(TheNewswire)

Brossard, Quebec, le 25 février 2026 TheNewswire – CORPORATION Charbone (TSXV: CH,OTC:CHHYF; OTCQB: CHHYF; FSE: K47) (« Charbone » ou la « Société »), un producteur et distributeur nord-américain spécialisé dans l’hydrogène propre Ultra Haute Pureté (« UHP ») et les gaz industriels stratégiques, a le plaisir d’annoncer que, à la suite de son communiqué de presse du 14 janvier 2026, elle a obtenu des commandes supplémentaires auprès d’un client américain existant basé dans l’État de New York.

Le client a passé de nouvelles commandes d’hydrogène propre UHP, produit et distribué par Charbone, et sa première commande d’oxygène UHP. Pendant que les activités de production de Charbone restent axées sur l’hydrogène propre UHP, l’entreprise fournit également des gaz industriels complémentaires tels que l’oxygène, l’hélium et d’autres gaz spéciaux afin de répondre aux besoins de ses clients.

Renforcement de la relation client dans un marché stratégique : l’État de New York

À la suite de l’annonce du 14 janvier 2026 concernant une première commande d’hydrogène propre UHP d’un client américain situé dans l’État de New York, Charbone indique que ce client poursuit sa collaboration avec Charbone. La nouvelle commande d’hydrogène UHP de Charbone, combinée à une première commande d’oxygène UHP, constitue une étape additionnelle dans le déploiement commercial de Charbone aux États-Unis, un marché stratégique pour la croissance future.

Diversification de l’offre UHP : hydrogène et oxygène

Charbone considère que l’ajout d’une commande d’oxygène UHP à son carnet de commandes, en parallèle de l’hydrogène UHP, représente un jalon important pour sa feuille de route : développer une plateforme multi-molécules de gaz industriels UHP, alignée sur les besoins des secteurs technologiques et industriels avancés, notamment dans la « Tech Valley » américaine.

« Ces nouvelles commandes, incluant désormais la distribution et la livraison de l’oxygène UHP, confirment non seulement que la relation avec notre client existant dans l’État de New York se renforce, mais aussi la pertinence de notre stratégie de diversification des gaz industriels UHP, » a déclaré Dave B. Gagnon, PDG de Charbone. « Notre objectif est clair : offrir une fiabilité d’approvisionnement et des standards de pureté de premier ordre, afin de répondre aux exigences les plus élevées des marchés technologiques et industriels en Amérique du Nord. »

Engagement de Momentum Public Relations Inc.

Le 4 février 2026, Charbone a annoncé avoir retenu les services de Momentum Public Relations Inc. (« Momentum ») pour des services liés à ses stratégies de relations avec les investisseurs et les médias. Momentum est une firme de relations publiques et de relations avec les investisseurs établie à Montréal, qui a fait ses preuves en matière d’accompagnement des entreprises émergentes sur les marchés financiers canadiens. Fondée en 2008, Momentum se spécialise dans la conception de programmes ciblés de sensibilisation des investisseurs pour les petites et moyennes capitalisations cotées en bourse, avec une expertise particulière dans le secteur des ressources. Par le biais de communications stratégiques, de la prospection d’investisseurs et de l’engagement sur le marché, Momentum s’efforce d’accroître la visibilité, de renforcer la présence des entreprises et de les mettre en relation avec un plus large réseau d’investisseurs qualifiés. Momentum détient une participation variable dans Charbone et se garde le droit d’utiliser ses propres fonds pour augmenter sa position.

À propos de CORPORATION Charbone

Charbone est un développeur et producteur d’hydrogène propre Ultra Haute Pureté (UHP) doté d’une plateforme de distribution de gaz industriels en pleine expansion. Grâce à une approche modulaire, Charbone se concentre sur le développement d’un réseau d’usines de production d’hydrogène propre en Amérique du Nord et sur certains marchés à l’étranger, en commençant par son projet phare de Sorel-Tracy au Québec. Le modèle intégré de l’entreprise réduit les risques, améliore l’évolutivité et permet de diversifier ses sources de revenus grâce à des partenariats dans le domaine de l’hélium et d’autres gaz de spécialités. Charbone s’engage à soutenir la transition mondiale vers une économie bas carbone en fournissant des solutions d’hydrogène propre et de gaz de spécialités accessibles et décentralisées, tout en soutenant les clients industriels mal desservis en gaz et en accélérant la transition vers une énergie propre locale. Charbone est coté sur la bourse de croissance TSX (TSXV: CH,OTC:CHHYF); sur les marchés OTC (OTCQB: CHHYF); et à la Bourse de Francfort (FSE: K47). Pour plus d’informations, veuillez visiter www.Charbone.com.

