• Rock Tech Lithium hat mit Bounty Gold Corp. und Last Resort Resources Ltd. eine Optionsvereinbarung zum Erwerb einer 100-prozentigen Beteiligung am Victory-Projekt abgeschlossen, einem 9.875 Hektar großen Lithium-Explorationsgebiet im Nordwesten Ontarios, .

• Das Victory-Projekt beherbergt zwei bekannte spodumenführende LCT-Pegmatitvorkommen an der Oberfläche. Selektive Stichproben ergaben Werte von bis zu 5,11 % Li₂O am Last-Resort-Pegmatit und bis zu 3,48 % Li₂O am Bounty-Pegmatit.

• Die beiden bekannten spodumenführenden Vorkommen liegen etwa 6 Kilometer voneinander entfernt und definieren ein breites lineares Explorationsgebiet.

• Das Grundstück profitiert von der Nähe zu wichtiger Infrastruktur, darunter der Trans-Canada Highway, Schienenanbindung, elektrische Übertragungsinfrastruktur und eine Erdgaspipeline, die Explorationsaktivitäten und, sofern durch zukünftige Explorationsergebnisse und technische Studien gerechtfertigt, potenzielle zukünftige Entwicklungsmöglichkeiten unterstützen.

• Das Victory-Projekt stellt einen frühen Schritt in Rock Techs regionaler Konsolidierungsstrategie dar, die auf den Aufbau einer breiteren Lithium-Lieferkette in Ontario abzielt, um zukünftigen wirtschaftlichen Wohlstand und fortgesetzte Souveränität zu unterstützen, verankert durch Georgia Lake und verbunden mit dem geplanten Red Rock Konverter.

Toronto, Ontario – 22. Juni 2026 – Rock Tech Lithium Inc.(„Rock Tech“ oder das „Unternehmen“) (TSX-V: RCK) (OTCQX: RCKTF) gibt bekannt, dass das Unternehmen eine Optionsvereinbarung vom 17. Juni 2026 (die „Optionsvereinbarung“) mit Bounty Gold Corp. („Bounty“) und Last Resort Resources Ltd. („Last Resort“) zum Erwerb einer 100-prozentigen Beteiligung am Victory-Projekt (das „Victory-Projekt“, das „Projekt“ oder das „Grundstück“) abgeschlossen hat, einem 9.875 Hektar großen Lithium-Explorationsgebiet, das etwa 45 km östlich von Kenora im Nordwesten Ontarios liegt. Bei erfolgreicher Exploration und vorbehaltlich weiterer technischer Bewertung könnte das Victory-Projekt eine potenzielle zukünftige Quelle für lithiumhaltige Mineralien für Rock Techs geplante Made-in-Ontario-Lithium-Lieferkette darstellen und das EV- und Batterie-Ökosystem der Provinz sowie ihre aufstrebenden Sektoren für fortgeschrittene Fertigung und Verteidigung unterstützen.

Victory ergänzt das Georgia-Lake-Projekt und den geplanten Red Rock Konverter des Unternehmens, indem es ein weiteres Lithium-Explorationsgebiet im frühen Stadium zum Ontario-Portfolio des Unternehmens hinzufügt. Das Grundstück beherbergt zwei bekannte spodumenführende Lithium-Cäsium-Tantal-Pegmatitvorkommen („LCT“) an der Oberfläche und befindet sich in der Nähe des Trans-Canada Highway und einer nahegelegenen CPKC-Schienenanbindung. Rock Tech ist der Ansicht, dass das Grundstück vielversprechende Explorationsmöglichkeiten bietet und, bei erfolgreicher Weiterentwicklung, eine potenzielle zukünftige Quelle für Spodumen-Rohstoff für die breitere Mine-to-Converter-Strategie des Unternehmens in Ontario darstellen könnte, vorbehaltlich erfolgreicher Exploration und weiterer technischer Bewertung.

Die Entwicklung heimischer Lithium-Rohstoffquellen gewinnt zunehmend an Bedeutung, da Ontario, Kanada und verbündete Volkswirtschaften sichere, inländische Lieferketten für kritische Mineralien aufbauen wollen. Durch die Kombination von Explorations- und Entwicklungsmöglichkeiten mit nachgelagerter Konversionskapazität will Rock Tech die Abhängigkeit von Übersee-Verarbeitung verringern und gleichzeitig das Wachstum einer sicheren nordamerikanischen Lithium-Lieferkette unterstützen, die dem EV- und Batterie-Ökosystem dient und kritische Materialien für aufstrebende Sektoren der fortgeschrittenen Fertigung und Verteidigung liefert.

Explorationspotenzial in infrastrukturnaher Lage

Das Victory-Projekt beherbergt zwei bekannte spodumenführende Pegmatitvorkommen: den Last-Resort-Pegmatit und den Bounty-Pegmatit. Diese Vorkommen enthalten festgestellte spodumenführende Pegmatitmineralisierung an der Oberfläche und bieten mehrere Ziele für die zukünftige Exploration.

Der Last-Resort-Pegmatit ist das vorrangige Ziel des Unternehmens. Selektive Stichproben aus dem Vorkommen ergaben Werte von bis zu 5,11 % Li₂O. Das Vorkommen wurde an der Oberfläche über eine Streichlänge von etwa 200 Metern und eine Breite von bis zu etwa 30 Metern kartiert. Das Vorkommen wurde nicht durch Bohrungen getestet, und das Ausmaß der Mineralisierung über die derzeit kartierte Ausdehnung hinaus, einschließlich seiner Tiefenausdehnung, Gehaltkontinuität und Gesamtgeometrie, wurde nicht festgestellt. Zusätzliche Exploration, einschließlich Bohrungen, wird erforderlich sein, um Ausmaß, Kontinuität und Bedeutung der beobachteten Mineralisierung zu bewerten.

Der Bounty-Pegmatit, der etwa 6 km vom Last-Resort-Pegmatit entfernt liegt, wurde an der Oberfläche über eine Streichlänge von etwa 375 Metern und eine Breite von bis zu etwa 60 Metern kartiert. Spodumenführende Proben aus dem Bounty-Vorkommen ergaben Werte von bis zu 3,48 % Li₂O. Das Vorkommen wurde nicht durch Bohrungen getestet, und seine Tiefenausdehnung, Gehaltkontinuität und Gesamtgeometrie wurden nicht festgestellt.

Das etwa 6 km lange lineare Gebiet zwischen den beiden bekannten spodumenführenden Vorkommen ist weitgehend unerforscht und wird durch zukünftige Explorationsprogramme bewertet. Rock Tech beabsichtigt, diesen Korridor durch stufenweise Untersuchungen vor Ort zu bewerten, einschließlich Prospektion, geologischer Kartierung, Probenahme und, vorbehaltlich der Ergebnisse, gezielter Bohrungen. Obwohl eine mineralisierte Kontinuität zwischen den Last-Resort- und Bounty-Vorkommen nicht nachgewiesen wurde, stellt der Korridor einen logischen Schwerpunkt für zukünftige Exploration dar.

Strategische Einbindung in Rock Techs Ontario-Lithium-Plattform

Rock Techs Ontario-Strategie wird durch das Georgia-Lake-Projekt und den geplanten Red Rock Konverter getragen. Die Hinzunahme des Projekts verschafft dem Unternehmen zusätzliche Möglichkeiten zur Lithium-Exploration im Nordwesten Ontarios und ergänzt damit seine bestehende Vermögenswerte in der Provinz.

