Corporate Presentation UpdateTargeting operations from 2026,...

Corporate Presentation Update Targeting operations from 2026, long-term 1st quartile AISC production

HIGHLIGHTS Tunkillia JORC Resources now 1.6Moz Au for Optimised Scoping Study (OSS) OSS advancing quickly with significantly improved economics anticipated 'Stage 1' Central Gawler Mill restart options under review, targeting 2026 start

Dear Investors & Colleagues, Following our announcement that Tunkillia's JORC Resources have grown to1.6Moz Au and 3.1Moz Ag, we are pleased to share anupdated corporate presentation. We are receiving increasingly significant interest from international investors as to whether we intend to take advantage of record gold prices - and the answer is yes. An AUD $4,500 gold price makes our Central Gawler Mill a valuable point of leverage for Barton. We are able to utilise this to, for example, process materials from our fully permitted Perseverance Mine (Tarcoola Project) while evaluating other sources. As an established, fully permitted mill, it is also a relatively low-cost doorway to operations. Low-dilution, low-risk 'Stage 1' production at our Central Gawler Mill will further reinforce a strong platform and de-risk delivery of our 'Stage 2' (Tunkillia) expansion project, taking Barton to our long-term gold production target of 150,000oz annually. We are excited to move forward and I look forward to meeting with many of you in Australia, Switzerland, the UK and the US during the coming 5 weeks and ahead of many further updates (seeherefor opportunities to hear the Barton story in person). A detailed copy of this announcement can be found on the ASX platform and the Company's websitehere. Regards, Alexander Scanlon Managing Director & CEO