Eastport Critical Metals Confirms Extensive Copper Mineralisation at Flagship Matsitama Copper Project with Multiple Intercepts Exceeding 100 Metres

About this update from Eastport Critical Metals Corp.

Phase One infill drilling has successfully confirmed the continuity and consistency of copper (Cu) mineralisation at the NAK-Main deposit Assay results demonstrate the apparent thickness of Nak-Main, with three holes intersecting more than 100m of copper mineralisation including internal higher-grade zones of 0.5% to >1.5 % Cu Copper mineralisation remains open along strike and at depth reinforcing the potential scale of the Nakalakwana deposit Vancouver, British Columbia--(Newsfile Corp. - July 20, 2026) - Eastport Critical Metals Corp. (TSXV: EVI) (OTCQB: EVIIF) ("Eastport" or the "Company") is pleased to announce positive assay results from the diamond drilling program at the Matsitama Copper Project. The first batch of assay results comprising 6 holes drilled as part of the NAK-Main zone historical resource infill drilling program announced on May 1, 2026 (link here.) have been received, with 5 holes confirming the presence of a thick copper-rich mineralised zone at the Nakalakwana deposit (see Figures 1 & 2). Daniel Major, CEO, commented; "The first batch of assay results from the Phase One drilling at the Nak-Main zone are extremely encouraging and successfully confirm the historical results demonstrating continuous copper mineralisation over 100 metres with multiple higher grade zones. The primary objective of this Phase One programme was to validate the historical drilling and to allow us to bring the historical SAMREC 2007 compliant mineral resource estimate into compliance with a future planned 43-101 compliant mineral resource update. In addition to proving up the Nak-Main zone resource potential, the step-out drilling assay results, which are currently awaited, will test the strike extent east and west of Nak-Main that represents a consolidated length of more than 10km. We look forward to releasing further results for Nak-Main and the step-out drilling at Nak-East and West in due course." Figure 1: Nakalakwana Phase 1 Drilling highlighting Geology Structures Figure 2: Nak Main Phase 1 drilling hole locations The assay results, obtained using ALS-Chemex South Africa's ICP-AES analytical technique (ME-ICP61), recognize a thick copper-rich mineralised zone associated with the Nak-Main deposit Mineralization was intersected in all five drill holes, as indicated in the Downhole Intersections below; Drill Hole NAKDD25-003 137.1 m @ 2,346...

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