Das Georgia-Lake-Projekt und das Victory-Projekt sind separate Mineralgrundstücke. Informationen, Mineralisierung, Mineralressourcen, Mineralreserven und Explorationsergebnisse in Bezug auf das Georgia-Lake-Projekt sind nicht notwendigerweise repräsentativ für die Mineralisierung, das Explorationspotenzial oder zukünftige Ergebnisse des Victory-Projekts.

Victory fügt sich in Rock Techs breitere Strategie ein, eine regionale Lithium-Plattform rund um infrastrukturnahe Vermögenswerte aufzubauen, die in Ontarios bestehendes Transportnetzwerk integriert werden können. Ähnlich wie Georgia Lake profitiert das Victory-Projekt von der Nähe zu bestehender Straßen- und Schieneninfrastruktur, einschließlich des Trans-Canada Highway und nahegelegener CPKC-Schienenanbindung. Diese Eigenschaften sind wichtig für Rock Techs Entwicklungsansatz, der sich auf die Identifizierung von Vermögenswerten konzentriert, die durch stufenweise Explorationsprogramme bewertet werden können und, sofern durch zukünftige Explorationsergebnisse und technische Studien gerechtfertigt, für eine weitere Entwicklung in Betracht gezogen werden.

Das Projekt liegt etwa fünf Autostunden vom geplanten Red Rock Konverter von Rock Tech entfernt und schafft eine geografische Verbindung innerhalb der Mine-to-Converter-Strategie des Unternehmens in Ontario. Bei erfolgreicher zukünftiger Exploration und wenn nachfolgende technische Studien eine weitere Entwicklung des Projekts unterstützen, könnte Victory Rock Tech eine zusätzliche Optionalität hinsichtlich der zukünftigen Spodumen-Rohstoffversorgung bieten. Potenzielle Entwicklungs- und Verarbeitungsalternativen, einschließlich externer Verarbeitung, Integration mit bestehender oder zukünftiger regionaler Infrastruktur oder anderer projektspezifischer Wege, würden erst nach zusätzlicher Exploration, technischen Studien und metallurgischen Tests bewertet.

Die Akquisition von Victory spiegelt Rock Techs disziplinierten Ansatz zum Aufbau einer regionalen Lithium-Plattform im Nordwesten Ontarios wider. Durch die Sicherung vielversprechender Lithium-Vermögenswerte in der Nähe bestehender Infrastruktur und in Reichweite des geplanten Red Rock Konverters stärkt das Unternehmen weiterhin die Grundlagen einer Made-in-Ontario-Lieferkette für kritische Mineralien, die in der Lage ist, zukünftige Batterie- und fortgeschrittene Fertigungsindustrien zu unterstützen.

„Das Victory-Projekt fügt sich nahtlos in unsere Strategie zum Aufbau einer Made-in-Ontario-Lithium-Lieferkette ein“, sagt Mirco Wojnarowicz, CEO von Rock Tech. „Ontario verfügt über die Ressourcen, die Infrastruktur und die bestehende industrielle Basis, um ein führender Standort für Batteriematerialien zu werden, auch für die Sektoren Elektrofahrzeuge, fortschrittliche Fertigung und Verteidigung. Diese strategische Akquisition verschafft Rock Tech Zugang zu einem vielversprechenden spodumenführenden Grundstück mit starken Infrastrukturmerkmalen, während die Optionsstruktur es uns ermöglicht, das Projekt durch stufenweise Exploration zu testen, bevor wir den Großteil der Akquisitionsgegenleistung binden.“

Transaktionsbedingungen

Gemäß der Optionsvereinbarung kann Rock Tech eine 100-prozentige Beteiligung am Victory-Projekt erwerben, indem Gesamtzahlungen von 600.000 CAD in bar geleistet und Stammaktien von Rock Tech im Wert von 400.000 CAD über einen Zeitraum von 24 Monaten ausgegeben werden. Die Zahlungen sind gestaffelt: 150.000 CAD in bar und 100.000 CAD in Aktien sind bei Unterzeichnung fällig, der Restbetrag ist in zwei weiteren Tranchen zum 12-Monats- und 24-Monats-Jahrestag der Optionsvereinbarung zahlbar.

Die Verkäufer behalten eine Net-Smelter-Return-Royalty von 2,0 % am Victory-Projekt. Rock Tech hat das Recht, 1,0 % der NSR-Royalty jederzeit vor einer Bauentscheidung für 1,0 Mio. CAD zu erwerben.

Zusätzliche Meilensteinzahlungen werden ausschließlich bei Veröffentlichung zukünftiger NI 43-101-konformer (wie nachstehend definiert) Mineralressourcenschätzungen für das Victory-Projekt fällig, sofern solche erstellt werden. Dies umfasst 500.000 CAD bei Veröffentlichung einer ersten Mineralressourcenschätzung von mindestens 10 Millionen Tonnen mit einem Gehalt von mindestens 1,0 % Li_2O, sowie 1,0 Mio. CAD bei Veröffentlichung einer gemessenen und angezeigten Mineralressourcenschätzung von über 25 Millionen Tonnen mit einem Gehalt von mindestens 1,0 % Li_2O und 1,5 Mio. CAD bei Veröffentlichung einer gemessenen und angezeigten Mineralressourcenschätzung von über 50 Millionen Tonnen mit einem Gehalt von mindestens 1,0 % Li_2O. Die zuvor genannten Ressourcenschwellen sind ausschließlich vertragliche Zahlungsmeilensteine und stellen keine Schätzungen von Mineralressourcen oder Mineralreserven des Victory-Projekts dar.

Die Transaktion unterliegt üblichen Bedingungen, einschließlich der Genehmigung durch die TSX Venture Exchange. Alle gemäß der Optionsvereinbarung ausgegebenen Stammaktien unterliegen den geltenden wertpapierrechtlichen Weiterverkaufsbeschränkungen und etwaigen von der TSX Venture Exchange geforderten Haltefristen. Die Transaktion ist ein Geschäft zu marktüblichen Bedingungen (Arm’s-Length-Transaktion), und im Zusammenhang mit der Transaktion sind keine Vermittlungsgebühren zu zahlen.

„Wir waren schon immer davon überzeugt, dass das Victory-Projekt vielversprechend für weitere Exploration ist, und die Oberflächengeologie hat diese Einschätzung durchgehend bestätigt“, sagte Jace Angell, Präsident von Last Resort. „Rock Tech ist in Ontario bereits fest verankert und verfolgt eine klare Strategie für den Aufbau eines integrierten Lithiumgeschäfts in der Provinz. Wir freuen uns, dass das Projekt nun in die nächste Phase übergeht.“

„Mit seiner Ontario-Strategie ist Rock Tech ein starker technischer und strategischer Partner für das Victory-Projekt“, sagte Jason Leblanc, Präsident von Bounty Gold. „Das Grundstück befindet sich noch in einem frühen Explorationsstadium, doch die bekannten spodumenführenden Vorkommen, die infrastrukturelle Anbindung und der regionale Kontext bieten eine gute Grundlage für ein systematisches Explorationsprogramm. Wir sehen den Ergebnissen von Rock Techs geplantem Arbeitsprogramm mit Freude entgegen.“

Unterstützung von Rock Techs Ontario-Investitionsstrategie

Das Victory-Projekt spiegelt Rock Techs anhaltendes Engagement für Investitionen in Ontarios Sektor für kritische Mineralien wider. Zusammen mit dem Georgia-Lake-Projekt und dem geplanten Red Rock Konverter stärkt das Victory-Projekt die Ontario-Vermögensbasis des Unternehmens und erweitert sein Portfolio vielversprechender Lithium-Explorationsgrundstücke.

