Giant Mining Advances Majuba Hill Copper-Silver-Gold Project with RESPEC Engagement

September 17, 2025 — Leads & Copy — Giant Mining Corp. is continuing its engagement with RESPEC Company LLC to incorporate drilling data from its 2024 and 2025 diamond core programs at the Majuba Hill Porphyry Copper-Silver-Gold Project in Pershing County, Nevada, into the Majuba Hill Copper Project 3D Model.

David Greenway, President and CEO of Giant Mining, stated that this engagement is critical for advancing Majuba Hill by refining the geological model and strengthening the project’s potential, providing a clear path for future drilling, metallurgical studies, and the evaluation of new targets.

RESPEC's updated interpretation will incorporate results from drill holes MHB-30 through MHB-36, refining the geometry of breccia bodies, evaluating the impact of new findings, and guiding the Company’s strategy for further drilling and evaluation of new target zones.

Over the next 3 to 5 weeks, RESPEC will integrate recent drilling into the 3D model, improve breccia body geometry, incorporate silver into the exploration model, and evaluate additional target zones.

The updated interpretation aims to provide Giant Mining with a stronger technical foundation and highlight the potential of new target zones, supporting the advancement of Majuba Hill as a key domestic source of copper and silver.

Majuba Hill is located in Nevada, USA, offering infrastructure advantages and showing indications of a potentially large Cu – Ag +/- Au mineralized body with significant expansion potential.

The Company utilizes a QA/QC program and has engaged Gold Standard Media, LLC and Interactive Offers, LLC for marketing and promotional services.

E.L. “Buster” Hunsaker III, CPG 8137, a non-independent consulting geologist is the qualified person who has reviewed the scientific and technical information contained in this new release.

David C. Greenway, President & CEO

Contact: E: info@giantminingcorp.com, P: 1 (236) 788-0643

Source: Giant Mining Corp.