Group Eleven drills 3.7m of 7.7% Zn+Pb, 418 g/t Ag, 1.02% Cu in 17.6m at step-out

Vancouver, British Columbia--(Newsfile Corp. - August 20, 2026) - Group Eleven Resources Corp. (TSXV: ZNG) (OTCQB: GRLVF) (FSE: 3GE) (" Group Eleven " or the " Company ") is pleased to announce assay results from four holes at its Ballywire discovery (" Ballywire ") at the 100%-owned PG West Project (" PG West "), Ireland.

Highlights:

26-468-24 – Testing Deeper Cu-Ag target at the SW end of discovery area (710m away from nearest hole testing similar mineralization) and filling a 180m gap between prior drilling, returned: 3.6m of 345 g/t Ag , 0.75% Cu (starting at 449m downhole), incl. 0.6m of 2120 g/t Ag , 4.50% Cu and 0.27% Sb

26-3552-56 – Drilled at the NE end of currently defined discovery area and filling a 110m gap between previous drilling, returned: 17.6m of 4.1% Zn+Pb (2.6% Zn and 1.5% Pb), 111 g/t Ag, 0.27% Cu (starting at 305m downhole, hosted within the Waulsortian Limestone), incl.

10.2m of 3.7% Zn+Pb (2.3% Zn and 1.4% Pb), 182 g/t Ag, 0.46% Cu , incl. 3.7m of 7.7% Zn+Pb (5.4% Zn and 2.3% Pb), 418 g/t Ag, 1.02% Cu

26-3552-60 – Drilled approx. 80m downdip of 26-3552-57 (which intersected strong Deeper Cu-Ag mineralization totalling 6.6m of 83 g/t, 1.60% Cu, 0.19% Sb; and 2.8m of 110 g/t, 5.09% Cu, 0.44% Sb; see news release dated 11-Jun-2026) returned: 2.3m of 126 g/t Ag , 1.01% Cu , 0.12% Sb (starting from 501m downhole), incl. 0.2m (0.19cm) of 1355 g/t Ag , 11.00% Cu , 1.30% Sb and

15.4m of 39 g/t Ag and 0.82% Cu , incl. 7.5m of 77 g/t Ag , 1.61% Cu and 0.17% Sb , incl. 0.7m of 643 g/t Ag, 13.95% Cu, 1.42% Sb and

6.4m of 41 g/t Ag and 0.88% Cu , incl. 2.7m of 77 g/t Ag and 1.67% Cu

26-468-25 – First ever hole drilled at gravity 'Anomaly A' (approx. 2km to the SW of the currently outlined discovery limits), returned multiple interval