NYSE.A: JAGU

Jaguar Uranium Reports Final Copper Assay Results Including up to 8.54% Copper, Potential 4-km Trend Identified from Huemul Uranium-Copper-Vanadium Project

  • Channel and rock chip samples from areas of visible uranium-copper-vanadium mineralization observed at surface returned final assay results for copper (up to 8.54%), uranium (up to 2.27%), silver (up to 708 g/t) and vanadium (up to 1.27%)[1].
  • Sampling of strike extensions along the Uryco/Rosa and Black zone trends has identified a potential 4-kilometre-long trend of copper mineralization exposed at surface
  • One over-limit sample result for uranium (>25,000 ppm) is still pending.

Table 1 Highlights for Cu above 2.0%, based on final assay results at Huemul, include:

Toronto, Canada – August 18, 2026 – Jaguar Uranium Corp. (NYSE-AM: JAGU) (“Jaguar”) is pleased to announce final assay results for copper from its initial rock sampling program (announced on July 20, 2026) at the Huemul Uranium-Copper-Vanadium (U-Cu-V) Project, located in Malargüe, Mendoza Province, Argentina across the more than 27,000-hectare district-scale project. The Company is planning a maiden drill campaign at the project which includes a past producing mine.

Management Commentary

“These results reinforce what drew us to Huemul in the first place. Copper grades as high as 8.54%, paired with strong uranium and vanadium values across multiple target areas, support our view that this historic district has considerable exploration potential. We’re moving quickly toward a maiden drill campaign to test these targets at depth,” said Steven Gold, President & Chief Executive Officer.

A District with Documented Historical Production

The Huemul Project is anchored by Argentina’s first-ever producing uranium mine, commissioned in 1955 and operated continuously until 1975 by the Comisión Nacional de Energía Atómica (CNEA). Historical records report that approximately 130,000 tonnes of mineralized material, historically described as ore, were processed at the Malargüe plant, with reported average head grades of 0.21% uranium, 2.0% copper and 0.11% vanadium (source: Guillermo Rojas, 1999. Distrito Uranìfero Pampa Amarilla, Mendoza. En Recursos Minerales de la Republica Argentina. Pag.1135-1140). The Company has not independently verified the historical production records or historical head-grade information, and such information should not be interpreted as current exploration results, a mineral resource estimate, a mineral reserve estimate or evidence of current economic viability.

The project hosts uranium-copper-vanadium mineralization in a classic sandstone-hosted deposit setting. The broader Malargüe Mining District remains largely untested by modern exploration methods. Based on the presence of a former producing mine, historical exploration data, and the extent of the Company’s land package, management believes the project warrants further systematic exploration.

Sampling Program

Jaguar conducted targeted sampling included outcrop, subcrop, rock chip composite, channel and float samples, across areas of visible surface mineralization. Field observations were generally consistent with the presence of mineralization described in historical reports, particularly around the former Huemul mine, as described previously here. Samples were collected from eight target areas, namely, Huemul Mine, Agua Botada, Uryco, Rosa, Vega Larga, Black Zone, Cerro Mirano and Lucy (Figure 1).

Channel samples were collected over intervals ranging from 50 cm to 280 cm. All samples were packaged and sealed at the project site by Jaguar geologist and transported to ALS in Mendoza, Argentina for analysis using sodium peroxide decomposition method ME-MS89L™. ALS Mendoza is a full-service laboratory and is ISO/IEC 17025 accredited sample preparation and geochemical analysis. ALS Mendoza is independent of Jaguar. 

Jaguar included 6 Blanks and 6 Duplicates as part of the sample submission (200 samples in total) for QA/QC assessment. Blank material performed satisfactorily. Two duplicate samples did not compare well and were subsequently re-analysed. The re-analysis confirmed the original assay values for those samples. The QP considers the QA/QC results satisfactory, and the assay results suitable for disclosure.

Figure 1 Huemul Project Target and Surface Sampling Locations

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Results

Most notably, sampling of strike extensions at the Uryco/Rosa and Black zone trend identified a potential 4-kilometre trend of copper mineralization observed in outcrop, consistent with the scale of the system suggested by historical work.

Selected significant results from the surface sampling with U grades greater than 100 ppm or Cu grades greater than 1.0% are presented in Table 2 below. The 100 ppm U and 1.0% Cu reporting thresholds used for Table 2 are exploration reporting thresholds selected by the Company and should not be interpreted as a cut-off grade, economic threshold, or indication of mineral resources or mineral reserves. A full tabulation of the sample coordinates, sample types and assay results is reported in Appendix 1.

Table 2 Selected significant results U (greater than 100 ppm) or Cu (greater than 1.0%)

Sample IDAg (ppm)Cu (%)U (ppm)V (ppm) Sample IDAg (ppm)Cu (%)U (ppm)V (ppm)
4243110.26810727 433260.793529271
42451060.336132543 4333152.0205238
4246430.816209045 4334381.64014151
4247952.30015545 4335625.78013954
4248131.68510438 4336181.750168102
4252150.07311250 43373721.435102377
4255110.971275147 43406350.15716851005
4257644.040272109 4341<51.4606235
4274140.4182230455 4344<53.82012345
4275140.275201146 4347<51.175329
4276160.692303126 4348134.48020238
4277310.29489702000 435081.0503933
4278321.23554703880 4358122.78016159
4282281.14545111 4359103.6807946
42847081.46042102780 4361192.00027958
4285681.810153373 436271.5957835
4290790.839227009010 4365<58.54022111
42911050.272207007070 4366<54.3302746
4292450.171205007200 4372<52.3502486
4293170.22984003650 437452.2006350
4294120.3055521055 437553.0506043
429550.247117735 43831051.32560112
42961332.040143507270 4384<52.370944
42972120.417152505330 4387770.01724133
4298850.228183007840 4396621.5905582
429950.077165366 43992051.355725150
430060.094116152 4400102.0509430
430180.07517073 4401151.16011049
4302251.240836324 4402231.05510249
430390.19455778 4403273.6607848
4304180.808654296 440491.9209845
4306130.3321165353 4405384.37032051
430890.36819151400 4408215.11024190
4309620.4742880154 440951.7754864
4312110.230309167 4411<50.07526345
4313251.025889147 4414<50.09823438
43192101.620>2500012700 4421361.93510664
4321<50.00816384 4423174.2702664
432470.131242314 442483.1101256
432582.0804548 4425<52.200440
4328<53.3905275      

Notes:

  1. ppm = g/t
  2. 10,000 ppm = 1.0%
  3. Values reported as ‘>25,000 ppm’ exceed the upper detection limit and are subject to over-limit reanalysis; final values may differ.

Huemul Mine / Agua Botada Trend

The Huemul Mine / Agua Botada Trend represents a predominantly uranium-vanadium mineralized zone. Mineralization is hosted in the Diamante Formation sandstones, conglomerates, shales and volcano-clastics striking north south and dipping 20-25° to the west in the north and becoming flat lying to the south.  Recent sampling results appear show the dominance of U over Cu in this area (Figure 3).

Figure 2 Uranium and copper surface sampling results along the Huemul Mine – Agua Botada Trend.

Uryco-Rosa, Black Zone and Vega Larga Trend

The Cerro Mirano, Uryco-Rosa, Black Zone and Vega Larga areas are dominated by Cu-U-V±Ag mineralization. Mapping, rock sampling and gamma surveying have delineated the Uryco-Rosa, Black Zone and Vega Larga target areas, with apparent strike lengths of approximately 2,200 m, 1,300 m and 2,300 m, respectively, hosted along conglomerate and sandstone horizons of the Diamante Formation that collectively define a greater than 4 km corridor of mineralized occurrences. The Cerro Mirano mineralized zone is related to the intrusion of andesitic dikes and is approximately 300 m long. Recent sampling results appear to show the dominance of Cu over U in this area (Figure 3).

Figure 3 Uranium and copper surface sampling results along the Uryco-Rosa, Black Zone and Vega Larga Trend.

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Data Verification

Over-limit samples for copper (indicated as >25000) were re-analysed by ALS using 4 acid digest and ICP finish (ME-OG62™). One over-limit sample for uranium (indicated as >25000) is being re-analysed using XRF for base metal ores by fusion (ME-XRF15b™) and is still pending. Duplicate re-analysis confirmed the original assay results that were received and indicates a potential sample swap, either during project preparation, or at the laboratory. In the opinion of the QP, these issues are not material at this stage of the project but will need closer attention during further work phases.

