HM Exploration Drills 18.45 Metres of 1.14% Cu, 2.42 % Zn, 16.74 g/t Ag and 0.32 g/t Au in Upper Lens; 5.42m of 1.99% Cu, 1.66% Zn, 15.39g/t Ag and 0.8g/t Au in Lower lens at Lewis Pilley's

VANCOUVER, BC / ACCESS Newswire / August 4, 2026 / HM Exploration Corp. ("HM Exploration", "HM" or the "Company") (CSE:HM)(FSE:X5H)(OTCQB:HMEXF) is pleased to announce the remaining assay results from the Company's Phase One drilling program (the "Program") at its Lewis Pilley's Project (the "Project") in Newfoundland, Canada. Assay results in this release cover drill holes eight (8) to twelve (12).

"The remaining Phase One assay results demonstrate consistent polymetallic grades across meaningful widths," said Nick Rodway, CEO of HM Exploration. "Both the upper and lower lenses continue to demonstrate continuity and remain open for expansion. Individual sample intervals in the upper lens returned grades of up to 8.14% copper and 27.3% zinc, while the lower lens returned up to 149 g/t silver and 10.23 g/t gold. The fact that we're getting these grades means there's a bigger system capable of producing exceptional grade somewhere nearby. Our goal is to follow these clues back to where all that metal originated, which could be the high-grade core of the system. These results are not just about what we have now, but about where we're heading next. We look forward to completing the planned EM surveys, which will help refine targets for Phase Two drilling."

Highlights:

• Upper lens extended to 145 metres; lower lens extended to 40 metres.

PI-26-008*

Upper Lens

• 18.45m of 1.14 % Cu, 2.42 % Zn, 16.74 g/t Ag, and 0.32 g/t Au (7.55 - 26m)

  • Including 2.25 % Cu, 2.27 % Pb, 27.3 % Zn, 102 g/t Ag, and 2.42 g/t Au over 0.71m (18.92 - 19.63m)

    • Including 4.74 % Cu, 2.54 % Zn, 36.94 g/t Ag, and 0.53 g/t Au over 1.95m (23.4 - 25.35m)

      • And including 7.87 % Cu, 2.99 % Zn, 83 g/t Ag, and 0.95 g/t Au over 0.50m (23.4 - 23.9m)

      • And including 8.14 % Cu, 3.82 % Zn, 38.8 g/t Ag, and 0.7 g/t Au over 0.57m (24.3 - 24.87m)

Lower Lens

• 6.32m of 0.91 % Cu, 2.37 % Zn, 29.3 g/t Ag, and 1.63 g/t Au (163.45 - 169.77m)

  • Including 1.06 % Cu, 2.06 % Pb, 4.72 % Zn, 71.27 g/t Ag, and 4.23 g/t Au over 2.21m (163.45 - 165.66m)

    • And including 0.72 % Cu, 4.29 % Pb, 10.9 % Zn, 149 g/t Ag, and 10.23 g/t Au over 0.82m (163.45-164.27m)

    • Including 2.44 % Cu, 2.85 % Zn, 17.49 g/t Ag, and 0.6 g/t Au over 1.22m (168.55 - 169.77m)

PI-26-009*

Upper Lens

• 7.57m of 1.95 % Cu, 2.89 % Zn, 17.1 g/t Ag, and 0.31 g/t Au (15.75 - 23.32m)

  • Including 2.85 % Cu, 0.51 % Pb, 4.03 % Zn, 24.65 g/t Ag, and 0.43 g/t Au over 4.88m (17.12 - 22.00m)

Lower Lens

• 3.38m of 1.03 % Cu, 0.43 % Zn, 7.71 g/t Ag, 0.37 g/t Au (155.62 - 159.00m)

  • Including 2.91 % Cu, 0.42 % Zn, 16.3 g/t Ag, and 0.8 g/t Au over 1.02m (156.64 - 157.66m)

PI-26-010*

Lower Lens

• 5.42m of 1.99 % Cu, 1.66 % Zn, 15.49 g/t Ag, 0.8 g/t Au (141.81 - 147.23m)

  • Including 2.49 % Cu, 2.04 % Zn, 18.96 g/t Ag, and 0.99 g/t Au over 4.09m (141.81 - 145.90m)

    • And including 4.90 % Cu, 1.11 % Zn, 18.60 g/t Ag, and 0.86 g/t Au over 0.90m (145.00 - 145.90m)

  • 2.48m of 0.57 % Cu, 1.01 % Zn, 9.27 g/t Ag, 0.35 g/t Au (135.30 - 137.78m)

    • Including 1.17 % Cu, 1.72 % Zn, 15.40 g/t Ag, and 0.51 g/t Au over 0.98m (136.80 - 137.78m)

  * All reported intervals represent drilled lengths. True widths of the mineralized intersections are currently unknown.

• Optical and acoustic televiewer surveys were completed, with data currently being processed for delivery to the Company.

• Downhole and ground EM surveys are mobilizing soon to support target refinement for 2026 Phase Two drilling, which will test potential extensions of the mineralized system.

The 2026 Phase One drilling Program was focused on evaluating the continuity of the mineralized system below known surface showings and along strike of the Clifford Jones (Bull Road) Zone (the "Zone") to improve the Company's understanding of the geological controls on mineralization (Figure 1).

Assay results from drill holes eight (8), nine (9), and ten (10) continue to show significant polymetallic mineralization in both the upper and lower sulphide lenses (Figure 2). The upper targeted copper-bearing debris flow is currently continuous over an approximate strike length of 145 metres, and the lower mineralized sulphide lens is currently continuous over an approximate strike length of 40 metres. Both mineralized horizons remain open along strike and down dip. While holes eleven (11) and twelve (12) did not intersect as notable mineralization, they have intersected disseminated mineralization straddling the continuation of the trend. These two drill holes, coupled with the upcoming EM surveys, will help provide the geological information required to determine where to drill next in Phase Two.

The mineralization from the upper zone is characterized by semi-massive to massive fragments of sulphide that have been fractured, transported, and chaotically mixed with varying types of volcanic rock. The fragments range from rounded to angular, possibly indicating multiple phases of transportation and reworking of these fragments through moderate to distal transport from the original deposition site.

The mineralization from the lower zone is characterized by more massive and coherent fragments of sulphide with less rounding and fracturing than observed in the upper zone. The relatively intact nature of these fragments provides evidence that the new lower mineralized sulphide lens may represent debris deposited closer to the original hydrothermal vent system.

Oblique views of drill holes seven (7), eight (8), nine (9), and ten (10) are presented in Figures 3 - 5 illustrating select corresponding drill core photos of the upper and lower mineralized lenses.

With all assay results now received from the Phase One drill program it appears that multiple stacked sulphide lenses are present within the Project's Volcanogenic Massive Sulphide ("VMS") system (Figure 6). Geological interpretation is ongoing and will incorporate results from the recently completed televiewer survey once the processed data are received.

Significant assay results from holes eight (8) to twelve (12) are summarized in Table 1 and drill collar data can be found in Table 2.

Table 1: Significant assays from Phase One drilling Program at the Clifford Jones (Bull Road) Zone.