Group Eleven Drills 11.8m of 13.4% Zn+Pb (3.3% Zn and 10.1% Pb) and 45 g/t Ag in 80m Step-Out; and Confirms Deeper Cu-Ag Mineralization in 720m Step-Out

About this update from Group Eleven Resources Corp.

Vancouver, British Columbia--(Newsfile Corp. - May 28, 2026) - Group Eleven Resources Corp. (TSXV: ZNG) (OTCQB: GRLVF) (FSE: 3GE) ("Group Eleven" or the "Company") is pleased to announce new assay results from three drill holes at its Ballywire discovery ("Ballywire") at the 100%-owned PG West Project ("PG West"), Republic of Ireland. Highlights: "Today's results are pivotal, showing high-grade massive sulphide mineralization continues further SW than previously recognized at Ballywire," stated Bart Jaworski, CEO. "This opens-up potential to significantly extend the high-grade massive sulphide corridor drilled to date over a strike length of approximately 1.5km. Separately, today's results provide two more holes intersecting Deeper Cu-Ag mineralization at Ballywire. One of these holes represents a 720m step-out to the SW, adding conviction that Deeper Cu-Ag mineralization may extend across the entire discovery to date. 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 To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/5685/299165_3323773104e5a873_002full.jpg Note: True thickness of mineralization as a percentage of the down-hole interval, is estimated to be 90-100% for today's results from 26-3552-57; faulting was encountered below the Waulsortian Limestone (not shown on section) Exhibit 2. Cross-Section B-B' Showing Today's Results from 25-3552-53 at Ballywire To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/5685/299165_3323773104e5a873_003full.jpg Note: True thickness of mineralization as a percentage of the down-hole interval, is estimated to be 70-80% for today's results from 25-3552-53 Exhibit 3. Cross-Section C-C' Showing Today's Results from 25-468-22 at Ballywire To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/5685/299165_3323773104e5a873_004full.jpg Note: True thickness of mineralization in 25-468-22 as a pe...

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