Metalsource Mining expands high-grade corridor at Silver Hill

Hole SH26-18 returns 11.8 metres grading 245 g/t AgEq, including 1,580 g/t AgEq over 0.64 m, while extending mineralization 28 metres south of SH26-08 and beyond historical workings, supporting the continuity of a growing polymetallic system and improving targeting confidence toward higher grade mineralization. Vancouver, British Columbia--(Newsfile Corp. - June 24, 2026) - Metalsource Mining Inc. (CSE: MSM) (OTCQB: MSMMF) (FSE: E9Z) ("Metalsource" or the "Company") is pleased to announce additional assay results from its ongoing exploration program at the Silver Hill Project. The latest results continue to strengthen confidence in the continuity of the Silver Hill polymetallic system, with successful step out drilling extending mineralization beyond historical workings while refining the Company's understanding of a newly identified high grade zone.

Hole SH26-18 returned 11.8 metres grading 245 g/t silver equivalent ("AgEq") , including 833 g/t AgEq over 1.4 metres and 1,580 g/t AgEq over 0.64 metres , while extending mineralization approximately 28 metres south of previously reported hole SH26-08. The results further support management's belief that mineralization remains open along strike, down plunge and at depth, with multiple assays still pending from the current drill campaign. SH26-17 : Explores the northern edge of our recently identified high-grade zone which is locally internal to the widespread mineralization delineated thus far in the project.

SH26-17 identifies the target horizon between 185.59 and 185.75m with combined Pb-Zn values up to 14.3%, demonstrating mineralization remains open to the north. Additionally, this result shows that local variation in width and grade are common at Silver Hill. SH26-18 : 28m south step out from SH26-08, demonstrating continuity of widespread mineralization and improved targeting of recently defined high grade