First Challenger Assays Return Grades up to 170g/t Au

New zones of high-grade mineralisation identified in open pit walls HIGHLIGHTS 8,065m reverse circulation (RC) Resource upgrade drilling recently completed at Challenger 'Main', 'Challenger West' (CW) open pits, and 'Challenger South-Southwest' (CSSW) and 'Challenger 3' targets[1] Challenger's 'Main' open pit operated during 2002 - 2004; drilling has identified new high-grade mineralisation in the open pit's walls and extensions, where new assays include: [2] Hole ID Interval Including: CHB0140 9m @ 2.20 g/t Au from 97 metres 1m @ 6.63 g/t Au from 103 metres CHB0158 11m @ 5.67 g/t Au from 24 metres 10m @ 17.7 g/t Au from 40 metres 1m @ 50.9 g/t Au from 27 metres 1m @ 170.7 g/t Au from 43 metres CHB0159 14m @ 1.01 g/t Au from 19 metres 3m @ 4.72 g/t Au from 40 metres 3m @ 2.55 g/t Au from 22 metres 1m @ 11.8 g/t Au from 40 metres CHB0165 3m @ 6.85 g/t Au from 121 metres 1m @ 15.0 g/t Au from 121 metres Further assays pending for the CW open pit, and the CSSW and Challenger 3 open pit targets Challenger DFS underway targeting a viable, simplified 'baseline' Stage 1 operation to underwrite restart of CGM and maximise Challenger, Tarcoola, Wudinna and Tolmer development optionality ADELAIDE, AU / ACCESS Newswire / April 19, 2026 / Barton Gold Holdings Limited (ASX:BGD)(OTCQB:BGDFF)(FRA:BGD3) (Barton or Company) is pleased to announce initial assay results from recent drilling at its South Australian Challenger Gold Project (Challenger). Challenger is the site of the Company's fully permitted Central Gawler Mill (CGM).