#1X DevEx RESOURCES LTD Exploring Australia's Discovery Hotspots October 2023 ASX: DEV#2☐ ㅁ ப Important Information Forward Looking Statements This Presentation contains forward-looking statements which are identified by words such as 'may', 'could', 'believes', 'estimates', 'targets', 'expects', or 'intends' and other similar words that involve risks and uncertainties. These statements are based on an assessment of present economic and operating conditions, and on a number of assumptions regarding future events and actions that, as at the date of this Presentation, are considered reasonable. Such forward-looking statements are not a guarantee of future performance and involve known and unknown risks, uncertainties, assumptions and other important factors, many of which are beyond the control of the Company, the Directors and the management. The Directors cannot and do not give any assurance that the results, performance or achievements expressed or implied by the forward-looking statements contained in this Presentation will actually occur and investors are cautioned not to place undue reliance on these forward-looking statements. The Directors have no intention to update or revise forward-looking statements, or to publish prospective financial information in the future, regardless of whether new information, future events or any other factors affect the information contained in this Presentation, except where required by law or the ASX listing rules. No offer to sell or invitation to buy This Presentation is not, and should not be considered to, constitute any offer to sell, or solicitation of an offer to buy, any securities in DevEx Resources Limited, and no part of this Presentation forms the basis of any contract or commitment whatsoever with any person. DevEx Resources Limited does not accept any liability to any person in relation to the distribution or possession of this Presentation from or in any jurisdiction. Disclaimer Whilst care has been exercised in preparing and presenting this Presentation, to the maximum extent permitted by law, DevEx Resources Limited and its representatives: make no representation, warranty or undertaking, express or implied, as to the adequacy, accuracy, completeness or reasonableness of this Presentation; accept no responsibility or liability as to the adequacy, accuracy, completeness or reasonableness of this Presentation; and accept no responsibility for any errors or omissions from this Presentation. Competent Person Statement The information in this Presentation that relates to Exploration Results for the Nabarlek, Sovereign, and Kennedy Projects are extracted from the ASX announcements titled: "Significant New Uranium Intercepts in Step-Out Drilling at Nabarlek North" released on 18 October 2023; • • • • • • • • "Nabarlek Continues to Deliver with More Strong Uranium Hits Across Multiple Prospects" released on 18 September 2023; "Drilling continues to expand extensive distribution of shallow rare earth mineralisation at Kennedy Project" released on 18 September 2023; "Infill drilling demonstrates continuity of Ionic Adsorption Clays at Kennedy Project, Queensland" released on 22 August 2023; "Step-out Drilling Intersects More Significant Uranium at Nabarlek as 2023 Exploration Gathers Momentum" released on 15 