Rock Tech beabsichtigt, das Victory-Projekt durch ein phasenweises Explorationsprogramm voranzutreiben, das die Bestätigung der bekannten, spodumenhaltigen Vorkommen, die Untersuchung ihres Erweiterungspotentials sowie die Bewertung des bislang wenig erkundeten Korridors zwischen den Vorkommen Last Resort und Bounty zum Ziel hat.   

Das Victory-Projekt ist ein Explorationsgrundstück im frühen Stadium. Obwohl spodumenführende Pegmatite an der Oberfläche identifiziert wurden, reicht die bisherige Exploration nicht aus, um eine Mineralressource zu definieren, und es kann nicht zugesichert werden, dass weitere Exploration zur Abgrenzung einer Mineralressource führen wird oder dass sich das Projekt letztlich als wirtschaftlich tragfähig erweisen wird.

Technische Offenlegung

Bestimmte in dieser Pressemitteilung enthaltene technische Informationen stammen aus historischen Explorationsarbeiten früherer Grundstückseigentümer und -betreiber. Obwohl Rock Tech verfügbare historische Aufzeichnungen überprüft hat, hat das Unternehmen nicht alle historischen Explorationsinformationen unabhängig verifiziert, und die Leser sollten sich nicht übermäßig auf historische Explorationsergebnisse verlassen, bis zusätzliche Verifizierungsarbeiten abgeschlossen sind. Die in dieser Pressemitteilung referenzierten historischen Explorationsinformationen sollten nicht als Mineralressourcen- oder Mineralreservenschätzung interpretiert werden. Zusätzliche Explorationsaktivitäten, einschließlich Feldverifizierung, Bestätigungsprobenahme und Bohrungen, werden erforderlich sein, um historische Ergebnisse zu verifizieren und Ausmaß, Kontinuität und Bedeutung der berichteten Mineralisierung zu bewerten.

Die wissenschaftlichen und technischen Informationen in dieser Pressemitteilung wurden von Cameron Andrews, P.Eng., einer „qualifizierten Person“ gemäß National Instrument 43-101 – Standards of Disclosure for Mineral Projects („NI 43-101“), überprüft und genehmigt.

Die in dieser Pressemitteilung offengelegten Probenergebnisse stammen aus selektiven Stichproben und sind nicht notwendigerweise repräsentativ für die Mineralisierung über das gesamte Victory-Projekt. Stichproben sind von Natur aus selektiv und sollten nicht als repräsentativ für den durchschnittlichen Gehalt, die Mächtigkeit oder die Kontinuität der Mineralisierung herangezogen werden. Rock Tech hat verfügbare historische Berichte, Probenahmeprotokolle und Analyseinformationen der Verkäufer überprüft; das Unternehmen hat jedoch keine unabhängige Feldverifizierung, Bestätigungsprobenahme oder Parallelbohrungen historischer Ergebnisse durchgeführt. Das Unternehmen hat nicht alle historischen oder von Verkäufern erstellten Analyseergebnisse unabhängig verifiziert, und die Leser sollten sich daher nicht übermäßig auf solche Informationen verlassen, bis zusätzliche Verifizierungsarbeiten abgeschlossen sind. Die qualifizierte Person hat nicht genügend Arbeiten durchgeführt, um alle derartigen historischen Explorationsinformationen unabhängig zu verifizieren.

Das Victory-Projekt verfügt derzeit nicht über eine Mineralressourcen- oder Mineralreservenschätzung.

Die in dieser Pressemitteilung erörterten potenziellen Verarbeitungswege sind konzeptioneller Natur. Es wurden von Rock Tech keine metallurgischen Tests, Bergbaustudien, vorläufigen wirtschaftlichen Bewertungen, Vormachbarkeitsstudien oder Machbarkeitsstudien zum Victory-Projekt durchgeführt, die eine solche Verarbeitungs- oder Entwicklungsalternative stützen würden, und es kann nicht zugesichert werden, dass eine solche Alternative sich als technisch oder wirtschaftlich tragfähig erweisen wird.

Im Namen des Managements

Mirco Wojnarowicz

CEO, Rock Tech Lithium Inc.

The post Rock Tech Lithium stärkt die „Made in Ontario“-Lithium-Lieferkette durch strategische Akquisition des Victory-Projekts appeared first on Rock Tech Lithium.

• Strengthening presence in global capital markets with combination of listing in Canada and planned trading on NASDAQ
• Rock Tech broadens its institutional investor base and enhances liquidity

Toronto, ON, June 12, 2025 – Rock Tech Lithium Inc. (TSX-V: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) (the „Company“ or „Rock Tech“) is pleased to announce the start of trading of Rock Tech shares on Xetra, the electronic system of Deutsche Börse AG in Germany (WKN: A1XF0V, ISIN: CA77273P02017, Ticker-Symbol: RCK). mwb Wertpapierhandelsbank AG, as designated sponsor, will handle the trading of Rock Tech’s shares with immediate effect and therefore contribute to increased liquidity and a higher turnover.

Rock Tech’s CEO, Mirco Wojnarowicz, commented: “Trading on Xetra is an important step in strengthening our presence in global capital markets and expanding our reach among institutional investors. Together with our Canadian listing and planned NASDAQ listing, this step strengthens our profile on both sides of the Atlantic and supports our strategy of increasing engagement with institutional investors. By joining the most recognized and highly efficient platform for German and European investors to access our shares, we expect to broaden our institutional investor base, enhance liquidity, and support more transparent price discovery for the benefit of all shareholders.”

While Rock Tech’s shares have already been available to German retail investors through venues such as Tradegate and Frankfurt, Rock Tech recognizes Xetra as being Deutsche Börse’s primary electronic trading platform and the reference market used by most German institutional investors. As a result, a Xetra listing broadens Rock Tech’s potential investor base by making Rock Tech accessible to a wider range of institutional investors that are typically restricted to trading on regulated and highly liquid exchanges.

This is not a new primary listing and does not change Rock Tech’s status as a Canadian issuer. Rock Tech will continue to be governed by Canadian securities regulations and reporting requirements.

On behalf of the Management

Mirco Wojnarowicz

CEO, Rock Tech Lithium Inc.

ABOUT ROCK TECH

Rock Tech is powering the battery age by making the battery industries in Europe and North America more independent and competitive. The Company’s goal is to ensure the supply of high-quality, locally produced lithium – supporting a resilient, sustainable, and transparent value chain from mine to battery-grade material.

Rock Tech relies on responsible sourcing, state-of-the-art and proven technologies, and a clear focus on circular economy principles. The Company’s lithium hydroxide converter projects in Guben, Germany (24,000 tonnes LHM per year) and Ontario, Canada (up to 32,000 tonnes LCE per year) form the foundation for a stable and regional supply to the battery and automotive industries. The Guben converter has been recognized as a strategic project under the EU Critical Raw Materials Act.

The raw materials for Rock Tech’s converter projects are sourced exclusively from verifiably ESG-compliant suppliers. In Canada, Rock Tech relies, among other sources, on its wholly owned Georgia Lake Project, which ensures a stable and sustainable supply for the North American market and is being developed in close partnership with local First Nations communities. By integrating recycled materials, the company aims to close the local battery loop.