Énoncés prospectifs

Le présent communiqué de presse contient des énoncés qui constituent de « l’information prospective » au sens des lois canadiennes sur les valeurs mobilières (« déclarations prospectives »). Ces déclarations prospectives sont souvent identifiées par des mots tels que « a l’intention », « anticipe », « s’attend à », « croit », « planifie », « probable », ou des mots similaires. Les déclarations prospectives reflètent les attentes, estimations ou projections respectives de la direction de Charbone concernant les résultats ou événements futurs, sur la base des opinions, hypothèses et estimations considérées comme raisonnables par la direction à la date à laquelle les déclarations sont faites. Bien que Charbone estime que les attentes exprimées dans les déclarations prospectives sont raisonnables, les déclarations prospectives comportent des risques et des incertitudes, et il ne faut pas se fier indûment aux déclarations prospectives, car des facteurs inconnus ou imprévisibles pourraient faire en sorte que les résultats réels soient sensiblement différents de ceux exprimés dans les déclarations prospectives. Des risques et des incertitudes liés aux activités de Charbone peuvent avoir une incidence sur les déclarations prospectives. Ces risques, incertitudes et hypothèses comprennent, sans s’y limiter, ceux décrits à la rubrique « Facteurs de risque » dans le rapport de gestion de la Société pour la période terminée le 30 septembre 2025, qui peut être consultée sur SEDAR+ à l’adresse www.sedarplus.ca; ils pourraient faire en sorte que les événements ou les résultats réels diffèrent sensiblement de ceux prévus dans les déclarations prospectives.

Sauf si les lois sur les valeurs mobilières applicables l’exigent, Charbone ne s’engage pas à mettre à jour ni à réviser les déclarations prospectives.

Ni la Bourse de croissance TSX ni son fournisseur de services de réglementation (tel que ce terme est défini dans les politiques de la Bourse de croissance TSX) n’acceptent de responsabilité quant à la pertinence ou à l’exactitude du présent communiqué.

Copyright (c) 2026 TheNewswire – All rights reserved.

(TheNewswire)

Brossard, Quebec, February 25, 2026 TheNewswire – Charbone CORPORATION (TSXV: CH,OTC:CHHYF; OTCQB: CHHYF; FSE: K47) (‘Charbone’ or the ‘Company’), a North American producer and distributor specializing in clean Ultra High Purity (‘UHP’) hydrogen and strategic industrial gases, is pleased to announce that, further to its press release dated January 14, 2026, the Company has secured additional orders from an existing U.S. customer based in New York State.

The customer has placed new orders for clean UHP hydrogen, produced and distributed by Charbone, and placed its first order for UHP oxygen. While Charbone‘s production activities remain focused on clean UHP hydrogen, the Company delivers also complementary industrial gases like oxygen, helium, and other specialty gases to support customer requirements.

Strengthening customer relationships in a strategic market: New York State

Following the announcement on January 14, 2026, regarding an initial order for clean UHP hydrogen from a US customer located in New York State, Charbone indicates that this customer is continuing its collaboration with Charbone. The new order for Charbone’s UHP hydrogen, combined with an initial order for UHP oxygen, represents a further step in Charbone’s commercial deployment in the United States, a strategic market for future growth.

Diversification of UHP offerings: hydrogen and oxygen

Charbone considers the addition of an order for UHP oxygen to its order book, alongside UHP hydrogen, to be an important milestone in its roadmap: developing a multi-molecule platform of UHP industrial gases, aligned with the needs of advanced technology and industrial sectors, particularly in the American ‘Tech Valley’.

