Group Eleven Drills Nine Cu-Ag Intervals, including 23.60% Cu, 506 g/t Ag, 2.04% Sb over 0.6m in a Wider 2.8m Zone and 6.6m of 1.60% Cu, 83 g/t Ag, 0.19% Sb

About this update from Group Eleven Resources Corp.

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: "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 last news release (28-May-2026) showing what appears to be the beginning of new zone of Deeper Cu-Ag mineralization, the three highest grading Cu-Ag drill fences drilled thus far now represent an impressive strike-length of 430m. This new evidence provides us with growing conviction that Deeper Cu-Ag mineralization may extend across the entire Ballywire Zn-Pb-Ag discovery, which is currently known to span approx. 3.2km along prospective trend of 6km. With a robust treasury and our most ambitious drill campaign to date - bolstered by our $12m financing in March, allowing go-forward funded drilling to increase from 20,000m to approx. 67,000-75,000m - we are poised to continue unlocking this discovery's full potential." Exhibit 1. Cross-Section A-A' Showing Today's Results from 26-3552-57 at Ballywire Note: True thickness of mineralization as a percentage of the down-hole interval, is estimated to be 70-90% for today's results from 26-3552-57 To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/5685/301020_7ec66efd04d34ace_002full.jpg Exhibit 2. Plan Map of Main Ballywire Discovery Corridor, Showing New Assays Note: Bright green label showing 430m distance denotes strike extent of drill testing for Deeper Cu-Ag mineralization To view an enhanced version of this graphic, please visit:https://images.newsfileco...

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