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

About this update from Aldebaran Resources Inc

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 VANCOUVER, British Columbia, April 09, 2026 (GLOBE NEWSWIRE) -- Aldebaran Resources Inc. (“Aldebaran” or the “Company”) (TSX-V: ALDE, OTCQX: ADBRF) is pleased to provide results of five holes from the infill drilling program at the Altar project in San Juan, Argentina. The goal of these holes was to upgrade resource blocks classified as Inferred to the Measured & Indicated categories. Highlights ALD-26-049EXT 936.00 m of 0.66% CuEq from 130 m depth Including 94 m of 0.79% CuEq from 138 m depthIncluding 352 m of 0.84% CuEq from 264 m depth Including 194 m of 0.99% CuEq from 346 m depth Including 87 m of 0.77% CuEq from 976 m depth ALD-26-159EXT 1,048 m of 0.40% CuEq from 260 m depth Including 490 m of 0.52% CuEq from 260 m depth Including 216 m of 0.70% CuEq from 262 m depth ALD-26-171EXT 1,353 m of 0.29% CuEq from 70 m depth Including 274 m of 0.36% CuEq from 831 m depth ALD-26-175EXT 1,270 m of 0.29% CuEq from 74 m depth ALD-26-021EXT 190 m of 0.22% CuEq from 26 m depth164 m of 0.29% CuEq from 928 m depth John Black, Chief Executive Officer of Aldebaran, commented: “The 2025-2026 infill drilling program is well underway, and the results today demonstrate the consistency of mineralization at the Altar project. These holes will provide valuable information as we move toward a resource update and pre-feasibility study.” Kevin B. Heather, Chief Geological Officer of Aldebaran, commented: “The current 2025-2026 infill drilling program, along with the 2024-2025 infill program, are critical for mineral resource conversion from the Inferred to the Measured and Indicated categories; neither of which are reflected in the current 2024 mineral resource estimate. Only Measured and Indicated resource blocks can be considered in a prefeasibility study and for the first time in the history of the Altar project, we will be declaring Proven and Probable reserves, which is a significant step in the derisking process for the project.” Table 1 below shows detailed assays for all five holes. Figure 1 displays a plan map of the completed drill hole locations, while Figures 2 to 5 display cross sections of the hol...

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