‘These new orders, now including distribution and delivery of UHP oxygen, confirm not only that the relationship with our existing customer in New York State is strengthening, but also the relevance of our strategy to diversify into UHP industrial gases,’ said Dave Gagnon, Charbone’s Chief Executive Officer and Chairman of the Board. ‘Our objective is clear: to offer reliable supply and first-class purity standards in order to meet the highest demands of the technology and industrial markets in North America.‘

Momentum Public Relations Inc. Appointment

On February 4, 2026, Charbone announced that it had retained the services of Momentum Public Relations Inc. (‘Momentum‘), in relation to investor and public relations strategies. Momentum is a Montreal-based public relations and investor relations firm with a proven track record of supporting emerging companies in the Canadian financial markets. Founded in 2008, Momentum specializes in designing targeted investor outreach programs for listed small and mid-cap companies, with expertise in the resource sector. Through strategic communications, investor outreach, and market engagement, Momentum strives to increase companies’ visibility, strengthen their presence, and connect them with a broader network of qualified investors. Momentum holds a variable stake in Charbone and reserves the right to use its own funds to increase its position.

About Charbone CORPORATION

Charbone is a developer and producer of clean Ultra High Purity (UHP) hydrogen with a growing industrial gas distribution platform. Through a modular approach, Charbone is focused on developing a network of clean hydrogen production facilities throughout North America and select markets abroad, starting with its flagship Sorel-Tracy project in Quebec. The Company’s integrated model reduces risk, enhances scalability, and enables diversified revenue streams through partnerships in helium and other specialty gases. Charbone is committed to supporting the global transition to a lower-carbon economy by providing accessible, decentralized clean hydrogen and specialty gas solutions while supporting underserved industrial gas customers and accelerating the shift to localized clean energy. Charbone is listed on the TSX Venture Exchange (TSXV: CH,OTC:CHHYF), the OTC Markets (OTCQB: CHHYF), and the Frankfurt Stock Exchange (FSE: K47). Visit www.Charbone.com.

Forward-Looking Statements

This news release contains statements that are ‘forward-looking information’ as defined under Canadian securities laws (‘forward-looking statements’). These forward-looking statements are often identified by words such as ‘intends’, ‘anticipates’, ‘expects’, ‘believes’, ‘plans’, ‘likely’, or similar words. The forward-looking statements reflect management’s expectations, estimates, or projections concerning future results or events, based on the opinions, assumptions and estimates considered reasonable by management at the date the statements are made. Although Charbone believes that the expectations reflected in the forward-looking statements are reasonable, forward-looking statements involve risks and uncertainties, and undue reliance should not be placed on forward-looking statements, as unknown or unpredictable factors could cause actual results to be materially different from those reflected in the forward-looking statements. The forward-looking statements may be affected by risks and uncertainties in the business of Charbone. These risks, uncertainties and assumptions include, but are not limited to, those described under ‘Risk Factors’ in the Corporation’s Management’s Discussion & Analysis for the period ended September 30, 2025, which is available on SEDAR+ at www.sedarplus.ca; they could cause actual events or results to differ materially from those projected in any forward-looking statements.

Except as required under applicable securities legislation, Charbone undertakes no obligation to publicly update or revise forward-looking information.

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

Copyright (c) 2026 TheNewswire – All rights reserved.

Cardiol Therapeutics Inc. (NASDAQ: CRDL) (TSX: CRDL) (‘Cardiol’ or the ‘Company’), a late-stage life sciences company focused on advancing the development of anti-inflammatory and anti-fibrotic therapies for heart disease, is pleased to announce that it will participate at the upcoming TD Cowen 46th Annual Health Care Conference in Boston, MA. Members of management will present on March 4, 2026, at 10:30 a.m. EST.

A live webcast of the Company’s presentation, as well as a webcast replay will be available under ‘Events & Presentations’ in the Investors section of the Cardiol website (www.cardiolrx.com/investors/events-presentations/).

About Cardiol Therapeutics

Cardiol Therapeutics Inc. (NASDAQ: CRDL) (TSX: CRDL) is a late-stage life sciences company focused on advancing the development of anti-inflammatory and anti-fibrotic therapies for heart disease. The Company’s lead small-molecule drug candidate, CardiolRx, modulates inflammasome pathway activation, an intracellular process known to play an important role in the development and progression of inflammation and fibrosis associated with pericarditis, myocarditis, and heart failure.

