GATEWAY MINING LIMITED — Investor Presentation 2026

Apr 8, 2026

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Unlocking the next multi million ounce gold system across the Yandal Greenstone Belt

Important Information and Disclaimer Forward Looking Statements ▪ ▪ 2

• This presentation has been prepared by Gateway Mining Ltd (GML). The information contained in this presentation is a professional opinion only and is given in good faith. Certain information in this document has been derived from third parties and through GML has no reason to believe that it is not accurate, reliable or complete, it has not been independently audited or verified by GML.

• This presentation is in summary form and does not purport to be all inclusive or complete. Recipients should conduct their own investigations and perform their own analysis in order to satisfy themselves as to the accuracy and the completeness of the information, statements and opinions contained.

• This is for information purposes only. Neither this nor the information contained in it constitutes an offer, invitation, solicitation or recommendation in relation to the purchase or sale of GML shares in any jurisdiction. This does not constitute investment advice and has been prepared without taking into account the recipient’s investment objectives, financial circumstances or particular needs and the opinions and recommendations in this presentation are not intended to represent recommendations of particular investments to particular persons. Recipients should seek professional advice when deciding if an investment is appropriate. All securities transactions involve risks, which include (among others) the risk of adverse or unanticipated market, financial or political developments.

• To the fullest extent permitted by law, GML, its officers, employees, related bodies corporate, agents and advisors do not make any representations or warranty, express or implied, as to the currency, accuracy, reliability or completeness of any information, statements, opinions, estimated, forecasts or other representations contained in this presentation. No responsibility for any errors or omissions from this arising out of negligence or otherwise is accepted.

• Any forward looking statements included in this document involve subjective judgment and analysis and are subject to uncertainties, risks and contingencies, many of which are outside the control of, and may be unknown to, GML. In particular they speak only as of the date of this document, they assume the success of GML’s strategies, and they are subject to significant regulatory business, competitive and economic uncertainties and risks. Actual events may vary materially from the forward-looking statements and the assumptions on which the forward-looking statements are based. Recipients of this document are cautioned to not place undue reliance on such forward-looking statements.

Important Information

• Nothing in this material should be construed as either an offer to sell or a solicitation of an offer to buy or sell securities.

• Recipients should conduct their own investigations and perform their own analysis in order to satisfy themselves as to the accuracy and the completeness of the information, statements and opinions contained.

• By receiving the Presentation, you acknowledge and represent to the Company that you have read, understood and accepted the terms of this disclaimer. This Presentation is not a prospectus, product disclosure statement or other offering document under Australian law or any other law (and will not be lodged with the Australian Securities and Investments Commission (ASIC) or any other foreign regulator) and is not, and does not constitute, an invitation or offer of securities for subscription, purchase or sale in any jurisdiction. In particular, this Presentation does not constitute an invitation or offer of securities for subscription, purchase or sale in the United States or any other jurisdiction in which such an offer would be illegal. The securities referred to in this Presentation have not been, and will not be, registered under the US Securities Act of 1933 as amended or the securities laws of any state or other jurisdiction of the United States and may not be offered or sold, directly or indirectly in the United States.

• The presentation has been authorised for release by the Executive Chairman of the Company.

Competent Person Statement

• The information in this presentation that relates to Exploration Results and Mineral Resources has been extracted from various GML ASX announcements and are available to view on the GML website at “ ”

• www.gatewaymining.com.au or through the ASX website at www.asx.com.au (using ticker code GML ).

• GML confirms that it is not aware of any new information or data that materially affects the information included in the original market announcementand that all material assumptions and technical parameters underpinning the Mineral Resources in the relevant market announcement continue to apply and have not materially changed. The Company confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.

Highly Successful and Experienced Leadership Team ▪ 3 +15 years experience in formation, financing and development of natural resources companies, including Andrew Bray Strickland Metals Ltd, Silver Mines Ltd, Futura Resources Ltd, amongst others. Executive Chairman

▪ Former Chief Executive Officer of Strickland Metals Ltd (previous owner of Yandal Gold Project).

• +30 years technical, management and financial experience in the resource sector worldwide in project management and executive development roles.

Anthony McClure Non-Exec Director

• Financial sector experiences within mineral and energy sectors.

• Current Chair of Strickland Metals Limited.

• Former director Silver Mines Limited, Bolnisi Gold NL, Nickel Mines Limited, European Gas Limited and Santana Minerals Limited.

