Mr. Paul Olmsted reports

NORTHWEST REPORTS RESULTS FROM TWO HOLES AT ITS KWANIKA PROPERTY HIGHLIGHTED BY 26 METRES OF 0.72%COPPER AND 1.30 G/T GOLD (1.91% CUEQ) FROM 268 METRES

Northwest Copper Corp. has released additional positive drill results from two holes from its 2025 program at the company's 100-per-cent-owned Kwanika project in British Columbia. Drill hole K-25-281 delivered an excellent result, highlighted by an intercept of 26 metres grading 0.72 per cent Cu and 1.30 g/t Au (1.91 per cent copper equivalent), confirming the company's understanding and expectations of higher-grade zones within the Kwanika Central zone. Both drill holes also delivered broad intervals of near-surface copper-gold mineralization, strengthening the company's confidence in the initial phase of the project's open-pit potential.

The two drill holes achieved several key objectives, including:

• K-25-281 extended the upper Central zone by 30 metres to the northeast, in an area that is significantly wider than expected, with the Central zone remaining open to the northeast;
• K-25-281 confirmed the presence of higher-grade mineralization in the lower Central zone over substantial thicknesses;
• Increased understanding of a potential link between the Central zone and Pit zone;
• Improved confidence in the continuity of near-surface mineralization over significant widths.

By successfully achieving these objectives, the results underscore the potential to define and expand on the size of higher-grade mineralization within the Central zone. This supports the company's strategy of focusing on high-grade domains within the existing mineral resource to enhance the economics of a future preliminary economic assessment (PEA). In parallel, the consistent near-surface mineralization encountered in the Pit zone reinforces the opportunity for a high-grade starter pit, which could provide a strong foundation for further improvements in the economics of a future PEA.

Paul Olmsted, chief executive officer of Northwest, stated: "In 2025, the company changed its strategy to prioritize higher-grade zones within the existing mineralization at Kwanika. Results from the first seven holes of the 2025 exploration program have largely met or exceeded expectations, reinforcing the potential for meaningful grade improvements by focusing on higher-grade domains. The program to define these higher-grade zones is progressing exceptionally well, metallurgical test work is advancing rapidly, and we anticipate announcing initial results before the end of the year. This information will be used to support an updated mineral resource estimate, which will form the basis for evaluating alternative top-down underground mining methods. Our objective is clear: to deliver a more capital-efficient and economically robust open-pit and underground development plan in an updated PEA compared to the 2023 PEA."

Drill hole highlights:

• K-25-281:
  • Pit zone:
    • 38 metres of 0.48 per cent Cu and 0.12 g/t Au (0.61 per cent CuEq) from 44 metres;
    • 26 metres of 0.51 per cent Cu and 0.36 g/t Au (0.85 per cent CuEq) from 150 metres;
  • Central zone:
    • 40 metres of 0.63 per cent Cu and 0.95 g/t Au (1.50 per cent CuEq) from 254 metres;
    • Including 26 metres of 0.72 per cent Cu and 1.30 g/t Au (1.91 per cent CuEq) from 268 metres;
• K-25-282:
  • Pit zone:
    • 75.7 metres of 0.93 per cent Cu and 0.30 g/t Au (1.23 per cent CuEq) from 22.3 metres;
    • Including 43.7 metres of 1.26 per cent Cu and 0.41 g/t Au (1.66 per cent CuEq) from 22.3 metres.

Geoff Chinn, vice-president, business development and exploration, of Northwest, added: "It is encouraging to see both holes intersect higher-grade, near-surface mineralization over significant widths, well suited to support a potential starter pit. In addition, a previously unmodelled higher-grade copper zone is emerging immediately south of Pit zone 5, potentially improving on our understanding of mineralization within the broader Pit zone. Hole K-25-281 supports our interpretation of two wide, continuous higher-grade mineralized intervals in the Central zone grading between 1.5 per cent and 2.5 per cent CuEq over combined true thicknesses between 30 and 45 metres separated by late dikes. This hole also intersected a wide upper Central zone interval that extends the zone by at least 30 metres towards the northeast. We also observe a clear trend of increasing gold-to-copper ratios from east to west in the Central zone, with the Pit zone showing a similar pattern, although rotated from south to north. This progression suggests a potential link between the two zones, and we expect that additional drill results in the coming weeks should help clarify this relationship."

Kwanika exploration program

On April 10, 2025, Northwest announced a refined model for its flagship Kwanika project (Target Model), highlighting three key higher-grade zones: the Pit, Central and Western zones. These zones target grades of 1.5 per cent to 2.5 per cent CuEq over combined true thicknesses of 30 to 45 metres, to be assessed against a more selective top-down bulk underground mining method.

