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Vancouver, British Columbia TheNewswire – October 20th, 2025 Prismo Metals Inc. (the ‘ Company ‘) (CSE: PRIZ,OTC:PMOMF) (OTCQB: PMOMF) is pleased to announce a non-brokered private placement (the ‘ Private Placement ‘) of 12.5 million units of the Company (‘ Units ‘) at an issue price of $0.10 per Unit for minimum gross proceeds of $1,250,000. Each Unit will consist of one common share in the capital of the Company (a ‘ Share ‘) and one-half of one common share purchase warrant of the Company (each whole warrant, a ‘ Warrant ‘). Each Warrant will entitle the holder to purchase one Share for a period of thirty-six (36) months from the date of issue at an exercise price of $0.175. The Warrants will contain an accelerated expiry clause (the ‘ Acceleration Clause ‘). Pursuant to the Acceleration Clause, if the Shares of the Company close at or above $0.25 for ten (10) consecutive trading days on the Canadian Securities Exchange (‘ CSE ‘), then the Company may accelerate the expiry date of the Warrants by issuing a news release announcing the accelerated Warrant term, pursuant to which the Warrants will expire on the 30th calendar days after the date of such news release.

The Company intends to use the net proceeds of the Private Placement primarily for drilling at its Silver King project and for general corporate purposes . In August 2025, Prismo submitted a plan of operations for the drill program with the Forest Service in Arizona. The first phase of drilling at Silver King will consist of a minimum of 1,000 meters.

Dr. Craig Gibson, Chief Exploration Officer of Prismo commented: ‘This first phase is designed to test the upper half of the steeply dipping pipelike Silver King mineralized body as well as potentially mineralization adjacent to the dense stockwork that was the focus of historic mining. Follow up drilling will expand on the initial program based on the results and may include separate targets outside of the historic mining area, such as the polymetallic vein mentioned above. The discovery of the two mineralized veins and porphyry style mineralization has resulted in Prismo evaluating a larger drill program to test those targets.’

Dr. Gibson added: ‘We have also received the overlimit assays for silver for four samples from the Ripsey mine, which range from 132 to 224 g/t Ag. These results confirm the high-grade nature of the mineralization along the Ripsey vein, exposed at the surface and in underground workings over about 600 meters along strike.’

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Figure 1. Proposed drill pads for the Silver King project in the process of being permitted.

Figure 2 . Cross section through the Silver King mine workings showing proposed drill holes (in black) to test the pipelike mineralized body (in red)

The Private Placement will also be made available to existing shareholders of the Company who, as of the close of business on October 18th, 2025, held Shares (and who continue to hold such Shares as of the closing date of the Private Placement), pursuant to the existing securityholder exemption set out in BC Instrument 45-534 – Exemption From Prospectus Requirement for Certain Trades to Existing Security Holders (the ‘ Existing Securityholder Exemption ‘). The Existing Securityholder Exemption limits a shareholder to a maximum investment of CAD$15,000 in a 12-month period unless the shareholder has obtained advice regarding the suitability of the investment and, if the shareholder is resident in a jurisdiction of Canada, that advice has been obtained from a person that is registered as an investment dealer in the jurisdiction. If the Company receives subscriptions from investors relying on the Existing Securityholder Exemption exceeding the maximum amount of the Private Placement, the Company intends to adjust the subscriptions received on a pro-rata basis.

The Units issued pursuant to the Private Placement, and the Existing Securityholder Exemption will be subject to a four-month hold period from the closing date of the Private Placement under applicable Canadian securities laws, in addition to such other restrictions as may apply under applicable securities laws of jurisdictions outside Canada.

The Company may pay finder’s fees to eligible finders in connection with the Private Placement, subject to compliance with applicable securities laws and Canadian Securities Exchange policies.

The securities being offered have not been and will not be registered under the U.S. Securities Act and may not be offered or sold in the United States, or to, or for the account or benefit of, U.S. persons or persons in the United States, absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any State in which such offer, solicitation or sale would be unlawful.