• Mining engineer and mechanical engineer with +40-year experience in the mining industry in Australia and Africa.

• ▪ Former roles with Rio Tinto, Macmahon and WMC Resources.

David Morgan Non-Exec Director

• Former General Manager for Equigold and Sundance Resources.

• Previous director of Discovex Resources Limited and Strickland Metals Limited.

• Current Non-Executive Director Nagambie Resources Limited.

▪ Geologist and company director with +40 years.

David Crook Non-Exec Director

• Inaugural Managing Director of Pioneer Resources Limited.

• Current Managing Director of Tyranna Resources Limited.

• 18+ years geology experience for several ASX mineral exploration companies.

• ▪ Former Executive Technical Director Strickland Metals Limited.

Richard Pugh Chief Executive Officer

• Current Non-Executive Director Strickland Metals Limited.

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Corporate Summary 4

CAPITAL STRUCTURE (as at 7 April 2026)	CAPITAL STRUCTURE (as at 7 April 2026)
ASX Ticker	GML
Shares on issue	2,322,814,859
Options on issue1	91,558,083
Performance Rights (12.5c, 17.5c and 25c)	60,750,000
Cash and liquids3	$28.7M
Share Price	$0.067
Market Capitalisation	~$156M

1. 71,558,083 options expiry 15/12/2026 at $0.033 per option and 20,000,000 options expiry 2/10/2028 at $0.10 per option.

Andrew Bray Executive Chairman DIRECTORS & MANAGEMENT	Andrew Bray Executive Chairman DIRECTORS & MANAGEMENT
Andrew Bray
Anthony McClure	Non-Executive Director
David Crook	Non-Executive Director
David Morgan	Non-Executive Director
Richard Pugh	Chief Executive Officer
Kar Chua	Company Secretary

2. Cash balance as at 31 December 2025. Liquids comprises $9.3m in Brightstar Resources Limited Shares.

MAJOR SHAREHOLDERS

Strickland Metals Limited	12.9%
L11 Capital Pty Ltd	9.8%
Top 20	50.3%
Directors(Directly & Indirectly)	10.3%

A busy eight months… ........but we’re only just getting started 5

Completion of Key Mineralised Acquisition of Yandal Trends Identified High Grade Gold Large gold nugget Major Drilling Gold Project from across Yandal Samples at Great haul at Great Programs Emerging Gold New Hummer Great Western STK Project Western Western Commenced System at Mustang Prospect defined drilling underway Mid 19 Aug. 26 Aug. 26 Aug 1 Sep. 3 Sep. 15 Sep. 17 Sep. 24 Sep. 7 Oct. 22 Oct. 19 Dec 22 Jan 9 Feb 26 Mar March Board Restructure Appointment of New Acquisition of $22.5m raising to 11.5km of gold Haflinger Gold New Rubicon Marks New Phase of CEO – Richard Pugh Glenburgh South underpin aggressive prospectivity defined Discovery – 52m @ Prospect defined Yandal Exploration Project exploration programs at Great Western 1.4g/t Au

New Management appointed and deal completed

Project Overview6

• Within 50km of Northern Star’s Yandal Operations Centre.

• 400koz Mineral Resource Estimate.[1]

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1. Refer to Appendix A for further details regarding Yandal Mineral Resource Estimate.

Project Overview 7

▪ 70km of prospective greenstone belt.

• Current resource base spans 3km of strike, >60km remaining largely untested.

• Historic exploration focused purely on central Celia Shear structure.

• Only 26% of historic drilling reaches depths greater than 100m deeming historic exploration efforts ineffective.

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Key Target Areas Priority regional target zones have potential for major discoveries 8

▪ Great Western

▪ Mustang

▪ Dusk ‘til Dawn

Great Western High priority splay corridor with gold anomalism previously untested by drilling 9

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▪ Drilling by previous holder targeted the intrusion itself – no follow up.

• Extremely strong Mo-Bi-Te anomalism remained unexplained.

• Mafic-intermediate contact.

▪ Significant structural complexity – intersection of shear zones; intrusions; NE cross cutting features.

Great Western High priority splay corridor with gold anomalism previously untested by drilling 10

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• GML soil sampling and lag sampling identified key gold trends.[1]

• Follow-up prospecting activities have returned over 1,000 gold nuggets around the margin of the Great Western Intrusion.[2]

• Drilling is underway with the first assays expected in the coming weeks.

