Drill-ready targets & properties

Miller Copper-Gold Property · Kirkland Lake, ON

Cam Copper Project

The historic Cam Copper Mine is a road-accessible, high-grade copper-gold-silver VMS system located approximately 2.5 kilometres southwest of the Allied Gold Zone on Northstar’s 100%-owned Miller Copper-Gold Property near Kirkland Lake, Ontario.

• 14.78% Cu over 2.45 m, including 21.7% Cu over 1.35 m – Zone 2
• 8.17% Cu over 1.50 m, including 16.05% Cu over 0.60 m – Zone 2
• Hole CC-25-14: 3.05% Cu, 5.9 g/t Au, 22.9 g/t Ag and 0.45% Mo over 3.07 metres
• Hole CC-25-16: 13.95% Cu, 0.62 g/t Au and 32 g/t Ag over 0.56 metres
• 1,204-metre definition drill program completed in December 2025

Miller Copper-Gold Property

Allied Gold Zone

The Allied Gold Zone is an advanced, near-surface alkalic intrusion-hosted gold-telluride system located approximately 2.5 kilometres northeast of Cam Copper on the Miller Copper-Gold Property.

• 6.6 g/t Au over 117.0 m
• 4.0 g/t Au over 50.6 m
• 1.43 g/t Au over 118.5 m
• 1.2 g/t Au over 107.3 m
• SRK Exploration Target: 250,000 – 500,000 ounces Au* at 1.39 – 2.04 g/t Au

* The above Exploration Target range in tonnes and grade highlights the exploration potential of the Allied Gold Zone. The quantity and quality are purely conceptual in nature. Insufficient exploration has been carried out to define a mineral resource on the property and a Qualified Person has not done sufficient work to classify the Exploration Target projections as current mineral resources. These values cannot and should not be relied upon are only included herein as an indication of potential mineralization on the Property. Additional exploration including a 43-101 Technical Report, CIM and NI-43-101 reporting compliant mineral resource estimate and Preliminary Economic Assessment are required to establish the economic potential of the Allied Gold Zone. It remains unclear whether a mineral resource will be delineated on the Property.

18 km southeast of Kirkland Lake

Searles Property

The 64-hectare Searles Property, located 18 km southeast of Kirkland Lake, overlays the eastern segment of Vein 1 and a historic Miller Independence resource estimate.*

• Historic Miller Independence resource estimate* (1987) of 0.73Mt grading 11.5 g/t Au** (270,000 contained ounces of gold) on Vein 1
• Historic intersections include 96.0 g/t Au over 3m and 13.4 g/t Au over 2.3m at the west end, and 11.2 g/t Au over 2.4m at the east end
• Vein 1: true widths from 0.5m to 24m, spanning a 1 km northeast strike length
• 2021 assay results included 2 g/t Au over 5.0m (S21-01) and 6.12 g/t Au over 1.3m (S21-06)

* Historic estimate. While 2021 drilling provides evidence that the Vein 1 hosts anomalous gold over a very broad area along strike and down dip, drill results failed to confirm twinned historic 1987-88 assay results. The nugget effect is very pronounced in No.1 Vein and larger diameter core is required to adequately assess gold grade.

Temagami greenstone belt · Strathcona Township, ON

Milestone (Cu-Ni-Co)

Northstar’s 100%-owned Milestone Cu-Ni-Co Property consists of 28 contiguous, unpatented claim units covering 615 hectares within the Temagami greenstone belt in Strathcona Township, Ontario.

• Similar geology to Teck Resources former high-grade Temagami Copper Mine, 20 km southwest along strike*
• Diadem deposit historic estimate of 500,000 Tons grading 0.5% Cu and 0.1% Ni, open along strike and at depth**
• 76.7 line km UAV magnetic survey completed in late 2022
• 29 samples assayed 0.20 - 1.52% Cu, 0.05 to 0.61% Ni and 0.005% to 0.134% Co