The MAVERIC Program is evaluating CardiolRx for the treatment of recurrent pericarditis, an inflammatory disease of the pericardium associated with symptoms including debilitating chest pain, shortness of breath, and fatigue, which can lead to physical limitations, reduced quality of life, emergency department visits, and hospitalizations. The program comprises the completed Phase II MAvERIC-Pilot study (NCT05494788) and the ongoing pivotal Phase III MAVERIC trial (NCT06708299). The U.S. FDA has granted Orphan Drug Designation to CardiolRx for the treatment of pericarditis, including recurrent pericarditis.

The ARCHER Program is also studying CardiolRx, specifically in acute myocarditis-an important cause of acute and fulminant heart failure in young adults and a leading cause of sudden cardiac death in individuals under 35 years of age. The program comprises the completed Phase II ARCHER study (NCT05180240), which evaluated the safety, tolerability, and efficacy of CardiolRx in this patient population.

The Company is also developing CRD-38, a novel, subcutaneously administered drug formulation intended for the treatment of inflammatory heart disease, including heart failure-a leading cause of death and hospitalization in the developed world, with associated healthcare costs in the United States exceeding US$30 billion per year.

For more information about Cardiol Therapeutics, please visit cardiolrx.com.

Cautionary statement regarding forward-looking information:

This news release contains ‘forward-looking information’ within the meaning of applicable securities laws. All statements, other than statements of historical fact, that address activities, events, or developments that Cardiol believes, expects, or anticipates will, may, could, or might occur in the future are ‘forward-looking information’. Forward-looking information contained herein may include, but is not limited to statements regarding the Company’s focus on developing anti-inflammatory and anti-fibrotic therapies for the treatment of heart disease, the Company’s intended clinical studies and trial activities and timelines associated with such activities, including the Company’s plan to complete the Phase III study in recurrent pericarditis with CardiolRx, and the Company’s plan to advance the development of CRD-38, a novel subcutaneous formulation intended for the treatment of inflammatory heart disease, including heart failure, including through the initiation of the first-in-human clinical evaluation. Forward-looking information contained herein reflects the current expectations or beliefs of Cardiol based on information currently available to it and is based on certain assumptions and is also subject to a variety of known and unknown risks and uncertainties and other factors that could cause the actual events or results to differ materially from any future results, performance or achievements expressed or implied by the forward-looking information, and are not (and should not be considered to be) guarantees of future performance. These risks and uncertainties and other factors include the risks and uncertainties referred to in the Company’s Annual Information Form filed with the Canadian securities administrators and U.S. Securities and Exchange Commission on March 31, 2025, available on SEDAR+ at sedarplus.ca and EDGAR at sec.gov, as well as the risks and uncertainties associated with product commercialization and clinical studies. These assumptions, risks, uncertainties, and other factors should be considered carefully, and investors should not place undue reliance on the forward-looking information, and such information may not be appropriate for other purposes. Any forward-looking information speaks only as of the date of this press release and, except as may be required by applicable securities laws, Cardiol disclaims any intent or obligation to update or revise such forward-looking information, whether as a result of new information, future events, or results, or otherwise. Investors are cautioned not to rely on these forward-looking statements.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/285225

Oreterra Metals Corp. (TSXV: OTMC,OTC:RMIOD) (OTCID: OTMCF) (OTCID: RMIOD) (FSE: D4R0) (WKN: A421RQ) (‘Oreterra’ or the ‘Company’) (previously, ‘Romios Gold Resources Inc.’) is pleased to announce that it will be exhibiting at the 2026 Prospectors & Developers Association of Canada Annual Convention (PDAC), the world’s premier mineral exploration & mining event. We invite our shareholders and conference delegates to visit us at booth #2717 in the Investor’s Exhange.

The in-person event will be held at the Metro Toronto Convention Centre (MTCC) from Sunday, March 1^st to Wednesday, March 4th, 2026.

Oreterra’s CEO, Kevin Keough; President, Stephen Burega; and Vice-President, Exploration, John Biczok, look forward to discussing the Company’s plans for the first-ever drilling of the large scale Trek South porphyry copper-gold prospect in BC’s Golden Triangle in the upcoming field season.

Recent news includes:

About Oreterra Metals Corp.

