Talisman Metals PLC

("Talisman" or the "Company")

Positive Stream Sediment Sampling Results Identify Multiple Priority Targets at Fougnar, Morocco

Dublin, Ireland - Talisman Metals PLC ("Talisman" or the "Company") reports the results of its recently completed stream sediment sampling program (see press release 24 February 2026) at the Company's Fougnar licenses ("Fougnar Project"), which are 25km west of the Tizert copper-silver mine, see Figure 1.

The stream sediment work, in combination with historical field work and mapping, confirms the priority of established drill targets (see press release of 16 April 2026). Additionally, a previously unknown area of potential mineralisation has been discovered and will be added to the anticipated drill program scheduled for the summer 2026, see Figure 2.  Talisman believes that the sediment rock formations at Fougnar have excellent potential to host a large sediment-hosted copper-silver deposit, similar to other such deposits in the Anti-Atlas area of central Morocco.

Tim McCutcheon, Talisman's CEO stated, "The main work focus at the Fougnar Project to date has been on the northern section, due to outcropping mineralisation. However, significantly copper-anomalous samples were collected on the southern part of the Fougnar Project over a 1km long interval. We now have expanded the target zone to an even larger area to drill."

Highlights

·    A total of 132 stream sediment samples were collected across the Fougnar Project;

·    Multiple anomalous catchments were identified, with assay results of up to:

200 ppm Cu (Copper), 6,510 ppm Ba (Barium), 502 ppm Pb (Lead), 161 ppm Zn (Zinc)

·    Newly identified target corridors extend over approximately 4 km across six distinct target areas (see Figure 2), in addition to the existing 2.5 km mineralised trend identified along strike;

·    Historical trenching areas containing known mineralisation were successfully confirmed by stream sediment sampling and used as orientation areas to establish threshold values for copper geochemical anomalies;

·    Several geochemical anomalies are spatially associated with mapped structural features identified in the field and interpreted from ground TEM surveys and favourable lithological units within the basal series stratigraphy (see Figure 2).

Methodology and QAQC

Stream sediment samples were collected from fine sediment traps within active drainage channels over intervals of approximately 20-30 m along stream courses, while avoiding areas affected by anthropogenic contamination or stream disturbance (including terraces). Sample locations were recorded using handheld GPS devices.

Samples were dried and sieved to <63 μm (one millionth of a meter) prior to analysis. A total of 23 QA/QC samples were inserted into the sample stream, comprising approximately 5% blanks, 5% field duplicates, and 5% certified reference materials ("CRMs").

Samples were submitted to the ONHYM laboratory in Rabat, Morocco for multi-element analysis using a three-acid digestion (HCl-HNO₃-HF) with ICP-AES finish. The analytical method has a lower detection limit of 5 ppm for copper (Cu) and 1 ppm for silver (Ag).

Blank samples showed no evidence of contamination above three times the detection limit for Cu or Ag. Field duplicates demonstrated excellent repeatability, with an R² value of 0.99. Certified reference materials consistently returned copper values approximately 10-20% below certified values, and the Company is reviewing the potential analytical bias; however, the Company does not currently consider this issue to materially impact the interpretation of the results.

Follow-up work programmes underway including:

·    Detailed geological mapping and rock-chip sampling;

·    Trenching across priority target areas;

·    Follow-up drilling of any significant trench results to test mineralisation at depth and along strike.

Figure 1: Project Location Map

Figure 2: Stream Sediment Results Map (left) and Fougnar geology and target generation update (right)

End

For further information:

Talisman Metals PLC

Tim McCutcheon (Chief Executive Officer and Director)

Tel +353 (0) 1 525 6710

[email protected]

Beaumont Cornish Limited (Nominated Adviser)

James Biddle / Roland Cornish

Tel: +44 (0) 207 628 3396

CMC Markets UK Plc (Broker)

Thomas Smith / Thomas Curran

Tel: +44 (0) 20 3003 8255

BlytheRay (Financial PR)
Megan Ray / Said Izagaren
Tel: +44 (0) 20 7138 3204
[email protected]

JORC Code (2012) - Historical Exploration Results Disclaimer

The information in this announcement that relates to historical reported exploration results is based on, and fairly represents, information and supporting documentation prepared by previous operators and/or extracted from historical reports.

The historical exploration results referred to in this announcement were reported prior to the introduction of the JORC Code (2012) and have not been reported in accordance with the JORC Code (2012).

A Competent Person has not done sufficient work to disclose the historical exploration results in accordance with the JORC Code (2012). It is possible that following further evaluation and/or exploration work, the accuracy and reliability of the historical exploration results may not be confirmed.

The Company has not independently verified the historical exploration results, and no assurance can be given that future exploration work will result in the confirmation or upgrade of the historical results to JORC Code (2012) compliant Mineral Resources or Ore Reserves.

The Company considers the historical exploration results to be relevant as they provide an indication of the potential of the project. However, the information should not be relied upon as a representation of the current mineral resource or exploration potential.

Nominated Adviser Statement

Beaumont Cornish Limited ("Beaumont Cornish"), is the Company's Nominated Adviser and is authorised and regulated in the United Kingdom by the Financial Conduct Authority. Beaumont Cornish's responsibilities as the Company's Nominated Adviser, including a responsibility to advise and guide the Company on its responsibilities under the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed solely to the London Stock Exchange. Beaumont Cornish is not acting for and will not be responsible to any other person for providing the protections afforded to customers of Beaumont Cornish nor for advising them in relation to the transaction and arrangements described in the announcement or any matter referred to in it.

Qualified Person

The technical disclosure in this news release has been approved by Fabien Linares, MSc, MAusIMM, a Qualified Person as defined in JORC 2012. The scientific and technical information summarized in this disclosure and related to historic exploration was reviewed by Mr. Linares and he has visited the Project area. Mr. Linares is Head Geologist of Talisman Metals PLC and has sufficient experience that is relevant to the commodity, style of mineralisation or type of deposit under consideration and activity which he is undertaking to qualify as a Competent Person under the JORC code (2012 Edition).

Technical Glossary