August 2023; "Positive Leaching Testwork Confirms Significant Ionic Adsorption REE Clays at Kennedy, Qld" released on 10 July 2023; "Extensive Rare Earth Elements (REE) in Surface Clays, Kennedy Project, Qld" released on 16 May 2023; "More Significant Uranium at Nabarlek" released on 15 March 2023; "More High-Grade Uranium Across Multiple Prospects Confirms Outstanding Growth Potential at Nabarlek" released on 24 January 2023; "High-Grade Uranium Confirmed at Nabarlek" released on 29 November 2022; "More Significant Uranium Intersected at Nabarlek" released on 19 October 2022; "High-Grade Uranium Intersected at Nabarlek" released on 9 August 2022; "DevEx ramps-up exploration at Nabarlek Uranium Project, NT after identifying new high-grade targets" released on 29 September 2021; "Technical review recognises strong similarities between U40 prospect and the Coronation Hill U-Au-PGE deposit" released on the 9 May 2019; "UEQ Identifies High Grade Copper-Gold and Base Metal Potential at NT Uranium Prospects" released on the 4 October 2017; and "Higher Uranium Grades Returned from U40 Prospect - Nabarlek" released on the 16 December 2010; all of which are available on www.devexresources.com.au. The Company confirms that it is not aware of any new information or data that materially affects the information included in the relevant original market announcement and that all material assumptions and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. Exploration by Other Explorers This Presentation contains information sourced from the reports of Other Explorers. References to the original reports are provided as footnotes where the information is cited in this Presentation. The Company does not vouch for the accuracy of these reports. The Company has taken the decision to include this information as it is in the public domain and has assessed it to be of relevance to shareholders and investors. 2#3Exploring Australia's discovery hot-spots Sovereign Project PERTH Highway Project Nabarlek Uranium Project Murphy West Kennedy Project • Alligator Rivers Uranium Province, NT • Nabarlek Project - Targeting high-grade uranium and copper-gold, surrounding the historical Nabarlek Uranium Mine (24 Mlbs @ 1.8% U3O8 produced) . Unique - One of very few ASX companies exploring high-grade uranium in Australia • Following up multiple, shallow, high-grade uranium intercepts surrounding the historical uranium mine Murphy West Uranium Project, NT • • Large early-stage ground holding (5000km²) prospective for near surface uranium Exploring the same geology as the Westmoreland Uranium Deposits which lie to the east Kennedy Rare Earth Element (REE) Project, Qld Extensive Ionic Adsorption REE clays identified in drilling - Early-stage drilling identifies extensive >1000ppm Total Rare Earth Oxide Intercepts in clays from surface Metallurgy confirms Ionic Adsorption REE Clay mineralisation Extensive drill campaign underway Highway Nickel Sulphide JV Project, WA New earn-in agreement to explore for massive nickel sulphide mineralisation north of Kalgoorlie - Plans to carry out ground electromagnetic (EM) survey to explore for massive nickel sulphides. Positive results would see drilling fast tracked to test targets 3#41 2 3 4 5 Corporate Overview Capital Structure1 Shares Options and