Mr. Terry Coughlan reports

MONGOOSE MINING ANNOUNCES STRATEGIC REFOCUS OF EXPLORATION ACTIVITIES TO NATURAL (GEOLOGIC) HYDROGEN

Mongoose Mining Ltd.'s board of directors has approved a refocusing of the company's primary exploration and evaluation activities from iron-oxide copper-gold mineral systems to the evaluation and confirmation of natural (geologic) hydrogen as a potential subsurface resource within the company's existing Nova Scotia land package.

Strategic rationale

The company's decision reflects the convergence of three principal factors:

1. Asset fundamentals identified through historical work:
   • Mongoose's Nova Scotia properties host geological features that are increasingly recognized as relevant to natural hydrogen systems, including:
     • Iron-rich and redox-active lithologies historically evaluated in the context of IOCG mineralization;
     • Major regional fault and fracture systems capable of facilitating deep gas migration;
     • Structural and stratigraphic settings that have experienced favourable burial histories, which independent studies identify as a key control on hydrogen preservation.
   • These characteristics were documented and partially constrained through historical mapping, geophysics, geochemistry and drilling undertaken during prior mineral exploration campaigns.
2. Asset fundamentals identified through historical work:
   • Rather than representing a departure from prior work, the strategic refocus leverages and reinterprets legacy IOCG data sets through a modern hydrogen system framework. Independent research published over the past several years has demonstrated overlap between environments historically explored for iron-oxide associated mineral systems and geological settings capable of generating, migrating and potentially trapping hydrogen.
   • Management believes that this historical work provides the company with a meaningful technical head start relative to early-stage natural hydrogen projects that lack comparable subsurface data sets.
3. Evolving market and regulatory context:
   • While natural hydrogen remains an emerging resource opportunity globally, recent field results from multiple jurisdictions have shifted industry focus from theoretical existence toward confirmation and appraisal. Concurrently, Nova Scotia and Canada have adopted hydrogen forward energy strategies that, while primarily focused on green hydrogen, contribute to improved regulatory familiarity, infrastructure planning and long-term commercialization optionality for hydrogen-related resources.

Strategic scope and next steps

The approved refocus does not constitute a change in the company's fundamental business. Mongoose remains an exploration-stage resource company operating within the mineral and energy resource markets.

Near-term activities will prioritize:

• Target refinement using existing geological, geophysical and structural data;
• Design of a staged natural hydrogen confirmation program focused on cost-efficient testing;
• Engagement with technical specialists and independent advisers to support evaluation and disclosure.

The company emphasizes that natural hydrogen exploration is inherently speculative and that no subsurface hydrogen accumulation has yet been confirmed on its properties. Any future exploration or testing results will be disclosed in accordance with applicable securities laws and regulatory requirements.

Retention of optionality

Mongoose will retain its existing mineral tenure and historical IOCG data sets. These assets may continue to provide optionality and technical value, particularly where they support or enhance the evaluation of subsurface hydrogen systems.

Qualified oversight and disclosure

The company intends to ensure that all technical disclosure related to exploration activities is prepared and reviewed in accordance with applicable regulatory standards and with appropriate professional oversight.

About Mongoose Mining Ltd.

Mongoose Mining is a Canadian exploration company focused on advancing its portfolio of mineral projects in Canada. The company is committed to responsible exploration practices and to creating value through discovery, technical excellence and strong community partnerships.

We seek Safe Harbor.