both open pit and underground mining across all core deposits ▪ Immediate executio
Slide 14: Potential Development Pathway
POTENTIAL DEVELOPMENT PATHWAY MINE DESIGN COMPLETED BY SMD IN 2019 ▪ Small Mine Design (SMD) Beadles Creek completed a mine design plan (no current mine design). Needs additional drilling in 2019 for both the open pit North Sammy UG Ore Shoots and underground operations 701 UG ▪ The 601 pit has both
Slide 15: A Processing Solution Next Door
A PROCESSING SOLUTION NEXT DOOR THREE PROCESSING OPTIONS WITHIN TRUCKING DISTANCE ▪ Big Springs hosts refractory, Carlin-style gold mineralisation, requiring processing through a roaster or autoclave ▪ Nevada has three permitted gold roasters, underscoring the strategic importance of processing infr
Slide 16: Mine Development Areas
MINE DEVELOPMENT AREAS MINE DESIGN COMPLETED BY SMD IN 2019 ASX:SNM 16
Slide 17: The Columbia Gold–Silver Project, Montana
The Columbia Gold–Silver Columbia Project Montana
Slide 18: Columbia Gold Project
COLUMBIA GOLD PROJECT COLUMBIA GOLD PROJECT STATE OF MONTANA CURRENT INFERRED JORC (2012) MINERAL AN ADVANCED EXPLORATION ASSET RESOURCE ESTIMATE (NOVEMBER 2024) 920,000oz Au at 1.34g/t Au Large Existing Resource with Significant Exploration Upside: JORC In addition to the MRE, an (2012) MRE of 920,
Slide 19: The Current Resource
THE CURRENT RESOURCE THE CURRENT RESOURCE TOP 5 NEAR-SURFACE HITS ELEVEN RESOURCE DOMAINS OPEN • 3.1m at 106.3 g/t Au from 33.5m (DC-009) • 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) • 28.9m at 3.9 g/t Au from 3
Slide 20: Resource Growth Potential
RESOURCE GROWTH POTENTIAL OPEN AT DEPTH ALONG A INDEPENDENT EX PLORATION TARGET1 VAST 2KM STRIKE LENGTH Tonnes (Mt) Grade Au (g/t) Au (Koz) 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 High 22 27 1.1 1.4 800 1,200 MRE
Slide 21: Maiden Drill Program
MAIDEN DRILL PROGRAM • Drilling commenced 6 June 2026 • 21 new HQ drill holes • Targeting based on HSAMT, field structural mapping, grab sampling, drone EM surveys and clay zone recommendations from geological consultant Dr Greg Corbett • Drilling goals: ✓ Improve Resource confidence ✓ NW strike ext
Slide 22: Significant Results from First Hole
SIGNIFICANT RESULTS FROM FIRST HOLE • Maiden diamond drill-hole, DDC026-001, intersected: • 46.8m @ 5.5g/t Au from 88.2m, including: • 21.4m @ 11.1g/t Au from 97.6m; and • 13.5m @ 16.6g/t Au from 105.5m • High-grade zone bracketed by mineralisation: • 17.3m @ 1.1g/t Au from 88.2m • 16.0m @ 1.0g/t Au
Slide 23: Summary: Multiple Upcoming Catalysts
SUMMARY: MULTIPLE UPCOMING CATALYSTS CREATING A TIER-1 NORTH AMERICAN GOLD DEVELOPMENT PLATFORM September 2026 Quarter • Shareholder meeting to approve Big Springs acquisition and placement – 20 August 2026 • Completion of $15m placement and issue of shares • Ongoing drilling and assays from Columbi
Slide 24: Contact Us
ASX: SNM CONTACT US Managing Director info@sentinelmetals.com matthew.herbert@sentinelmetals.com www.sentinelmetals.com +1 807 358 6798 24
Slide 25: Appendix A: Geology and Resource Detail
Appendix A Appendix A Geology and Resource Detail
Slide 26: Big Springs Mineral Resource Estimate
BIG SPRINGS MINERAL RESOURCE ESTIMATE Big Springs Mineral Resource Estimate (JORC 2012) (November 2022) Deposit Measured Indicated Inferred TOTAL kt g/t Au koz kt g/t Au koz kt g/t Au koz kt g/t Au koz North Sammy 345 6.6 73.4 698 3.1 70.6 508 2.4 39.1 1,552 3.7 183.1 North Sammy Contact - - - 439 2
Slide 27: Exploration Opportunity
EXPLORATION OPPORTUNITY UNDER-EXPLORED PACKAGE ADJACENT TO THE JERRITT CANYON COMPLEX (9.85MOZ PRODUCED + 4.1MOZ MRE M&I) ▪ Gold at Jerritt Canyon is hosted in carbonate rocks in Mining Lease the oldest (deepest) portion of this complex ▪ At Big Springs, the known and mined mineralisation is hosted
Slide 28: Exploration Opportunity
EXPLORATION OPPORTUNITY DRILL PROGRAM READY TO EXECUTE TARGETING MINERALISED SHOOT EXTENSIONS ▪ At least seven NW-oriented ore shoots are open at depth ▪ Existing drilling does not test down- dip extensions, true thickness of mineralisation across faults or extensions along strike to the northwest o
Slide 29: Columbia Project Mineral Resource Estimate
COLUMBIA PROJECT MINERAL RESOURCE ESTIMATE COLUMBIA PROJECT MINERAL RESOURCE ESTIMATE • The deposit model comprised 11 subvertical host COLUMBIA PROJECT 2024 MRE BY DOMAIN structures within a 350m wide corridor over a 2km Domain Tonnes Au Au Ag Ag AuEq1 strike zone (t) (g/t) (troy oz) (g/t) (troy oz
Slide 30: Columbia Project Mineral Resource Estimate Cont'd
COLUMBIA PROJECT MINERAL RESOURCE ESTIMATE CONT’D Information regarding metal equivalents • The MRE is constrained within a US$2,200 / Au oz optimised shell and COLUMBIA PROJECT 2024 MRE BY CLASSIFICATION above a 0.4865g/t AuEq cut-off grade • The MRE has been optimised and reported using a gold equ
Slide 31: Columbia Project Exploration Target
COLUMBIA PROJECT EXPLORATION TARGET The Exploration Target is based on the results of exploration activities undertaken to date, including the drill hole database containing 319 reverse circulation holes and 24 diamond drill holes. The Exploration Target shells surround the existing Mineral Resource
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