Announcement PDF _____________________________________________________________________________________________________________ Office Address London House, Level 8, 216 St Georges Terrace, PERTH WA 6000 Postal Address GPO Box 2517, PERTH WA 6831 Phone +61 8 9481 0389 Fax +61 8 9463 6103 Email info@estrellaresources.com.au 28 October 2025 Limestone Drill Program Commenced HIGHLIGHTS ➔ CoreSearch has mobilised both diamond and RC drill rigs to the Werumata Limestone Project ➔ Water bores to support drilling and dust suppression have been completed ➔ First diamond drill-hole at Werumata is underway with WLD001 ➔ All RC drilling equipment and crews are on-site with drilling to commence Wednesday 29 October ➔ All drill pads and access roads for drill sites completed ahead of schedule and budget ➔ Drilling to consist of initial 6 diamond and 26 RC drill holes. A follow up program will commence immediately thereafter, subject to initial assay results Figure 1: Collaring of the first diamond drillhole WLD001 at the Werumata Limestone Project with Estrella’s exploration team and Coresearch drill team. Estrella Resources Limited (ASX: ESR) (Estrella or the Company) is pleased to announce the start of the Company’s maiden drill campaign at the Werumata Limestone Project, Timor-Leste. ASX: ESR Commenting on the commencement of drilling Estrella Managing Director Chris Daws said: “Drilling our first holes into Werumata has come with exceptional speed. Initial discovery, grab sample assays, project concept and third-party agreements with potential partners has all come in rapid time as we assist in building a totally new industry with Timor-Leste. All those that have been involved can be proud of the speed and execution of their work, with zero LTI’s or equipment loss. Support by the Timor-Leste government institutions has been exceptional and we continue to grow strong relationships with them and our partners. There is still an immense amount of work to do as we firm up the limestone resources, project design, financial modelling, preliminary engineering for port, power, bulk handling, mine infrastructure and all that goes into a project of this scale. Our commitment to Timor-Leste is unwavering, Timor-Leste’s official entry into ASEAN as the 11th Nation is another strong reason to build on our efforts to grow with Timor-Leste and its people. It’s an exciting time for Estrella as we move forward with purpose and vision to unlock the mineral opportunities of Timor-Leste as a first mover. GO ESTRELLA.” Figure 2. RC drill rig unloading at Werumata staging point in preparation of commencement of drilling Over many weeks, Estrella has conducted the community education and consultation processes which concluded with cultural ceremonies by the communities and their leaders. The local communities have been engaged in Estrella’s exploration program for many months, and the Company looks forward to continuing the mutually beneficial relationship it has built. The past few weeks has seen the establishment of water resources for the drilling program and dust suppression. Two water bores were put in and water will also be sourced utilising local water trucks. Mobilisation of the Diamond Drill rig from Ira Miri, and the Reverse-Circulation Rig and support equipment (Figure 1 & 2) from Dili was completed without incident. Estrella has opted to use the Ira Miri Diamond Drill rig as a fast-track option to commence immediate drilling of the limestone whilst our teams prepare for the extraction of a market sample from the Ira Miri manganese project (subject to government approvals being obtained). All access tracks and drill pads for the expected program have been constructed by the local excavator teams ahead of schedule and below budget estimates. The initial drilling program will see both diamond and RC drill holes across two large limestone plateaus with a target to define an inferred resource in excess of 500Mt of limestone. The Company will update shareholders as exploration unfolds and results come to hand. The Board has authorised for this announcement to be released to the ASX. FURTHER INFORMATION CONTACT Christopher J. Daws Managing Director Estrella Resources Limited +61 8 9481 0389 info@estrellaresources.com.au Media: David Tasker Managing Director Chapter One Advisors E: dtasker@chapteroneadvisors.com.au T: +61 433 112 936 Forward Looking Statements This announcement contains certain forward-looking statements which have not been based solely on historical facts but, rather, on ESR’s current expectations about future events and on a number of assumptions which are subject to significant uncertainties and contingencies many of which are outside the control of ESR and its directors, officers and advisers.