Performance Rights Market Cap Cash² Assets Major Shareholders Tim Goyder (Chairman) 370.8M 11.85M $107.5M (at 29c³) $12.7M entX Limited (4.6%) Patented technology to recover uranium from phosphate fertilizer4 Lachlan Star Limited (36.46%)5 17.52% Paradice Investment Management Pty Ltd Top 20 6.21%6 45.15% Does not include the impact of the Placement and Entitlement Offer announced on 13 October 2023 At 30 June 2023 Closing Price on 17 October 2023 Formerly PhosEnergy Limited: https://www.entx.com.au/ Pursuant to the proposed sale of the Company's NSW assets, the Company will hold 36.46% of the issued capital of ASX listed, Lachlan Star Limited (ASX release: 3 August 2023) 6 As per the Form 603 lodged on 25 August 2022 Board of Directors Tim Goyder Chairman Mining executive with strong track record of successful investment and value creation for shareholders. Chairman of Liontown Resources, NED of Minerals 260 and EntX, former Chairman of Chalice Mining. Brendan Bradley Managing Director Geologist for 25+ years with extensive experience in exploration and development of epithermal gold deposits. Highly experienced in intrusive related nickel-copper-PGE deposits. Senior management at Perilya Ltd, Dominion Mining Ltd and Kingsgate Consolidated Ltd. Stacey Apostolou Executive Director 30+ years experience in the mining and exploration industry. Finance executive for a number of publicly listed companies. Most recently CFO for (formerly) EMR Capital owned Golden Grove and Capricorn Copper. Bryn Jones Non-Executive Director Industrial chemist with over 20 years of experience in the uranium industry, including the development and operation of ISR uranium mines. MD of EntX Limited and NED of Boss Energy and Australian Rare Earths. Richard Hacker Non-Executive Director Finance executive with 25+ years corporate and commercial experience in the energy and resources sector. Strategy and Commercial General Manager for Chalice Mining and former CFO of Chalice Mining and Liontown Resources.#5Major uranium asset in Australia's highest-grade uranium province The Alligator Rivers Uranium Province, NT (ARUP) +500 Million Pounds U3Og endowment (mined and current Resources 1,2) Close analogue to uranium deposits in the Athabasca Basin in Canada DevEx's Nabarlek Project (100%) • . Centered on the historical Nabarlek Uranium Mine Production History: 24 Mlbs @ 1.84% UŽO¹ DevEx holds a dominant ground position of +4,700sq.km Granted Tenure: Mining Lease and three exploration tenements Multiple uranium prospects surrounding Nabarlek mine Exploration Focus Uranium Deposit DevEx Tenements Granted EL's and ML Cainozoic Cover McArthur Basin Sandstone & Volcanics Pine Creek Basin/Cahill Fm Granite Production History 2 Mineral Resource (JORC 2012) Jabiluka 300 000mE Nabarlek 24 Mlbs @ 1.84% U₂O (Historical Production) 307 Mlbs UO @ 0.55% U₂O Kakadu National Park • Jabiru Fault hosted (unconformity) uranium mineralisation similar to nearby Jabiluka and Ranger deposits (Ranger-type) Ranger Uranium Mine' 300Mlbs 0.23% U3O8 Deep Yellow Angularli² 32.9Mlbs @ 1.09% U₂O Caramal 25km 350 000mE Arafura Sea Maningrida Road 8 700 000mN 5 8 800 000mN#6S 9700mN The Nabarlek Deposit: Where it is all about the grade!! 