THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (596/2014/EU) AS THE SAME HAS BEEN RETAINED IN UK LAW AS AMENDED BY THE MARKET ABUSE (AMENDMENT) (EU EXIT) REGULATIONS (SI 2019/310). UPON THE PUBLICATION OF THIS ANNOUNCEMENT, THIS INSIDE INFORMATION IS NOW CONSIDERED TO BE IN THE PUBLIC DOMAIN.

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION

Trading Symbols

AIM: UFO

FWB: I3A1

8 April 2026

Alien Metals Limited

("Alien" or the "Company")

Munni Munni Historic Data Reveals Material Upside Potential

Alien Metals Limited (AIM: UFO), a minerals exploration and development company, is pleased to advise that its joint venture partner, GreenTech Metals Limited (ASX: GRE) ("GreenTech"), has announced an update on exploration activities at the Munni Munni Platinum-Palladium-Copper-Nickel Project in the West Pilbara region of Western Australia.

Highlights

·    GreenTech has identified material upside potential not captured in the historic Mineral Resource Estimate (MRE) of 24Mt @ 2.9 g/t PGE₄ for 2.2Moz

·    Identification of high-grade PGE zones (>4 g/t PGE₄) and under-recognised Cu + Ni mineralisation

·    Eastern zones with shallow plunge from surface suggest potential for open-cut mining

·    Key findings support an expanded re-estimation of the historic MRE1 and reporting in accordance with JORC (2012)

·    GreenTech's maiden drilling and resampling programme concluded in March 2026 with results expected in mid-April 2026

The full text of the announcement issued by GreenTech Metals is provided below in Appendix A.

For further information, please visit the Company's website at www.alienmetals.uk or contact:

Alien Metals Limited

Bruce Garlick

Email: ir@alienmetals.uk

Strand Hanson (Financial and Nominated Adviser)

James Harris / James Dance / Edward Foulkes

Tel: +44 (0) 207 409 3494

Zeus Capital Limited (Joint Broker)

Harry Ansell / Katy Mitchell Tel +44 (0) 203 829 5000

Turner Pope (Joint Broker)

Andy Thacker / Guy McDougall

Tel: +44 (0) 203 657 0050

Yellow Jersey (Financial PR)

Charles Goodwin / Shivantha Thambirajah

Tel: +44 (0) 203 004 9512

Notes to Editors

Alien Metals Ltd is a mining exploration and development company listed on the AIM market of the London Stock Exchange (AIM: UFO). The Company follows a balanced strategy of advancing and strengthening its asset portfolio through targeted technical work and project development, while evaluating partnerships, joint ventures, and selective monetisation opportunities that are value-enhancing for shareholders. At the same time, Alien will continue to consider opportunities to expand our asset base through carefully selected acquisition opportunities which meet the Board's prudent criteria.

Alien's principal focus is the advancement and development of its 90%-owned Hancock Iron Ore Project in the central Pilbara region of Western Australia. The Hancock tenements contain a JORC-compliant resource of 8.4Mt at 60% Fe and offer significant exploration upside, which is targeted to deliver a mining operation of 2Mtpa for 10 years. The Project benefits from direct access to the Great Northern Highway, providing a route to export facilities at Port Hedland, one of the world's largest iron ore export hubs. Alien also holds exploration interests in the Brockman and Vivash iron ore projects in the West Pilbara.

Alien additionally retains exposure to two advanced precious and base metal assets in the Pilbara. At Munni Munni, one of Australia's largest PGM systems hosting a historic resource of 2.2Moz PGM (Palladium, Platinum, and Rhodium) and gold, the Company has completed its partial asset sale and joint venture transaction with GreenTech Metals Ltd, under which Alien has divested a 70% interest in the Munni Munni tenements to GreenTech and Alien will retain a 30% interest, free carried to the completion of a bankable feasibility study at Munni Munni. Alien (via wholly owned subsidiary A.C.N. 643 478 371 Pty Ltd) also retains a 30% interest in the Elizabeth Hill Silver Project through a joint venture with Crest, which encompasses the Elizabeth Hill Mining Lease M47/342, which has produced some of Australia's highest-grade silver ore during the late 1990s.

Competent Person's Statement

The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled or reviewed by Mr Thomas Reddicliffe, a Competent Person who is a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Reddicliffe is a Technical Director of GreenTech Metals Ltd.