Oreterra Metals Corp. commenced trading on February 2, 2026, under the new ticker OTMC, following a months-long effort to restructure the former Romios Gold Resources Inc.. Management took on the task because it believes the Company’s wholly-owned Trek South porphyry copper-gold prospect represents, based upon the impressive results of the spectrum of geosciences applied to the target area to date, among the finest new targets of its kind in BC’s Golden Triangle. The Company recently released (news, January 22, 2026) a National Instrument 43-101 Technical Report for the Trek property which recommends two initial phases of drilling at Trek South, for execution in the approaching 2026 field season. A copy of the Technical Report is available on the Company’s website at www.oreterra.com, and on the Company’s SEDAR+ issuer profile at www.sedarplus.ca.

Additional wholly-owned Company property interests include two former producers in Nevada: the Kinkaid claims in the Walker Lane trend covering numerous shallow Au-Ag-Cu workings over what is believed to be one or more porphyry centres (source: J.Biczok, P.Geo, June 2025, Kinkaid Gold-Copper-Silver Project, www.oreterra.com), and the Scossa mine property in the Sleeper trend which is a former high-grade gold producer (source: J.Biczok, P.Geo, July 2025, Scossa Historic Gold Mine Property, www.oreterra.com). The Company also holds a 100% interest in the large Lundmark-Akow Lake Au-Cu property adjacent to the northwest of the Musselwhite Mine in northwestern Ontario, where drilling by the Company has produced highly encouraging, broad VMS-style Au-Cu intersections.

For further information visit www.oreterra.com or contact:

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

Cautionary Statement Regarding Forward-Looking Information

This news release includes certain ‘forward-looking statements’ which are not comprised of historical facts. Forward-looking statements include estimates and statements that describe the Company’s future plans, objectives or goals, including words to the effect that the Company or management expects a stated condition or result to occur. Forward-looking statements may be identified by such terms as ‘believes’, ‘anticipates’, ‘expects’, ‘estimates’, ‘may’, ‘could’, ‘would’, ‘will’, or ‘plan’. Since forward-looking statements are based on assumptions and address future events and conditions, by their very nature they involve inherent risks and uncertainties. Although these statements are based on information currently available to the Company, the Company provides no assurance that actual results will meet management’s expectations. Risks, uncertainties and other factors involved with forward-looking information could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Factors that could cause actual results to differ materially from such forward-looking information include, but are not limited to failure to identify mineral resources, delays in obtaining or failures to obtain required governmental, environmental or other project approvals, political risks, inability to fulfill the duty to accommodate First Nations, uncertainties relating to the availability and costs of financing needed in the future, changes in equity markets, inflation, changes in exchange rates, fluctuations in commodity prices, delays in the development of projects, capital and operating costs varying significantly from estimates and the other risks involved in the mineral exploration and development industry, and those risks set out in the Company’s public documents filed on SEDAR. Although the Company believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. The Company disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/285224

Rio Silver Inc. (‘Rio Silver’ or the ‘Company’) (TSX-V: RYO | OTC: RYOOF) is pleased to announce a non-brokered private placement financing for gross proceeds of up to $3,000,000 (the ‘Offering’).

Under the Offering, subject to regulatory approval, the Company intends to issue up to 8,571,429 units (the ‘Units’) at a price of $0.35 per Unit. Each Unit will consist of one common share of the Company and one-half (1/2) of one common share purchase warrant (each whole warrant, a ‘Warrant’). Each Warrant will entitle the holder to acquire one additional common share of the Company at a price of $0.50 per share for a period of 24 months from the date of issuance, subject to accelerated expiry in the event the common shares of the Company trade at a price greater than $0.75 for fifteen consecutive trading days.

The net proceeds from the Offering are expected to be used for advancement of the Company’s Maria Norte Project in Peru, access development, metallurgical programs, and for general working capital purposes.

Closing and Regulatory Matters

Closing of the Offering is subject to receipt of all necessary approvals, including approval of the TSX Venture Exchange. All securities issued under the Offering will be subject to a statutory hold period in accordance with applicable securities laws, expiring four months and one day from the date of issuance.

The Company may pay finders’ fees in connection with the Offering in accordance with the policies of the TSX Venture Exchange.

The securities offered have not been and will not be registered under the United States Securities Act of 1933, as amended (the ‘U.S. Securities Act’), or any state securities laws, and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements. This news release does not constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction.

About Rio Silver Inc.

