Obonga Project: Diamond Drilling Programme Update

PANTHER METALS PLC

("Panther" or the "Company")

(Incorporated in the Isle of Man with company number 009753V)

11 June 2026

Obonga Project: Diamond Drilling Programme Update

Awkward Conduit Target Hole Complete, Wishbone VMS Prospect Drilling Underway

Panther Metals PLC (LSE: PALM), the exploration company focused on mineral projects in Canada, is pleased to provide an update for the ongoing diamond drilling programme on the Obonga Project, located upon the Obonga Greenstone Belt, Ontario, Canada.

The first drill hole at the Awkward Conduit Target has completed successfully and drilling has now commenced at the Wishbone Prospect, the emerging and highly prospective base metal volcanogenic massive sulphide ("VMS") system.

Awkward Conduit Target

The first drill hole (BR26-AW-P1-1) has successfully completed to plan, attaining a vertical depth of 401m and intersecting the targeted intrusive. The drill core is currently being processed ahead of samples being submitted for laboratory analysis. Further information will be provided in due course.

Wishbone VMS Prospect

Drilling has commenced on the first of a series of planned diamond drill holes at the Wishbone VMS Prospect. Hole BR26-WBP1-1 is a planned 300m deep inclined hole designed to test the VMS mineralisation strike extension approximately 500m to the north of previous wide VMS intersections. At 5pm local time time the hole was at a downhole depth of 68m.

Based on the results of previous studies, Wishbone is interpreted to be a sub-seafloor VMS system. The current drill programme which is informed by the Company's magnetic previous drilling, geophysics survey data and three-dimensional inversion model (Figure 1) is designed to test for the expected temperature related copper and zinc metal depositional zonation.

Further updates will be provided as the work develops.

A video illustrating the results of the Magnetic Survey inversion modelling and the size and morphology of the Wishbone VMS Target and the relationship with highly anomalous copper in lake sediments is available to view on the Panther Metals PLC YouTube channel at https://youtube.com/shorts/POMgfQuSc44?feature=share1

Wishbone VMS Target Background

The current Wishbone 2026 drill programme follows on from the 2025 drone magnetic survey work and the results of the 2022 drill programme to target multiple high priority electromagnetic ("EM") and magnetic geophysical anomalies prospective for volcanogenic massive sulphide ("VMS") hosted copper / base metal mineralisation. Panther's two hole 600m drilling programme in  autumn 2021 had previously confirmed Wishbone as a VMS base metals target and the 2022 drilling sought to follow-up on the massive sulphide and zinc / copper intersections as well as to test further coincident magnetic and electromagnetic conductor geophysical anomalies identified by regional airborne surveys.

Historical drilling in the 1970s intersected massive stringer and disseminated sulphide 800m north of the Wishbone anomaly and drilling by BHP in the 1990s intersected massive stringer and disseminated sulphide 600m south of the anomaly.

BHP ranked the Wishbone anomaly a high priority for follow up in 1992, however no further work was completed prior to 2021. Airborne geophysics datasets compiled since that time have shown that the historical drilling failed to intersect the major anomalies.

Wishbone is situated in a similar geological environment to the nearby Sturgeon Lake VMS mining camp, on the Wabigoon Greenstone Belt, approximately 75km due west.  The Sturgeon Lake VMS Camp is host to five historic zinc-copper-lead-silver producing mines, with a combined total production of: 19.8Mt @ 8.50% Zn, 1.06% Cu, 0.91% Pb & 119.7g/t Ag.

In 2021 Panther's two hole, 600m diamond drilling programme, intercepted multiple lenses of sulphide mineralisation including in drill hole BBR21_WB_001 a 27.3m wide intercept of massive sulphide mineralisation and in hole BBR21_WB_002 51m of sulphide-dominated mineralisation.

Wide massive sulphide and semi-massive sulphide mineralisation intersections were made in both drill holes:

WB001: Three wide sulphide intersections:

-    27.3m of massive sulphide from 106.2m ('Upper layer'), with fault at base;

-    2.5m of massive sulphide from 234.8m ('Mid layer'; and

-    1.4m of massive sulphide from 256.6m ('Lower layer')

WB002:  Wide zoned sulphide intersection:

-    51m from 174m comprising a wide zone of sulphide dominated mineralisation, including:

-    17m from 180m of massive sulphide ('Upper zone') and

-    7m from 218m of semi-massive sulphide ('Lower zone')

In Panther's 2022 drill programme, a further three diamond drill holes intersected further massive and semi-massive sulphides, and a zone of zinc mineralisation:

Hole BBR22 WB-P1-2:    Potentially commercial grades of zinc mineralisation:

-    3.6m @ 3.9% Zn from 120m, including

-    2m @ 6.8% Zn, 4.3 g/t Ag and anomalous 0.19% Cu from 120m, with

-    0.5m @ 11.65% Zn, 4.1 g/t Ag and anomalous 0.14% Cu from 120.2m.

