Nuinsco MRE Subset at Prairie Lake Confirms Higher Grade and Potential Starter Pit Mineralized Domain

(TheNewswire)

Toronto – TheNewswire - February 26, 2026 – Nuinsco Resources Limited (“Nuinsco” or the“Company”) (CSE: NWI, FRA: NJX) today announced a new subset (the“MRE Subset”) of the mineral resource estimate (the “2022 MRE”) at its Prairie Lake Critical Mineralsand Phosphate Project (“Prairie Lake” or the “Project”)located near Terrace Bay, Ontario. The MRESubset identifies a domain of mineralization with substantially higher phosphate(“P2O5”) and rare earth element(“REE”) grades compared with the 2022 MRE. The presence of thisconcentrated higher-grade mineralization within the MRE Subset mayidentify a possible starter pit location that could significantlyenhance the development potential of the Project.

The Prairie Lake Project hosts rare earth element(“REE”) mineralization that coincides with phosphate. Internaleconomic studies show that phosphate and REEs are key drivers of theProject’s economic viability. As tabulatedbelow, using a 3.5% P2O5 cut-off grade, the pit-constrainedMRE Subset includes*:

• Indicated MineralResource: 3.54 million tonnes at 4.59%5 (+24%) and 2,204 g/tTREO (+32%). 

• Inferred Mineral Resource: 53.45 million tonnes at 5.11% (+51%)and 2,355 g/t (+17%). 

*(% increase over the 2022 MREare bracketed)

This MRE Subset is part of the larger 2022 MRE (alsosummarized below) and provides strong evidence of the presence ofhigh-grade, mineralized domains of substantial size and potentialeconomic importance. These domains, with favorable technical,logistical, and geographical characteristics, as well as strategicsignificance, have substantial implications for the ongoingdevelopment of Prairie Lake.

“Ongoing work at the Project continues to deliverhighly encouraging results,” said Paul Jones, CEO. “The moredetailed evaluation of the 2022 MRE and the identification of thehigher-grade MRE Subset provide valuable insight into opportunities tomaximize the Project’s economic potential. The scale of the mineralendowment, combined with the Project’s exceptional logisticaladvantages, offers considerable flexibility in planning anddevelopment.

The higher-grade MRE Subset has been delineated usingexisting drill data and, while already substantial in size, we believethere remains significant potential to define additional mineralizedmaterial through further work.”

Prairie Lake Project Pit ConstrainedMRE Subset(1-6)

*TREO = Total Rare Earth Oxides: neodymium,Nd2O3 ; praseodymium, Pr6O11; scandium, Sc2O3; Cerium, CeO2;lanthanum, La2O3; samarium,Sm2O3; yttrium, Y2O3.

A full description of methodology used to estimate thePrairie Lake Project 2022 Mineral Resource Estimate is contained inthe NI 43-101 compliant Technical Report, effective date 31 May 2022prepared by P&E Mining Consultants Inc. that is filed on SEDAR.

1.        Mineral Resources that are not MineralReserves do not have demonstrated economic viability.

1. The estimate of Mineral Resources may be materiallyaffected by environmental, permitting, legal, title, taxation,socio-political, marketing, or other relevant issues. 

3.        The Inferred Mineral Resource in thisestimate has a lower level of confidence than that applied to anIndicated Mineral Resource and must not be converted to a MineralReserve. It is reasonably expected that the majority of the InferredMineral Resource could potentially be upgraded to an Indicated MineralResource with continued exploration.

1. The Mineral Resources were estimated in accordance withthe Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIMStandards on Mineral Resources and Reserves, Definitions (2014) andBest Practices Guidelines (2019) prepared by the CIM StandingCommittee on Reserve Definitions and adopted by the CIMCouncil. 

5.        A US$ price of , $200/t P2O5, FX of 0.72, and process recovery of 75%were used.

6.        The constraining pit optimizationparameters were C$2.50/t mining cost for all material, C$35/t processcost, C$10/t G&A cost and 45-degree pit slopes with a 3.5%P2O5 cut-off.