Rio Silver Inc. (TSX-V: RYO | OTC: RYOOF) is a Canadian resource company advancing high-grade, silver-dominant assets in Peru, the world’s second-largest silver producer. The Company is focused on near-term development opportunities within proven mineral belts and is supported by a seasoned technical and operational team with deep experience in Peruvian geology, underground mining, and district-scale exploration. With a clear development strategy and a growing portfolio of highly prospective silver assets, Rio Silver is establishing the foundation to become one of Peru’s next emerging silver producers.

Learn more at www.riosilverinc.com

Stay Connected with Rio Silver
Investors and stakeholders are encouraged to follow Rio Silver for the latest company updates, project milestones, and event announcements across the Company’s official social media channels:

By following Rio Silver’s official channels, investors can stay informed as the Company advances its silver-dominant projects and executes on key development milestones.

ON BEHALF OF Rio Silver INC.

Chris Verrico
Director, President and Chief Executive Officer

To learn more or engage directly with the Company, please contact:
Christopher Verrico, President and CEO
Tel: (604) 762-4448
Email: chris.verrico@riosilverinc.com
Website: www.riosilverinc.com

Cautionary Note Regarding Forward-Looking Information

This news release contains ‘forward-looking statements’ within the meaning of applicable Canadian securities laws. Forward-looking statements include, but are not limited to, statements regarding anticipated development activities, underground access timing, permitting progress, community engagement, processing strategies, and the Company’s ability to advance toward potential production and cash flow. Forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially. Readers are cautioned not to place undue reliance on forward-looking statements. Rio Silver undertakes no obligation to update such statements except as required by law.

Neither the TSX Venture Exchange nor its Regulation Services Provider accepts responsibility for the adequacy or accuracy of this release.

Stallion Uranium Corp. (the ‘Company’ or ‘Stallion’) (TSX-V: STUD; OTCQB: STLNF; FSE: FE0) is pleased to announce the completion of an extension to its previous ground gravity survey along the Coyote Corridor, located within the Southwestern Athabasca Basin Joint Venture (‘JV’) Project in partnership with Atha Energy Corp. (TSX-V: SASK).

The recently completed program represents a direct extension of the Company’s original gravity grid and was designed to expand coverage over gravity responses observed along the margins of the initial survey area. The objective of the extension was to determine whether these edge anomalies form part of a larger, continuous gravity feature associated with the interpreted structural corridor at Coyote.

Data from the expanded survey is currently undergoing processing, quality control, and preliminary modelling. The Company will provide results once interpretation has been completed.

Highlights:

• Significant gravity low anomaly identified, closely resembling the geophysical signatures of NexGen Energy’s Arrow Deposit and other significant discoveries in the Athabasca Basin
• Structural and geophysical features align with those of the Arrow Deposit and PCE discovery, reinforcing the potential for Tier-1 uranium mineralization
• Gravity anomaly located in a structurally complex corridor, characterized by intersecting conductors and breaks, which are prime settings for uranium deposition
• Ongoing 3D Inversion of Ground Gravity to identify depth and shape of the gravity anomaly

‘The completion of this gravity extension is an important step in systematically advancing the Coyote Target,’ said Matthew Schwab, CEO of Stallion Uranium. ‘Expanding the grid ensures we fully evaluate gravity responses identified at the edges of the initial survey and maintain a disciplined, data-driven approach to exploration.’

Darren Slugoski, Vice President Exploration, added,

‘This extension allows us to properly assess the continuity of gravity features along the structural corridor before finalizing drill targeting. With data processing underway and a potential eastern grid about to commence, we continue to build a comprehensive geophysical dataset across the broader Coyote trend.’

Figure 1: Ground Gravity Survey Location showing Extension of Corridor to the SW

Survey Extension Overview:

The gravity survey extension increases overall coverage across the Coyote structural corridor and enhances density control along strike and across interpreted conductive breaks. The combined original and extended grid now provides improved resolution of subsurface density variations that may be associated with alteration and basement structural complexity.

Gravity surveys are a key component of Stallion’s integrated exploration approach, as gravity lows within the Athabasca Basin are commonly associated with hydrothermal alteration systems developed along graphitic basement structures.