With its facilities, Rock Tech makes a central contribution to battery-grade material sovereignty and the achievement of climate targets. The company works in partnership with industry, policymakers, and community groups, and is committed to open communication and the highest environmental standards.

For further information:

Kerstin Wedemann, Chief Legal & Corporate Officer

info@rocktechlithium.com; +49 2102 894 1122

Rock Tech Lithium Inc, 2700-40 Temperance Street, Toronto ON M5H 0B4, CAN.

The post Rock Tech Lithium Shares Begin Trading on Xetra in Germany appeared first on Rock Tech Lithium.

Dear Friends and Shareholders,

Rock Tech is entering the second half of 2026 with the clearest strategy in its history. This letter is about that strategy, and the conviction behind it.

When I took over, the company had a single focus project, Guben, and the balance sheet left little room for error as we worked to build a globally competitive lithium conversion business under challenging conditions. My assessment led to one conclusion: to realize our vision, our first converter must be highly economic and it needs a business environment flexible and bold enough to help establish the new supply chain. The engineering and permitting knowledge we built in Germany is genuinely world-class, but the right place to deploy it next is Canada. And Canada was asking for exactly that.

Last June, I was invited into Mark Carney’s trade delegation to Germany. In the year since, the conversations with federal and Ontario officials were crystal clear: Canada has committed to building a domestic critical minerals chain together with its G7 partners from the Critical Minerals Production Alliance and is prepared to back it with real capital. Three shifts define the Carney era, and together they changed our calculus. First, diversification is no longer an aspiration but policy. Through the G7 Critical Minerals Production Alliance, Canada is deliberately routing supply toward trusted partners. Second, the state no longer simply permits a project and steps back. It has signaled it will co-invest directly, for example through the CAD 25 billion Canada Strong Fund. Third, critical minerals are no longer treated as commodities but as strategic security assets, anchored in Canada’s defence industrial strategy and in bilateral partnerships such as the critical minerals declaration Canada and Germany signed in August 2025. Together, these shifts created what no private developer could assemble alone: a project like Red Rock, with a domestic offtake market, the potential for public co-investment, and strategic backing behind it. Additionally, Ontario is offering hydropower at a fraction of the German industrial power price.

We have therefore decided to make Canada our priority. Guben remains a fully permitted, fully engineered asset with real value, and we fully intend to realize it, on disciplined terms and in a smarter financial structure. For the first time, our strategy, our operating environment, and our capital are pulling in the same direction.

Let me take you through it in detail in the sections that follow.

1   The Integrated Play

We own 100% of Georgia Lake, a spodumene deposit in Ontario, just seventy kilometers away from the Red Rock Converter property. Together they will form a fully integrated mine-to-battery-grade-lithium supply chain in a single jurisdiction.

Guben delivers the engineering blueprint. But a standalone merchant converter is permanently exposed to spot feedstock markets. The integrated model we are advancing in Canada eliminates that exposure. We will capture margin at the mine and at the converter.

2   Georgia Lake: Step-Change in Economics

On 19 May 2026, we published ore-sorting test results from work with Queen’s University and STARK Resources, supported by Ontario’s Critical Minerals Innovation Fund. The findings are strong:

• Waste removed before processing: ~25–45%
• Feed-grade uplift: ~1.4–1.8×
• Capital reduction pathway: up to 50% on crushing and concentrator capital
• Operating cost reduction: ~20% indicative

* Illustrative management estimates. Preliminary; not incorporated into any resource estimate, PFS or DFS. Subject to DFS confirmation.

Ore sorting works at lower cutoff grades – meaning more of the deposit becomes mineable. Only ~10% of the property has been drilled. We are planning to launch a summer 2026 drill program targeting meaningful inferred resource addition. DFS award is expected for August 2026. DFS completion target: year-end 2026. Assuming FID in Q1 2027, first production follows approximately 18 months later – making Rock Tech the first lithium producer in Ontario and Georgia Lake the aggregator for neighboring lithium properties.

Lower capital to build, lower cost to run, and a recovering price will push Georgia Lake’s value well above the 2022 PFS after-tax NPV.

3   Red Rock: De-Risked Capital

Red Rock is the Guben blueprint applied to Canada – it is the same IP, now IRA- and USMCA-compliant and 70 kilometers from our own feedstock anchor Georgia Lake. But we learned another lesson in Germany: do not carry the full capital weight of a large-scale project on the holding company’s balance sheet. So, we built a better architecture – the GP/LP model. Rock Tech acts as General Partner and we retain operational control, our technology and management fees, while strategic and financial partners provide the majority of the project capital as Limited Partners.

Partners in place include: Siemens Canada (Digital Twin and automation equipment, signed at the Canadian Critical Minerals Forum; evaluating equity). BMI Group (anchor equity partner with CAD$ 200m, landowner), and government investments are being actively pursued at both the federal and provincial levels.

As important as the financing, we have received budgetary proposals for a fully-scoped turnkey EPC execution. The numbers show potential to substantially reduce our capital estimate relative to prior market assumptions – and they have a significantly better outlook than building under current German market conditions. The DFS will formalize this.

DFS award is expected for June 2026. Completion target: year-end 2026. FID target: Q1 2027.

4   Broadening the Shareholder Base

We are deliberately widening access to our stock on both sides of the Atlantic. The logic is the same in each market: deeper, more transparent trading and a broader investor base mean better liquidity and fairer price formation for every shareholder.

XETRA listing: The process is launched, with an approval expected shortly. This will open Rock Tech to share trading to large German institutional investors.

NASDAQ: Base shelf prospectus is filed, the application underway. We want to be ready when the time is right. We will list when FID for Red Rock is in hand and the business justifies it — targeting to fulfill NASDAQ listing requirements without share consolidation.

5   Guben Monetizing a Permitted, Fully-Engineered Asset

Germany remains important. Our Guben converter is fully permitted and engineered, and it holds Strategic Project status under the EU Critical Raw Materials Act. That value is real and we intend to realize it. But we will be disciplined about how.

The German framework conditions do not currently allow the pace we are achieving in Canada. Guben will be built only once two conditions are met: a solution for a competitive energy price can be implemented, and meaningful state support from German national level.

In the meantime, the project moves forward. We plan to restructure Guben around the same GP/LP model we are using in Canada: Rock Tech builds and operates the plant as General Partner, applying our engineering and our team, while strategic and financial partners provide capital as Limited Partners. These conversations are already underway. We are in active discussions with interested parties about a strategic sale, structured around the same logic. If the asset changes hands, Rock Tech still builds it and still runs it.

Either way, Guben becomes a source of cash and recurring income, on terms that benefit our shareholders.

6   What This Adds Up To

Step back and the picture is clear. We are turning our experience in Germany into cash. We are building, in Canada, the first integrated lithium producer in Ontario with a mine whose economics have just taken a step-change for the better, and our efforts are backed by government, BMI and Siemens. We are funding it through a capital-light GP/LP model that pays us from start of construction without dilution. And we are sequencing it toward a NASDAQ re-rating once our first FID is in hand.

Each of these steps is a value-creation catalyst!

Best regards,

Mirco Wojnarowicz

Chief Executive Officer, Rock Tech Lithium Inc.

June 2026Canada Changes Everything
– One Integrated Strategy –

Dear Friends and Shareholders,

Rock Tech is entering the second half of 2026 with the clearest strategy in its history. This letter is about that strategy, and the conviction behind it.