Mr Reddicliffe has sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves', and a Specialist under the 2015 Edition of the 'Australasian Code for Public Reporting of technical assessments and valuations of mineral assets'.

Mr Reddicliffe consents to the inclusion in the report of the matters based on his information and in the form and context in which it appears.

Appendix A - ASX: GRE ANNOUNCEMENT

Munni Munni Historic Data Reveals Material Upside Potential

Highlights

·    Ongoing review of historical Munni Munni data, comprising core and logs for 396 drill holes, has identified material upside potential not captured in the historic Mineral Resource Estimate (MRE)^[1], including:

·    High-grade PGE zones

·    Under-recognised Cu + Ni mineralisation

·    Eastern zones with shallow plunge from surface.

·    Key findings support an expanded re-estimation of the historic MRE1 and reporting in accordance with JORC (2012).

·    GreenTech's maiden drilling and resampling programme concluded in March 2026 with results expected in mid-April.

·    Resampling programme of the well-preserved historic Munni Munni drill core expanded to target high-grade extensions of Ferguson Reef.

GreenTech Metals Ltd (ASX: GRE) (GreenTech) is pleased to provide an update on exploration activities at the Munni Munni PGE-Cu-Ni Project (Munni Munni) located adjacent to the Company's advanced Whundo Cu-Zn-Au Project in the West Pilbara region of Western Australia. The Munni Munni acquisition was completed on 2 February 2026^[2], and GreenTech's maiden drilling and resampling programme concluded in March 2026^[3].

This release includes analysis and interpretation of historical drilling results across Munni Munni. Detailed historical drill hole information and the relevant JORC Table 1 disclosures are included in the appendices of this release.

Chief Executive Officer, James Rattenbury, commented:

"Our ongoing interrogation of the historic database and drill logs has reinforced our conviction that historic exploration efforts, focused almost exclusively on the Ferguson Reef, have missed a compelling larger scale opportunity at Munni Munni.

"Our review to date highlights the potential for both repeats of PGE reef horizons within the Munni Munni intrusive and higher tenor Cu + Ni sulphide, including shallow zones, indicative of magmatic sulphide processes.

With assay results from our maiden programme due shortly, we look forward to validating historic data to support a re-estimated MRE, and designing an expanded exploration programme targeting the wider potential of this 225km² intrusive system using a multi-element geochemical suite that helps identify controlling factors on mineralisation."

Figure 1: Map of Northern extent of Munni Munni intrusive and Ferguson Reef ^{[4], [5]}

Historical Data Review

GreenTech's ongoing systematic review of the historical Munni Munni database, comprising 328 drill holes, and detailed interrogation of drill logs has identified material upside not captured in the historic Mineral Resource Estimate (MRE) of 24Mt @ 2.9g/t PGE4^[6] for 2.2Moz (HLX, 2002)^{1, [7]}.

Cautionary Statement- The estimates are historical estimates and are not reported in accordance with the JORC Code (2012); a competent person has not done sufficient work to classify the historical estimates as mineral resources or ore reserves in accordance with the JORC Code (2012); and it is uncertain that following evaluation and/or further exploration work that the historical estimates will be able to be reported as mineral resources or ore reserves in accordance with the JORC Code (2012).

Key findings of this work include:.

·    High-grade PGE zones identified: Multiple Ferguson Reef zones of +4g/t PGE4⁴ have been identified in the historical data, with design of upcoming exploration programmes to include infill and extensional drilling targeting the areas with potential for reef thickening.

·    Cu + Ni mineralisation under-recognised: Drill core inspection and drill log interrogation confirms that Cu + Ni mineralisation presents outside of PGE Reef zones. The historic MRE3 only includes Cu + Ni within high-grade PGE reef domains (using a 1.9g/t PGE4 cut-off3), with limited assaying of sulphide zones above and below the reef horizon.