Hole BBR22 WB-P2-1:  Further wide zones of massive and semi-massive sulphide mineralisation intersected, interpreted to be related to the high temperature pyrrhotite dominant core of the VMS system:

-    22.4m of massive and semi-massive sulphide from 127m downhole.

Hole BBR22 WB-P3-1 :

-    3.8m of semi-massive sulphide from 163.2m downhole.

The Wishbone discovery was the first significant VMS-style mineralisation to be made on the entire Obonga Greenstone Belt. Given the geological tendency for VMS systems to cluster and repeat and given the presence of highly anomalous copper in lake and stream sediments nearby (see Figure 4).

An important characteristic of VMS deposits is that they typically display a zonation of metals within the massive sulphide body from Fe+Cu at the base to Zn+Fe±Pb±Ba at the top and margins, related to differing temperature and chemical conditions at mineral deposition. The major observed mineral component of the Wishbone  massive sulphide mineralisation is pyrrhotite with less common pyrite and minor sphalerite and chalcopyrite in distinct zones.

The Wishbone assay result suite, including rare earth element ("REE") analyses, has yielded important geochemical information allowing the classification of the mineralisation, alteration ratios and the development of exploration vectors towards zones of potential economic interest. Wishbone has been classified as a bimodal type deposit, the same type as Canada's Kidd Creek (Ontario) and Noranda (Quebec) VMS deposits.

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Obonga Project - Advancing a High-Impact VMS and Critical Minerals District

Panther Metals' Obonga Project in Ontario continues to demonstrate strong potential as a district-scale exploration opportunity targeting base and critical minerals. Since acquiring the Obonga Greenstone Belt in July 2021, the Company has advanced multiple high-priority targets including Wishbone, Awkward, Survey, Ottertooth, and Silver Rim.

On 9 February 2026 Panther announced plans for an approximately 2,000-metre diamond drilling program at the Wishbone Prospect, following the grant of an Exploration Permit in June 2024 valid through 2027. Previous work confirmed compelling VMS-style mineralisation, including 27.3m of massive sulphide and 51m of sulphide-dominated mineralisation across multiple lenses, supported by high-grade copper anomalies in lake sediments.

In July 2024, Panther secured an Exploration Permit for Awkward West, enabling up to 31 drill holes. Historic drilling returned 27.2m at 2.25% TGC, with zones exceeding 5% TGC, alongside indications of nickel, copper, and platinum group elements, aligning with the Company's critical minerals strategy.

High-resolution magnetic and electromagnetic surveys continue to refine drill targeting across Obonga. Survey and Ottertooth remain highly prospective, hosting multiple untested geophysical anomalies and historic massive sulphide intercepts.

     Winston Project - Tailings Evaluation and MRE Pathway

Panther Metals' Winston Project represents a near-term, development-focused opportunity centred on the evaluation of historic mine tailings and has been the subject of prior technical and commercial assessment involving Extrakt.

Current work is focused on tailings sampling, metallurgical testing, and data validation to define metal content, recoverability, and support the preparation of a Mineral Resource Estimate (MRE). This approach provides a clear value-creation pathway with lower geological risk than greenfield exploration and aligns with modern reprocessing and critical mineral's themes.

Dotted Lake Project - Hemlo-Adjacent Polymetallic Opportunity

Panther Metals' Dotted Lake Project, acquired in July 2020, is located approximately 16km from Barrick Gold's Hemlo Mine, within a well-established mining region.

Early exploration identified multiple gold and base metal anomalies, with initial drilling confirming gold mineralisation. In early 2025, follow-up drilling materially advanced the project, confirming nickel and magnesium mineralisation within an ultramafic intrusion and identifying a VMS-style system, significantly expanding the project's polymetallic potential.

The program refined structural controls, extended mineralisation, and identified multiple new drill targets, positioning Dotted Lake as a high-upside, multi-commodity exploration asset.

     Commercial Strategy - Focused Value Creation

Panther Metals is focused on disciplined, discovery-driven value creation through efficient capital deployment and technical execution. With Obonga delivering high-impact exploration, Winston providing a resource-focused development pathway, and Dotted Lake offering polymetallic upside, the Company maintains a balanced portfolio aligned with favourable commodity market conditions.

The Company's strategy is to advance high-quality assets along the most efficient technical pathway, delivering tangible milestones that underpin long-term shareholder value.