Ripsey Gold Project Overlimit Assay Results

The Company has also received the overlimit assays for silver for four samples from the Ripsey mine, ranging from 132 to 224 g/t Ag, announced October 16, 2025 (Table 1).  These results confirm the high-grade nature of the mineralization along the Ripsey vein, exposed at the surface and in underground workings over about 600 meters along strike.

Table 1. Assay results for samples taken of the Ripsey vein

Qualified Person

Dr. Craig Gibson, PhD., CPG., a Qualified Person as defined by NI-43-01 regulations and Chief Exploration Officer and a director of the Company, has reviewed and approved the technical disclosures in this news release. Other than the sampling conducted by Dr. Craig Gibson as indicated herein, the data presented in this press release was obtained from public sources, should be considered incomplete and is not qualified under NI 43-101, but is believed to be accurate. The Company has not verified the historical data presented and it cannot be relied upon, and it is being used solely to aid in exploration plans.

About the Silver King

Discovered in 1875, the Silver King mine was one of Arizona ‘ s most important historic producers, yielding nearly 6 million ounces of silver at grades of up to 61 oz/t.  The Silver King mine sits only 3 km from the main shaft of the Resolution Copper project — a joint venture between Rio Tinto and BHP and one of the world ‘ s largest unmined copper deposits with an estimated copper resource of 1.787 billion metric tonnes at an average grade of 1.5% copper (1) . The unique land position is fully surrounded by Resolution Copper ‘ s claim block, offering strategic upside. Selected samples from small-scale production in the late 1990s returned grades as high as 644 oz/t silver (18,250 g/t) and 0.53 oz/t gold (15 g/t), indicating that high-grade mineralization remains.

About Prismo Metals Inc.

Prismo (CSE: PRIZ,OTC:PMOMF) is a mining exploration company focused on advancing its Silver King, Ripsey and Hot Breccia projects in Arizona and its Palos Verdes silver project in Mexico.

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Prismo Metals Inc.

1100 – 1111 Melville St., Vancouver, British Columbia V6E 3V6

Phone: (416) 361-0737

Contact:

Alain Lambert, Chief Executive Officer alain.lambert@prismometals.com

Gordon Aldcorn, President gordon.aldcorn@prismometals.com

Cautionary Note Regarding Forward-Looking Information

This release includes certain statements and information that may constitute forward-looking information within the meaning of applicable Canadian securities laws. Forward-looking statements relate to future events or future performance and reflect the expectations or beliefs of management of the Company regarding future events. Generally, forward-looking statements and information can be identified by the use of forward-looking terminology such as ‘intends’ or ‘anticipates’, or  variations of such words and phrases or statements that certain actions, events or results ‘may’, ‘could’, ‘should’, ‘would’ or ‘occur’. This information and these statements, referred to herein as ‘forward‐looking statements’, are not historical facts, are made as of the date of this news release and include without limitation, statements regarding discussions of future plans, estimates and forecasts and statements as to management’s expectations and intentions with respect to, among other things: the timing, costs and results of drilling at Silver King.

These forward‐looking statements involve numerous risks and uncertainties, and actual results might differ materially from results suggested in any forward-looking statements. These risks and uncertainties include, among other things: delays in obtaining or failure to obtain appropriate funding to finance the exploration program at Silver King.

In making the forward-looking statements in this news release, the Company has applied several material assumptions, including without limitation, that: the ability to raise capital to fund the drilling campaign at Silver King and the timing of such drilling campaign.

Although management of the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information. Readers are cautioned that reliance on such information may not be appropriate for other purposes. The Company does not undertake to update any forward-looking statement, forward-looking information or financial outlook that are incorporated by reference herein, except in accordance with applicable securities laws. We seek safe harbor.

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Manhattan Showing with assay results returning uranium grades ranging from 0.72% to 8.10% U3O8 in outcrop grab samples.

Standard Uranium Ltd. (TSXV: STND,OTC:STTDF) (OTCQB: STTDF) (FSE: 9SU0) (‘Standard Uranium’ or the ‘Company’) is pleased to announce final assay results from its 2025 exploration programs the Corvo Uranium Project (‘Corvo’, or the ‘Project’), currently under a three-year earn-in option agreement with Aventis Energy Inc. (‘Aventis’) (CSE: AVE).

