Aldebaran Reports 936 m of 0.66% CuEq (0.62% Cu, 0.09 g/t Au and 1.16 g/t Ag), including 194 m of 0.99% CuEq (0.92% Cu, 0.19 g/t Au and 1.02 g/t Ag) at the Altar Copper-Gold Project in San Juan Argentina

• On 9 Apr 2026 Aldebaran released assay results from five infill holes at the Altar copper‑gold project (San Juan, Argentina).
• The flagship hole (ALD‑26‑1049EXT) returned 936 m @ 0.66 % CuEq, including a standout 194 m interval at 0.99 % CuEq. Other holes delivered long intervals of 0.29–0.84 % CuEq over lengths up to 1.35 km.
• The drill program is the latest phase of an infill campaign aimed at converting inferred resources to Measured & Indicated (M&I) ahead of an updated Mineral Resource Estimate (MRE) slated for Q3‑2026 and a Pre‑Feasibility Study (PFS) targeted for Q2/Q3‑2027.
• Technical work is being overseen by SRK (lead MRE consultant), Knight Piesold (PFS subcontractor) and Whittle (mine‑plan optimisation).
• The company also noted progress on the Argentine RIGI tax‑incentive filing, now extended to July 2027.

• De‑risking: High‑grade, long‑continuous CuEq intervals directly support the resource upgrade pathway. Moving material from inferred to M&I materially reduces project risk and improves valuation multiples.
• Timing: The results arrive on schedule for the Q3‑2026 MRE, meaning no delay in the development timeline—a positive catalyst that the market had anticipated but not yet confirmed.
• Capital efficiency: No additional financing is required for this drill phase; proceeds from earlier private placements ($45 M total) already fund the pre‑feasibility work. The news therefore strengthens the balance sheet narrative without dilutive impact.
• Market perception: Prior to this release, investors were aware of an infill program but lacked concrete high‑grade data. The disclosed grades are materially better than earlier averages (≈0.4 % CuEq), likely prompting a re‑rating of the project’s economics and supporting a price uptick.

Overall, the news is materially positive because it provides new, substantive technical evidence that materially advances the Altar project toward a higher‑certainty resource base and an imminent PFS.

• Aldebaran Resources Inc. focuses on copper‑gold projects in Argentina.
• Flagship: Altar copper‑gold project (San Juan Province) – 80 % owned, with a joint‑venture partner Sibanye Stillwater (20 %). The project hosts a large open‑pit resource (~2.4 Mt M&I Cu at ~0.5 % CuEq) and is slated for a PFS in 2027.
• Other assets: Rio Grande gold‑copper project (Salta Province) transferred to the spin‑out Centauri Minerals; several early‑stage exploration targets (Aguas Calientes, El Camino, etc.).