Mr. Sam Leung reports

ALDEBARAN ANNOUNCES THE FORMATION OF CENTAURI MINERALS AND COMPLETION OF C$5.7 MILLION SEED FINANCING

Aldebaran Resources Inc. has officially launched of Centauri Minerals Inc., the previously announced new Aldebaran spinout company formed to initially focus on exploration in northern Argentina (see the company's news release dated Sept. 5, 2025). In addition, Aldebaran and Centauri are pleased to report that a private seed financing round of $5.7-million has been completed to execute exploration programs and administrative preparations for an initial public offering or go-public transaction in 2026.

Sam Leung, chief executive officer and director of Centauri, commented: "I am honoured and excited to lead the new Centauri Minerals with the support of the Aldebaran team. The outstanding investor interest for this venture has reinforced our plans to conduct modern exploration programs on this unique portfolio of dormant projects in a mining region of increasing global interest. The completion of this oversubscribed private seed financing round allows us to get to work immediately, commencing exploration programs to evaluate and select new drill targets at Rio Grande and Aguas Calientes, solidifying our management team, and commercial preparations to become a public company in 2026. On behalf of our team, I want to thank the Centauri seed round investors for their trust and participation as co-founders in this new venture, many of whom are long-time investors and colleagues in companies we have advanced together. I am also pleased to welcome Altius Minerals as an investor in Centauri, a renowned investment group with a plus-25-year record of supporting successful new exploration ventures."

Centauri project highlights

Centauri is initially focusing on copper, gold and silver exploration in Argentina with a portfolio of six exploration projects spanning over 43,000 hectares located in Salta, Jujuy and Catamarca provinces.

Rio Grande: The most advanced project with near-surface, open-pittable resources totalling 71 million tonnes of 0.30 per cent copper, 0.36 gram per tonne gold and 3.2 grams per tonne silver in the indicated category and 41 million tonnes of 0.23 per cent copper, 0.28 gram per tonne gold and 2.8 grams per tonne silver in the inferred category. In addition, well-mineralized porphyry dikes have been intercepted beneath the current resource, with the best intercepts returning 257.2 metres of 0.53 per cent copper and 1.20 grams per tonne gold. Rio Grande is located in Salta province, approximately nine kilometres from the Lindero gold-copper mine owned by Fortuna Mining Corp. The project also owns valuable support infrastructure, including an active airfield located between the project and the Lindero mine, which is currently being utilized by the mine. Drilling at the project was last completed in 2012 with a National Instrument 43-101 technical report completed by Roscoe Postle Associates Inc. (now SLR Consulting Ltd.) in 2018, under much lower metal price assumptions and years before the nearby Lindero mine began operations in 2020. Several priority drill targets remain untested and more sophisticated modern geophysical and geochemical techniques have yet to be utilized at the project.

Aguas Calientes: The project contains abundant and well-mineralized surface boulders with high concentrations of gold and silver along a 6-kilometre strike length. Aguas Calientes is located in Jujuy province and is approximately 35 kilometres from the town of San Antonio de los Cobres, a major mining industry service hub in Salta. Limited drilling was completed in 2019, which intersected some mineralization, but more importantly, confirmed epithermal structures that are expected to assist in future targeting and drilling programs. The source of the high-grade boulders has yet to be found, and drill permits are still active.

Earlier-stage projects: The remaining portfolio contains four greenfield exploration projects with limited historical work completed but with prospectivity for copper, gold and/or silver, including: El Camino (Salta), Oscara (Salta), La Frontera (Catamarca) and Catua (Jujuy). These projects have not been worked or re-evaluated for many years, but the mineral concessions have been held in good standing through Aldebaran and predecessor companies.

Value to Aldebaran shareholders

Aldebaran intends to distribute its shares of Centauri to Aldebaran shareholders upon a go-public event for Centauri. Aldebaran may elect to distribute the Centauri shares all at once or in stages and may retain a minority interest in Centauri. The formation of Centauri will allow Aldebaran shareholders to maintain their exposure to the Altar copper-gold project in San Juan, Argentina, while also receiving additional value through shares in Centauri.

Formation of Centauri Minerals and seed financing

Centauri is currently a Canadian subsidiary of Aldebaran. Aldebaran and Centauri have executed a definitive transfer agreement, pursuant to which Centauri will acquire all of the shares of Aldebaran Argentina SA and Minera El Toro SA, the subsidiaries owned by Aldebaran that hold the portfolio of Argentine projects. In exchange, Aldebaran will receive 40 million common shares (78.1 per cent) of Centauri, and the balance will be owned by the seed round investors. The transfer is subject to certain conditions and closing is expected to occur in Q4 2025. Pursuant to the non-brokered seed round financing, Centauri has issued 11.38 million shares at 50 cents per share to new investors for a total capital raise of $5.69-million.

Centauri is currently governed by a three-member board of directors, which includes Mark Wayne (chief financial officer and director of Aldebaran), Javier Robeto (vice-president and Argentina country manager of Aldebaran), and Sam Leung (chief executive officer of Centauri). An exploration advisory committee has been formed to assist in the development of new exploration programs as well as to ensure project continuity from historical work; the first two members of this committee are Dr. Kevin B. Heather (chief geological officer and director of Aldebaran) and John Black (chief executive officer and director of Aldebaran).

Centauri is in active discussions with candidate additions to the board of directors, exploration advisory committee and the management team. Announcements are expected as the company progresses toward its go-public goal in 2026.

Next steps and priorities

The completion of the seed financing round allows Centauri to immediately activate its exploration and commercial programs in parallel. Key initiatives and priorities include:

• Technical report update -- already in discussions with independent consultants to complete update of National Instrument 43-101 technical report for the Rio Grande project in preparation for go-public requirements;
• Human resources -- led by Mr. Leung, Centauri will build out a management and exploration team with a strong emphasis on in-region technical and cultural experience to advance the exploration portfolio;
• Geophysical and geochemical field programs -- the Centauri team is actively considering and will select several state-of-the-art geophysical and geochemical technologies that could be advantageously applied to Rio Grande and Aguas Calientes to increase the probability of future drilling success; members of the Centauri team have extensive experience with these modern tools within Argentina and across the Americas, including a network of reputable service providers;
• Administration in Argentina -- completion of subsidiary and project portfolio transfers and filings with regulators as well as renewal of drill permit for the Rio Grande project expected in 2026;
• Go-public plan -- Centauri has begun work on its plan to become a public company in 2026, with a focus on commercial and legal requirements as well as investor and social media strategy.

Qualified person

The scientific and technical data contained in this news release have been reviewed and approved by Dr. Kevin B. Heather, BSc (honours), MSc, PhD, FAusIMM, FGS, chief geological officer and director of Aldebaran, who serves as the qualified person under the definitions of NI 43-101.

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 world-class 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 Independent Mining Consultants of 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).

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