From July 4 to July 16, 2025, the Company completed a detailed mapping and sampling program across historical uranium showings and zones of interest on the Project. Assay results confirm uranium mineralization across the Project, including high-grade^* surface mineralization at the Manhattan Showing.

Highlights:

• High-Grade Uranium at Surface: Verification of surficial uranium mineralization across the Project, including the historical Manhattan Showing with assay results returning uranium grades ranging from 0.72% to 8.10% U₃O₈ in outcrop grab samples.

• Discovery of New Radioactive Showings: Scintillometer prospecting uncovered previously undocumented radioactive occurrences across the Project in favorable rock types for uranium and Rare Earth Element (‘REE’) mineralization.

• Ongoing Exploration: An extensive ground gravity survey is scheduled for December 2025, designed to identify density anomalies potentially representing hydrothermal alteration systems coincident with newly refined EM conductor trends across the Project. A diamond drill program is being planned for Q1 2026 to begin testing targets developed and ranked through the successful programs executed in 2025.

‘Our geochemical assays returning the highest uranium grades ever reported on the Project increases our confidence and excitement, as we were able to repeat historic results and identify new areas of mineralization at surface,’ said Sean Hillacre, President & VP Exploration of Standard Uranium. ‘We will continue to bolster our targeting strategy through the December ground gravity program leading into the first drill program on the Project in more than 40 years.’

Figure 1. Regional map of the Corvo Project. The Project is located 60 km due east of Cameco’s McArthur River mine and 45 km northeast of Atha Energy’s Gemini Mineralized Zone (‘GMZ’).

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2025 Prospecting Program – Geochemical Assay Results

Beginning July 4 and concluding July 16, 2025, the Standard Uranium technical team completed a detailed mapping, prospecting, and sampling program to ground-truth historical uranium showings at surface on the Project. Prospecting confirmed several uraniferous outcrops and boulders across the Project, including at the Manhattan showing (0.72% to 8.10% U₃O₈; Figure 2).

A total of 30 outcrop and boulder grab samples were submitted to Saskatchewan Research Council Geoanalytical Laboratories in Saskatoon, SK, an ISO/IEC 17025:2017 and Standards Council of Canada certified analytical laboratory, for whole-rock, uranium, and REE geochemical analysis. Uranium and Total Rare Earth Element Oxides including Yttrium oxide (TREO*) results from 28 radioactive samples are summarized below in Table 1. Oxide TREO* values in Table 1 refer to total amounts of the REE oxides in the lanthanide series plus the chemically similar element Yttrium (Y₂O₃). Parts per million (‘ppm’) values are converted to oxide wt.% values through the applicable conversion factor relating to each REE oxide and then summed³.

Table 1. Corvo 2025 Prospecting Uranium and TREO* Geochemical Assays

Figure 2. Manhattan Showing high-grade samples (Left) Hand sample 244959 – 5.14 wt.% U₃O₈ (Right) Hand sample 214010 – 8.10 wt.% U₃O₈. Scale bars units are metric (cm / mm).

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Corvo Exploration

Supplementary geophysical surveys across the Project have been designed to further refine drill targets for an inaugural drill program in 2026. The Company will complete a high-resolution ground gravity survey across the main conductive trends on the Project, aiming to identify potential hydrothermal alteration halos which could be related to basement-hosted uranium mineralization.

Earlier this year, the Company contracted Axiom Exploration Group Ltd. in partnership with New Resolution Geophysics to carry out a helicopter-borne Xcite time domain electromagnetic and total field magnetic survey over the Corvo Project². The survey totalled approximately 1,380 line-kms with a traverse line spacing of 100 m and tie-line spacing of 1,000 m. The airborne TDEM survey outlines several kilometers of conductive anomalies and magnetic features in bedrock, effectively enhancing the resolution of more than 29 kilometres of conductive trends on the project.