• Refer to ASX announcement dated 3 September 2025.

• Refer to ASX announcement dated 17 September 2025.

Great Western Confirmation of significant gold mineralisation 11

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Cautionary Statement:

Visual estimates of mineral abundance should never be considered a proxy or substitute for laboratory analyses where concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding impurities or deleterious physical properties relevant to valuations.

The gold mineralisation reported is in nuggety form. The minerals visually observed is native free gold, however, being nuggets, they have not been assayed to confirm purity and if any other trace elements may be present. The Company notes gold nuggets showing this colour typically have a high gold purity.

The abundance of gold is constrained to the 134 nuggets reported. The nuggets range in size from 1.5 grams to approximately 26.5 grams and have an angular habit. The nuggets were discovered near surface on tenement E69/2765 to a maximum depth of approximately 40cm using metal detecting equipment. The nuggets are not representative of the entire area with approximately 60% of the nuggets confined to an area approximately 200m (north-south) x 100m (east-west) – centered around 265,380mE and 7,133,110mN (Grid MGA94 Zone 51). The remainder of the nuggets were dispersed along the recently defined surface sampling gold anomaly for approximately 1.2 kilometres of strike on tenement E69/2765.

The Company will undertake additional exploration activities to further assess the abundance of gold within the area where the nuggets were discovered, and across the wider Yandal Project. As previously announced, a wider soil sampling program is ongoing, to map this new anomalous gold trend to Horse Well. A trial 2D IP survey line will also be undertaken across the peak gold anomaly defined to date across Great Western. This survey will be completed once the 3D IP survey across Dusk ‘til Dawn has been finalised. Both set of results will be released to the market in due course. Drilling plans will be released to the market after the Company receives and reports these results.

Refer to ASX Announcement dated 17 September 2025 for full details regarding nugget samples. 11

Key Target Areas Priority regional target zones have potential for major discoveries 12

▪ Great Western

▪ Mustang

▪ Dusk ‘til Dawn

Mustang Analogous Horse Well camp identified at Mustang 13

• Multielement geochemistry by GML accurately mapped key lithologies.

▪ Same contact position immediately to the south hosts high grade mineralization across Horse Well.

▪ Historic BOH +0.1g/t Au identified in old RAB and aircore drilling[1] – have now been systematically tested with 50% of assays pending.

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Horse Well Resource
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1. Refer to ASX announcement dated 29 August 2025.

Mustang Large Scale Emerging Gold System 14

• Aircore drilling highlighting an emerging, extensive gold system.

• Multiple areas requiring tighter-spaced follow-up drilling.

• First significant discoveries –

• Haflinger: 52m @ 1.4g/t Au.¹

• Hummer: 16m @ 1.0g/t Au.²

• • Rubicon: 16m @ 1.0g/t Au.³

• Follow-up RC drilling planned once all assays are received.

• Refer to ASX announcement dated 22 January 2026. 2. Refer to ASX announcement dated 9 February 2026. 3. Refer to ASX announcement dated 16 March 2026

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Mustang Large Scale Emerging Gold System 15

▪ Historic drilling deemed ineffective under areas of cover.

▪ Exploration strategy by GML is effectively testing these primary mineralized structures.

• .

• 60km project remaining largely untested

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Key Target Areas Priority regional target zones have potential for major discoveries 16

▪ Great Western

▪ Mustang

▪ Dusk ‘til Dawn

Dusk ‘til Dawn Advanced gold targets – potential for major discovery ▪ Extensive geophysical work has defined key intrusions. 17[1] ▪ Alteration and large Au-Mo-Cu-Bi-Te geochemical trends coincident with intrusive features.

• Very large hydrothermal system.

• RC drilling planned to test extensions to Dusk ‘til Dawn.

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1. Refer to ASX announcement dated 9 September 2025.

Horse Well Mineral Resources 18

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• Horse Well Mineral Resources ▪ Mineral resource estimates have been completed 19

• across Palomino, Warmblood, Bronco and Filly Central.

• All resources are from surface and remain open down dip and plunge.