The QP’s review of the sampling, analytical and QA/QC information disclosed in this news release was limited to a review of information provided by the Company and its consultants, including sample locations, sample descriptions, analytical certificates, analytical methods and QA/QC results. The QP has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures, sample locations, sample security or chain-of-custody procedures. The QP has not independently verified the historical production, historical grade or historical exploration information referenced in this news release. The QP’s review is subject to the limitations described herein, including the selective nature of the samples, pending over-limit reanalysis for certain uranium.

Cautionary Note

The Huemul Project is an exploration-stage property. No mineral resource or mineral reserve estimate has been prepared for the Huemul Project under National Instrument 43-101 — Standards of Disclosure for Mineral Projects (“NI 43-101”) or Subpart 1300 of Regulation S-K. The surface sampling results disclosed in this news release are exploration results only and should not be interpreted as establishing the presence of mineral resources or mineral reserves. Rock chip and channel samples are selective by nature and may not be representative of mineralization across the property.

Historical production, grade and exploration information referenced in this news release is historical in nature and has not been independently verified by the Company or by a qualified person under NI 43-101 or Subpart 1300 of Regulation S-K. The Company is not treating this information as current mineral resources, mineral reserves, or current exploration results. The information is considered relevant because it indicates the presence of uranium-copper-vanadium mineralization on the property, but it should not be relied upon until confirmed by additional exploration work.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by George van der Walt, Pr.Sci.Nat., an independent Principal Consultant with The MSA Group (Pty) Ltd., who is a qualified person under NI 43-101 and Subpart 1300 of Regulation S-K. Mr. van der Walt has reviewed the sampling, analytical and QA/QC information disclosed in this news release on the basis of information provided by the Company and its consultants and has approved the technical disclosure in the form and context in which it appears. Mr. van der Walt has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures or sample chain of custody.

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.

For more information, contact:

Steven Gold, Chief Executive Officer

[email protected]

+1-416-648-4065

www.jaguaruranium.com

Forward Looking Statements

This news release contains “forward-looking statements” within the meaning of applicable U.S. and Canadian securities laws. Forward-looking statements are statements that are not historical facts and include, without limitation, statements regarding: the timing and results of assay data; the interpretation of exploration results; the potential extent, continuity, and significance of observed mineralization; the identification of prospective target areas; the potential for discovery; planned or future exploration programs; and the Company’s expectations regarding the Huemul Project and the broader Malargüe district.

Forward-looking statements are based on a number of material assumptions, including, but not limited to: the accuracy of historical data; the reliability of sampling and field observations; the completion of over-limit reanalysis and any duplicate-sample follow-up without material adverse changes to the preliminary interpretation; the continuity of mineralization observed at surface; the receipt of assay results consistent with expectations; the availability of financing and personnel; the availability of equipment, laboratory capacity, property access and required permits; and the Company’s ability to execute its exploration plans as currently contemplated.

Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those expressed or implied by such statements. These risks and uncertainties include, among others: the risk that assay results or over-limit reanalysis results do not confirm preliminary observations; risks relating to the interpretation of exploration results; risks that duplicate-sample reanalysis or additional QA/QC review may affect the interpretation of results; the possibility that mineralization is not continuous or of economic grade; risks associated with early-stage exploration properties; the selective nature of rock chip, channel, composite, select and mine-dump samples; reliance on historical data that may be incomplete or inaccurate; commodity price volatility; permitting and regulatory risks; operational and technical risks; and general economic, market and industry conditions.

Forward-looking statements speak only as of the date of this news release. Except as required by applicable securities laws, the Company undertakes no obligation to update or revise any forward-looking statements to reflect events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.

APPENDIX 1: Full tabulation of final sample assay results

Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
422624406366042968Outcrop Chip  <50.002360
422724407036042691Subcrop Channel160250<50.002172
422824407036042691Subcrop Channel80250<50.0031177
422924407186042793Outcrop Channel 100<5<0.002387
423024398376043204Outcrop Channel140250<5<0.002210
423124397566042929Outcrop Channel1200<5<0.002148
423224401926043308Outcrop Composite  <5<0.002414
423324401836042783Outcrop Channel200270<5<0.002135
423424401766042580Outcrop Channel120260<50.002236
423524404286042411Outcrop Composite  <5<0.002238
423624404466042469Outcrop Channel110280<5<0.002124
423724404936042537Outcrop Composite  <5<0.002161
423824404366042855Outcrop Composite  <5<0.002250
423924407596042423Outcrop Channel80270<50.0031163
424024406566042568Outcrop Composite  <50.002243
424124407436042595Outcrop Channel80270<50.0031183
424224401966041287Mine Dump  190.1358629
424324401966041287Mine Dump  110.26810727
424424402106041262Mine Dump150280<50.1225840
424524402056041268Mine Dump200151060.336132543
424624402286041289Mine Dump  430.816209045
424724403106041673Subcrop Composite  952.30015545
424824403236041677Mine Dump  131.68510438
424924402476041822Outcrop Composite  <50.009483
425024402446041754Outcrop Composite  <50.004254
425124401796041612Outcrop Composite  <50.005387
425224402086041110Mine Dump  150.07311250
425324402476041081Outcrop Channel120280<50.002436
425424402476041081Outcrop Channel80280<50.002775
425524402406041074Outcrop Channel60270110.971275147
425724402406041074Outcrop Channel110270644.040272109
425924402266041078Outcrop Channel70300<50.0091666
426024402266041078Outcrop Channel80300<50.009948
426124402336041081Outcrop Channel100300<50.0283133
426224402146041079Outcrop Composite  <50.005682
426324402146041079Outcrop Channel80280<50.006857
426424402026041075Outcrop Channel120280<50.0021249
426524402026041075Outcrop Channel100280<50.014631
426624401976041068Outcrop Channel9028050.1406541
426724401976041068Outcrop Channel50270<50.0135104
426824401976041068Outcrop Channel70270<50.005441
426924401046041042Outcrop Composite  <50.002356
427024400736040983Outcrop Channel120280<50.002367
427124401076040952Outcrop Composite  <50.002252
427224399536040953Outcrop Channel120 <5<0.002528
427324399916040998Outcrop Composite  <5<0.002547
427424400196040663Mine Dump150 140.4182230455
427524400326040624Mine Dump180 140.275201146
427624399816040684Mine Dump170 160.692303126
427724399776040682Mine Dump  310.29489702000
427824399706040697Mine Dump  321.23554703880
427924400416040718Outcrop Composite  <50.0105766
428024400596040708Outcrop Channel23030<50.05845124
428124400616040715Outcrop Channel20030170.8204399
428224400606040718Outcrop Channel2000281.14545111
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
428324400636040718Outcrop Channel2000300.81574418
428424400646040722Outcrop Channel20007081.46042102780
428524400626040724Outcrop Channel2000681.810153373
428824400626040720Outcrop Channel2000330.68655114
428924400626040726Outcrop Channel2000240.92591117
429024400616040729Outcrop Channel2000790.839227009010
429124400616040730Outcrop Channel20001050.272207007070
429224400606040732Outcrop Channel2000450.171205007200
429324400616040735Outcrop Channel2000170.22984003650
429424400636040735Outcrop Channel2000120.3055521055
429524400636040739Outcrop Channel200050.247117735
429624400616040742Outcrop Channel20001332.040143507270
429724400626040744Outcrop Channel20002120.417152505330
429824400666040748Outcrop Channel18090850.228183007840
429924400866040746Subcrop Composite  50.077165366
430024399696040765Mine Dump1509060.094116152
430124401496040367Mine Dump2006080.07517073
430224401276040380Not recorded  251.240836324
430324401056040400Mine Dump2006090.19455778
430424400896040433Mine Dump2000180.808654296
430524400676040431Mine Dump2000<50.03257104
430624400506040415Mine Dump2000130.3321165353
430724400486040411Mine Dump200050.03863103
430824400266040427Mine Dump20013090.36819151400
430924401026040525Mine Dump  620.4742880154
431024400596040485Mine Dump200120<50.0346586
431124400496040444Mine Dump200290<50.0575366
431224400066040439Mine Dump200 110.230309167
431324400156040444Mine Dump  251.025889147
431424400236040479Mine Dump200110<50.0112262
431524400396040509Mine Dump200170<50.0689374
431824400796040521Mine Dump200150<50.0252786
4319(8)24400656040738Outcrop Composite  2101.620>2500012700
432024402416040636Subcrop Composite  <50.0089368
432124402936040594Outcrop Channel28090<50.00816384
432224402036040235Outcrop Composite  <50.0391840
432324399406040265Outcrop Composite  <50.008948
432424401026040482Mine Dump20020070.131242314
432524400506039769Outcrop Composite  82.0804548
432624452636035159Outcrop Composite  <50.006439
432724452706035090Outcrop Composite  26.00.0263298
432824452476035007Outcrop Composite  <53.3905275
432924452506035005Outcrop Composite  <50.0491145
433024487076035962Outcrop Composite  350.4495447
433124487116035963Outcrop Composite  170.1403736
433224440036037410Mine Dump  60.793529271
433324440006037374Outcrop Composite  152.0205238
433424498186037854Outcrop Select  381.64014151
433524497406037990Outcrop Composite  625.78013954
433624496906038031Mine Dump  181.750168102
433724489986038428Outcrop Channel1202703721.435102377
433824490156038412Outcrop Channel110 70.759646
433924448076036267Float Select  <50.007633
434024448156036263Subcrop Select  6350.15716851005
434124450766036272Outcrop Channel150180<51.4606235
434224450806036264Outcrop Channel70180<50.3103074
434324450836036264Outcrop Channel100180<50.013435
434424450906036269Mine Dump2000<53.82012345
434624451816036252Outcrop Channel100180<50.433441
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
434724452496036248Subcrop Channel200240<51.175329
434824460026036256Outcrop Channel160 134.48020238
435024459616036251Outcrop Composite  81.0503933
435124459176036262Outcrop Channel180110<50.9762232
435224458526036280Outcrop Composite  <50.722641
435324457266036259Outcrop Channel100180<50.13931101
435424457236036260Outcrop Channel150180<50.3621032
435524457206036263Outcrop Channel200180<50.533733
435624455236036252Outcrop Channel130240<50.383325
435724454456036254Outcrop Composite  <50.734427
435824454586036301Outcrop Channel180180122.78016159
435924464536036262Outcrop Composite  103.6807946
436024465656036305Outcrop Channel12018090.9265843
436124465446036304Outcrop Channel110180192.00027958
436224465196036288Outcrop Channel17018071.5957835
436324463496036247Mine Dump200120310.99813453
436424463116036238Outcrop Composite  <50.5071829
436524462016036261Outcrop Channel100 <58.54022111
436624470916036238Outcrop Channel150180<54.3302746
436724470786036240Outcrop Channel150180<50.8312547
436824467596036239Outcrop Composite  <50.601625
436924466396036267Outcrop Composite  <50.8361832
437024467986036260Outcrop Composite  <50.04623100
437124471956036214Outcrop Composite  <50.161635
437224479036035889Outcrop Channel120120<52.3502486
437324478246035915Outcrop Composite  <50.339448
437424482676035877Subcrop Select  52.2006350
437524482876035870Subcrop Select  53.0506043
437824463526035774Outcrop Channel15050<50.5593056
437924463476035763Outcrop Channel 30<50.466547
438024461266035620Outcrop Composite  <50.5932246
438124460326035350Outcrop Composite  <50.0043031
438224461466035400Outcrop Channel12040<50.0381954
438324454806035148Outcrop Composite  1051.32560112
438424454906035156Outcrop Composite  <52.370944
438524457746035357Outcrop Composite  240.2175994
438624457706035347Float Select  80.5696242
438724457726035252Outcrop Channel60240770.01724133
438824455676034864Outcrop Composite  130.0653667
438924455226034904Outcrop Channel16020<50.0073347
439024455176034897Outcrop Channel20010<50.0032546
439124475916036155Subcrop Composite  70.2134534
439224482246035655Float Select  <50.096529
439324481876035678Subcrop Select  <50.081838
439424481346035690Float Select  390.4233665
439524481356035316Outcrop Select  260.5696628
439624445906036319Outcrop Channel170180621.5905582
439724446676036313Outcrop Channel80180<50.7012229
439824447166036295Outcrop Channel170180<50.8801840
439924445806036321Outcrop Channel1701802051.355725150
440024501096037912Outcrop Channel150140102.0509430
440124497816037862Outcrop Select  151.16011049
440224497716037840Outcrop Select  231.05510249
440324498276037945Float Select  273.6607848
440424497826037967Outcrop Channel10018091.9209845
440524497806037962Mine Dump200150384.37032051
440824496516038044Outcrop Composite  215.11024190
440924496676038061Float Select  51.7754864
441024464126034546Outcrop Select  <50.1295937
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
441124462026034613Outcrop Channel100200<50.07526345
441224462026034613Outcrop Channel120200<50.0159837
441324462026034613Outcrop Select  <50.0211440
441424459086034400Outcrop Channel170310<50.09823438
441524459086034399Outcrop Channel120310<50.0052051
441624457856034305Outcrop Channel12090<50.0072454
441724457916034307Outcrop Channel1100<50.0061232
441824452046034412Outcrop Channel160160<50.393457
441924452096034419Outcrop Channel1400<50.069528
442024451176034346Subcrop Composite  <50.367152
442124450916034329Float Select  361.93510664
442224450906034328Subcrop Channel10030<50.135231
442324476966041535Outcrop Composite  174.2702664
442424477296041426Outcrop Composite  83.1101256
442524448626043361Outcrop Composite  <52.200440

