TORONTO, Ontario — November 6, 2025 — Leads & Copy — NorthWest Copper Corp. (TSX-V: NWST) has announced positive assay results from the third drill hole of its 2025 diamond drilling program at the Kwanika project in British Columbia.

Drill hole K-25-271 intersected multiple copper-gold zones, including 27.7 metres grading 1.23 % Cu, 1.53 g/t Au (2.63% copper equivalent) within the Central Zone, according to the company. The results support management’s belief that the 2023 Preliminary Economic Assessment understates the economic potential of the Kwanika project because it does not reflect the positive impact of targeting higher-grade mineralization within the current mineral resource.

Drill hole K-25-271 intersected the up-dip extension of the Central Zone shallower than expected, potentially filling a 100-metre gap in the mineralization between the Pit and Central Zones. The hole also extended the Western Zone down-dip beyond the company’s expectations, confirming that mineralization remains open both laterally and at depth for further expansion. The hole extended the low-grade mineralization around the Pit Zone by roughly 30 metres towards the west, indicating possible increases to open pit mineral resources.

Drill hole highlights include:

Pit Zone:

48.2 metres of 0.31 % Cu, 0.11 g/t Au (0.42% CuEq) from 77.8 metres

Central Zone:

28.5 metres of 0.70 % Cu, 0.60 g/t Au (1.26% CuEq) from 139.5 metres, and 34.8 metres of 1.03 % Cu, 1.26 g/t Au (2.18% CuEq) from 191.1 metres, including: 2.8 metres of 0.60 % Cu, 0.49 g/t Au (1.06% CuEq) from 191.1 metres, and 27.7 metres of 1.23 % Cu, 1.53 g/t Au (2.63% CuEq) from 198.2 metres

Western Zone:

13.0 metres of 0.19 % Cu, 0.53 g/t Au (0.77% CuEq) from 507.0 metres, and 22.3 metres of 0.37 % Cu, 0.35 g/t Au (0.71% CuEq) from 611.8 metres

The current drill program is designed to focus on defining higher-grade zones within the current mineralization that targets grades of roughly 1.5-2.5 times those grades incorporated in the 2023 PEA, according to the company. The 6,435 metre drill program was completed in October. Results from the remaining fifteen holes are pending.

CEO of NorthWest, Paul Olmsted, said results from the third hole continue to build on the excellent results reported in October on the higher-grade copper-gold zones at Kwanika. He added that the company looks forward to reporting on the remaining holes from the 2025 drill program and receiving results from its metallurgical program before the end of the year.

VP Business Development and Exploration of NorthWest, Geoff Chinn, added that hole K-25-271, continues to show support for structural controls on higher-grades. He added that results to date strengthen their confidence in their vision of higher-grade zones within the current mineral resource with a view to targeted grades 1.5-2.5 times the current 1.0% CuEq underground mineral resource.

The company announced a target model on April 10, 2025, for refining the strategy for its flagship Kwanika project. The approach was designed to better evaluate geological controls on zones targeted to grade between 1.5% to 2.5% CuEq over significant combined thicknesses. The strategy also aims to expand on near-surface mineralization to support increases to open pit mineral resources and a revised mine design.

The higher-grade, potentially interconnected zones comprising the Target Model include Pit, Central and Western Zones. These zones host two broad mineralized intervals separated by late dykes, with the combined thicknesses of the intervals targeted at a sizable 30 to 45 metres.

Drilling was designed to validate, infill and expand on the company’s understanding of the structural controls on the higher-grade copper-gold mineralization within the Target Model. The diamond drill program was designed to intersect both the east dipping Central Zone and the north dipping Western Zone beneath it.

Drilling intersected low-grade copper-gold mineralization surrounding the Pit Zone that extends mineralization towards the west by approximately 30 metres, returning 0.31% Cu, 0.11g/t Au, and 1.45 g/t Ag (0.42 % CuEq) over 48.2 metres with unknown true width starting at 77.8 metres.

The hole then intersected the upper part of the Central Zone about 50 metres higher than expected, indicating that mineralization may be deflecting eastwards towards higher-grades areas in the Pit Zone. This could extend continuous higher-grade mineralization between the Central Zone and the Pit Zone, expanding higher-grade zones by about 100 metres. The upper Central Zone intersection returned 0.70% Cu, 0.60g/t Au, and 2.78 g/t Ag (1.26 % CuEq) over 28.5 metres with an estimated true thickness of 16.3 metres starting at 139.5 metres.

The hole then intersected the lower part of the Central Zone, successfully infilling an area tested previously by widely spaced, low angle holes. Drill results confirm a broad, continuous zone of higher-grade copper-gold mineralization consistent with the company’s Target Model, returning 1.03 % Cu, 1.26 g/t Au, and 3.29 g/t Ag (2.18 % CuEq) over 34.8 metres with an estimated true width of 19.9 m starting at 191.1 metres.

Well below the Central Zone, the hole intersected two mineralized intervals within the Western Zone, extending these zones down-dip and laterally. The lenses remain open for further expansion, returning 0.19 % Cu, 0.53 g/t Au, and 0.93 g/t Ag for 0.77% CuEq over 13.0 m with an estimated true width of 8.9 m starting at 507.0 m, includes dilutive late dykes, and 0.37 % Cu, 0.35 g/t Au, and 2.45 g/t Ag for 0.71% CuEq over 22.3 m with an estimated true width of 15.2 m starting at 611.8 m.

Drilling at Kwanika in 2025 was designed and supervised by NorthWest, implemented by InData Geoscience with assay QA/QC checks by Explore Geosolutions. The samples were sealed on site and shipped to Activation Laboratories Ltd. in Kamloops BC.

Technical aspects of this news release have been reviewed, verified, and approved by Geoff Chinn, P.Geo., VP Business Development and Exploration for NorthWest, who is a qualified person.

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.

Paul Olmsted, CEO of NorthWest Copper

For further information, please contact:

416-457-3333

info@northwestcopper.ca

Source: NorthWest Copper Corp.