• Large portions of modelled mineralisation remains ‘unclassified’ and is excluded from MREs:

• Oxide + transition inferred mineral resource of 103k ozs @ 1.8 g/t Au.[1]

• Combined open pit mineralisation of 278k ozs @ 1.9 /t Au at AUD4k it o timisation .[2 ] g ( p p )

Prospect	Tonnes(t)	Au(g/t)	Au(oz)	Cut-off
Palomino Pit	1,963,000	1.84	116,000	0.5
Palomino UG	155,000	2.69	13,500	2.0
Palomino Total	2,118,000	1.90	129,500	-
Warmblood	1,656,000	2.37	126,000	0.5
Filly	581,000	1.15	21,500	0.5
Bronco	324,000	1.38	14,500	0.5
HWGC Subtotal	4,679,000	1.94	291,500	-
Dusk 'til Dawn	3,495,600	1.00	108,900	0.5
Yandal Project Total	8,174,600	1.52	400,400

• [1. 1.9Mt @ 1.8 g/t Au for 108k oz Au Inferred. ]

• [2. 4.52Mt @ 1.9 g/t Au for 278k oz Au Inferred. ]

• [Refer to “Appendix A: Yandal Inferred Mineral Resource Estimates” for further details regarding the ]

• Yandal Mineral Resource.

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Other Projects – Glenburgh South Strategic Acquisition in High Prospective location[1] 20 ▪ Adjacent to Benz Mining Corp’s Glenburgh Project.

• Early signs of similar mineralisation.

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• Repeat fault structure to the south of Glenburgh.

▪ Airborne magnetic survey completed[2] with surface sampling and geological mapping programs planned for Q2 2026.

1. Refer to ASX announcement dated 15 September 2025 for full transaction details.

2. Refer to ASX announcement dated 9 March 2026.

Other Projects – Barrelmaker 21 ▪ 80km of prospective strike within the Gum Creek Greenstone Belt.

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▪ : Historic drill intercepts include[1]

• 22m @ 2.3g/t Au

• 11m @ 4.5g/t Au

▪ Systematic exploration work is ongoing and includes lithogeochemistry of existing drill samples to better understand the controls on existing gold mineralisation.

• First pass drilling programs are scheduled for later this year.

1.Refer to ASX announcement 9 December 2024.

Summary 22

Key Takeaway

• Fully funded explorer with a pipeline of high priority exploration targets.

• Drastically underexplored Tier 1 greenstone belt, that is host to numerous deposits ranging from +1Moz to +10Moz Au.

• Within 50km of Northern Star’s Yandal Operations Centre.

▪ Discovery of three new prospects from the first systematic drill program (with 50% of assays received to date).

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▪ Existing >400koz Mineral Resource Estimate.

Appendix A: Yandal Inferred Mineral Resource Estimates	Appendix A: Yandal Inferred Mineral Resource Estimates	Appendix A: Yandal Inferred Mineral Resource Estimates	Appendix A: Yandal Inferred Mineral Resource Estimates	Appendix A: Yandal Inferred Mineral Resource Estimates
Prospect	Tonnes (t)	Au (g/t)	Au (oz)	Cut-off
Palomino Pit	1,963,000	1.84	116,000	0.5
Palomino UG	155,000	2.69	13,500	2.0
Palomino Total	2,118,000	1.90	129,500	-
Warmblood	1,656,000	2.37	126,000	0.5
Filly	581,000	1.15	21,500	0.5
Bronco	324,000	1.38	14,500	0.5
HWGC Subtotal	4,679,000	1.94	291,500	-
Dusk 'til Dawn	3,495,600	1.00	108,900	0.5
Yandal Project Total	8,174,600	1.52	400,400

Table Notes:

• Mineral Resources are based on JORC Code Definitions as defined by the Australasian Code for Reporting Results, Mineral Resources and Ore Reserves.

• All figures are rounded to reflect appropriate levels of confidence. Apparent differences may occur due to rounding.

• The Mineral Resource Estimate has been estimated using appropriate high-grade cuts, minimum mining widths and dilutions.

• Tonnes rounded to the nearest 1,000t, ounces rounded to the nearest 500oz.

• Refer to ASX announcement dated 2 July 2025 titled “Acquisition of Yandal Gold Project from Strickland Metals Ltd” for further details regarding the MRE.

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Thank You

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Contact Details

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Level 4, 15 Ogilvie Road, Mount Pleasant WA 6153, Australia info@gatewaymining.com.au +61 8 6317 9875 www.gatewaymining.com.au

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