Notes:

  1. Coordinates Projection: Campo Inchauspe / Argentina 2 (ellipsoid: International 1924)
  2. ppm = g/t
  3. 10,000 ppm = 1.0%
  4. The primary ALS analytical method was “ME-MS89L™”, which is a sodium peroxide decomposition for complete recovery of lithium, rare earths, and associated trace elements.
  5. “<” indicates below lower limit of detection, “>” indicates above upper limit of detection.
  6. Over-limit samples for Cu (>25,000) were analysed using the ALS method “ME-OG62™”, which is uses four acid digestion to break down most silicates and all but the most resistive minerals.
  7. Over-limit samples for U (>25,000) are being analysed using the ALS method “U-XRF15b™”, which is ore grade XRF assay of a sample prepared by fusion with an oxidizing flux.
  8. Over-limit U assay result still pending.

[1] Because sampling was selective and targeted areas of visible mineralization, the results may be biased high and should not be considered representative of grade distribution, continuity or mineralization across the Huemul ProjectOne

  • Channel and rock chip samples from areas of visible uranium-copper-vanadium mineralization observed at surface returned final assay results for copper (up to 8.54%), uranium (up to 2.27%), silver (up to 708 g/t) and vanadium (up to 1.27%)[1].
  • Sampling of strike extensions along the Uryco/Rosa and Black zone trends has identified a potential 4-kilometre-long trend of copper mineralization exposed at surface
  • One over-limit sample result for uranium (>25,000 ppm) is still pending.

Table 1 Highlights for Cu above 2.0%, based on final assay results at Huemul, include:

Toronto, Canada – August 18, 2026 – Jaguar Uranium Corp. (NYSE-AM: JAGU) (“Jaguar”) is pleased to announce final assay results for copper from its initial rock sampling program (announced on July 20, 2026) at the Huemul Uranium-Copper-Vanadium (U-Cu-V) Project, located in Malargüe, Mendoza Province, Argentina across the more than 27,000-hectare district-scale project. The Company is planning a maiden drill campaign at the project which includes a past producing mine.

Management Commentary

“These results reinforce what drew us to Huemul in the first place. Copper grades as high as 8.54%, paired with strong uranium and vanadium values across multiple target areas, support our view that this historic district has considerable exploration potential. We’re moving quickly toward a maiden drill campaign to test these targets at depth,” said Steven Gold, President & Chief Executive Officer.

A District with Documented Historical Production

The Huemul Project is anchored by Argentina’s first-ever producing uranium mine, commissioned in 1955 and operated continuously until 1975 by the Comisión Nacional de Energía Atómica (CNEA). Historical records report that approximately 130,000 tonnes of mineralized material, historically described as ore, were processed at the Malargüe plant, with reported average head grades of 0.21% uranium, 2.0% copper and 0.11% vanadium (source: Guillermo Rojas, 1999. Distrito Uranìfero Pampa Amarilla, Mendoza. En Recursos Minerales de la Republica Argentina. Pag.1135-1140). The Company has not independently verified the historical production records or historical head-grade information, and such information should not be interpreted as current exploration results, a mineral resource estimate, a mineral reserve estimate or evidence of current economic viability.

The project hosts uranium-copper-vanadium mineralization in a classic sandstone-hosted deposit setting. The broader Malargüe Mining District remains largely untested by modern exploration methods. Based on the presence of a former producing mine, historical exploration data, and the extent of the Company’s land package, management believes the project warrants further systematic exploration.

Sampling Program

Jaguar conducted targeted sampling included outcrop, subcrop, rock chip composite, channel and float samples, across areas of visible surface mineralization. Field observations were generally consistent with the presence of mineralization described in historical reports, particularly around the former Huemul mine, as described previously here. Samples were collected from eight target areas, namely, Huemul Mine, Agua Botada, Uryco, Rosa, Vega Larga, Black Zone, Cerro Mirano and Lucy (Figure 1).

