Aldebaran Resources and Centauri Minerals File Mineral Resource Update on the Rio Grande Gold-Copper Project on SEDAR+

About this update from Aldebaran Resources Inc

VANCOUVER, British Columbia, April 16, 2026 (GLOBE NEWSWIRE) -- Aldebaran Resources Inc. (“Aldebaran” or the “Company”) (TSX-V: ALDE, OTCQX: ADBRF) and Centauri Minerals Inc. (“Centauri”) are pleased to announce the filing on SEDAR+ of an updated Technical Report and Mineral Resource Estimate on the Rio Grande gold-copper project in Salta, Argentina (the “Rio Grande MRE”), prepared in accordance with National Instrument 43-101 – Standards of Disclosure in Mineral Projects. The Rio Grande MRE has an effective date of April 13, 2026, and was completed by SLR Consulting (Canada) Ltd. The report titled “Rio Grande Project Mineral Resource Estimate, Salta Province, Argentina​” has been filed on the SEDAR+ website at www.sedarplus.ca by the Company and will be posted on the Company’s website at www.aldebaranresources.com.  Qualified Person’s Statement The updated Mineral Resource Estimate was prepared by Mr. Benjamin Sanfurgo FAusIMM, ChMC, SLR Managing Principal Geologist. Mr. Sanfurgo is an independent qualified person (“QP”) as defined by NI 43-101. Mr. Sanfurgo has reviewed, verified and approved the technical information related to the Rio Grande MRE in this announcement. For further information or to subscribe to the Centauri news list, please contact: Sam LeungCEO and DirectorCentauri Minerals Inc.Phone: +1 416 206 4187Email: [email protected] Ben CherringtonManager, Investor RelationsAldebaran Resources Inc.Phone: +44 7538 244 208Email: [email protected] About Aldebaran Resources Inc.  Aldebaran is a mineral exploration company that was spun out of Regulus Resources Inc. in 2018 and has the same core management team. Aldebaran holds an 80% interest in the Altar copper-gold project in San Juan Province, Argentina. The Altar project hosts multiple porphyry copper-gold deposits with potential for additional discoveries. Altar forms part of a cluster of porphyry copper deposits which includes Los Pelambres (Antofagasta Minerals), El Pachón (Glencore), and Los Azules (McEwen Copper). In November 2024, the Company announced an updated mineral resource estimate for Altar, prepared by Independent Mining Consultants Inc. (“IMC”) and based on the drilling completed up to and including the 2023-24 field season (independent technical report prepared by IMC, Tucson, Arizona, titled "Technical Report, Estimated Mineral Reso...

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