Bunker Hill intercepts 16.3 oz/ton Ag, 41.1% Pb, 7.41% Zn in Cate-8 vein

KELLOGG, Idaho and VANCOUVER, British Columbia , Aug. 31, 2026 (GLOBE NEWSWIRE) -- Bunker Hill Mining Corp. (“ Bunker Hill ” or the “ Company ”) ( TSX: BNKR | OTCQB: BHLL ) is pleased to announce additional assay results from its ongoing underground exploration drilling program in the Bunker Hill Mine (the “ Bunker Hill Mine ”), with combined silver-equivalent metal grades up to 24.43 oz/ton or 837.74 g/t AgEq, see below for calculations (41.1% lead, 13.8 oz/ton silver, 2.86% zinc).

The latest drill results continue to confirm the continuity and scale of high-grade silver-polymetallic mineralization at the recently discovered Cate-8 zone while supporting the Company's objective of completing an initial resource estimate for Cate-8 by the end of the year.

HIGHLIGHTS

New silver-lead-zinc drill intercepts continue to expand the Cate-8 mineralized system to over 1100 feet along strike and 1250 feet downdip

BHD26-17: 12.5 feet at 2.94 oz/ton Ag, 3.2% Pb (3.75 oz/ton AgEq), including 7 feet at 4.75 oz/ton Ag, 4.4% Pb (5.82 oz/ton AgEq)

BHP26-24: 3.2 feet at 4.19 oz/ton Ag, 10.6% Pb (6.78 oz/ton AgEq), including 0.7 feet at 15.7 oz/ton Ag, 33.7% Pb and 1.1% Zn (23.89 oz/ton AgEq)

Channel sampling from a recently completed underground drift on the Cate-8 zone cut 46 ft of continuous lead - silver mineralization.

Cate-8 Exploration Target Estimate shows 55% growth in tonnage and a 34% increase in contained silver-equivalent ounces from the prior calculation ( July 15, 2026, Bunker Hill Mining news release )

At a cut-off grade of 50 g/t AgEq, the current Cate-8 Target model includes 522k tons at a grade of 5.34 oz/ton AgEq for 2.79M ounces of silver equivalent metal (see details below)

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