Ongoing geophysical interpretation and modeling is being completed to integrate historical surveys with newly collected datasets, which will provide high-priority drill targets and significantly derisk the Project prior to modern drilling in 2026.

The Company believes the Project is highly prospective for the discovery of shallow, high-grade basement-hosted uranium mineralization akin to the Rabbit Lake deposit and the recently discovered Gemini Mineralized Zone. Located just outside the current margin of the Athabasca Basin, Corvo boasts shallow drill targets with bedrock under minimal cover of glacial till.

Qualified Person Statement

The scientific and technical information contained in this news release has been reviewed, verified, and approved by Sean Hillacre, P.Geo., President and VP Exploration of the Company and a ‘qualified person’ as defined in NI 43-101 – Standards of Disclosure for Mineral Projects.

Samples collected for analysis were sent to SRC Geoanalytical Laboratories in Saskatoon, Saskatchewan for preparation, processing, and ICP-MS or ICP-OES multi-element analysis using total and partial digestion and boron by fusion. Radioactive samples were tested using the ICP1 uranium multi-element exploration package plus boron. All samples marked as radioactive upon arrival to the lab were also analyzed using the U₃O₈ assay (reported in wt.%). SRC is an ISO/IEC 17025:2005 and Standards Council of Canada certified analytical laboratory. Blanks, standard reference materials, and repeats were inserted into the sample stream at regular intervals in accordance with Standard Uranium’s quality assurance/quality control (QA/QC) protocols. All samples passed internal QA/QC protocols and the results presented in this release are deemed complete, reliable, and repeatable.

REE oxide conversion factors³ were verified using the following formulas:
Convert REE (Rare Earth Element) ppm to REO (Rare Earth Oxide): REO % = (ppm / Atomic Weight of REE) * (Molecular Weight of REO / 10,000).

Element-to-oxide conversion factor: Molecular weight of the oxide / atomic weight of the element. For oxides with more than one metal cation, account for the number of cations in the formula.

Historical data disclosed in this news release relating to sampling results from previous operators are historical in nature. Neither the Company nor a qualified person has yet verified this data and therefore investors should not place undue reliance on such data. The Company’s future exploration work may include verification of the data. The Company considers historical results to be relevant as an exploration guide and to assess the mineralization as well as economic potential of exploration projects. Any historical grab samples disclosed are selected samples and may not represent true underlying mineralization.

Natural gamma radiation from rocks reported in this news release was measured in counts per second (‘cps’) using a handheld RS-125 super-spectrometer and RS-120 super-scintillometer. Readers are cautioned that scintillometer readings are not uniformly or directly related to uranium grades of the rock sample measured and should be treated only as a preliminary indication of the presence of radioactive minerals. The RS-125 and RS-120 units supplied by Radiation Solutions Inc. (‘RSI’) have been calibrated on specially designed Test Pads by RSI. Standard Uranium maintains an internal QA/QC procedure for calibration and calculation of drift in radioactivity readings through three test pads containing known concentrations of radioactive minerals. Internal test pad radioactivity readings are known and regularly compared to readings measured by the handheld scintillometers for QA/QC purposes.

References
¹ SMDI# 2052: https://mineraldeposits.saskatchewan.ca/Home/Viewdetails/2052 & Mineral Assessment Report MAW00047: Eagle Plains Resources Inc., 2011-2012
²Standard Uranium Provides Exploration Update Highlighting Results of Gravity and TDEM Surveys on Three Eastern Athabasca Uranium Projects, News Release, March 13, 2025. https://standarduranium.ca/news-releases/standard-uranium-provides-exploration-update-tdem-surveys-on-three-eastern-athabasca-uranium/
³https://www.jcu.edu.au/advanced-analytical-centre/resources/element-to-stoichiometric-oxide-conversion-factors
^*The Company considers uranium mineralization with concentrations greater than 1.0 wt% U₃O₈ to be ‘high-grade’.
^**The Company considers radioactivity readings greater than 65,535 counts per second (cps) on a handheld RS-125 Super-Spectrometer to be ‘off-scale’.
^***The Company considers radioactivity readings greater than 300 counts per second (cps) on a handheld RS-125 Super-Spectrometer to be ‘anomalous’.