When I took over, the company had a single focus project, Guben, and the balance sheet left little room for error as we worked to build a globally competitive lithium conversion business under challenging conditions. My assessment led to one conclusion: to realize our vision, our first converter must be highly economic and it needs a business environment flexible and bold enough to help establish the new supply chain. The engineering and permitting knowledge we built in Germany is genuinely world-class, but the right place to deploy it next is Canada. And Canada was asking for exactly that.

Last June, I was invited into Mark Carney’s trade delegation to Germany. In the year since, the conversations with federal and Ontario officials were crystal clear: Canada has committed to building a domestic critical minerals chain together with its G7 partners from the Critical Minerals Production Alliance and is prepared to back it with real capital. Three shifts define the Carney era, and together they changed our calculus. First, diversification is no longer an aspiration but policy. Through the G7 Critical Minerals Production Alliance, Canada is deliberately routing supply toward trusted partners. Second, the state no longer simply permits a project and steps back. It has signaled it will co-invest directly, for example through the CAD 25 billion Canada Strong Fund. Third, critical minerals are no longer treated as commodities but as strategic security assets, anchored in Canada’s defence industrial strategy and in bilateral partnerships such as the critical minerals declaration Canada and Germany signed in August 2025. Together, these shifts created what no private developer could assemble alone: a project like Red Rock, with a domestic offtake market, the potential for public co-investment, and strategic backing behind it. Additionally, Ontario is offering hydropower at a fraction of the German industrial power price.

We have therefore decided to make Canada our priority. Guben remains a fully permitted, fully engineered asset with real value, and we fully intend to realize it, on disciplined terms and in a smarter financial structure. For the first time, our strategy, our operating environment, and our capital are pulling in the same direction.

Let me take you through it in detail in the sections that follow.

1   The Integrated Play

We own 100% of Georgia Lake, a spodumene deposit in Ontario, just seventy kilometers away from the Red Rock Converter property. Together they will form a fully integrated mine-to-battery-grade-lithium supply chain in a single jurisdiction.

Guben delivers the engineering blueprint. But a standalone merchant converter is permanently exposed to spot feedstock markets. The integrated model we are advancing in Canada eliminates that exposure. We will capture margin at the mine and at the converter.

2   Georgia Lake: Step-Change in Economics

On 19 May 2026, we published ore-sorting test results from work with Queen’s University and STARK Resources, supported by Ontario’s Critical Minerals Innovation Fund. The findings are strong:

• Waste removed before processing: ~25–45%
• Feed-grade uplift: ~1.4–1.8×
• Capital reduction pathway: up to 50% on crushing and concentrator capital
• Operating cost reduction: ~20% indicative

* Illustrative management estimates. Preliminary; not incorporated into any resource estimate, PFS or DFS. Subject to DFS confirmation.

Ore sorting works at lower cutoff grades – meaning more of the deposit becomes mineable. Only ~10% of the property has been drilled. We are planning to launch a summer 2026 drill program targeting meaningful inferred resource addition. DFS award is expected for August 2026. DFS completion target: year-end 2026. Assuming FID in Q1 2027, first production follows approximately 18 months later – making Rock Tech the first lithium producer in Ontario and Georgia Lake the aggregator for neighboring lithium properties.

Lower capital to build, lower cost to run, and a recovering price will push Georgia Lake’s value well above the 2022 PFS after-tax NPV.

3   Red Rock: De-Risked Capital

Red Rock is the Guben blueprint applied to Canada – it is the same IP, now IRA- and USMCA-compliant and 70 kilometers from our own feedstock anchor Georgia Lake. But we learned another lesson in Germany: do not carry the full capital weight of a large-scale project on the holding company’s balance sheet. So, we built a better architecture – the GP/LP model. Rock Tech acts as General Partner and we retain operational control, our technology and management fees, while strategic and financial partners provide the majority of the project capital as Limited Partners.

Partners in place include: Siemens Canada (Digital Twin and automation equipment, signed at the Canadian Critical Minerals Forum; evaluating equity). BMI Group (anchor equity partner with CAD$ 200m, landowner), and government investments are being actively pursued at both the federal and provincial levels.

As important as the financing, we have received budgetary proposals for a fully-scoped turnkey EPC execution. The numbers show potential to substantially reduce our capital estimate relative to prior market assumptions – and they have a significantly better outlook than building under current German market conditions. The DFS will formalize this.

DFS award is expected for June 2026. Completion target: year-end 2026. FID target: Q1 2027.

4   Broadening the Shareholder Base

We are deliberately widening access to our stock on both sides of the Atlantic. The logic is the same in each market: deeper, more transparent trading and a broader investor base mean better liquidity and fairer price formation for every shareholder.

XETRA listing: The process is launched, with an approval expected shortly. This will open Rock Tech to share trading to large German institutional investors.

NASDAQ: Base shelf prospectus is filed, the application underway. We want to be ready when the time is right. We will list when FID for Red Rock is in hand and the business justifies it — targeting to fulfill NASDAQ listing requirements without share consolidation.

5   Guben Monetizing a Permitted, Fully-Engineered Asset

Germany remains important. Our Guben converter is fully permitted and engineered, and it holds Strategic Project status under the EU Critical Raw Materials Act. That value is real and we intend to realize it. But we will be disciplined about how.

The German framework conditions do not currently allow the pace we are achieving in Canada. Guben will be built only once two conditions are met: a solution for a competitive energy price can be implemented, and meaningful state support from German national level.

In the meantime, the project moves forward. We plan to restructure Guben around the same GP/LP model we are using in Canada: Rock Tech builds and operates the plant as General Partner, applying our engineering and our team, while strategic and financial partners provide capital as Limited Partners. These conversations are already underway. We are in active discussions with interested parties about a strategic sale, structured around the same logic. If the asset changes hands, Rock Tech still builds it and still runs it.

Either way, Guben becomes a source of cash and recurring income, on terms that benefit our shareholders.

6   What This Adds Up To

Step back and the picture is clear. We are turning our experience in Germany into cash. We are building, in Canada, the first integrated lithium producer in Ontario with a mine whose economics have just taken a step-change for the better, and our efforts are backed by government, BMI and Siemens. We are funding it through a capital-light GP/LP model that pays us from start of construction without dilution. And we are sequencing it toward a NASDAQ re-rating once our first FID is in hand.

Each of these steps is a value-creation catalyst!

Best regards,

Mirco Wojnarowicz

Chief Executive Officer, Rock Tech Lithium Inc.

June 2026

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Key program highlights include:

• Ontario’s Critical Minerals Processing Fund (“CMIF”) helped demonstrate potential to unlock real value at the Georgia Lake Project.
• Collaboration with Queen’s University and STARK Resources demonstrated the effectiveness of government, industry, and research partnership.
• Ore-sorting test work removed approximately 25 to 45 per cent of waste material before downstream processing. ¹
• The upgraded material stream improved ore quality by approximately 1.4x to 1.8x¹.
• Early engineering work identified a potential pathway to materially reduce future crushing and concentrator capital costs by up to 50 per cent¹.
• The Georgia Lake Project further supports Rock Tech’s broader Ontario mine-to-converter strategy alongside the planned Red Rock Converter.

Toronto, Ontario – May 19, 2026 – Rock Tech Lithium Inc. (TSX-V: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) (the „Company“ or „Rock Tech“) is pleased to announce the successful completion of its Ontario Critical Minerals Innovation Fund supported ore-sorting program for the Georgia Lake Lithium Project (“the Project”) in Northern Ontario. The Project is part of Rock Tech’s broader Ontario mine-to-converter strategy and, alongside the planned Red Rock Converter, supports the development of a domestic, made-in-Canada sovereign defence and battery materials supply chain.