Channel samples were collected over intervals ranging from 50 cm to 280 cm. All samples were packaged and sealed at the project site by Jaguar geologist and transported to ALS in Mendoza, Argentina for analysis using sodium peroxide decomposition method ME-MS89L™. ALS Mendoza is a full-service laboratory and is ISO/IEC 17025 accredited sample preparation and geochemical analysis. ALS Mendoza is independent of Jaguar. 

Jaguar included 6 Blanks and 6 Duplicates as part of the sample submission (200 samples in total) for QA/QC assessment. Blank material performed satisfactorily. Two duplicate samples did not compare well and were subsequently re-analysed. The re-analysis confirmed the original assay values for those samples. The QP considers the QA/QC results satisfactory, and the assay results suitable for disclosure.

Figure 1 Huemul Project Target and Surface Sampling Locations

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Results

Most notably, sampling of strike extensions at the Uryco/Rosa and Black zone trend identified a potential 4-kilometre trend of copper mineralization observed in outcrop, consistent with the scale of the system suggested by historical work.

Selected significant results from the surface sampling with U grades greater than 100 ppm or Cu grades greater than 1.0% are presented in Table 2 below. The 100 ppm U and 1.0% Cu reporting thresholds used for Table 2 are exploration reporting thresholds selected by the Company and should not be interpreted as a cut-off grade, economic threshold, or indication of mineral resources or mineral reserves. A full tabulation of the sample coordinates, sample types and assay results is reported in Appendix 1.

Table 2 Selected significant results U (greater than 100 ppm) or Cu (greater than 1.0%)

Sample IDAg (ppm)Cu (%)U (ppm)V (ppm) Sample IDAg (ppm)Cu (%)U (ppm)V (ppm)
4243110.26810727 433260.793529271
42451060.336132543 4333152.0205238
4246430.816209045 4334381.64014151
4247952.30015545 4335625.78013954
4248131.68510438 4336181.750168102
4252150.07311250 43373721.435102377
4255110.971275147 43406350.15716851005
4257644.040272109 4341<51.4606235
4274140.4182230455 4344<53.82012345
4275140.275201146 4347<51.175329
4276160.692303126 4348134.48020238
4277310.29489702000 435081.0503933
4278321.23554703880 4358122.78016159
4282281.14545111 4359103.6807946
42847081.46042102780 4361192.00027958
4285681.810153373 436271.5957835
4290790.839227009010 4365<58.54022111
42911050.272207007070 4366<54.3302746
4292450.171205007200 4372<52.3502486
4293170.22984003650 437452.2006350
4294120.3055521055 437553.0506043
429550.247117735 43831051.32560112
42961332.040143507270 4384<52.370944
42972120.417152505330 4387770.01724133
4298850.228183007840 4396621.5905582
429950.077165366 43992051.355725150
430060.094116152 4400102.0509430
430180.07517073 4401151.16011049
4302251.240836324 4402231.05510249
430390.19455778 4403273.6607848
4304180.808654296 440491.9209845
4306130.3321165353 4405384.37032051
430890.36819151400 4408215.11024190
4309620.4742880154 440951.7754864
4312110.230309167 4411<50.07526345
4313251.025889147 4414<50.09823438
43192101.620>2500012700 4421361.93510664
4321<50.00816384 4423174.2702664
432470.131242314 442483.1101256
432582.0804548 4425<52.200440
4328<53.3905275      

Notes:

  1. ppm = g/t
  2. 10,000 ppm = 1.0%
  3. Values reported as ‘>25,000 ppm’ exceed the upper detection limit and are subject to over-limit reanalysis; final values may differ.

Huemul Mine / Agua Botada Trend

The Huemul Mine / Agua Botada Trend represents a predominantly uranium-vanadium mineralized zone. Mineralization is hosted in the Diamante Formation sandstones, conglomerates, shales and volcano-clastics striking north south and dipping 20-25° to the west in the north and becoming flat lying to the south.  Recent sampling results appear show the dominance of U over Cu in this area (Figure 3).

Figure 2 Uranium and copper surface sampling results along the Huemul Mine – Agua Botada Trend.

Uryco-Rosa, Black Zone and Vega Larga Trend

The Cerro Mirano, Uryco-Rosa, Black Zone and Vega Larga areas are dominated by Cu-U-V±Ag mineralization. Mapping, rock sampling and gamma surveying have delineated the Uryco-Rosa, Black Zone and Vega Larga target areas, with apparent strike lengths of approximately 2,200 m, 1,300 m and 2,300 m, respectively, hosted along conglomerate and sandstone horizons of the Diamante Formation that collectively define a greater than 4 km corridor of mineralized occurrences. The Cerro Mirano mineralized zone is related to the intrusion of andesitic dikes and is approximately 300 m long. Recent sampling results appear to show the dominance of Cu over U in this area (Figure 3).

Figure 3 Uranium and copper surface sampling results along the Uryco-Rosa, Black Zone and Vega Larga Trend.

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Data Verification

Over-limit samples for copper (indicated as >25000) were re-analysed by ALS using 4 acid digest and ICP finish (ME-OG62™). One over-limit sample for uranium (indicated as >25000) is being re-analysed using XRF for base metal ores by fusion (ME-XRF15b™) and is still pending. Duplicate re-analysis confirmed the original assay results that were received and indicates a potential sample swap, either during project preparation, or at the laboratory. In the opinion of the QP, these issues are not material at this stage of the project but will need closer attention during further work phases.

The QP’s review of the sampling, analytical and QA/QC information disclosed in this news release was limited to a review of information provided by the Company and its consultants, including sample locations, sample descriptions, analytical certificates, analytical methods and QA/QC results. The QP has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures, sample locations, sample security or chain-of-custody procedures. The QP has not independently verified the historical production, historical grade or historical exploration information referenced in this news release. The QP’s review is subject to the limitations described herein, including the selective nature of the samples, pending over-limit reanalysis for certain uranium.

Cautionary Note

The Huemul Project is an exploration-stage property. No mineral resource or mineral reserve estimate has been prepared for the Huemul Project under National Instrument 43-101 — Standards of Disclosure for Mineral Projects (“NI 43-101”) or Subpart 1300 of Regulation S-K. The surface sampling results disclosed in this news release are exploration results only and should not be interpreted as establishing the presence of mineral resources or mineral reserves. Rock chip and channel samples are selective by nature and may not be representative of mineralization across the property.

Historical production, grade and exploration information referenced in this news release is historical in nature and has not been independently verified by the Company or by a qualified person under NI 43-101 or Subpart 1300 of Regulation S-K. The Company is not treating this information as current mineral resources, mineral reserves, or current exploration results. The information is considered relevant because it indicates the presence of uranium-copper-vanadium mineralization on the property, but it should not be relied upon until confirmed by additional exploration work.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by George van der Walt, Pr.Sci.Nat., an independent Principal Consultant with The MSA Group (Pty) Ltd., who is a qualified person under NI 43-101 and Subpart 1300 of Regulation S-K. Mr. van der Walt has reviewed the sampling, analytical and QA/QC information disclosed in this news release on the basis of information provided by the Company and its consultants and has approved the technical disclosure in the form and context in which it appears. Mr. van der Walt has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures or sample chain of custody.

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.

For more information, contact:

Steven Gold, Chief Executive Officer

[email protected]

+1-416-648-4065

www.jaguaruranium.com

Forward Looking Statements

This news release contains “forward-looking statements” within the meaning of applicable U.S. and Canadian securities laws. Forward-looking statements are statements that are not historical facts and include, without limitation, statements regarding: the timing and results of assay data; the interpretation of exploration results; the potential extent, continuity, and significance of observed mineralization; the identification of prospective target areas; the potential for discovery; planned or future exploration programs; and the Company’s expectations regarding the Huemul Project and the broader Malargüe district.

Forward-looking statements are based on a number of material assumptions, including, but not limited to: the accuracy of historical data; the reliability of sampling and field observations; the completion of over-limit reanalysis and any duplicate-sample follow-up without material adverse changes to the preliminary interpretation; the continuity of mineralization observed at surface; the receipt of assay results consistent with expectations; the availability of financing and personnel; the availability of equipment, laboratory capacity, property access and required permits; and the Company’s ability to execute its exploration plans as currently contemplated.

Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those expressed or implied by such statements. These risks and uncertainties include, among others: the risk that assay results or over-limit reanalysis results do not confirm preliminary observations; risks relating to the interpretation of exploration results; risks that duplicate-sample reanalysis or additional QA/QC review may affect the interpretation of results; the possibility that mineralization is not continuous or of economic grade; risks associated with early-stage exploration properties; the selective nature of rock chip, channel, composite, select and mine-dump samples; reliance on historical data that may be incomplete or inaccurate; commodity price volatility; permitting and regulatory risks; operational and technical risks; and general economic, market and industry conditions.

Forward-looking statements speak only as of the date of this news release. Except as required by applicable securities laws, the Company undertakes no obligation to update or revise any forward-looking statements to reflect events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.

APPENDIX 1: Full tabulation of final sample assay results

Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
422624406366042968Outcrop Chip  <50.002360
422724407036042691Subcrop Channel160250<50.002172
422824407036042691Subcrop Channel80250<50.0031177
422924407186042793Outcrop Channel 100<5<0.002387
423024398376043204Outcrop Channel140250<5<0.002210
423124397566042929Outcrop Channel1200<5<0.002148
423224401926043308Outcrop Composite  <5<0.002414
423324401836042783Outcrop Channel200270<5<0.002135
423424401766042580Outcrop Channel120260<50.002236
423524404286042411Outcrop Composite  <5<0.002238
423624404466042469Outcrop Channel110280<5<0.002124
423724404936042537Outcrop Composite  <5<0.002161
423824404366042855Outcrop Composite  <5<0.002250
423924407596042423Outcrop Channel80270<50.0031163
424024406566042568Outcrop Composite  <50.002243
424124407436042595Outcrop Channel80270<50.0031183
424224401966041287Mine Dump  190.1358629
424324401966041287Mine Dump  110.26810727
424424402106041262Mine Dump150280<50.1225840
424524402056041268Mine Dump200151060.336132543
424624402286041289Mine Dump  430.816209045
424724403106041673Subcrop Composite  952.30015545
424824403236041677Mine Dump  131.68510438
424924402476041822Outcrop Composite  <50.009483
425024402446041754Outcrop Composite  <50.004254
425124401796041612Outcrop Composite  <50.005387
425224402086041110Mine Dump  150.07311250
425324402476041081Outcrop Channel120280<50.002436
425424402476041081Outcrop Channel80280<50.002775
425524402406041074Outcrop Channel60270110.971275147
425724402406041074Outcrop Channel110270644.040272109
425924402266041078Outcrop Channel70300<50.0091666
426024402266041078Outcrop Channel80300<50.009948
426124402336041081Outcrop Channel100300<50.0283133
426224402146041079Outcrop Composite  <50.005682
426324402146041079Outcrop Channel80280<50.006857
426424402026041075Outcrop Channel120280<50.0021249
426524402026041075Outcrop Channel100280<50.014631
426624401976041068Outcrop Channel9028050.1406541
426724401976041068Outcrop Channel50270<50.0135104
426824401976041068Outcrop Channel70270<50.005441
426924401046041042Outcrop Composite  <50.002356
427024400736040983Outcrop Channel120280<50.002367
427124401076040952Outcrop Composite  <50.002252
427224399536040953Outcrop Channel120 <5<0.002528
427324399916040998Outcrop Composite  <5<0.002547
427424400196040663Mine Dump150 140.4182230455
427524400326040624Mine Dump180 140.275201146
427624399816040684Mine Dump170 160.692303126
427724399776040682Mine Dump  310.29489702000
427824399706040697Mine Dump  321.23554703880
427924400416040718Outcrop Composite  <50.0105766
428024400596040708Outcrop Channel23030<50.05845124
428124400616040715Outcrop Channel20030170.8204399
428224400606040718Outcrop Channel2000281.14545111
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
428324400636040718Outcrop Channel2000300.81574418
428424400646040722Outcrop Channel20007081.46042102780
428524400626040724Outcrop Channel2000681.810153373
428824400626040720Outcrop Channel2000330.68655114
428924400626040726Outcrop Channel2000240.92591117
429024400616040729Outcrop Channel2000790.839227009010
429124400616040730Outcrop Channel20001050.272207007070
429224400606040732Outcrop Channel2000450.171205007200
429324400616040735Outcrop Channel2000170.22984003650
429424400636040735Outcrop Channel2000120.3055521055
429524400636040739Outcrop Channel200050.247117735
429624400616040742Outcrop Channel20001332.040143507270
429724400626040744Outcrop Channel20002120.417152505330
429824400666040748Outcrop Channel18090850.228183007840
429924400866040746Subcrop Composite  50.077165366
430024399696040765Mine Dump1509060.094116152
430124401496040367Mine Dump2006080.07517073
430224401276040380Not recorded  251.240836324
430324401056040400Mine Dump2006090.19455778
430424400896040433Mine Dump2000180.808654296
430524400676040431Mine Dump2000<50.03257104
430624400506040415Mine Dump2000130.3321165353
430724400486040411Mine Dump200050.03863103
430824400266040427Mine Dump20013090.36819151400
430924401026040525Mine Dump  620.4742880154
431024400596040485Mine Dump200120<50.0346586
431124400496040444Mine Dump200290<50.0575366
431224400066040439Mine Dump200 110.230309167
431324400156040444Mine Dump  251.025889147
431424400236040479Mine Dump200110<50.0112262
431524400396040509Mine Dump200170<50.0689374
431824400796040521Mine Dump200150<50.0252786
4319(8)24400656040738Outcrop Composite  2101.620>2500012700
432024402416040636Subcrop Composite  <50.0089368
432124402936040594Outcrop Channel28090<50.00816384
432224402036040235Outcrop Composite  <50.0391840
432324399406040265Outcrop Composite  <50.008948
432424401026040482Mine Dump20020070.131242314
432524400506039769Outcrop Composite  82.0804548
432624452636035159Outcrop Composite  <50.006439
432724452706035090Outcrop Composite  26.00.0263298
432824452476035007Outcrop Composite  <53.3905275
432924452506035005Outcrop Composite  <50.0491145
433024487076035962Outcrop Composite  350.4495447
433124487116035963Outcrop Composite  170.1403736
433224440036037410Mine Dump  60.793529271
433324440006037374Outcrop Composite  152.0205238
433424498186037854Outcrop Select  381.64014151
433524497406037990Outcrop Composite  625.78013954
433624496906038031Mine Dump  181.750168102
433724489986038428Outcrop Channel1202703721.435102377
433824490156038412Outcrop Channel110 70.759646
433924448076036267Float Select  <50.007633
434024448156036263Subcrop Select  6350.15716851005
434124450766036272Outcrop Channel150180<51.4606235
434224450806036264Outcrop Channel70180<50.3103074
434324450836036264Outcrop Channel100180<50.013435
434424450906036269Mine Dump2000<53.82012345
434624451816036252Outcrop Channel100180<50.433441
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
434724452496036248Subcrop Channel200240<51.175329
434824460026036256Outcrop Channel160 134.48020238
435024459616036251Outcrop Composite  81.0503933
435124459176036262Outcrop Channel180110<50.9762232
435224458526036280Outcrop Composite  <50.722641
435324457266036259Outcrop Channel100180<50.13931101
435424457236036260Outcrop Channel150180<50.3621032
435524457206036263Outcrop Channel200180<50.533733
435624455236036252Outcrop Channel130240<50.383325
435724454456036254Outcrop Composite  <50.734427
435824454586036301Outcrop Channel180180122.78016159
435924464536036262Outcrop Composite  103.6807946
436024465656036305Outcrop Channel12018090.9265843
436124465446036304Outcrop Channel110180192.00027958
436224465196036288Outcrop Channel17018071.5957835
436324463496036247Mine Dump200120310.99813453
436424463116036238Outcrop Composite  <50.5071829
436524462016036261Outcrop Channel100 <58.54022111
436624470916036238Outcrop Channel150180<54.3302746
436724470786036240Outcrop Channel150180<50.8312547
436824467596036239Outcrop Composite  <50.601625
436924466396036267Outcrop Composite  <50.8361832
437024467986036260Outcrop Composite  <50.04623100
437124471956036214Outcrop Composite  <50.161635
437224479036035889Outcrop Channel120120<52.3502486
437324478246035915Outcrop Composite  <50.339448
437424482676035877Subcrop Select  52.2006350
437524482876035870Subcrop Select  53.0506043
437824463526035774Outcrop Channel15050<50.5593056
437924463476035763Outcrop Channel 30<50.466547
438024461266035620Outcrop Composite  <50.5932246
438124460326035350Outcrop Composite  <50.0043031
438224461466035400Outcrop Channel12040<50.0381954
438324454806035148Outcrop Composite  1051.32560112
438424454906035156Outcrop Composite  <52.370944
438524457746035357Outcrop Composite  240.2175994
438624457706035347Float Select  80.5696242
438724457726035252Outcrop Channel60240770.01724133
438824455676034864Outcrop Composite  130.0653667
438924455226034904Outcrop Channel16020<50.0073347
439024455176034897Outcrop Channel20010<50.0032546
439124475916036155Subcrop Composite  70.2134534
439224482246035655Float Select  <50.096529
439324481876035678Subcrop Select  <50.081838
439424481346035690Float Select  390.4233665
439524481356035316Outcrop Select  260.5696628
439624445906036319Outcrop Channel170180621.5905582
439724446676036313Outcrop Channel80180<50.7012229
439824447166036295Outcrop Channel170180<50.8801840
439924445806036321Outcrop Channel1701802051.355725150
440024501096037912Outcrop Channel150140102.0509430
440124497816037862Outcrop Select  151.16011049
440224497716037840Outcrop Select  231.05510249
440324498276037945Float Select  273.6607848
440424497826037967Outcrop Channel10018091.9209845
440524497806037962Mine Dump200150384.37032051
440824496516038044Outcrop Composite  215.11024190
440924496676038061Float Select  51.7754864
441024464126034546Outcrop Select  <50.1295937
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
441124462026034613Outcrop Channel100200<50.07526345
441224462026034613Outcrop Channel120200<50.0159837
441324462026034613Outcrop Select  <50.0211440
441424459086034400Outcrop Channel170310<50.09823438
441524459086034399Outcrop Channel120310<50.0052051
441624457856034305Outcrop Channel12090<50.0072454
441724457916034307Outcrop Channel1100<50.0061232
441824452046034412Outcrop Channel160160<50.393457
441924452096034419Outcrop Channel1400<50.069528
442024451176034346Subcrop Composite  <50.367152
442124450916034329Float Select  361.93510664
442224450906034328Subcrop Channel10030<50.135231
442324476966041535Outcrop Composite  174.2702664
442424477296041426Outcrop Composite  83.1101256
442524448626043361Outcrop Composite  <52.200440