·    Eastern zones with shallow plunge from surface: Review of drill logs in the shallow Eastern zones indicates Cu + Ni sulphide mineralisation is not constrained to the PGE Reef and is sitting in the gabbro hanging-wall units (including from surface), suggesting mineralisation will potentially be amenable to bulk open-cut mining

Figure 2: Section through central zone of Ferguson Reef including analysis from historic drill holes ^[8]

Expanded Resampling Programme

GreenTech's resampling programme, undertaken for validation of the historic MRE¹, has demonstrated the potential upside of Munni Munni beyond the Ferguson Reef. To date, only 16 of the 162 historic diamond drill holes have been re-sampled as part of the Phase 1 programme now complete. As drill core has been extremely well preserved, future exploration work programmes at Munni Munni will include further resampling in addition to drilling to target high-grade extensions of mineralisation of the Ferguson Reef

Figure 3 - Section through Eastern zone of Ferguson Reef - historic drill holes ^[9]

Figure 4 - Section highlighting Cu + Ni mineralisation outside of Ferguson Reef - historic drill holes^[10]

These findings support an expanded re-estimation of the historic MRE3 following validation of historical information through the QA/QC programme required for JORC (2012) reporting. Assay results for the completed drilling and resampling programme are expected to be reported in mid-April 2026.

This announcement has been authorised for release by the Board of GreenTech Metals Limited.

For further information, please contact:

James Rattenbury                                                                           Jason Mack

Chief Executive Officer                                                                  Investor Relations

GreenTech Metals Limited                                                             White Noise Communications

info@greentechmetals.com.au                                                        jason@whitenoisecomms.com

Appendix A - Important Notices

Forward Looking Statements

Statements in this announcement which are not statements of historical facts, including but not limited to those relating to the proposed transaction, are forward-looking statements. These statements instead represent management's current expectations, estimates and projections regarding future events. Although management believes the expectations reflected in such forward-looking statements are reasonable, forward-looking statements are based on the opinions, assumptions and estimates of management at the date the statements are made and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. Accordingly, investors are cautioned not to place undue reliance on such statements.

Competent Person Statement

The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information reviewed by Mr Thomas Reddicliffe, a Competent Person who is a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Reddicliffe is a Non-Executive Director and Technical Consultant to GreenTech Metals Ltd. Mr Reddicliffe has sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves', and a Specialist under the 2015 Edition of the 'Australasian Code for Public Reporting of technical assessments and valuations of mineral assets'. Mr Reddicliffe consents to the inclusion in the report of the matters based on his information and in the form and context in which it appears in this announcement.

Cautionary Statement - Historical Exploration Results

The historical results presented in this release include exploration results collected between approximately 1985-2021.

While drilling and assay QA/QC procedures generally match industry standard at the time the work was done, they are not consistent with current industry practice required to meet the 2012 JORC code for reporting of exploration results. As such these results are stated here to provide an indication of the exploration potential of the Munni Munni project tenements.

The estimates of the quantity and grade of mineralisation for the Munni Munni project tenements referred to in this announcement are "historical estimates" within the meaning of the ASX listing rules and are not reported in accordance with the JORC Code 2012.

GreenTech notes that a competent person has not done sufficient work to disclose the corresponding exploration results in accordance with the JORC Code 2012; it is uncertain that following evaluation and further exploration work that the historical estimates will be able to be reported as mineral resources in accordance with the JORC Code 2012; it is possible that following further evaluation and/or exploration work that the confidence in the prior reported exploration results may be reduced when reported under the JORC Code 2012; that nothing has come to the attention of GreenTech that questions the accuracy or reliability of the former owner's exploration results, but GreenTech is in the process of independently validating the previous owner's exploration results and therefore is not to be regarded as reporting, adopting or endorsing those results.

GreenTech will continue to review and validate the data to enable the results to be reported in accordance with the JORC Code 2012.

The levels of PGE (3E), Copper, Nickel reported from past activities, are a key factor in guiding GreenTech's exploration strategy. The previous activity, which produced these results, involved multiple rounds of drilling.

The results are considered to have been generated from work programs representing usual industry practice for the time they were collected and analysed at commercial laboratories which service the mineral exploration industry. In the professional opinion of the Competent Person, GreenTech has, however, done sufficient verification of the data, to provide sufficient confidence that drilling and assays were performed to adequate industry standards and is fit for the purpose of planning exploration programs and generating targets for further investigation.

The Competent Person named in this announcement has confirmed that the information in this announcement is an accurate representation of available data.

Appendix B

 Table A: Drill Hole Details

Table B: Selected Sampled Drill Intersections Relevant to Drill Section Illustrations[11]