Jaguar Uranium Corp. (NYSE American: JAGU) is pleased to announce an independent Mineral Resource Estimate for its 100%-owned flagship Laguna Salada Uranium-Vanadium Project, located in Chubut Province, Argentina. The MRE was prepared in accordance with the disclosure requirements of Subpart 1300 of Regulation S-K of the U.S. Securities and Exchange Commission and National Instrument 43-101 – Standards of Disclosure for Mineral Projects. The Mineral Resource Estimate was prepared by independent geological consulting firms Caracle Creek Chile SpA and Atticus Geoscience Consulting Ltd., with an effective date of October 5, 2026. All dollar values are in USD.

• Large-Scale, Bulk-Tonnage, Near-Surface Potential Uranium-Vanadium Resource:
  • 4.2 million lbs. of Indicated and 10.1 million lbs. of Inferred U₃O₈
  • 31.1 million lbs. of Indicated and 57.3 million lbs. of Inferred V₂O₅
  • Includes 21.1 Mt Indicated at 119 ppm U₃O₈ Eq¹. and 34.0 Mt Inferred at 170 ppm U₃O₈ Eq¹.
• Mineral Resource Footprint Covers Approximately 4.3% of Jaguar’s 210,284 ha Laguna Salada Project, Highlighting Significant Potential for Resource Expansion.
• Potential Western Supply of Reliable Critical Minerals: Offers the U.S. and allied markets a secure source of uranium and vanadium in the Western Hemisphere.
• Permitted for Exploration Advancement and Expansion Potential: Priority work program to undertake targeted infill pitting/trenching and sonic drilling.
• Well-Financed, Cash-Rich Balance Sheet: Company maintains nearly US$18 million in cash and no debt

Figure 1. Laguna Salada U-V Project, Chubut Province, Argentina

Figure 2. Isometric View – General Geology of the Laguna Salada U-V Project.

Figure 3. Plan View – General Geology of the Laguna Salada U-V Project.

Figure 4. Interpreted Lithological Section – Laguna Salada U-V Project (see Figure 3).

Figure 5. Overview of Laguna Salada Modelling – Distribution of U₃O₈ (25 ppm U threshold).

Figure 6. Plan View – Laguna Salada Mineral Resource Model (Indicated & Inferred).

“The completion of this independent Regulation S-K 1300 compliant Mineral Resource Estimate marks a landmark milestone for Jaguar Uranium as we quantify the significant scale of Laguna Salada with this resource estimate representing only about 4% of the total Project area,” said Steven Gold, Chief Executive Officer of Jaguar Uranium Corp. “Laguna Salada represents one of the largest potential undeveloped surficial uranium-vanadium deposits in South America, at a time of growing political support for new Western sources of critical and energy metals. Its favorable beneficiation characteristics may allow us to upgrade the raw gravel into a high-grade fine fraction, potentially supporting an efficient, low-impact development pathway in an established mining region.”

Mineral Resource Statement

The Mineral Resource Estimate has been prepared in accordance with Regulation S-K 1300 and the CIM Definition Standards for Mineral Resources and Mineral Reserves adopted by NI 43-101. Mineral Resources are reported using a Net Smelter Return cut-off value of US$12.08/t and satisfy the applicable requirement for reasonable prospects of economic extraction based on the assumptions summarized in the notes to Table 1. MRE is effective October 5, 2026.

Table 1: Mineral Resource Statement for the Laguna Salada Uranium-Vanadium Deposit.

Location, Geology and Mineralization

The Laguna Salada deposit is a district-scale, near-surface, surficial uranium-vanadium asset covering 28 mining concessions over 210,284.45 hectares in central Patagonia (Figure 1). Mineralization occurs as shallow, tabular, caliche-style gravels and unconformity-hosted zones that could be amenable to low-cost open-pit extraction and physical beneficiation. The potential mining and processing methods, costs, environmental effects and economic viability of the Mineral Resources have not been established and will require further technical studies.

Uranium-vanadium mineralization at Laguna Salada occurs in unconsolidated gravels of the Pampa de Arroqui Formation, in unconsolidated gravels of the Gran Laguna Salada Formation, and near the unconformity between Quaternary strata and the underlying substratum, including sandstones and pelite of the Salamanca Formation and sandstones and conglomerates of the Puesto Manuel Arce Formation (Figure 2). The principal uranium-vanadium mineral recognized at Laguna Salada is carnotite, which commonly occurs as yellow-green powdery or finely crystalline material within the sandy matrix of the gravel, as partial rims on sand grains and clasts, and locally as staining within carbonate-cemented matrix material.

Three principal styles of uranium-vanadium mineralization are recognized on the Project: near-surface, tabular, caliche-style uranium-vanadium mineralization in unconsolidated sandy gravel at Guanaco and Lago Seco; unconformity-related uranium-vanadium mineralization at Buried Lake; and volcanic-hosted uranium-vanadium mineralization at La Rosada. The principal Mineral Resource areas are Laguna Salada, historically referred to as Lago Seco, Pampa de Arroqui, historically referred to as Guanaco, and Buried Lake (Figure 3 and Figure 4).

Upcoming Work Program

Jaguar is targeting a work program designed to upgrade Inferred resources and expand mineralization across open target areas:

1. Pampa de Arroqui & Laguna Salada Infill: Excavation of approximately 250 new surface pits and trenches to achieve 200 m to 100 m grid coverage.
2. Buried Lake Sonic Drilling: Completion of 1,500 metres of sonic/vibrosonic drilling (about 100–150 drill holes) to recover intact, representative core across the unconformity-hosted domain.
3. Metallurgical & Field Studies: Representative sampling for bench-scale beneficiation/vanadium recovery optimization, environmental baseline monitoring, and updated MRE modeling.