Notes:

  1. Coordinates Projection: Campo Inchauspe / Argentina 2 (ellipsoid: International 1924)
  2. ppm = g/t
  3. 10,000 ppm = 1.0%
  4. The primary ALS analytical method was “ME-MS89L™”, which is a sodium peroxide decomposition for complete recovery of lithium, rare earths, and associated trace elements.
  5. “<” indicates below lower limit of detection, “>” indicates above upper limit of detection.
  6. Over-limit samples for Cu (>25,000) were analysed using the ALS method “ME-OG62™”, which is uses four acid digestion to break down most silicates and all but the most resistive minerals.
  7. Over-limit samples for U (>25,000) are being analysed using the ALS method “U-XRF15b™”, which is ore grade XRF assay of a sample prepared by fusion with an oxidizing flux.
  8. Over-limit U assay result still pending.

[1] Because sampling was selective and targeted areas of visible mineralization, the results may be biased high and should not be considered representative of grade distribution, continuity or mineralization across the Huemul ProjectOne

Toronto, Canada – August 18, 2026 – Jaguar Uranium Corp. (NYSE-AM: JAGU) (“Jaguar”) is pleased to announce final assay results for copper from its initial rock sampling program (announced on July 20, 2026) at the Huemul Uranium-Copper-Vanadium (U-Cu-V) Project, located in Malargüe, Mendoza Province, Argentina across the more than 27,000-hectare district-scale project. The Company is planning a maiden drill campaign at the project which includes a past producing mine.

Management Commentary

“These results reinforce what drew us to Huemul in the first place. Copper grades as high as 8.54%, paired with strong uranium and vanadium values across multiple target areas, support our view that this historic district has considerable exploration potential. We’re moving quickly toward a maiden drill campaign to test these targets at depth,” said Steven Gold, President & Chief Executive Officer.

A District with Documented Historical Production

The Huemul Project is anchored by Argentina’s first-ever producing uranium mine, commissioned in 1955 and operated continuously until 1975 by the Comisión Nacional de Energía Atómica (CNEA). Historical records report that approximately 130,000 tonnes of mineralized material, historically described as ore, were processed at the Malargüe plant, with reported average head grades of 0.21% uranium, 2.0% copper and 0.11% vanadium (source: Guillermo Rojas, 1999. Distrito Uranìfero Pampa Amarilla, Mendoza. En Recursos Minerales de la Republica Argentina. Pag.1135-1140). The Company has not independently verified the historical production records or historical head-grade information, and such information should not be interpreted as current exploration results, a mineral resource estimate, a mineral reserve estimate or evidence of current economic viability.

The project hosts uranium-copper-vanadium mineralization in a classic sandstone-hosted deposit setting. The broader Malargüe Mining District remains largely untested by modern exploration methods. Based on the presence of a former producing mine, historical exploration data, and the extent of the Company’s land package, management believes the project warrants further systematic exploration.

Sampling Program

Jaguar conducted targeted sampling included outcrop, subcrop, rock chip composite, channel and float samples, across areas of visible surface mineralization. Field observations were generally consistent with the presence of mineralization described in historical reports, particularly around the former Huemul mine, as described previously here. Samples were collected from eight target areas, namely, Huemul Mine, Agua Botada, Uryco, Rosa, Vega Larga, Black Zone, Cerro Mirano and Lucy (Figure 1).

Channel samples were collected over intervals ranging from 50 cm to 280 cm. All samples were packaged and sealed at the project site by Jaguar geologist and transported to ALS in Mendoza, Argentina for analysis using sodium peroxide decomposition method ME-MS89L™. ALS Mendoza is a full-service laboratory and is ISO/IEC 17025 accredited sample preparation and geochemical analysis. ALS Mendoza is independent of Jaguar. 

Jaguar included 6 Blanks and 6 Duplicates as part of the sample submission (200 samples in total) for QA/QC assessment. Blank material performed satisfactorily. Two duplicate samples did not compare well and were subsequently re-analysed. The re-analysis confirmed the original assay values for those samples. The QP considers the QA/QC results satisfactory, and the assay results suitable for disclosure.

Figure 1 Huemul Project Target and Surface Sampling Locations

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Results

Most notably, sampling of strike extensions at the Uryco/Rosa and Black zone trend identified a potential 4-kilometre trend of copper mineralization observed in outcrop, consistent with the scale of the system suggested by historical work.

Selected significant results from the surface sampling with U grades greater than 100 ppm or Cu grades greater than 1.0% are presented in Table 2 below. The 100 ppm U and 1.0% Cu reporting thresholds used for Table 2 are exploration reporting thresholds selected by the Company and should not be interpreted as a cut-off grade, economic threshold, or indication of mineral resources or mineral reserves. A full tabulation of the sample coordinates, sample types and assay results is reported in Appendix 1.

Table 2 Selected significant results U (greater than 100 ppm) or Cu (greater than 1.0%)

Sample IDAg (ppm)Cu (%)U (ppm)V (ppm) Sample IDAg (ppm)Cu (%)U (ppm)V (ppm)
4243110.26810727 433260.793529271
42451060.336132543 4333152.0205238
4246430.816209045 4334381.64014151
4247952.30015545 4335625.78013954
4248131.68510438 4336181.750168102
4252150.07311250 43373721.435102377
4255110.971275147 43406350.15716851005
4257644.040272109 4341<51.4606235
4274140.4182230455 4344<53.82012345
4275140.275201146 4347<51.175329
4276160.692303126 4348134.48020238
4277310.29489702000 435081.0503933
4278321.23554703880 4358122.78016159
4282281.14545111 4359103.6807946
42847081.46042102780 4361192.00027958
4285681.810153373 436271.5957835
4290790.839227009010 4365<58.54022111
42911050.272207007070 4366<54.3302746
4292450.171205007200 4372<52.3502486
4293170.22984003650 437452.2006350
4294120.3055521055 437553.0506043
429550.247117735 43831051.32560112
42961332.040143507270 4384<52.370944
42972120.417152505330 4387770.01724133
4298850.228183007840 4396621.5905582
429950.077165366 43992051.355725150
430060.094116152 4400102.0509430
430180.07517073 4401151.16011049
4302251.240836324 4402231.05510249
430390.19455778 4403273.6607848
4304180.808654296 440491.9209845
4306130.3321165353 4405384.37032051
430890.36819151400 4408215.11024190
4309620.4742880154 440951.7754864
4312110.230309167 4411<50.07526345
4313251.025889147 4414<50.09823438
43192101.620>2500012700 4421361.93510664
4321<50.00816384 4423174.2702664
432470.131242314 442483.1101256
432582.0804548 4425<52.200440
4328<53.3905275      

Notes:

  1. ppm = g/t
  2. 10,000 ppm = 1.0%
  3. Values reported as ‘>25,000 ppm’ exceed the upper detection limit and are subject to over-limit reanalysis; final values may differ.