The survey encompassed a total area of 2,097 hectares, with 2,226 gravity stations strategically placed to detect subsurface variations in density that may indicate uranium alteration. The results revealed a substantial gravity low anomaly, a hallmark feature associated with large-scale uranium deposits, such as NexGen Energy’s Arrow Deposit. The Arrow Deposit, one of the most significant uranium discoveries in the Athabasca Basin, shares multiple geological and geophysical similarities with the Coyote Target, strengthening confidence in the potential for a high-grade uranium discovery.

Figure 2: Phase 1 2026 Drilling Stages

TDEM Plate Traces Over Ground Gravity Inversion (-25m asl)

About the Ground Gravity Survey:

Concluding February 10, 2026, MWH Geo-Surveys (Canada) Ltd. carried out a gravity survey at the Coyote Target in Saskatchewan. The survey utilized a customized L&R digital, electronic feedback gravity meter, operated via proprietary controller software. These advanced gravity meters, incorporating electronic levels and electronic nulling, ensure fast, accurate, and reliable readings, particularly in cold-weather conditions.

At each gravity station, GControl software, developed by MWH Geo-Surveys, recorded gravity samples at 1-second intervals. The resultant average of these readings was used as the final gravity measurement, significantly reducing high-frequency noise caused by wind and ground motion. Additionally, GControl calculated real-time, location-specific tidal corrections during data collection, enhancing the accuracy and reliability of the survey results.

With a typical mean data accuracy of 0.02 mgals, MWH Geo-Surveys continues to set the standard for high-resolution gravity surveys, delivering reliable results for resource exploration and geophysical studies.

Qualifying Statement:

The foregoing scientific and technical disclosures for Stallion Uranium have been reviewed and approved by Darren Slugoski, P.Geo., VP Exploration, a registered member of the Professional Engineers and Geoscientists of Saskatchewan. Mr. Slugoski is a Qualified Person as defined by National Instrument 43-101.

About Stallion Uranium Corp.:

Stallion Uranium is working to ‘Fuel the Future with Uranium’ through the exploration of roughly 1,700 sq/km in the Athabasca Basin, home to the largest high-grade uranium deposits in the world. The company, with JV partner Atha Energy holds the largest contiguous project in the Western Athabasca Basin adjacent to multiple high-grade discovery zones. With a commitment to responsible exploration and cutting-edge technology such as the use of the proprietary Haystack TI technology, Stallion is positioned to play a key role in the future of clean energy.

Our leadership and advisory teams are comprised of uranium and precious metals exploration experts with the capital markets experience and the technical talent for acquiring and exploring early-stage properties. For more information visit stallionuranium.com.

On Behalf of the Board of Stallion Uranium Corp.:

Matthew Schwab
CEO and Director

Corporate Office:
700 – 838 West Hastings Street,
Vancouver, British Columbia,
V6C 0A6

T: 604-551-2360
info@stallionuranium.com

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

This news release contains forward-looking statements and forward-looking information within the meaning of Canadian securities legislation (collectively, ‘forward-looking statements’) that relate to the Company’s current expectations and views of future events. Any statements that express, or involve discussions as to, expectations, beliefs, plans, objectives, assumptions or future events or performance (often, but not always, through the use of words or phrases such as ‘will likely result’, ‘are expected to’, ‘expects’, ‘will continue’, ‘is anticipated’, ‘anticipates’, ‘believes’, ‘estimated’, ‘intends’, ‘plans’, ‘forecast’, ‘projection’, ‘strategy’, ‘objective’ and ‘outlook’) are not historical facts and may be forward-looking statements and may involve estimates, assumptions and uncertainties which could cause actual results or outcomes to differ materially from those expressed in such forward-looking statements. No assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this material change report should not be unduly relied upon. These statements speak only as of the date they are made.

Forward-looking statements are based on a number of assumptions and are subject to a number of risks and uncertainties, many of which are beyond the Company’s control, which could cause actual results and events to differ materially from those that are disclosed in or implied by such forward-looking statements. The Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by law. New factors emerge from time to time, and it is not possible for the Company to predict all of them or assess the impact of each such factor or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statement. Any forward-looking statements contained in this presentation are expressly qualified in their entirety by this cautionary statement.

