Excellent regional exploration results reinforce exploration and growth

Strong drill results from Endurance’s 2,694m regional surface exploration programme at Manganese Range and Copper Chert have provided confidence in the exploration strategy and Endurance’s next phase of growth.

Endurance has received results from its 1,430m reverse circulation (RC) exploration programme at Manganese Range, located 25km west of the Abra Operation. The exploration campaign follows the successful drill campaign completed in Q4 2025.

Results from the programme have delivered significant and shallow high-grade silver mineralisation covering ~700m of strike east to west and remains open in both directions. Notably, the results indicate that further high-grade silver mineralisation could continue beyond the western most drill hole.

Copper Chert, approximately 11km west of the Abra Operation, returned encouraging results from a 1,264m RC drilling programme. Results from the 2026 drilling programme support the potential of Copper Chert and will be used to refine the geological model and guide future exploration activities.

Endurance plans to undertake further exploration activities in Q2 FY2027, comprising 16 RC holes for ~3,800m and three diamond drill holes for ~600m across the Manganese Range and Copper Chert prospects.

Results highlights include:

Manganese Range

7 Reverse Circulation (RC) holes for 1,430m at Manganese Range have returned high-grade silver results. Significant results include:

• 26MRRC001: 48.0m @ 41.6 g/t Ag and 0.8% Pb from 65.0m
  • Including 4.0m @ 180.3 g/t Ag from 99.0m.
• 26MRRC002: 45.0m @ 26.6 g/t Ag and 0.5% Pb from 66.0m
  • Including 1.0m @ 209.0 g/t Ag from 97.0m
• 26MRRC003: 74.0m @ 20.3 g/t Ag and 0.4% Pb from 63.0m
  • Including 7.0m @ 46.9 g/t Ag and 1.2% Pb from 121.0m.
• 26MRRC004: 68.0m @ 26.7 g/t Ag and 1.3% Pb from 70.0m
  • Including 1.0m @ 106.0 g/t Ag and 19.4% Pb from 126.0m.
• 26MRRC007: 40.0m @ 26.2 g/t Ag and 0.7% Pb from 106.0m
  • Including 1.0m @ 130.0 g/t Ag and 1.5% Pb from 134.0m.

Copper Chert

8 Reverse Circulation (RC) holes for 1,264m at Copper Chert were completed. Significant results include:

• 26CCRC001: 16.0m @ 1.2% Cu from 106.0m.
• 26CCRC004: 8.0m @ 0.7% Cu from 95.0m.
• 26CCRC006: 4.0m @ 1.3% Cu from 127.0m.

Said CEO and Managing Director Matthew Hine:

“The results from our regional drilling programme at Manganese Range and Copper Chert mark a significant step in demonstrating the broader potential of the Jillawarra tenement package and reinforces our belief Abra is just one part of a broader, highly prospective, mineral district. 

“At Manganese Range, every drillhole intersected broad zones of silver and lead mineralisation, including exceptional high-grade intervals exceeding 200.0 g/t silver. At Copper Chert, we have confirmed shallow, high-grade copper mineralisation with multiple encouraging intercepts that support the scale and potential of the system. These are outstanding results that validate our exploration strategy and provide strong confidence for the next phase of growth.

“The proximity of these discoveries to Abra’s existing processing infrastructure provides genuine potential to unlock multiple satellite deposits capable of supplementing mine feed, extending mine life and creating a diversified, multi-decade production profile. We see enormous opportunity to grow the value of the broader Abra district through systematic exploration.

“Supported by a substantial landholding, an established processing hub and a resilient balance sheet, Endurance is strategically positioned to convert exploration success into long-term growth as we continue building into a silver-focused, mid-tier, multi-asset metals miner renowned for endurance.”