Huemul Mine / Agua Botada Trend

The Huemul Mine / Agua Botada Trend represents a predominantly uranium-vanadium mineralized zone. Mineralization is hosted in the Diamante Formation sandstones, conglomerates, shales and volcano-clastics striking north south and dipping 20-25° to the west in the north and becoming flat lying to the south.  Recent sampling results appear show the dominance of U over Cu in this area (Figure 3).

Figure 2 Uranium and copper surface sampling results along the Huemul Mine – Agua Botada Trend.

Uryco-Rosa, Black Zone and Vega Larga Trend

The Cerro Mirano, Uryco-Rosa, Black Zone and Vega Larga areas are dominated by Cu-U-V±Ag mineralization. Mapping, rock sampling and gamma surveying have delineated the Uryco-Rosa, Black Zone and Vega Larga target areas, with apparent strike lengths of approximately 2,200 m, 1,300 m and 2,300 m, respectively, hosted along conglomerate and sandstone horizons of the Diamante Formation that collectively define a greater than 4 km corridor of mineralized occurrences. The Cerro Mirano mineralized zone is related to the intrusion of andesitic dikes and is approximately 300 m long. Recent sampling results appear to show the dominance of Cu over U in this area (Figure 3).

Figure 3 Uranium and copper surface sampling results along the Uryco-Rosa, Black Zone and Vega Larga Trend.

Since the sampling of visible mineralization is selective by nature, the exploration results disclosed in this news release are potentially biased and do not establish the extent and continuity of grade, tonnage, economic significance, mineral resources or mineral reserves of the Huemul Project.

Data Verification

Over-limit samples for copper (indicated as >25000) were re-analysed by ALS using 4 acid digest and ICP finish (ME-OG62™). One over-limit sample for uranium (indicated as >25000) is being re-analysed using XRF for base metal ores by fusion (ME-XRF15b™) and is still pending. Duplicate re-analysis confirmed the original assay results that were received and indicates a potential sample swap, either during project preparation, or at the laboratory. In the opinion of the QP, these issues are not material at this stage of the project but will need closer attention during further work phases.

The QP’s review of the sampling, analytical and QA/QC information disclosed in this news release was limited to a review of information provided by the Company and its consultants, including sample locations, sample descriptions, analytical certificates, analytical methods and QA/QC results. The QP has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures, sample locations, sample security or chain-of-custody procedures. The QP has not independently verified the historical production, historical grade or historical exploration information referenced in this news release. The QP’s review is subject to the limitations described herein, including the selective nature of the samples, pending over-limit reanalysis for certain uranium.

Cautionary Note

The Huemul Project is an exploration-stage property. No mineral resource or mineral reserve estimate has been prepared for the Huemul Project under National Instrument 43-101 — Standards of Disclosure for Mineral Projects (“NI 43-101”) or Subpart 1300 of Regulation S-K. The surface sampling results disclosed in this news release are exploration results only and should not be interpreted as establishing the presence of mineral resources or mineral reserves. Rock chip and channel samples are selective by nature and may not be representative of mineralization across the property.

Historical production, grade and exploration information referenced in this news release is historical in nature and has not been independently verified by the Company or by a qualified person under NI 43-101 or Subpart 1300 of Regulation S-K. The Company is not treating this information as current mineral resources, mineral reserves, or current exploration results. The information is considered relevant because it indicates the presence of uranium-copper-vanadium mineralization on the property, but it should not be relied upon until confirmed by additional exploration work.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by George van der Walt, Pr.Sci.Nat., an independent Principal Consultant with The MSA Group (Pty) Ltd., who is a qualified person under NI 43-101 and Subpart 1300 of Regulation S-K. Mr. van der Walt has reviewed the sampling, analytical and QA/QC information disclosed in this news release on the basis of information provided by the Company and its consultants and has approved the technical disclosure in the form and context in which it appears. Mr. van der Walt has not completed a current site visit to the Huemul Project and has not independently observed or physically verified the sampling procedures or sample chain of custody.

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.

For more information, contact:

Steven Gold, Chief Executive Officer

[email protected]

+1-416-648-4065

www.jaguaruranium.com

Forward Looking Statements

This news release contains “forward-looking statements” within the meaning of applicable U.S. and Canadian securities laws. Forward-looking statements are statements that are not historical facts and include, without limitation, statements regarding: the timing and results of assay data; the interpretation of exploration results; the potential extent, continuity, and significance of observed mineralization; the identification of prospective target areas; the potential for discovery; planned or future exploration programs; and the Company’s expectations regarding the Huemul Project and the broader Malargüe district.

Forward-looking statements are based on a number of material assumptions, including, but not limited to: the accuracy of historical data; the reliability of sampling and field observations; the completion of over-limit reanalysis and any duplicate-sample follow-up without material adverse changes to the preliminary interpretation; the continuity of mineralization observed at surface; the receipt of assay results consistent with expectations; the availability of financing and personnel; the availability of equipment, laboratory capacity, property access and required permits; and the Company’s ability to execute its exploration plans as currently contemplated.

Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those expressed or implied by such statements. These risks and uncertainties include, among others: the risk that assay results or over-limit reanalysis results do not confirm preliminary observations; risks relating to the interpretation of exploration results; risks that duplicate-sample reanalysis or additional QA/QC review may affect the interpretation of results; the possibility that mineralization is not continuous or of economic grade; risks associated with early-stage exploration properties; the selective nature of rock chip, channel, composite, select and mine-dump samples; reliance on historical data that may be incomplete or inaccurate; commodity price volatility; permitting and regulatory risks; operational and technical risks; and general economic, market and industry conditions.

Forward-looking statements speak only as of the date of this news release. Except as required by applicable securities laws, the Company undertakes no obligation to update or revise any forward-looking statements to reflect events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.

