Greatland Resources Regulatory News (GGP)

Greatland Resources Limited

E: info@greatland.com.au

W: https://greatland.com.au

NEWS RELEASE | 26 May 2026

Highlights

· Western Australia State primary environmental approval received from the WA Minister for the Environment for the development of the Havieron gold-copper project

· Both Havieron primary environmental approvals have now been received, following the Commonwealth primary environmental approval on 24 April 2026

· Final Investment Decision for Havieron targeted in the current June 2026 Quarter

Greatland Resources Limited (Greatland) (ASX:GGP, AIM:GGP) is pleased to announce that its Havieron gold-copper project (Havieron or the Project) has now received both primary environmental permits required for its development and operation.

Primary environmental approval from the Western Australian Minister for the Environment (Part IV approval under the Environmental Protection Act 1986 (WA) (EP Act)) was received on 25 May 2026 following a recommendation from the WA Environmental Protection Authority that the Project be implemented, subject to specified environmental conditions.

This follows the recent1 Federal environmental approval from the Commonwealth Department of Climate Change, Energy, the Environment and Water under the Environment Protection and Biodiversity Conservation Act 1999 (Cth) (EPBC Act).

State and Commonwealth primary environmental approval represents a key milestone, and allows Greatland to advance towards a Final Investment Decision targeted in the current June 2026 Quarter.

Tendering for critical path project packages and early works at Havieron are already underway, including boxcut tunnel installation, underground development and blind bore construction preparation.

Note (1): Refer to Greatland's 28 April 2026 announcement titled 'March 2026 Quarterly Activities Report'.

Greatland Managing Director, Shaun Day, commented:

"The receipt of both State and Federal environmental approval for our flagship Havieron development project is an important milestone for the project and for Greatland, and is the culmination of successful stakeholder engagement, diligence and persistence from our team.

Havieron is a substantial underground mining project that will deliver high-grade gold-copper ore to our Telfer processing facility. Once in steady state Havieron is anticipated to produce around 270koz of gold per annum at lowest quartile costs, with an initial mine life of 17 years.

The development of Havieron, alongside the successful delivery of Telfer life extensions, has the potential to underpin a multi-decade, world class gold-copper mining hub in the Paterson Province."

Contact

For further information, please contact:

Greatland Resources Limited

Shaun Day, Managing Director | Andrew Bowler, Head of Investor Relations

info@greatland.com.au

Nominated Advisor

SPARK Advisory Partners

Andrew Emmott / James Keeshan / Neil Baldwin | +44 203 368 3550

Corporate Brokers

Canaccord Genuity | James Asensio / George Grainger | +44 207 523 8000

RBC Capital Markets |  James Agnew / Jamil Miah | Scott Redwood  | +44 207 029 0528

Media Relations

Australia - Fivemark Partners | Michael Vaughan | +61 422 602 720

About Greatland

Greatland is a gold and copper mining company listed on the Australian Securities Exchange and London Stock Exchange's AIM Market (AIM:GGP, ASX:GGP), and operates its business from Western Australia.

The Greatland portfolio includes the 100% owned Telfer mine, the adjacent 100% owned brownfield world-class Havieron gold-copper development project, and a significant exploration portfolio within the surrounding region. The combination of Telfer and Havieron provides for a substantial and long-life gold-copper operation in the Paterson Province in the East Pilbara region of Western Australia.