Mr. Peeyush Varshney reports

GREAT PLAINS METALS COMPLETES THE FIRST STAGE OF THE FARM-IN AT YEOVAL GOODRICH

Great Plains Metals Corp. has completed the expenditure and drilling requirements to achieve a 51-per-cent interest in the Yeoval Goodrich project.

Highlights:

• Great Plains Metals completes Stage 1 to earn 51 per cent of the Yeoval Goodrich project;
• Summary of exploration activities during Stage 1;
• Yeoval Goodrich project overview.

Completion of Stage 1 to achieve a 51-per-cent project interest

The company signed an earn-in and joint venture agreement with Australian Securities Exchange-listed Godolphin Resources Ltd. on 4 June, 2025. Under the terms of the agreement, Great Plains Metals had the right to earn a 51-per-cent interest by incurring $1-million (Australian) in exploration expenditure. Additionally, the company was required to complete a minimum of 500 metres of reverse circulation and/or diamond drilling. Great Plains Metals has provided Godolphin with a satisfaction notice that the Stage 1 earn-in commitments have been met.

Furthermore, the company has provided notice to Godolphin that it elects to progress to Stage 2 of the agreement. Under the terms of Stage 2, Great Plains Metals must incur a further $1-million (Australian) in exploration expenditure over the next 12 months and complete a minimum of 500 metres of reverse circulation and/or diamond drilling to increase its interest to 70 per cent.

The company completed a private placement in the amount of $4.18-million in February, 2026, to ensure it was financed to progress the project through the next phase.

The alternative path to Stage 2 is if Godolphin informs the company within 20 business days from the date the notice was given that it prefers to form a 51-per-cent/49-per-cent joint venture (in favour of Great Plains Metals) and will then be responsible for 49 per cent of the future expenditure.

Summary of exploration activities during Stage 1

The recent air-core program covered 2,065 metres of shallow air core drilling around the former Goodrich mine and Mount Rose. This has successfully advanced geological understanding at the Goodrich and Mount Rose targets.

Importantly, the historical Goodrich mine and the newly recognized pencil porphyry at Mount Rose appear to represent focal points within a widespread hydrothermal system and strengthen the case that a previously unrecognized porphyry copper-gold system could be present at Yeoval Goodrich.

A local contractor commenced diamond drilling at Goodrich in May with an initial program of up to 2,000 metres. Four diamond drill holes for a total of just over 1,000 metres have now been completed, which concludes phase 1 of the drill program. Great Plains Metals will provide further updates upon receiving assay results from the laboratory.

Yeoval Goodrich project overview

The project consists of two tenements, EL 8538 and EL 9243.

The Yeoval project is located approximately 70 kilometres northwest of Orange in central New South Wales and sits within the geological setting of the Macquarie Arc. The tenements cover an area of approximately 290 square kilometres. The area is underlain by granites, granodiorites and volcanics, and more than 60 historic mine workings occur within the project. The project area is readily accessible by sealed and unsealed roads and is adjacent to railway infrastructure.

The Goodrich mine is a historic copper gold mine and was mined between 1868 and 1912.

Mount Rose is located approximately two kilometres south from the Goodrich mine and limited mining occurred during 1886.

The many gold-copper showings in the Yeoval district have been explored almost continuously since the 1960s, though mostly at shallow levels only, including completing both reverse circulation (RC) and diamond drill holes. Most of this exploration was carried out prior to the Discovery 2000 airborne magnetics and radiometrics becoming available for parts of the Lachlan fold belt, including the Yeoval district.

Copper, gold and other base metal mineralization is widespread in the region and the main mineralization styles include porphyry-style gold-copper mineralization.

Peeyush Varshney, chief executive officer, commented: "Completing the first stage of our earn-in agreement marks a pivotal milestone for GPS at Yeoval Goodrich. We are increasingly confident that a previously unrecognized porphyry copper-gold system may be hosted here.

"With phase 1 of the drill program having been completed, we eagerly look forward to the assay results and additional geological modelling with a view to further advance the project."

About Great Plains Metals Corp

Great Plains Metals is an emerging Australia-focused copper-gold explorer. The strategy of Great Plains Metals is to focus on drill-ready projects with a rapid discovery model in highly prospective geological addresses. The company has a portfolio that consists of Yeoval Goodrich, located in the Lachlan fold belt; the Everton project in Victoria; and an IOCG (iron oxide copper-gold) project in South Australia.

Qualified person

The scientific and technical data contained in this news release have been reviewed and approved by Douglas Kirwin, who serves as the qualified person under the definition of National Instrument 43-101.

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