APPENDIX 1: Full tabulation of final sample assay results

Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
422624406366042968Outcrop Chip  <50.002360
422724407036042691Subcrop Channel160250<50.002172
422824407036042691Subcrop Channel80250<50.0031177
422924407186042793Outcrop Channel 100<5<0.002387
423024398376043204Outcrop Channel140250<5<0.002210
423124397566042929Outcrop Channel1200<5<0.002148
423224401926043308Outcrop Composite  <5<0.002414
423324401836042783Outcrop Channel200270<5<0.002135
423424401766042580Outcrop Channel120260<50.002236
423524404286042411Outcrop Composite  <5<0.002238
423624404466042469Outcrop Channel110280<5<0.002124
423724404936042537Outcrop Composite  <5<0.002161
423824404366042855Outcrop Composite  <5<0.002250
423924407596042423Outcrop Channel80270<50.0031163
424024406566042568Outcrop Composite  <50.002243
424124407436042595Outcrop Channel80270<50.0031183
424224401966041287Mine Dump  190.1358629
424324401966041287Mine Dump  110.26810727
424424402106041262Mine Dump150280<50.1225840
424524402056041268Mine Dump200151060.336132543
424624402286041289Mine Dump  430.816209045
424724403106041673Subcrop Composite  952.30015545
424824403236041677Mine Dump  131.68510438
424924402476041822Outcrop Composite  <50.009483
425024402446041754Outcrop Composite  <50.004254
425124401796041612Outcrop Composite  <50.005387
425224402086041110Mine Dump  150.07311250
425324402476041081Outcrop Channel120280<50.002436
425424402476041081Outcrop Channel80280<50.002775
425524402406041074Outcrop Channel60270110.971275147
425724402406041074Outcrop Channel110270644.040272109
425924402266041078Outcrop Channel70300<50.0091666
426024402266041078Outcrop Channel80300<50.009948
426124402336041081Outcrop Channel100300<50.0283133
426224402146041079Outcrop Composite  <50.005682
426324402146041079Outcrop Channel80280<50.006857
426424402026041075Outcrop Channel120280<50.0021249
426524402026041075Outcrop Channel100280<50.014631
426624401976041068Outcrop Channel9028050.1406541
426724401976041068Outcrop Channel50270<50.0135104
426824401976041068Outcrop Channel70270<50.005441
426924401046041042Outcrop Composite  <50.002356
427024400736040983Outcrop Channel120280<50.002367
427124401076040952Outcrop Composite  <50.002252
427224399536040953Outcrop Channel120 <5<0.002528
427324399916040998Outcrop Composite  <5<0.002547
427424400196040663Mine Dump150 140.4182230455
427524400326040624Mine Dump180 140.275201146
427624399816040684Mine Dump170 160.692303126
427724399776040682Mine Dump  310.29489702000
427824399706040697Mine Dump  321.23554703880
427924400416040718Outcrop Composite  <50.0105766
428024400596040708Outcrop Channel23030<50.05845124
428124400616040715Outcrop Channel20030170.8204399
428224400606040718Outcrop Channel2000281.14545111
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
428324400636040718Outcrop Channel2000300.81574418
428424400646040722Outcrop Channel20007081.46042102780
428524400626040724Outcrop Channel2000681.810153373
428824400626040720Outcrop Channel2000330.68655114
428924400626040726Outcrop Channel2000240.92591117
429024400616040729Outcrop Channel2000790.839227009010
429124400616040730Outcrop Channel20001050.272207007070
429224400606040732Outcrop Channel2000450.171205007200
429324400616040735Outcrop Channel2000170.22984003650
429424400636040735Outcrop Channel2000120.3055521055
429524400636040739Outcrop Channel200050.247117735
429624400616040742Outcrop Channel20001332.040143507270
429724400626040744Outcrop Channel20002120.417152505330
429824400666040748Outcrop Channel18090850.228183007840
429924400866040746Subcrop Composite  50.077165366
430024399696040765Mine Dump1509060.094116152
430124401496040367Mine Dump2006080.07517073
430224401276040380Not recorded  251.240836324
430324401056040400Mine Dump2006090.19455778
430424400896040433Mine Dump2000180.808654296
430524400676040431Mine Dump2000<50.03257104
430624400506040415Mine Dump2000130.3321165353
430724400486040411Mine Dump200050.03863103
430824400266040427Mine Dump20013090.36819151400
430924401026040525Mine Dump  620.4742880154
431024400596040485Mine Dump200120<50.0346586
431124400496040444Mine Dump200290<50.0575366
431224400066040439Mine Dump200 110.230309167
431324400156040444Mine Dump  251.025889147
431424400236040479Mine Dump200110<50.0112262
431524400396040509Mine Dump200170<50.0689374
431824400796040521Mine Dump200150<50.0252786
4319(8)24400656040738Outcrop Composite  2101.620>2500012700
432024402416040636Subcrop Composite  <50.0089368
432124402936040594Outcrop Channel28090<50.00816384
432224402036040235Outcrop Composite  <50.0391840
432324399406040265Outcrop Composite  <50.008948
432424401026040482Mine Dump20020070.131242314
432524400506039769Outcrop Composite  82.0804548
432624452636035159Outcrop Composite  <50.006439
432724452706035090Outcrop Composite  26.00.0263298
432824452476035007Outcrop Composite  <53.3905275
432924452506035005Outcrop Composite  <50.0491145
433024487076035962Outcrop Composite  350.4495447
433124487116035963Outcrop Composite  170.1403736
433224440036037410Mine Dump  60.793529271
433324440006037374Outcrop Composite  152.0205238
433424498186037854Outcrop Select  381.64014151
433524497406037990Outcrop Composite  625.78013954
433624496906038031Mine Dump  181.750168102
433724489986038428Outcrop Channel1202703721.435102377
433824490156038412Outcrop Channel110 70.759646
433924448076036267Float Select  <50.007633
434024448156036263Subcrop Select  6350.15716851005
434124450766036272Outcrop Channel150180<51.4606235
434224450806036264Outcrop Channel70180<50.3103074
434324450836036264Outcrop Channel100180<50.013435
434424450906036269Mine Dump2000<53.82012345
434624451816036252Outcrop Channel100180<50.433441
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
434724452496036248Subcrop Channel200240<51.175329
434824460026036256Outcrop Channel160 134.48020238
435024459616036251Outcrop Composite  81.0503933
435124459176036262Outcrop Channel180110<50.9762232
435224458526036280Outcrop Composite  <50.722641
435324457266036259Outcrop Channel100180<50.13931101
435424457236036260Outcrop Channel150180<50.3621032
435524457206036263Outcrop Channel200180<50.533733
435624455236036252Outcrop Channel130240<50.383325
435724454456036254Outcrop Composite  <50.734427
435824454586036301Outcrop Channel180180122.78016159
435924464536036262Outcrop Composite  103.6807946
436024465656036305Outcrop Channel12018090.9265843
436124465446036304Outcrop Channel110180192.00027958
436224465196036288Outcrop Channel17018071.5957835
436324463496036247Mine Dump200120310.99813453
436424463116036238Outcrop Composite  <50.5071829
436524462016036261Outcrop Channel100 <58.54022111
436624470916036238Outcrop Channel150180<54.3302746
436724470786036240Outcrop Channel150180<50.8312547
436824467596036239Outcrop Composite  <50.601625
436924466396036267Outcrop Composite  <50.8361832
437024467986036260Outcrop Composite  <50.04623100
437124471956036214Outcrop Composite  <50.161635
437224479036035889Outcrop Channel120120<52.3502486
437324478246035915Outcrop Composite  <50.339448
437424482676035877Subcrop Select  52.2006350
437524482876035870Subcrop Select  53.0506043
437824463526035774Outcrop Channel15050<50.5593056
437924463476035763Outcrop Channel 30<50.466547
438024461266035620Outcrop Composite  <50.5932246
438124460326035350Outcrop Composite  <50.0043031
438224461466035400Outcrop Channel12040<50.0381954
438324454806035148Outcrop Composite  1051.32560112
438424454906035156Outcrop Composite  <52.370944
438524457746035357Outcrop Composite  240.2175994
438624457706035347Float Select  80.5696242
438724457726035252Outcrop Channel60240770.01724133
438824455676034864Outcrop Composite  130.0653667
438924455226034904Outcrop Channel16020<50.0073347
439024455176034897Outcrop Channel20010<50.0032546
439124475916036155Subcrop Composite  70.2134534
439224482246035655Float Select  <50.096529
439324481876035678Subcrop Select  <50.081838
439424481346035690Float Select  390.4233665
439524481356035316Outcrop Select  260.5696628
439624445906036319Outcrop Channel170180621.5905582
439724446676036313Outcrop Channel80180<50.7012229
439824447166036295Outcrop Channel170180<50.8801840
439924445806036321Outcrop Channel1701802051.355725150
440024501096037912Outcrop Channel150140102.0509430
440124497816037862Outcrop Select  151.16011049
440224497716037840Outcrop Select  231.05510249
440324498276037945Float Select  273.6607848
440424497826037967Outcrop Channel10018091.9209845
440524497806037962Mine Dump200150384.37032051
440824496516038044Outcrop Composite  215.11024190
440924496676038061Float Select  51.7754864
441024464126034546Outcrop Select  <50.1295937
Sample IDEastingNorthingSample TypeChannel
Length
(cm)
Channel
Orientation
(
°)
Ag (ppm)Cu (%)U (ppm)V (ppm)
441124462026034613Outcrop Channel100200<50.07526345
441224462026034613Outcrop Channel120200<50.0159837
441324462026034613Outcrop Select  <50.0211440
441424459086034400Outcrop Channel170310<50.09823438
441524459086034399Outcrop Channel120310<50.0052051
441624457856034305Outcrop Channel12090<50.0072454
441724457916034307Outcrop Channel1100<50.0061232
441824452046034412Outcrop Channel160160<50.393457
441924452096034419Outcrop Channel1400<50.069528
442024451176034346Subcrop Composite  <50.367152
442124450916034329Float Select  361.93510664
442224450906034328Subcrop Channel10030<50.135231
442324476966041535Outcrop Composite  174.2702664
442424477296041426Outcrop Composite  83.1101256
442524448626043361Outcrop Composite  <52.200440

Notes:

  1. Coordinates Projection: Campo Inchauspe / Argentina 2 (ellipsoid: International 1924)
  2. ppm = g/t
  3. 10,000 ppm = 1.0%
  4. The primary ALS analytical method was “ME-MS89L™”, which is a sodium peroxide decomposition for complete recovery of lithium, rare earths, and associated trace elements.
  5. “<” indicates below lower limit of detection, “>” indicates above upper limit of detection.
  6. Over-limit samples for Cu (>25,000) were analysed using the ALS method “ME-OG62™”, which is uses four acid digestion to break down most silicates and all but the most resistive minerals.
  7. Over-limit samples for U (>25,000) are being analysed using the ALS method “U-XRF15b™”, which is ore grade XRF assay of a sample prepared by fusion with an oxidizing flux.
  8. Over-limit U assay result still pending.

[1] Because sampling was selective and targeted areas of visible mineralization, the results may be biased high and should not be considered representative of grade distribution, continuity or mineralization across the Huemul ProjectOne