Completed in partnership with Queen’s University and STARK Resources, the ore sorting program evaluated UV Laser-based sorting from Optimum N.V. and X-ray Transmission (“XRT”) sensor-based sorting from allmineral Aufbereitungstechnik GmbH & Co. KG for the pre-concentration of mineralized material from the Project (refer to Press Release – Rock Tech Lithium Receives $388,074 in Funding from Ontario’s Critical Minerals Innovation Fund, dated June 23, 2025).

Test work was conducted on two sample sets: selected drill core used to establish and calibrate sorting algorithms, and a blended surface-derived sample used for small-scale testing. Testing was completed under controlled conditions at both ore sorting test facilities using pilot-scale equipment.

The program indicates a pathway to improve process efficiency and reduce future capital and operating costs, which, if successful, could strengthen the long-term competitiveness of the Project and support a more resilient Ontario critical minerals supply chain.

The results provide a foundation to restart key Georgia Lake development activities, including drilling, additional cost-optimizing engineering, and workstreams that support a future Definitive Feasibility Study.

“These results demonstrate how government, industry and research partnerships produce innovation that can directly strengthen the economics and competitiveness of strategically important critical minerals projects,” said Mirco Wojnarowicz, CEO of Rock Tech. “Backed by the Ontario government’s investment through the CMIF, our work positions Georgia Lake to be more resilient and competitive through lithium price cycles and supports Rock Tech’s broader integrated lithium strategy in Northern Ontario, which can help bolster economic security and long-term defence readiness through the development of a made-in-Canada critical minerals supply chain.”

Government-Industry-Research Partnership Unlocks Ontario Critical Minerals Innovation

With support from the Ontario government, through the Critical Minerals Innovation Fund, Rock Tech worked with Queen’s University and STARK Resources, a Germany-based specialist in sensor-based ore sorting and mineral processing technology, to evaluate practical technologies that improve processing efficiency, reduce waste, strengthen the long-term competitiveness of the Project, and support Ontario’s efforts to build a more resilient domestic critical minerals supply chain.

“The Critical Minerals Processing Lab is proud to have collaborated with Rock Tech Lithium and Stark Resources on this important project, which advanced our understanding of lithium mineral processing characteristics and contributed to the advancement of the Georgia Lake project” said Charlotte Gibson, Assistant Professor & Associate Head for Robert M Buchan Department of Mining. “This innovative process development work was made possible through the support of the CMIF, whose investment is helping drive critical minerals processing innovation and strengthen Ontario’s critical minerals value chain.”

Advancing the Next Phase of Development at the Georgia Lake Lithium Project

The results arrive at an important moment for Ontario’s critical minerals sector. While lithium markets have experienced near-term volatility, governments and industry across North America and Europe continue to move aggressively to secure regional battery and critical minerals supply chains.

The Project was the subject of a 2022 Pre-Feasibility Study, which outlined a conventional mine and concentrator development concept based on a 1.0 million tonne per year concentrator. The 2022 PFS contemplated a 9-year mine life, targeted production of approximately 100,000 tonnes per year of 6% spodumene concentrate, and an Indicated Mineral Resource of approximately 10.6 million tonnes at 0.88 per cent Li₂O and an Inferred Mineral Resource of approximately 4.2 million tonnes at 1.00 per cent  Li₂O.

The PFS estimated a pre-tax NPV of USD$223 million, an after-tax NPV of USD$146 million, a pre-tax IRR of 47.8 per cent, and an after-tax IRR of 35.6%, based on an average life-of-mine SC6 price of USD$1,500 per tonne. The PFS also estimated pre-production capital costs of USD$192 million, life-of-project capital costs of USD$291 million, total life-of-project operating costs of USD$536 million, and AISC of USD$1,082 per tonne of concentrate (see Press Release – Rock Tech Lithium completes Pre-Feasibility Study for its Georgia Lake Project dated November 16, 2022).

Against this PFS baseline, the CMIF-supported ore sorting results indicate a potential pathway to further improve project economics in future technical studies. The observed 1.4x to 1.8x upgrade factor means that sorted material can carry materially higher lithium grade into downstream processing than the original feed stream, improving concentrator efficiency and potentially allowing lower-grade material to be considered in future mine planning scenarios.

Similarly, the potential to reduce crushing and concentrator plant capital costs by up to 50 per cent is expected to be driven by a combination of ore sorting and plant specification optimization, providing an opportunity to optimize overall plant design. If confirmed through further engineering and study work, this could materially improve the capital intensity and investment case for the next phase of Georgia Lake development.

As part of this renewed focus, Rock Tech has begun preparations for a potential future drilling program and the next phase of technical studies, including workstreams that could support a Definitive Feasibility Study. These activities would be designed to support resource growth, improve geological confidence, and provide additional data for future mine planning and project development work.

Supporting Rock Tech’s Ontario Mine-to-Converter Strategy

The successful completion of the CMIF-supported ore sorting program strengthens this strategy by indicating a potential pathway to improve the cost structure and development flexibility of the Project. By reducing the amount of waste material processed through the concentrator, ore sorting may support lower operating costs, improve processing efficiency, and provide greater optionality in future mine planning and throughput scenarios.

“Georgia Lake remains foundational to Rock Tech’s Ontario strategy,” said Dirk Harbecke, Chairman of Rock Tech. “These results strengthen the project’s long-term economics and profitability and reinforce the strategic importance of an integrated lithium supply chain in Ontario. As North America and Europe work to secure reliable sources of critical minerals, projects like Georgia Lake and the Red Rock Converter become increasingly important pieces of allied industrial infrastructure.”

Next Steps

Building on the successful outcomes of the program, Rock Tech expects that a future value engineering phase would evaluate the combined impact of ore sorting integration, plant design optimization, and alternative execution strategies across the crushing plant, concentrator plant, and related infrastructure. The results of the CMIF-supported program are conceptual in nature and do not define final economic outcomes, mineral reserve estimates, or plant-scale design changes. Any potential impact on capital costs, operating costs, project economics, mineral reserves, or development plans will require further engineering, feasibility-level studies, and appropriate technical disclosure.

Ontario Innovation Supporting a Stronger Critical Minerals Supply Chain

“Ontario is building a made-in-Canada critical minerals supply chain that creates jobs, strengthens our economic security, and reduces our reliance on foreign adversaries,” said Stephen Lecce, Minister of Energy and Mines. “Through the Critical Minerals Innovation Fund, our government is backing Ontario innovation that lowers costs, unlocks investment, and accelerates responsible mining development in the North. The success of this project shows how Ontario can lead the world in critical minerals, battery materials, and the technologies that will power the future.”

Qualified Persons

The technical content of this press release has been reviewed and approved by Cameron Andrews, P.Eng., General Manager, Canada for Rock Tech Lithium, and Dian Heinrich Page, Pr. Sci. Nat., Principal Consultant – Geology for STARK Resources, an independent Qualified Person, each of whom is a Qualified Person as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects. Mr. Cameron Andrews, P.Eng. has reviewed and approved the portions of this news release relating to the 2022 Pre-Feasibility Study on Georgia Lake Project, Mr. Dian Heinrich Page, Pr. Sci. Nat., has reviewed and approved the portions relating to the CMIF ore sorting project and value engineering.