Photos accompanying this announcement are available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/ae0931c7-905d-4a0b-8c65-1ef2dd395c8b
https://www.globenewswire.com/NewsRoom/AttachmentNg/a2a9fd9c-0902-400e-a89e-3ff51800b793

Rio Silver Inc. (‘Rio Silver’ or the ‘Company’) (TSX-V: RYO | OTC: RYOOF) is pleased to invite current and prospective investors to meet with management at the Prospectors & Developers Association of Canada (PDAC) Convention 2026, the foremost global mining and mineral exploration conference.

The PDAC Convention 2026 will be held at the Metro Toronto Convention Centre, South Building, located at 222 Bremner Blvd, Toronto, Ontario.

Rio Silver will be exhibiting at Booth 3013 and welcomes shareholders, institutional investors, analysts, and industry participants to connect directly with management during the conference.

Event Details:

PDAC 2026 – Metro Toronto Convention Centre, South Building
222 Bremner Blvd, Toronto, Ontario

Sunday, March 1: 10:00 am to 5:00 pm
Monday, March 2: 10:00 am to 5:00 pm
Tuesday, March 3: 10:00 am to 5:00 pm
Wednesday, March 4: 9:00 am to 12:00 pm

Investors are encouraged to visit Booth 3013 for a comprehensive update on Rio Silver’s advancement of its silver-dominant Maria Norte Project in Peru.

What Investors Can Expect

Management will be available to discuss:

• Progress at the silver-dominant Maria Norte Project
• Recent community authorization milestones
• Advancing metallurgical programs and processing optimization
• Access preparation and staged development initiatives
• District-scale exploration potential

PDAC is globally recognized as the leading gathering of mining companies, capital markets participants, and technical experts. The convention provides a premier forum for direct engagement and in-depth discussion.

‘PDAC is one of the most important gatherings in the global mining industry, and we genuinely look forward to meeting with shareholders, prospective investors, and industry participants in person,’ said Chris Verrico, President and Chief Executive Officer of Rio Silver. ‘We are excited to share the progress we’ve made at Maria Norte, outline our clear path forward, and discuss the opportunity we see in advancing a silver-dominant project within a proven mining district. We welcome anyone attending PDAC to visit us and connect directly with our team.’

Why This Matters to Investors

As Rio Silver advances its high-grade, silver-dominant asset in Peru, maintaining strong engagement with the global mining investment community remains a core part of the Company’s capital markets strategy. PDAC 2026 provides an important opportunity to broaden awareness, strengthen investor relationships, and communicate execution milestones directly to the market.

We look forward to seeing you there!

For additional information about the PDAC Convention, visit:
https://pdac.ca/convention-2026

About Rio Silver Inc.

Rio Silver Inc. (TSX-V: RYO | OTC: RYOOF) is a Canadian resource company advancing high-grade, silver-dominant assets in Peru, the world’s second-largest silver producer. The Company is focused on near-term development opportunities within proven mineral belts and is supported by a seasoned technical and operational team with deep experience in Peruvian geology, underground mining, and district-scale exploration. With a clear development strategy and a growing portfolio of highly prospective silver assets, Rio Silver is establishing the foundation to become one of Peru’s next emerging silver producers.

Learn more at www.riosilverinc.com

Stay Connected with Rio Silver
Investors and stakeholders are encouraged to follow Rio Silver for the latest company updates, project milestones, and event announcements across the Company’s official social media channels:

By following Rio Silver’s official channels, investors can stay informed as the Company advances its silver-dominant projects and executes on key development milestones.

ON BEHALF OF Rio Silver INC.

Chris Verrico
Director, President and Chief Executive Officer

To learn more or engage directly with the Company, please contact:
Christopher Verrico, President and CEO
Tel: (604) 762-4448
Email: chris.verrico@riosilverinc.com
Website: www.riosilverinc.com

Cautionary Note Regarding Forward-Looking Information

This news release contains ‘forward-looking statements’ within the meaning of applicable Canadian securities laws. Forward-looking statements include, but are not limited to, statements regarding anticipated development activities, underground access timing, permitting progress, community engagement, processing strategies, and the Company’s ability to advance toward potential production and cash flow. Forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially. Readers are cautioned not to place undue reliance on forward-looking statements. Rio Silver undertakes no obligation to update such statements except as required by law.

Neither the TSX Venture Exchange nor its Regulation Services Provider accepts responsibility for the adequacy or accuracy of this release.