9750mN N 80mRL Section 9725mN Pre-mining surface 0.1/1 0.5/12.9 1.7/25 0.7/11 19/1.2 0.6/14.9 1.1/11 1.9/17 0.1/0.8 0.8/9.8 1.5/25 1.6/17.1 0.9/11 0.3/8 00.3/2 1.1/10.4 0.1/1.5 0.4/8.2 2.3/28.1 1.1/26 3.5/11 0.9/16.8 0.4/11.8 4.3/12 1.7/12 1.2/10.3 12.5/7.10 0.2/1.8 2.5/7.7 2.7/15.6 9.6/16 0.9/12.7 0.4/11.7 1.7/12 0.9/9.1 0.1/0.8 0.1/0.3 8.4/12.5 9.4/8.5 11.9/15 0.8/10.2 0.5/11.5 0.3/2.8 O 2.8/17.4 2.4/12 1.2/15.9 3.9/18.8 6.5/13.5 01.5/13.5 8.8/11 13.5/19.2 6.7/17.5 0.2/1 0.9/5.4 14/6.9 0.2/1 16.9/10.21 7.3/1.2 11.4/12.5 0.5/7.6 8.4/13.3 7.6/22.1 0.6/8.4 1.11/15.9 2.6/1.8 0.2/1 0.6/3.4 0.2/0.7 0.4/0.4 0.1/2.3 Cahill Formation % U₂O, x metres 40mRL- Pit outline (mined) 40mRL Cahill Formation NAD87 NAR140 10,100mE NAR200 NAD052 NAD209 1.1%/11 0.6%/14.9 0.3%/8 Six Fault 2.7%/15.6 9.6%/16 13.5%/19.2 6.7%/17.5 NAD028 NAD193 10,140mE NAD120 0.0%/2 0.2%/0.7 1.1%/15.9 0.2%/0.7 North Fault 0.7/1.5 25m Dolerite 1-3 3-30 > 30 % U₂O /metres Legend Downhole Intercepts %U₂Og/metres North Fault Nabarlek Shear 20m Nabarlek Pit (North) Long Section Uranium Mineralisation defined by drilling in northern half of the Nabarlek Pit - now mined out. • Dolerite Small High-Grade Footprint: Significant concentration of Uranium mineralisation mined from the pit Strong Structural Control: Strong control to high-grade uranium mineralisation adjacent to the North Fault Exploration Concepts: Lower grade margins emphasise the importance on uranium bearing structures See ASX: DEV Announcement 9 October 2018. NAD220 NAD003 NAD053 Pit outline (mined) Nabarlek Uranium Mine Section 9725 mN 6 NAD145#7Nabarlek Project Uranium Spot Price US$/lb 150 125 100 Exploration Camp 75 Acquired Nabarlek Fukushima Event 50 25 25 2005 Nabarlek Mine Area Sept 2023: US$73/lb 15 year high Exploration centered on the historical Nabarlek Uranium Mine Well established infrastructure and support network Positive working relationships with traditional owners Exploration activities were building momentum prior to uranium's downturn post 2011 ....numerous uranium occurrences! 2007 2009 2011 2013 2015 2017 2019 2021 2023 Source: TradeTech and www.uranium.info 7#8Nabarlek Project: 2023 Drill Campaign Underway Focus on two uranium faults systems Nabarlek Fault • . • Hosts the historical Nabarlek Mine Recent uranium equivalent (eU3O8) intercepts are at the unconformity north and south of Nabarlek Associated with near fracture hosted uranium in dolerite (Nabarlek South) from 2022 drilling U40 Fault • • Previous high-grade uranium intercepts at U40 Prospect (incl 6.0m @ 7.6% U3Og from 75m) 8 2023 step-out drilling continues to identify high-grade uranium on U40 Fault - open to south U40 Fault interpreted to link up with uranium mineralisation at U42 Prospect 315 000mE Nabarlek North Nabarlek Fault NABARLEK MINE 24Mlbs @ 1.84% U₁₂O (PRODUCED) Gabo Fault Overload 5km GC11 Nabarlek South North Fault North Buffalo Coopers KP 325 000mE U40 U42 RC & Diamond Drill Holes UO ppm (max assays) >1000 500 - 1000 <500 All weather airstrip & camp Excised DevEx Tenure Mining License Kombolgie Sandstone Unconformity Granite Outcrop Basement Geology U40 Fault 8 635 000 mN Drill campaign continues to deliver with strong uranium hits across multiple prospects " 8 8 645 000 mN#9Nabarlek Project: Nabarlek North and South Prospects Exploring the Nabarlek Fault Recent drilling has identified: Shallow eU3O8 intercepts at