About Standard Uranium (TSXV: STND,OTC:STTDF)

We find the fuel to power a clean energy future

Standard Uranium is a uranium exploration company and emerging project generator poised for discovery in the world’s richest uranium district. The Company holds interest in over 235,435 acres (95,277 hectares) in the world-class Athabasca Basin in Saskatchewan, Canada. Since its establishment, Standard Uranium has focused on the identification, acquisition, and exploration of Athabasca-style uranium targets with a view to discovery and future development.

Standard Uranium’s Davidson River Project, in the southwest part of the Athabasca Basin, Saskatchewan, comprises ten mineral claims over 30,737 hectares. Davidson River is highly prospective for basement-hosted uranium deposits due to its location along trend from recent high-grade uranium discoveries. However, owing to the large project size with multiple targets, it remains broadly under-tested by drilling. Recent intersections of wide, structurally deformed and strongly altered shear zones provide significant confidence in the exploration model and future success is expected.

Standard Uranium’s eastern Athabasca projects comprise over 43,185 hectares of prospective land holdings. The eastern basin projects are highly prospective for unconformity related and/or basement hosted uranium deposits based on historical uranium occurrences, recently identified geophysical anomalies, and location along trend from several high-grade uranium discoveries.

Standard Uranium’s Sun Dog project, in the northwest part of the Athabasca Basin, Saskatchewan, is comprised of nine mineral claims over 19,603 hectares. The Sun Dog project is highly prospective for basement and unconformity hosted uranium deposits yet remains largely untested by sufficient drilling despite its location proximal to uranium discoveries in the area.

Cautionary Statement Regarding Forward-Looking Statements

This news release contains ‘forward-looking statements’ or ‘forward-looking information’ (collectively, ‘forward-looking statements’) within the meaning of applicable securities legislation. All statements, other than statements of historical fact, are forward-looking statements and are based on expectations, estimates and projections as of the date of this news release. Forward-looking statements include, but are not limited to, statements regarding: the timing and content of upcoming work programs; geological interpretations; timing of the Company’s exploration programs; and estimates of market conditions.

Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual events or results to differ from those expressed or implied by forward-looking statements contained herein. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Certain important factors that could cause actual results, performance or achievements to differ materially from those in the forward-looking statements are highlighted in the ‘Risks and Uncertainties’ in the Company’s management discussion and analysis for the fiscal year ended April 30, 2025.

Forward-looking statements are based upon a number of estimates and assumptions that, while considered reasonable by the Company at this time, are inherently subject to significant business, economic and competitive uncertainties and contingencies that may cause the Company’s actual financial results, performance, or achievements to be materially different from those expressed or implied herein. Some of the material factors or assumptions used to develop forward-looking statements include, without limitation: that the transaction with the Optionee will proceed as planned; the future price of uranium; anticipated costs and the Company’s ability to raise additional capital if and when necessary; volatility in the market price of the Company’s securities; future sales of the Company’s securities; the Company’s ability to carry on exploration and development activities; the success of exploration, development and operations activities; the timing and results of drilling programs; the discovery of mineral resources on the Company’s mineral properties; the costs of operating and exploration expenditures; the presence of laws and regulations that may impose restrictions on mining; employee relations; relationships with and claims by local communities and indigenous populations; availability of increasing costs associated with mining inputs and labour; the speculative nature of mineral exploration and development (including the risks of obtaining necessary licenses, permits and approvals from government authorities); uncertainties related to title to mineral properties; assessments by taxation authorities; fluctuations in general macroeconomic conditions.

The forward-looking statements contained in this news release are expressly qualified by this cautionary statement. Any forward-looking statements and the assumptions made with respect thereto are made as of the date of this news release and, accordingly, are subject to change after such date. The Company disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by applicable securities laws. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

Neither the TSX-V nor its Regulation Services Provider (as that term is defined in the policies of the TSX-V) accepts responsibility for the adequacy or accuracy of this release.

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