VANCOUVER, BC, CANADA – September 9, 2026 – Pecoy Copper Corp. (“Pecoy Copper” or the “Company”) (TSXV: PCU; FSE: D5E; OTCQB: PCUUF) is pleased to announce an updated integrated geophysical interpretation following the 2026 drill results and the recently completed Spartan magnetotelluric (“MT”) survey at its 100%-owned Pecoy Copper-Gold-Molybdenum-Silver Project (“Pecoy” or the “Project”) in southern Peru.

The MT survey was completed over the Pecoy Project by Quantec Geoscience Perú S.A.C. between March and April 2026. Measurements were collected at 85 sites across an approximately 3.2 km by 3.4 km survey area at a nominal site spacing of approximately 300 m. The 3D inversion used all MT sites and produced a high-resolution 3D resistivity model. The model uses a 50 m by 50 m horizontal cell size.

Highlights:

• Large MTP-01 geophysical response remains largely untested: approximately 1.2 km wide and approximately 1.0 km in vertical extent within the 3D MT model, with coincident IP chargeability and magnetic responses.
• Historical drilling establishes a mineralized system immediately southeast of MTP-01: PEC-056, PEC-058 and PEC-062 calibrate the broad MTP-02 Cu-Mo/EDM domain, while PEC-063 provides a mineralized step northwest toward MTP-01.
• Recent PEC26-067 strengthens the Northwest vector: 209.0 m grading 0.40% Cu from 15.0 m, including 42.3 m grading 1.01% Cu and 11.1 m grading 1.90% Cu, plus a separate 296.0 m mineralized interval below the historical pit shell. The interpreted MTP-01 core remains largely untested.
• Fourth drill allocated to Northwest/MTP-01: the rig has been allocated to the Northwest/MTP-01 program. Current drilling northward, while additional pads are being prepared for systematic MTP-01 testing across multiple sections and elevations.
• See VRIFY model here: https://vrify.com/decks/23960

For full press release

https://www.pecoycopper.com/news/news-releases/pecoy-copper-defines-large-untested-mtp-01-target-beyond-newly-expanded-northwest-copper-mineralization