the unconformity at Nabarlek North incl: 11.2m @ 0.33% eU3Og from 41m Incl 5.2m @ 0.51% eU308 4.6m @ 0.32% eU3O₂ from 47m (RC122) Incl 0.7m @ 0.83% eU3O Significant unconformity uranium mineralisation south of mineralised dolerite incl: 2.0m @ 0.77% U3O8 and 0.6g/t Au from 132m (RC37) Fracture hosted uranium in dolerite (Nabarlek South) from 2022 drilling: 10.1m @ 1.10% U3O8 from 124m 54.6m @ 0.20% U3Og from 77m Follow-up drilling to test both Nabarlek North and Nabarlek South planned over the coming month Nabarlek North 316 000mE RC122 4.6m @ 0.32% eU,O, from 47.1m incl. 0.7m @ 0.83% eU₂O, RC174 11.2m @ 0.33% eU₂O, from 41m incl. 5.2m @ 0.51% eU₂O RC173 21.5m @ 0.11% eU3O₂ from 35.8m incl. 1.3m @ 0.61% eU₂O 00 Mining Lease Oenpelli Dolerite N 1Km D о Nabarlek Mine Nabarlek Fault 24 Mlbs @ 1.84% U30% (PRODUCED) Excised 10.1m @ 1.10% U₂O from 124m 54.6m @ 0.20% U₂O from 77m 00 ° ° 00 North Fault 100000 Nabarlek South ° 320 000mE 2023 RC Drillhole RC & DD Holes Max U₂O, ppm >1000 500 1000 100 500 Oenpelli Dolerite Fault/Structure . <100 8 640 000mN RC37 2m @ 0.77% U3O8 + 0.6g/t Au from 132m Mining Lease Exploration Lease RC 13 5m @ 0.16% U₂O Coopers from 46m Open To East Nabarlek Fault 00 : & Coopers South 637 000mN 8 637 9#10Nabarlek Project: Nabarlek North - significant uranium intercepts Uranium mineralisation at the unconformity between sandstone and underlying Cahill Formation. Strong alteration of host rocks typical of other fault hosted unconformity-type uranium occurrences (incl Jabiluka and Ranger) Appears to be associated with cross fault with follow up drilling (north and south) a priority. 315,800mE Nabarlek North Oblique Section A 2023 Drilling Historical Drilling 315 800mE RC122 4.6m @ 0.32% eU,O, from 47.1m incl. 0.7m @ 0.83% eU₂O, Oblique Section A Preliminary Interpretation of Cross Fault 100m 168 124 123 316 000 mE Anomalous U₂O, on Unconformity incl 2m @430ppm U,O, (NASMR199D) N RC174 11.2m @ 0.33% eU,O, from 41m incl. 5.2m @ 0.51% eU₂O 172 9 RC173 21.5m @0.11% eu,Q, from 35.8m incl. 1.3m @ 0.61% eU₂O, 169 170 171 Fault 119 8 640 200mN 8 640 600mN 8,640,400mE RC173 21.5m @ 0.11% eU₂O, from 35.8m incl. 1.3m @ 0.61% eU₂O Cahill Fm. 50m 108m RC173 RC174 315,900mE Sandstone 100m Unconformity RC174 11.2m @ 0.33% eU₂O, from 41m incl. 5.2m @ 0.51% eU₂O Om 102m RC93 Drill Hole 23NBRC093 eU₂O, ppm >1000 500-1000 eU O, gamma 100-500 <100 Intercepts are reported as down hole intervals as true widths are not known. 10#11Nabarlek Project: U40 Prospect - significant uranium intercepts Exploring the U40 Fault U40 Prospect Spectacular historical uranium with gold intercepts at U40 (December 2010 - just prior to Fukushima in March 2011) incl.: • 6m @ 7.6% U3O8, 0.7g/t Au from 75m (NAR7492); 4.8m @ 1.9% U3O8, 4.5g/t Au from 80.4m (NAR7493) Step-out drilling to the south along the U40 Fault zone continues to identify high-grade uranium (and gold) mineralisation, returning new uranium equivalent (eU308) intercepts of: 8 3.1m @ 1.00% eU3Og from 77.1m (RC 135), incl: 1.4m @ 1.96% eU308 40.7m @ 0.11% eU3Og from 54.9m (RC 132), incl: 0.4m @ 0.53% eU3O8; 0.6m @ 0.42% еU308 8 645 000 mN NAR7520 6m @ 0.3% U₂O₂ from 49m incl. 2m @ 0.7% U₂O RC135 327 000mE 3.1m @ 1.00% eU3O from 77.1m incl. 1.4m @ 1.96% eU₂O RC132 40.7m @ 0.11% eU₂O₂ from 54.9m incl. 2.6m @ 0.35% eU₂O 0.4m @ 0.53% eU₂O 0.6m @ 0.42% eU₂O Subvertical Dolerite Dyke (Drilling ineffective) 5 56 133 137 ૮૯. 