The 2025 exploration program is designed to confirm, define and expand on the company's understanding of higher-grade copper-gold mineralization within the current mineral resource, with the aim of supporting alternative bulk mining methods. Early results from the first seven holes, including hole K-25-281 and K-25-282, confirm significant progress toward these objectives.

Continuous mineralized intercepts are summarized in Table 1.

A summary of the geological aspects of the hole is presented below.

Hole K-25-281: The hole was drilled with HQ core size and sampled on approximately two-metre intervals from sawn half core material. The hole was drilled on 265-degree azimuth with a minus-70-degree dip to a depth of 354 metres. The primary objective of the hole was to test northeast extensions of the Central zone in an area poorly defined by historical low-angle holes.

Before entering the Central zone, the hole intersected two near-surface zones within the Pit zone. The first interval was 38 metres (24 metres true width) consisting of finely disseminated sulphides in potassic-altered (monzonite), correlating with Pit zone 8 beginning at 44 metres. The second interval, starting at 150 metres, returned 26 metres (true width unknown) of higher grades with an increasing gold-to-copper ratio. This interval consisted of magnetite-hematite alteration within fine-grained porphyritic diorite with disseminated pyrite. The interval also correlates with Pit zone 8.

At 254 metres, the hole intersected a broad upper Central zone (zone 4) interval over 40 metres (33 metres true width) of monzonite cut by dismembered quartz stockwork. This interval was significantly wider than expected and extends the upper Central zone approximately 30 metres to the northeast, where it remains open.

Farther down the hole, mineralization is terminated by late dikes, then resumes on the opposite side in highly tectonized potassic alteration crosscut by dismembered quartz stockwork over 24 metres (20 metres true width). This interval correlates with the lower Central zone (zone 6) and similarly extends the zone 30 metres toward the northeast, where it also remains open.

In summary, hole K-25-281 was successful in extending the Central zone by approximately 30 metres toward the northeast.

Hole K-25-282: The hole was drilled using HQ core size sampled on approximately two-metre intervals from sawn half core. The hole was drilled on 140-degree azimuth with a minus-75-degree dip to a depth of 401 metres. The primary objective of the hole was to test the closure (intersection) of Central zone (zone 4) and the Western zone (zone 2).

At 22 metres, the hole intersected a broad interval of high-grade, copper-dominant mineralization over 76 metres (54 metres true width) hosted in monzonite crosscut by quartz stockwork. This intersection helps to define the grade, geometry and orientation of a distinct high-grade copper zone immediately south of Pit zone 5. Metal zonation in this area also shows a rotation, with high copper-to-gold ratios transitioning to high gold-to-copper ratios toward the north. This shift in metal zonation from east-west in the Central zone to south-north in the Pit zone provides additional support that these zones are related.

In summary, hole K-25-282 successfully confirmed the presence of a separate, copper-dominant, high-grade mineralized zone within the Pit zone that may extend toward the Central zone. This potential connection will be tested with results from holes K-25-273 and K-25-287. Otherwise, the hole was drilled too far to the east to have tested the intersection between the Central and the Western zones.

Quality assurance/quality control

Drilling at Kwanika in 2025 was designed and supervised by Northwest, implemented by InData Geoscience with assay QA/QC checks by Explore Geosolutions. Samples were collected, tracked and an external QA/QC program was implemented using blanks and standards to monitor analytical accuracy and precision. The samples were sealed on site and shipped to Activation Laboratories Ltd. (Actlabs) in Kamloops, B.C. The laboratory's internal quality control system complies with global certifications for quality ISO 17025. Drill core samples were analyzed using a combination of Actlabs multielement 1F2 analysis for low-level concentrations (four-acid digestion and ICP-OES) and the eight-/four-acid ICP-OES analysis for higher-level concentrations (four-acid digestion and ICP-OES, with automatic overlimits for base metals and silver). Gold, platinum and palladium assaying was completed with 1C-OES method, using a 30-gram fire assay with ICP finish analysis. In addition, about 5 per cent of the sample pulps are reassayed at a secondary laboratory to confirm reproducibility and check for bias.

Technical aspects of this news release have been reviewed, verified and approved by Geoff Chinn, PGeo, vice-president, business development and exploration, for Northwest, who is a qualified person as defined by National Instrument 43-101, Standards of Disclosure for Minerals Projects.

About Northwest Copper Corp.

Northwest is a copper-gold exploration and development company with a pipeline of advanced- and early-stage projects in British Columbia, including Kwanika-Stardust, Lorraine-Top Cat and East Niv. With a robust portfolio in an established mining jurisdiction, Northwest is well positioned to participate fully in strengthening global copper and gold markets. The company is committed to responsible mineral exploration, which involves working collaboratively with first nations to ensure future development incorporates stewardship best practices and traditional land use.

We seek Safe Harbor.