Wallbridge Mining Company Limited (TSX: WM) (OTCQB:WLBMF) is pleased to announce the results for the first two holes completed as part of its 2026 Phase 1 drilling campaign at its 100% owned Martiniere gold project. The Phase 1 campaign is focused on the Dragonfly zone which forms the core of the Bug Lake deformation corridor and hosts the majority of the Martiniere mineral resource.

HIGHLIGHTS*

“The initial results from our 2026 program once again provide further confirmation of the scale potential emerging at Martiniere,” commented Brian Penny, Chief Executive Officer of Wallbridge. “Drilling along the Dragonfly corridor continues to intersect multiple mineralized structures over significant widths, reinforcing our geological model of Martiniere as a large and robust gold system that remains open for continued expansion both laterally and at depth. We look forward to continuing to unlock the potential at Martiniere over the remainder of the program and will report results as they become available.”

Martiniere 2026 Drilling Program

On March 16, 2026, the Company announced the commencement of a 17,000 metre exploration drilling program at Martiniere. The program is being executed in two phases, with Phase 1 currently nearing its scheduled completion on May 14, 2026. Phase 1 com prises six holes totaling approximately 4,000 metres.

The primary objective of the 2026 program is to further evaluate Martiniere’s growth potential through widely spaced step-out drilling targeting the projected extensions of the principal structures controlling gold mineralization beyond the limits of the currently defined mineral resource.

The six Phase 1 holes were drilled along an approximate 350 metre section of the Dragonfly shear corridor. Summary descriptions of the results for the first two holes reported here are provided below. Results for the remaining four holes will be reported once all final assays have been received.

• MR-26-141 (Section A-A’): Collared approximately 250 metres south of the underground mineral resource and designed to test the down-dip projection of the system, excessive down-hole deviation early in the original hole MR-26-141 resulted in the hole being abandoned and re-collared as MR-26-141A, which was successfully completed. Prior to abandonment, hole MR-26-141 intersected a 2.8 metre shear-hosted interval grading 2.2 g/t Au at a down-hole depth of 68.5 metres.
• MR-26-141A (Section A-A’): Collared within a few metres of abandoned hole MR-26-141, hole MR-26-141A intersected several narrow mineralized intervals, including 5.22 g/t Au over 1.3 metres along the sheared contact between a felsic porphyry dike and a pillowed basalt unit. Additional lower grade gold mineralization was intersected along the sheared margins of multiple porphyry dikes emplaced along the Dragonfly shear corridor.
• MR-26-142 (Section B-B’): Collared along the eastern margin of the Bug Lake South resource area and drilled northward to test a gap between previously-completed drill holes along the Dragonfly corridor. The hole intersected a series of sub-parallel mineralized structures, returning intervals including 2.01 g/t Au over 12.8 metres, 3.11 g/t Au over 18.4 metres, 3.75 g/t Au over 4.8 metres, 4.53 g/t Au over 13.5 metres, and 3.84 g/t Au over 3.0 metres.

The majority of the defined resource area at Martiniere is hosted along the Bug Lake deformation corridor, a broad structural corridor comprising a series of northwest-striking, southwest-dipping shear zones spatially associated with felsic intrusive dikes developed within a large drag-fold structure adjacent to the regional-scale Lac du Doigt fault. The Lac du Doigt fault is interpreted to represent an important structural control on the emplacement and distribution of gold mineralization at Martiniere and currently marks the northern limi t of systematic exploration drilling completed to date.

Similar to other major structural corridors in the Abitibi greenstone belt, including the Sunday Lake Deformation Zone that extends across the Company’s approximately 600 km² Detour–Fenelon property and hosts the Detour Lake Mine approximately 45 kilometres west of Martiniere, the Lac du Doigt fault is interpreted to have acted as a deep-seated conduit for hydrothermal fluid flow and gold mineralization.

Since early 2025, exploration drilling targeting the geologic continuity of the broader mineralized system has intersected significant gold mineralization over an area measuring approximately 2,000 metres along strike, by 800 metres in width, and to a vertical depth of at least 800 metres below surface. The system remains open to continued expansion laterally to the southeast and north, as well as at depth.

The Martiniere mineral resource (published Ma rch 27, 2025) is estimated to contain 346,000 ounces of gold averaging 2.29 g/t Au in the Indicated category and 387,000 ounces of gold averaging 3.11 g/t Au in the Inferred category. The mineral resource estimate includes all drilling completed prior to December 31, 2024. (For details see the current mineral resource statement provided in the NI43-101 Technical Report dated March 27, 2025 available on the Company’s website at www.wallbridgemining.com and on www.sedarplus.ca).

Gold mineralization at Martiniere is primarily hosted wi thin mafic volcanic rocks and younger felsic porphyry dikes, occurring within discrete shear and breccia zones characterized by pyritic silica flooding, quartz-carbonate veining, and silica-sericite alteration. Mineralization is commonly concentrated along sheared intrusive contacts and within zones of increased deformation throughout the broader Bug Lake deformation corridor.

A table of gold assay highlights is provided below:

For more information, please refer to the links below for a drill hole location map, representative cross sections, and assay summaries of complete drill holes.

Martiniere Gold Project: 2026 Phase 1 Drill Hole Location Map Plan View

Martiniere Gold Project: 2026 Phase 1 Longitudinal Section A-A’

Martiniere Gold Project: 2026 Phase 1 Cross Section B-B’

Martiniere Gold Project: 2026 Phase 1 Drill Assay Summary and Drill Hole Location Information

The Martiniere project is a key component of the Company’s ~600 km² Detour-Fenelon Gold Trend property, Northern Abitibi, Quebec. Martiniere is located 30 kilometres west of the Company’s flagship Fenelon gold project and 45 kilometres east of Agnico Eagle’s Detour Lake gold mine, currently Canada’s largest producing gold mine.

Wallbridge Mining Detour – Fenelon Gold Trend Properties

Quality Assurance / Quality Control

Wallbridge maintains a Quality Assurance/Quality Control program for all its exploration projects using industry best practices. Key elements of the QA/QC program include verifiable chain of custody for samples, regular insertion of blanks and certified reference materials, and completion of secondary check analyses performed at a separate independent accredited laboratory. Drill core is halved, sampled, and shipped in sealed bags to Activation Laboratories Ltd. in Val d’Or, Quebec, where samples are routinely analysed via fire assay with atomic absorption spectroscopy finish methods. For greater precision and accuracy, samples assaying 10 g/t Au or greater are re-distributed to other ActLabs facilities where t hey are re-assayed via metallic screen fire assay or fire assay/gravimetric finish, depending on the amount of sample material remaining available. Samples containing visible gold are routinely submitted directly for analysis by metallic screen fire assay method. Activation Laboratories Ltd. operates under a Quality Management System that conforms to the requirements of ISO/IEC 17025.

Qualified Person

The Qualified Person responsible for the technical content of this news release is Mr. Mark A. Petersen M.Sc., P.Geo. (OGQ AS-10796; PGO 3069), Senior Exploration Consultant for Wallbridge.

About Wallbridge Mining

Wallbridge is focused on creating value through the exploration and sustainable development of gold projects in Quebec’s Abitibi region while respecting the environment and communities where it operates. The Company holds a contiguous mineral pro perty position totaling 598 square kilometres that extends approximately 82 kilometres along the Detour-Fenelon gold trend. The land position is host to the Company’s flagship PEA stage Fenelon Gold Project, and its earlier exploration stage Martiniere Gold Project, as well as numerous greenfield gold projects.