136 19 85 U40 Fault Zone' 135 134 92 91 67 71 64 89 لله RC73 327 500mE 24m @ 0.16% U₂O₂ from 61m incl. 6m @ 0.25% U30, 2.71g/t Au incl. 1m @ 0.52% U₂O8 RC65 5.0m @ 0.54% U₂O₂ from 43m incl. 1.0m @ 1.55% U₂O NAR7493 4.8m @ 1.9% U₂O, 4.5g/t Au from 80.4m NAR7492 6m @ 7.6% U₂O8, 0.7g/t Au from 75m 59 RC88 33.0m @ 0.12% U₂O8 from 61m Section 8644750mN 200m 728 3 Section 8644700mN 11#12Cover Nabarlek Project: U40 Prospect - Infill and step out drilling next Dolerite Cahill Fm. 327,100mE U40 Prospect Section 8644750mN 137 136 1.8/0.08 18.4/ 0.05 5.5/0.12 168m 135 U40 Fault Zone 150m 120m 134 327,300mE RC135 3.1m @ 1.00% eU30, from 77.1m incl 1.4m @ 1.96% eU₂O 50m 138m -50m RC49 Drill Hole 23NBRC049 eU₂O ppm >1000 m/% eU₂O₂ eU O, gamma 50m 500 1000 100-500 50-100 Cover Dolerite Cahill Fm. Om 327,100mE 133 30m @0.06% eU₂O incl 0.6m @ 0.35% eU₂O U40 Prospect Section 8644700mN 132 93 92 91 327,300mE 90 RC132 40.7m @ 0.11% eU₂O, from 54.9m incl 2.6m @ 0.35% eU₂O, 0.4m @ 0.53% eU₁₂O, 0.6m @ 0.42% eU₂O 2.6/0.05 102m 102m 102m 3.2/0.12 108m -50m 150m RC49 Drill Hole 23NBRC049 eU₂O₂ ppm >1000 U40 Fault Zone m/% eU,O,* 500-1000 180m eUO, gamma 100-500 50m 50-100 Near surface uranium mineralisation at U40 masked by flat dolerite which requires further infill drilling DevEx successfully targeting significant uranium mineralisation along the U40 Fault south of previous high-grade intercepts • Major expansion to current drill campaign - Infill and Step-out south of these intercepts 12 0m 50m#13Murphy West Uranium Project, NT : Emerging Uranium Project Province-Scale Uranium Exploration • Large ground holding (5,000 km²) located west of the Queensland Westmoreland uranium deposits Same geological host rocks on the NT side, including the prospective Westmoreland Conglomerate Minimal uranium exploration including irregular and patchy airborne radiometric surveys Priority exploration planned in the coming 12 months including: • • Extensive airborne radiometric surveys to identify near surface uranium mineralisation Follow-up field surveys targeting uranium anomalies identified in the survey DevEx has the right to earn 75% in the uranium mineral rights by spending $3.5 million within 5 years Complements DevEx's uranium growth strategy JV Tenure 700 000mE Mineral Resource Estimate ° Uranium Prospect Murphy West Uranium Project Prospective Uranium Corridor 800 000mE Nabarlek Uranium O Project Murphy West Uranium Project NT QLD Westmoreland 51.9 Mlbs @0.09% U₂O,¹ 1 Seigal Volcanics CO Westmoreland Conglomerate 50km Northern Territory GDA94 Zone 53 Basement Queensland 13 8 050 000mN 8 100 000mN#14Kennedy Project: Extensive lonic Clay Rare Earth Elements (REE) in Surface Clays Step-out drilling confirms regional scale REE mineralisation from surface with significant results from drilling including: DevEx Granted DevEx Applications Drilling - 2m @ 1,537ppm TREO from surface (KRAB013) - - - 2m @ 1,734ppm TREO from surface (KRAB016) 4m @ 1,017ppm TREO from surface (KRAB022) 2m @ 1,514ppm TREO from surface (KRAB027) 3m @ 1,008ppm TREO from surface (KRAB031) 2m @ 1,507ppm TREO from surface (KRAB032) 2m @ 1,650ppm TREO from surface (KRAB035) 1.5m @ 1,138ppm TREO from 0.5m (KAC062) 1.5m @1,508ppm TREO from 0.5m (KAC066) Drilling demonstrates higher grade magnet rare earth elements such as Terbium (Tb) and Dysprosium (Dy) in numerous holes 500-1000 Hole Number 2023 Aircore Drilling Maximum TREO (ppm) Assay in Top 4m. • >1000 . 