Mr. Ben Cherrington reports

ALDEBARAN AND CENTAURI FILE MINERAL RESOURCE UPDATE ON THE RIO GRANDE GOLD-COPPER PROJECT ON SEDAR+

Aldebaran Resources Inc. and Centauri Minerals Inc. have filed on SEDAR+ an updated technical report and mineral resource estimate on the Rio Grande gold-copper project in Salta, Argentina, 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 by the company and will be posted on the company's website.

Qualified person's statement

The updated mineral resource estimate was prepared by Benjamin Sanfurgo, FAusIMM, ChMC, SLR managing principal geologist. Mr. Sanfurgo is an independent qualified person 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.

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-per-cent 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 Pachon (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. and based on the drilling completed up to and including the 2023-2024 field season (independent technical report prepared by IMC, Tucson, Ariz., titled "Technical Report, Estimated Mineral Resources, Altar Project, San Juan Province, Argentina," dated Dec. 31, 2024 -- see news release dated Nov. 25, 2024). In October, 2025, the company announced a preliminary economic assessment for Altar, prepared by SRK Consulting Inc. (independent technical report prepared by SRK, titled "NI 43-101 Technical Report Preliminary Economic Assessment, Altar Project, San Juan, Argentina," dated Sept. 30, 2025 -- see news release dated Oct. 30, 2025).

About Centauri Minerals Inc.

Centauri is a new mineral exploration company focused on northern Argentina, a mining region of increasing global significance. Centauri holds a 100-per-cent interest in a portfolio of exploration projects spanning over 43,000 hectares in the provinces of Salta, Catamarca and Jujuy, which was spun out from Aldebaran Resources. The most advanced is the Rio Grande gold-copper project located in Salta, which has an independent National Instrument 43-101-compliant mineral resource estimate that highlights significant gold and copper quantities. Centauri has offices and facilities in Salta, Argentina, and Vancouver, Canada. It is currently a private company majority owned by Aldebaran Resources with plans to become a public company in 2026.

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