Group Eleven drills 23.60% Cu, 506 g/t Ag over 0.6m

Vancouver, British Columbia--(Newsfile Corp. - June 11, 2026) - Group Eleven Resources Corp. (TSXV: ZNG) (OTCQB: GRLVF) (FSE: 3GE) (" Group Eleven " or the " Company ") is pleased to announce new assay results from drill hole 26-3552-57 at its Ballywire discovery (" Ballywire ") at the 100%-owned PG West Project (" PG West "), Republic of Ireland. Highlights: 26-3552-57 - Drilled 80m SW of 25-3552-51 (which intersected 52.3m of 10.3% Zn+Pb, 330 g/t Ag and 0.40% Cu; announced 25-Feb-2026): 62.5m of 5.6% Zn+Pb and 25 g/t Ag (at the base of the Waulsortian Limestone; starting from 329m downhole; announced 28-May-2026), including 11.8m of 13.4% Zn+Pb and 45 g/t Ag Today announced new assays showing nine (9) zones of mineralization from the Deeper Cu-Ag target (starting from 400m downhole), with highlights as follows: 14.9m of 53 g/t Ag and 0.08% Cu, incl. 2.8m of 143 g/t Ag , 0.31% Cu , incl. 0.9m of 371 g/t Ag , 0.82% Cu and 0.10% Sb ; and 6.6m of 83 g/t Ag, 1.60% Cu and 0.19% Sb , incl. 1.0m of 279 g/t Ag, 5.62% Cu and 0.78% Sb and 2.8m of 110 g/t Ag, 5.09% Cu and 0.44% Sb , incl. 0.6m of 506 g/t Ag, 23.60% Cu and 2.04% Sb Four rigs continue to be active at Ballywire with an additional rig active at the adjacent 77.64%-interest Stonepark Project "Today's 23.60% Cu result represents some of the highest copper grades attained by any operator over the last 60 years of modern mineral exploration history in Ireland," stated Bart Jaworski, CEO. "This high-grade intercept, accompanied by 506 g/t Ag and 2.04% Sb, is one of nine zones of mineralization, some of which also attained grades of up to 5.62% Cu, 371 g/t Ag and 0.78% Sb." "Today's results also represent the seventh drill hole and the fourth drill fence at Ballywire to intersect Deeper Cu-Ag mineralization thus far.

Not including the 720m step-out announced in our