24 42 40 25 41 39 26 150-500 19 27 38 Geology 14 28 Tertiary Clays (Target Regolith) 70 6 Quaternary Drainage plus Clays 5 29 Basement Stratigraphy 30 Granite plus Intrusives 31 11° EPM28009 36 10 35 34 8 9 33 32 DRILLING PLANNED DRILLING PLANNED DRILLING PLANNED 5km 305 000mE Kennedy Project QUEENSLAND 52 53 51 054 55 50 56 57 58 59 60 61 62 63 49 48 48. 47 46 45 67 64 65 44 66 43 8 035 000mN 8 035 000mN 14#15Kennedy Project: Positive Metallurgy Supports Next Stage REO pH 4 0.5hr Av Recovery AMSUL Leach AMSUL Leach AMSUL Leach pH 3 pH 4 24hr¹ 0.5hr Av Recovery Metallurgical test work confirms Ionic Adsorption REE Clays % % Av Recovery % Rapid recoveries by desorption of REES in first 30 minutes using ammonium sulphate (AMSUL) solution in weak acid conditions (pH4) La₂O3 43 47 46 Ce₂03 1 2 4 Prб011 38 45 NdO3 40 48 • Very low acid consumptions SmO3 35 Very low dissolution of cerium (Ce2O3) EuO3 34 Very low dissolution of gangue elements (incl iron, aluminium and calcium) GdO3 36 Tb407 31 4 % + 7 8 49 51 44 46 43 49 44 51 38 47 Dy203 29 37 44 . Further increase in REE recovery by lowering AMSUL leach to pH3 without significant increase in acid Ho₂O3 29 36 43 consumption. Er₂O3 26 33 40 Tm2O3 22 29 32 Yb₂O3 19 26 31 Lu₂O3 20 24 49 Y₂03 37 43 49 Acid Consumption 1 see Company ASX Announcment 16 May 2023 3.3 kg/t 3.9 kg/t 11.5 kg/t 15#16Kennedy Project: Significant up-scale potential - Extensive Drill Target • Drilling underway • Focussed on determining the overall extent of the lonic Adsorption REE Clays over the broader Project area Drilling will provide an understanding of the grade distribution of the high-value rare earth elements including Dy and Tb and guide priority areas for in-fill drilling N 10km Mt Garnet Kennedy Hwy 280 000mE 20km EPM28009 DevEx Granted DevEx Applications 2023 Aircore Drilling Maximum TREO (ppm) Assay in Top 4m >1000 Geology 500 1000 300-5000 Tertiary Clays (Target Regolith) Quaternary Drainage plus Clays Basement Stratigraphy Granite plus Intrusives Drainage EPM28012 320 000mE 8 020 000mN 16#176 660 000mN 6 680 000mN Highway Nickel Project: Nickel sulphide exploration north of Kalgoorlie WESTERN AUSTRALIA Highway Nickel Project Menzies Kalgoorlie PERTH 5km Menzies - Goldfields Highway Rail 320 000mE 330 000mE HIGHWAY NICKEL PROJECT Lake Goongarrie N • Aircore Drilling Saints Nickel Sulphide Deposits Highway Ultramafic • . Earn-In-Agreement to explore for Kambalda-style nickel sulphide mineralisation north of the historical Scotia Nickel Sulphide Mine Located on the nickel sulphide endowed Highway ultramafic, immediately north of the Saints Nickel Deposits 11 kilometres of prospective rocks, currently masked by thin lacustrine clays DevEx plans to carry out SQUID EM technology, to explore for massive nickel sulphides that may lie beneath these thin clays EM conductors will be fast tracked to drilling DevEx has the right to earn up to a 75% interest in all non-gold mineral rights within the Highway Nickel Project by spending up to $3 million within 4 years Kambalda - Menzies Greenstone