• 41% increase in Total Mineral Resource at Queen Hill to 4.11Mt @ 0.85% Sn
• Total Mineral Resource increased to 9.5 Mt @ 0.93% Sn for 88,100t of contained tin
• Expanded drilling program continues to validate and expand the Heemskirk tin system

Stellar Resources Limited (ASX: SRZ) is pleased to present its quarterly activities report for the period ended 31 March 2026. Key achievements during the quarter centred around ongoing Prefeasibility Study (PFS) activities aimed at advancing the Heemskirk Tin Project towards development ready status. An updated Mineral Resource Estimate (MRE) at Queen Hill (using a 0.40% lower cutoff) has estimated a 41% increase in Total Mineral Resource to 4.11Mt @ 0.85% Sn for 34,900t of contained tin, and a 46% increase in Indicated Resource to 2.26Mt @ 0.94% Sn for 21,190t of contained tin. The total Mineral Resource Estimate for the Heemskirk Tin Project now stands at 9.51Mt @ 0.93% Sn (88,100t contained Tin), making it the highest-grade undeveloped tin resource in Australia and the third globally. The expanded infill and extensional diamond drilling program continued with positive results reported from Severn, including a new zone of high-grade mineralisation approximately 60m below the existing Resource model. Stellar also secured consent to apply for a Mining Licence for a proposed Tailings Storage Facility within the adjacent Comstock site, a critical infrastructure milestone. The company anticipates reporting an updated Resource at Severn in Q2 2026 and the completion of the PFS in early Q3 2026.

Stellar is aiming to become a producer of 3,000 - 3,500tpa of payable tin, approximately 1% of global supply. However, this is an aspirational statement and the company does not have reasonable grounds to believe the statement can be achieved.