The ore-sorting test work results described above are preliminary in nature and based on limited-scale testing. These results have not been incorporated into any current mineral resource or reserve estimate or pre-feasibility or feasibility study, and do not represent defined economic outcomes.

Mineral resources disclosed in this news release that are not mineral reserves do not have demonstrated economic viability.

On behalf of the Management

Mirco Wojnarowicz

CEO, Rock Tech Lithium Inc.

ABOUT ROCK TECH LITHIUM

Rock Tech is enabling the battery age by making the battery industries in Europe and North America more independent and competitive. The Company’s goal is to ensure the supply of high-quality, locally produced lithium — supporting a resilient, sustainable, and transparent value chain from mine to battery-grade material.

Rock Tech relies on responsible sourcing, state-of-the-art and proven technologies, and a clear focus on circular economy principles. The Company’s lithium converter projects in Guben, Germany (24,000 tonnes LHM per year) and Ontario, Canada (up to 32,000 tonnes LCE per year) form the foundation for a stable and regional supply to the battery and automotive industries. The Guben converter has been recognized as a Strategic Project under the EU Critical Raw Materials Act.

The raw materials for Rock Tech’s converter projects are sourced exclusively from verifiably ESG-compliant suppliers. In Canada, Rock Tech relies, among other sources, on its wholly-owned Georgia Lake Project, which ensures a stable and sustainable supply for the North American market and is being developed in close partnership with local Indigenous communities. By integrating recycled materials, the company aims to close the local battery loop.

With its facilities, Rock Tech makes a central contribution to battery-grade material sovereignty and the achievement of climate targets. The company works in partnership with industry, policymakers, and community groups, and is committed to open communication and the highest environmental standards.

For further information: Kerstin Wedemann, Chief Legal & Corporate Officer: info@rocktechlithium.com +49 2102 894 1122

Rock Tech Lithium Inc, 2700-40 Temperance Street, Toronto ON M5H 0B4, CAN.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION:

Certain statements contained in this news release constitute „forward-looking information“ under applicable securities laws and are referred to herein as „forward-looking statements“. All statements, other than statements of historical fact, which address events, results, outcomes or developments that the Company expects to occur are forward-looking statements. When used in this news release, words such as „expects“, „anticipates“, „plans“, „predicts“, „believes“, „estimates“, „intends“, „targets“, „projects“, „forecasts“, „may“, „will“, „should“, „would“, „could“ or negative versions thereof and other similar expressions are intended to identify forward-looking statements. In particular, this news release contains forward-looking information relating to, among other things: the potential integration of ore-sorting technology into the Georgia Lake Lithium Project; the anticipated benefits of the ore-sorting program, including potential improvements in process efficiency, reduction of waste material, reductions in future capital and operating costs and the identified pathway to reductions of up to 50 per cent; the potential impact of ore-sorting on project design, plant configuration, throughput, and mine planning; the advancement of the Georgia Lake Lithium Project, including future drilling programs, engineering studies and other workstreams; the potential preparation and timing of a Definitive Feasibility Study; the Company’s ability to improve project economics and capital intensity; and the Company’s broader Ontario mine-to-converter strategy and related development plans.

Forward‑looking information is based on management’s reasonable assumptions, estimates, expectations and opinions as of the date of this news release. Such assumptions include, without limitation: that the results of the ore-sorting test work are representative of the Project’s mineralization and can be replicated at scale; that ore-sorting technology can be successfully integrated into the Project’s process flowsheet and plant design; that the preliminary test work results can be translated into engineering and design optimizations; that anticipated reductions in material throughput to downstream processing circuits will support reductions in plant size, equipment requirements and associated capital costs; that the Company will be able to undertake further engineering, metallurgical test work and drilling activities as planned; that required regulatory, environmental and other approvals will be obtained in a timely manner; that contractors, suppliers and equipment will be available on reasonable terms; and that market conditions, including lithium prices and demand for battery materials, will remain supportive of project development.

Forward-looking information is 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, including but not limited to, the risk that ore-sorting test work results may not be representative of full-scale operations or may not be replicated in future studies; uncertainties relating to the scalability and integration of ore-sorting technology into the Project; the risk that further engineering or technical studies do not confirm the anticipated reductions in capital or operating costs; the risk that the identified pathway to capital cost reductions, including potential reductions of up to 50 per cent, may not be realized; risks associated with changes in project scope, design or assumptions; uncertainties relating to mineral resource estimates and geological continuity; risks relating to further drilling and exploration activities; permitting, regulatory and environmental risks; risks related to availability of financing, cost inflation, supply chain constraints and contractor performance; fluctuations in lithium prices and market demand; and general economic, market and business conditions. 

Additional risk factors are discussed in the Company’s public disclosure documents available under its profile on SEDAR+. Except as may be required by law, Rock Tech undertakes no obligation and expressly disclaims any responsibility to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.

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Toronto, ON, June 11, 2025 – Rock Tech Lithium Inc. (TSXV: RCK) (OTCQX: RCKTF) (FSE: RJIB) (the “Company” or “Rock Tech”) is pleased to announce that it has been selected for funding under the prestigious KAVA (Knowledge and Innovation Activities) grant program by EIT RawMaterials, the most active network in the raw materials sector in Europe. This recognition supports Rock Tech’s ongoing commitment to advancing innovative lithium refining solutions in Europe and is the first funding awarded after Rock Tech’s Lithium Hydroxide Convertor Guben (LHCG) project has been recognized as a strategic project under Critical Raw Materials Project by the European Commission. Rock Tech will receive EUR 800,000 to improve and innovate its lithium conversion process to be applied to its Guben Converter in the future.

Under the KAVA Call-funding program, Rock Tech’s Lithium subsidiary company Rock Tech Guben GmbH will collaborate with leading research and industry partners, including NTUA (Greece), VITO (Belgium), and Admiris (Greece), to optimize lithium extraction processes and enhance lithium hydroxide monohydrate (LHM) production from spodumene. Rock Tech believes this optimization work will create substantial future operational and cost benefits for the Guben Converter.

“We are honored to be selected for the KAVA Call funding and to work jointly with partners to commercialize innovative, potentially game-changing lithium processing technologies”, comments Mirco Wojnarowicz, Rock Tech’s CEO.

The selected project, named OLiVer (Hard rock Lithium Extraction and Purified Value Products for Energy Applications) will demonstrate innovative processes at pilot scale, significantly improving lithium recovery efficiency and reducing environmental impact in line with EU green transition goals. The OLiVer project will focus on four main objectives:

1. Optimizing pyro-hydro-metallurgical processing to enhance lithium extraction efficiency from spodumene.
2. Developing a novel secondary lithium sulfate recovery process, enabling improved lithium recovery rates.
3. Integrating primary and secondary lithium sulfate streams to boost overall LHM production yield.
4. Conducting pilot-scale demonstrations to establish commercial viability for the enhanced lithium extraction process.

With this project, Rock Tech aims to drive forward the EU’s critical raw materials strategy and sustainability goals by producing high-purity LHM for electric vehicle batteries regionally.

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• In addition to the proposed senior debt tranche from the European Investment Bank (EIB), Export Credit Agency (ECA) support represents a vital component of the debt financing structure for large-scale infrastructure projects like the Guben Converter.

• Amidst market turmoil and Lithium price uncertainty Rock Tech’s Guben Converter – a strategic project under the EU’s Critical Raw Materials Act – remains the largest committed stand-alone Lithium refinery project in Europe.