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Prairie Lake is a significant Critical Minerals assetlocated in the heart of North America. It hosts a very substantial MREof phosphate mineralization, has amongst the world’s highest knownlight rare earth element content in apatite and contains a host ofother REE bearing minerals, as well as niobium-bearing pyrochlore.Metallurgical studies to date demonstrate that a clean phosphateconcentrate, grading 26% P2O5 at 76% processrecovery with ample room for improvement, and with valuablerare earth element co-concentrate, canbe reliably produced from Prairie Lakefeed. Metallurgical studies are continuing now,with the aim of further optimizing recoveries and concentrategrade.

The elements found at Prairie Lake areessential for applications in transportation,power distribution, green technologies and agriculture, to name a few.The Project is of immense value to a secure Critical Minerals supplychain, and presents substantial logistical benefits, including easyaccess to:

• The Towns of Marathon, Terrace Bay and other affectedcommunities - all able to supply a local, skilled workforce. 

• All weather forest access road crossing the project anddeposit. 

• Paved Highways 17 and 11 to the south andnorth. 

• Canadian Pacific Railway and Canadian National Railwaynetworks. 

• High capacity (230kV) electrical power transmissionline. 

• 50km from the Marathon deep water port project.Deep-water ports are also located at Thunder Bay and Sault Ste. Marie,able to handle ocean going ships. 

• The Marathon airport. 

Laura Giroux, P.Geo., Chief Geologist, of Nuinsco and aQualified Person and Eugene Puritch, P.Eng., FEC, CET,  President ofP&E Mining Consultants Inc., is an independent Qualified Person,both QPs as defined under National Instrument 43-101. Ms. Giroux andMr. Puritch have reviewed and approved the technical content of thisnews release.

PDAC 2026

Nuinsco will be attending the Prospectors &Developers Association of Canada (“PDAC”) Convention2026, and invites current and prospective investors to meet with theCompany at Booth 2620 in the Investors Exchange on Sunday March 1 andMonday March 2.

The PDAC Convention 2026 will be held at the MetroToronto Convention Centre, South Building, located at 222 BremnerBlvd., Toronto, Ontario.

About Nuinsco ResourcesLimited

Nuinsco Resources has over 50years of exploration suc­cess and is a growth-oriented,multi-commodity mineral explora­tion and development company focusedon prospective oppor­tunities in Canada and internationally.Currently the Company has the large multi-commodity (phosphate, rareearth element, niobi­um, tantalum) Prairie Lake Project nearMarathon-Terrace Bay, the Zig Zag Lake Property (lithium, tantalum)near Armstrong optioned to First Class Metals PLC and retains a NSRroyalty on the Sunbeam Gold Property near Atikokan.  

Prairie Lake Project 2022Pit-Constrained MRE(1-6)

*TREO = Total Rare Earth Oxides: neodymium,Nd2O3 ; praseodymium, Pr6O11; scandium, Sc2O3; Cerium, CeO2;lanthanum, La2O3; samarium,Sm2O3; yttrium, Y2O3.

A full description ofmethodology used to estimate the Prairie Lake Project Mineral ResourceEstimate is contained in the NI 43-101 compliant Technical Report,effective date 31 May 2022 prepared by P&E Mining Consultants Inc.that is filed on SEDAR.

1. Mineral Resources that are not Mineral Reserves do nothave demonstrated economic viability. 

2. The estimate of Mineral Resources may be materiallyaffected by environmental, permitting, legal, title, taxation,socio-political, marketing, or other relevant issues. 

3. The Inferred Mineral Resource in this estimate has alower level of confidence than that applied to an Indicated MineralResource and must not be converted to a Mineral Reserve. It isreasonably expected that the majority of the Inferred Mineral Resourcecould potentially be upgraded to an Indicated Mineral Resource withcontinued exploration. 