Belt Scotia Nickel Sulphide Mine (Closed) 17#18Julimar Complex: New ground in a new nickel-copper-PGE region ☐ 6,530,000 mN ☐ ☐ 6,550,000 mN Sovereign Project 10km 420,000 mE Chalice AEM Anomalies DevEx Granted Tenement (100%) Australian Silica Quartz Group Granted Tenement (DevEx Earn-In) Caspin Tenements Chalice Tenements Julimar Complex Sovereign Magnetic Complex Hartog 450,000 mE N Yarawindah Brook Ni-Cu-PGE² Caspin Resources Limited Jansz Sovereign Project Discovery of high-grade palladium and associated nickel- copper-platinum group elements (Ni-Cu-PGE) by Chalice Mining Limited (ASX:CHN) has kicked off an exploration boom in the region Sovereign Project located between the Chalice discovery and the Yarawindah Brook Ni-Cu-PGE Project (Caspin Resources Limited, ASX:CPN) The right rocks - Large 12km-long Sovereign Mafic- Ultramafic Intrusion defined with no previous Ni-Cu-PGE exploration Extensive ground EM surveys over the larger intrusion planned to continue after 2023 harvest season Ground EM conductors will be fast-tracked to drilling Baudin כו 9 Chalice Ni-Cu-PGE Discovery Gonneville¹ Tenement outlines held by Chalice and Caspin are combined for context. 18#19DevEx Next Steps Nabarlek • Two drill rigs now on site (Diamond and RC) • Priority follow-up drilling of recent uranium intercepts at : • U40 and U42 Prospects • Nabarlek North and Nabarlek South Prospects Kennedy • Drilling to test continuity and scale of the clay hosted REE mineralisation Highway • Squid EM to commence in late October Murphy West Uranium Project • Extensive radiometric survey to commence March-April 2024 19#20XDevEx RESOURCES LTD Thank you Contact Details Level 3, 1292 Hay Street West Perth WA 6005, Australia +61 8 6186 9490 +61 8 6186 9495 Investor Relations Read Corporate Nicholas Read +61 8 9388 1474 [email protected] [email protected] www.devexresources.com.au https://twitter.com/DevExResources https://www.linkedin.com/company/devex-resources/ References Nabarlek Project - Slide 5: 1. Production History: McKay, A.D & Miezitis, Y. 2001. Australia's uranium resources, geology and development of deposits. AGSO - Geoscience Australia, Mineral Resource Report 1. ERA Annual Production Reports 2001 to 2018. 2. Mineral Resource: Deep Yellow Limited Mineral Resource Estimate Update for Angularli 3 July 2023. Energy Resources of Australia Ltd (ASX:ERA) Annual Statement of Reserves and Resources January 2018. Murphy West Project - Slide 13: 1. Mineral Resource: Laramide Resources Limited, Westmoreland Uranium Project, National Instrument 43-101 Technical Report - Scoping Study (April 2016) Julimar Complex - Slide 18: 1. Chalice Mining Limited (ASX: CHN) ASX announcement "Tier-1 scale maiden Mineral Resource for Gonneville - 10Moz Pd+Pt+Au (3E), 530kt Ni, 330kt Cu and 53kt Co" on 9 November 2021. 2. Caspin Resources Limited (ASX: CPN) ASX announcement "Primary Sulphide PGE Mineralisation Confirmed at Yarabrook Hill" on 5 July 2021. 3. Harrison P. H., 1984. The mineral potential of layered igneous complexes within the Western Gneiss Terrain. In: Professional papers for 1984 of the Geol Surv of W. A. 19. Gov Printing Office, Perth, pp 37-54. 4. Chalice Gold Mines Limited (ASX:CHN) ASX announcement "Major new 6.5km-long EM anomaly identified at Julimar" on 22 September 2020. 20 20