Drilling, Sampling & Analytical Protocols

The Mineral Resource Estimate was primarily defined using data from 2,146 historical pits and trenches comprising whole, screened and paired samples. The Qualified Persons considered conventional drilling unsuitable for primary grade estimation because poor core recovery and preferential loss of fine-grained carnotite-bearing matrix may bias samples from the loose gravel host. Data from 57 historical reverse-circulation holes were used only to support interpretations of subsurface geological continuity because air-flushing may have biased the samples. Historical pit and trench sampling generally comprised continuous vertical sidewall channel samples that were analyzed either as whole samples or after screening to the less-than-one-quarter-inch fraction. Sample preparation and analysis were conducted by Alex Stewart Assayers and ALS Chemex using four-acid digestion and ICP-OES, ICP-AES or ICP-MS methods, with an over-limit method used for samples above 10,000 ppm. Area-specific regression formulas were used to convert screened results to estimated in-situ grades, and blocks estimated from derived grades were classified only as Inferred Mineral Resources.

Resource Estimation Methodology

The resource estimation workflow (see Figure 5) was executed using an integrated software suite (Geobank™, Leapfrog Geo™, Micromine™, Leapfrog Edge™, and Datamine NPV Scheduler) across three flat-lying hard-bounded domains: Pampa de Arroqui, Laguna Salada, and Buried Lake. Defined at a 25 ppm uranium threshold, the 3D domain wireframes were modeled using an unrotated block model (100 m x 100 m x 1 m) with sub-blocking down to 25 m x 25 m x 0.25 m to accurately resolve thin 1-4 m mineralized horizons. After compositing on a per-sample-location basis, domain-specific high-grade top-cuts were applied to U₃O₈ (ranging from 290 ppm at Laguna Salada to 1,110 ppm at Buried Lake, affecting <1.5% of data), while V₂O₅ required no capping due to low variability. Grade estimation was carried out using Ordinary Kriging in a strict 2D planar framework (dip 0°, azimuth 0°) validated against Nearest Neighbor models, utilizing Quantitative Kriging Neighborhood Analysis to define multi-pass search radii for classifying Indicated resources (Pass 2) and Inferred resources (Pass 3), followed by a 5,000 m global fill pass for unclassified volume (Figure 6).

Cut-Off Grade & Sensitivity Analysis

The MRE is reported at a NSR cut-off value of US$12.08/t, which is equivalent to a U₃O₈-only economic cut-off of approximately 100 ppm U₃O₈ derived from reference prices of US$84.00/lb. U₃O₈ and US$5.30/lb. V₂O₅ calculated from an open-pit operating scenario assuming US$2.00/t mining cost, US$9.00/t processing cost, US$2.50/t general and administrative costs, and 5% dilution. Grade-tonnage sensitivity evaluations demonstrate variable responsiveness across the three Project domains.

Overall, the sensitivity analysis indicates that the effect of changing the reporting threshold varies between the three mineralized areas. Pampa de Arroqui shows the strongest grade-tonnage response around the selected reporting case, followed by Laguna Salada, while Buried Lake shows a comparatively flatter response. In all three areas, lower equivalent U₃O₈ prices correspond to higher NSR cut-offs, resulting in lower retained tonnage and generally higher average U₃O₈ grades.

Qualified Persons

The scientific and technical information in this news release relating to the technical reporting of the Mineral Resource Estimate has been reviewed and approved by independent Qualified Persons Dr. Scott Jobin-Bevans (P.Geo., Ph.D., PMP) of Caracle Creek Chile SpA and Caracle Creek International Consulting Inc. and Simon J.A. Mortimer (FAIG #7795, M.Sc.) of Atticus Geoscience Consulting Ltd. Each is a Qualified Person as defined by NI 43-101 and Regulation S-K 1300. The Qualified Persons have reviewed and verified the relevant data supporting the Mineral Resource Estimate, including the sampling, analytical and test data, and have found the data adequate for the purposes of the disclosure.

Additional scientific and technical content in this news release has been reviewed and approved by C. Gustavo Fernandez, P.Geo., a consultant to the Company and a Qualified Person as defined under Regulation S-K 1300 and NI 43-101.

A Technical Report to support the MRE and prepared in accordance with NI 43-101 will be filed on SEDAR+ within 45 days of this news release and a Technical Report Summary in support of the MRE and prepared in accordance with Regulation S-K 1300 will be filed with the SEC as an exhibit to the applicable SEC filing.

About Jaguar Uranium

Jaguar Uranium Corp. is a South America-focused uranium exploration company advancing a portfolio of prospective brownfield projects across Argentina and Colombia. In Argentina, Jaguar is advancing the Laguna Salada Project in Chubut Province and the historic Huemul uranium mine in Mendoza Province. Anchored by a former producing mine, a historic uranium district and exploration projects supported by historical drilling, the Company is focused on advancing and expanding uranium opportunities across the region. The Company’s Berlin Project in Caldas Province, Colombia is a district-scale, sedimentary-hosted polymetallic system historically reported to host uranium alongside rare earth elements, vanadium, nickel, phosphate, molybdenum, rhenium and zinc. Jaguar completed a $25 million initial public offering on NYSE American in February 2026 and is led by an experienced team with backgrounds in exploration, permitting, project development and mining finance in South America.

www.jaguaruranium.com