Casa Minerals Commences Inaugural Diamond Drilling at the Arsenault Copper-Gold-Silver Project, British Columbia

Casa Minerals Inc. has commenced its inaugural diamond drilling program at the Arsenault copper-gold-silver VMS project in northern British Columbia, marking the first modern drill testing of the property by the company. The initial hole is collared over a high-priority geophysical anomaly identified by a 2025 Alpha IP survey, targeting a sub-vertical feature with strong chargeability and low-to-moderate resistivity coincident with an interpreted fault or contact.

Drilling is conducted under a five-year exploration permit issued in June 2024, which allows for up to 80 line-kilometres of ground geophysical surveying and drilling from 30 helicopter-accessed sites. Consultation with Teslin-Tlingit and Taku River Tlingit First Nations has been completed. QA/QC is supervised by a Qualified Person, Mr. Erik Ostensoe, P.Geo., with core samples sent to an independent ISO-certified laboratory.

Historic rock assays from the VMS1 zone reported up to 1.74% Cu, 0.98 g/t Au, and 24.1 g/t Ag, though these figures were unverified by a QP. Casa holds an option to acquire a 75% interest in the Arsenault Property.

Casa Minerals Inc. (CASA) has begun drilling, a logical progression following the February 2026 announcement of its aggressive 2026 exploration strategy and the completion of the 2025 3D IP survey. The announcement provides no assay results or resource implications, marking it as a purely operational milestone. The news does not alter the company's financial position or near-term cash requirements, confirming that management is executing on previously disclosed plans. Given the exploratory nature of the activity and the lack of immediate financial or geological data, the market impact is expected to be minimal to neutral in the short term.

Casa Minerals Inc. (CASA) is an exploration-stage mining company focused on advancing two primary assets: the Arsenault Copper-Gold-Silver VMS project in British Columbia and the Congress Gold Mine project in Arizona. The company holds an option to acquire a 75% interest in Arsenault and a 90% interest in Congress.

The business model is entirely exploration-driven, with no revenue, production, or proven reserves. All activities are funded through equity financings and warrant exercises. The company has faced regulatory compliance challenges, including a Management Cease Trade Order (MCTO) in May-June 2026 due to delayed filings, which has since been resolved.