4.        The Mineral Resources were estimated inaccordance with the Canadian Institute of Mining, Metallurgy andPetroleum (CIM), CIM Standards on Mineral Resources and Reserves,Definitions (2014) and Best Practices Guidelines (2019) prepared bythe CIM Standing Committee on Reserve Definitions and adopted by theCIM Council.

5.        US$ Metal prices used were $80/KgNd2O3, $80/Kg Pr6O11, $1,500/Kg Sc2O3, $50/KgNb2O5, $250/t P2O5, $1.35/Kg CeO2,$1.35/Kg La2O3, $3.50/Kg Sm2O3, Nil$/t Ta2O5 and $13.00/kgY2O3, 0.78 FX all with combined processrecoveries and payables of 50%, except P2O5 at 75%.

6.        The constraining pit optimizationparameters were C$2.50/t mining cost for all material, C$25/t processcost, C$5/t G&A cost and 45-degree pit slopes with a C$30/t NSRcut-off.

Forward-LookingStatements

This news release containsforward-looking statements or information (collectively,“FLI”) within the meaningof applicable Canadian securities legislation. FLI is based onexpectations, estimates, projections, and interpretations as at thedate of this news release.

All statements, other thanstatements of historical fact, included herein are FLI that involvevarious risks, assumptions, estimates and uncertainties. Generally,FLI can be identified by the use of statements that include words suchas “seeks”, “believes”, “anticipates”, “plans”,“continues”, “budget”, “scheduled”, “estimates”,“expects”, “forecasts”, “intends”, “projects”,“predicts”, “proposes”, "potential", “targets”and variations of such words and phrases, or by statements thatcertain actions, events or results “may”, “will”, “could”,“would”, “should” or “might”, “be taken”, “occur”or “be achieved.”

FLI herein includes, but is notlimited to parameters and methods used to estimate the 2022 MRE andMRE Subset (each an “MRE”)at Prairie Lake; the prospects, if any, of Prairie Lake; futuredrilling at Prairie Lake; and the significance of historic explorationactivities and results.

FLI is not, and cannot be, aguarantee of future results or events. FLI is designed to help youunderstand management’s current views of its near- and longer-termprospects, and it may not be appropriate for other purposes. FLI bytheir nature are based on assumptions and involve known and unknownrisks, uncertainties and other factors which may cause the actualresults, performance, or achievements of the Company to be materiallydifferent from any future results, performance or achievementsexpressed or implied by such FLI.

Although the FLI contained in thisdocument is based upon what management believes, or believed at thetime, to be reasonable assumptions, the Company cannot assureshareholders and prospective purchasers of securities of the Companythat actual results will be consistent with such FLI, as there may beother factors that cause results not to be as anticipated, estimatedor intended, and neither the Company nor any other person assumesresponsibility for the accuracy and completeness of any such FLI.Except as required by law, the Company does not undertake, and assumesno obligation, to update or revise any such FLI contained in thisdocument to reflect new events or circumstances. Unless otherwisenoted, this document has been prepared based on information availableas of the date of this document. Accordingly, you should not placeundue reliance on the FLI, or information contained herein.

Furthermore, should one or more ofthe risks, uncertainties or other factors materialize, or shouldunderlying assumptions prove incorrect, actual results may varymaterially from those described in FLI.

Assumptions upon which FLI is based,without limitation, include: the results of exploration activities,the Company’s financial position and general economic conditions;the ability of exploration activities to accurately predictmineralization; the accuracy of geological modelling; the ability ofthe Company to complete further exploration activities; the legitimacyof title and property interests in Prairie Lake; the accuracy of keyassumptions, parameters or methods used to estimate the MREs; theability of the Company to obtain required approvals; geological andexploration technical problems; failure of equipment or processes tooperate as anticipated; the evolution of the global economic climate;commodity prices; foreign exchange rates; environmental expectations;community and non-governmental actions; and, the Company’s abilityto secure required funding. Risks and uncertainties about theCompany's business are discussed in the disclosure materialsfiled with the securities regulatory authorities in Canada, which areavailable at www.sedarplus.ca.

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