Toronto, ON, 21 May 2025 – Rock Tech Lithium Inc. (TSX-V: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) (the „Company“ or „Rock Tech“)is pleased to announce it has received up to EUR 150m in government-backed support from export credit agencies via conditional, non-binding expressions of interest. Specifically, UK Export Finance (UKEF) and the Finnish export credit agency (Finnvera) have expressed their interest to support the Guben Converter. In addition, discussions with further export credit agencies from Europe, Australia and China are ongoing to support the procurement of key equipment items from these countries. ECA support will be additional to the proposed European Investment Banks’s (EIB) senior debt tranche of EUR 150 million (as announced by the Company in a previous press release).

“We welcome the strong backing from Export Credit Agencies in supporting the Guben Converter project. Their engagement reflects confidence in our vision, the business case and the strategic importance of this facility for Europe’s green energy transition.” says Chris Wright, Rock Tech’s CFO.

In detail, the debt financing will benefit from the project’s European sourcing scheme, making the project eligible for credit guarantees from major European export credit agencies. Large packages for supplies and services are to be contracted with business & procurement partners based in United Kingdom and Finland, and other EU countries. Subject to the due diligence being completed concurrently in accordance with their policies and applicable OECD consensus guidelines by the lending consortium and the ECAs, UKEF and Finnvera have expressed their initial interest in supporting the project via guarantees towards the lenders.

About the Guben Converter

The Guben Lithium Converter is a pioneering facility in Guben, Brandenburg, Germany, by the German-Canadian company Rock Tech Lithium Inc. This plant is set to become Europe’s first commercial lithium hydroxide refinery, aiming to produce 24,000 tonnes of battery-grade lithium hydroxide annually—enough to supply over 500,000 electric vehicles per year.

Strategically located near major automotive and battery manufacturing hubs the Guben Converter is designed to strengthen Europe’s battery supply chain by processing spodumene concentrate secured via leading trading partner C&D Logistics (Qingdao) Co., Ltd. The Converter will utilize advanced crystallization technologies, supplied by GEA Group AG, to ensure high-purity lithium production with minimal environmental impact. The leading international engineering firm Worley Ltd. has been selected as construction partner (EPCM) for the plant.

Recognized as a strategic project under the EU’s Critical Raw Materials Act, the Guben Converter underscores Europe’s commitment to securing essential materials for the energy transition. The project is expected to create approximately 200 jobs and represents a significant step toward regionalizing and decarbonizing the lithium supply chain in Europe.

On behalf of the Management

Mirco Wojnarowicz

CEO, Rock Tech Lithium Inc.

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The Units were offered to and subscribed by existing shareholders and new investors, notably funds from Europe. Rock Tech intends to use the proceeds of the Offering to finance the continued development of the Company’s integrated conversion strategy, and for general corporate purposes (including expenses incurred by the Company in connection with the Offering. The Company paid finder fees of EUR 23,967 to an arm’s-length party in connection with the closing of this Offering. 

Derek Sobel, CFO Rock Tech, comments: „On behalf of the entire team, I want to thank our shareholders for their continued trust and support. Their commitment to our strategy and long-term vision drives us to deliver growth and value. We remain focused on advancing our projects and adhering to disciplined financial management.” 

Each Unit consists of one common share in the capital of Rock Tech (the “Common Shares”, with such Common Shares comprising the Units, the “Unit Shares”) and one Common Share purchase warrant (each whole Common Share purchase warrant, a “Warrant”, and together with the Units and the Unit Shares, the “Securities”). Each Warrant entitles the holder thereof to purchase one Common Share (a “Warrant Share”) at an exercise price of $1.30 per Warrant Share for a period of 36 months following the date of issuance of such Warrant, subject to and in accordance with the terms and conditions of the certificate evidencing such Warrant, including adjustment in certain circumstances. The Securities offered pursuant to the Offering 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 of any state of the United States and accordingly may not be offered or sold within the United States except in compliance with the registration requirements of the U.S. Securities Act and applicable state securities laws or pursuant to exemptions therefrom. The Unit Shares and Warrant Shares have been conditionally accepted for listing on the TSX-V, which is subject to the final acceptance of the TSX-V. 

The company also announces that is has granted 2,380,000 stock options to certain directors, officers and employees of the Company. All Options were granted in accordance with the Company’s Stock Option Plan. 800,000 of the options were issued to Directors and Officers of the Company. The Options were granted at an exercise price of $1.00. The Options will vest immediately and are exercisable for a five-year term, expiring March 24, 2030.  

All dollar amounts in this news release are expressed in Canadian dollars.  

On behalf of the Board of Directors,  

Dirk Harbecke 

Chairman & CEO 

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• The parties will establish a European joint-venture that controls Rock Tech’s Guben Converter in Germany, as well as Arcore’s Lopare project in Bosnia-Herzegovina.

• The business combination will cover the entire value chain from mine to battery-grade Lithium products.

• This fully integrated supply chain will ensure a reliable battery materials supply for Europe, create operational synergies, lower costs and substantially enhance international competitiveness.

• The binding Business Combination Agreement has been signed on February 19, 2025. Rock Tech will hold 75% control of the newly created company. Closing is targeted for Q2/2025.

Toronto, February 20, 2025 /CNW/ – Rock Tech Lithium Inc. (TSXV: RCK) (OTCQX: RCKTF) (FSE: RJIB) (“Rock Tech” or “the Company”) is pleased to announce the signing of a binding Business Combination Agreement (BCA) to form a business combination with Arcore AG (“Arcore”), an arm’s length Swiss-based mining company. The goal is to establish a fully integrated Lithium supply chain in Europe, reducing dependence on other regions for critical battery raw materials. Lithium is an essential mineral for the energy transition, and demand in Europe is expected to triple by 2030, driven by the increasing need for batteries in electric vehicles (EVs) and energy storage systems as estimated by McKinsey & Company’s Battery Insight Demand Model.

Dirk Harbecke, Rock Tech CEO & Chairman, comments: “Strong European supply chains are essential to secure the regions’ strategic autonomy, promote industrial competitiveness and enable the transformation to a climate-neutral economy. Europe is currently heavily dependent on imports of critical raw materials such as lithium. This is an important step for Rock Tech to become the European leader in battery raw materials supply.”

Jeff Stone, Interim CEO Arcore, states: “Caring for this exceptionally vital asset of the Republic of Srpska is a fiduciary duty that we assume with the utmost responsibility.  It is with that responsibility in mind that we formally submit our concession application.  It is a privilege for Arcore alongside Rock Tech to play a defining role in the creation of an independent European supply chain of critical metals.”

Vladimir Rudic, Managing Director of Arcore Doo in Bosnia-Herzegovina, adds: “The Lopare project, thanks to our collaboration and association with Rock Tech, and their cutting-edge technological innovations, will be the standard bearer of new trends in the development of sustainable mining in this traditional mining region.”

Formation of NewCo

Rock Tech and Arcore will establish a new European entity (NewCo). Upon Closing, it is intended that (i) Rock Tech will contribute the shares of its wholly owned subsidiary Rock Tech Guben GmbH to NewCo and will hold shares in NewCo representing 75% of NewCo’s registered share capital, and that (ii) ARCORE will contribute the shares of its wholly owned subsidiary AR CORE d.o.o to NewCo and hold shares representing 25% of NewCo’s registered share capital.

The core assets of NewCo will include Rock Tech’s fully permitted Lithium converter in Guben, Germany, and Arcore’s lithium-boron-magnesium mining project in Lopare, Bosnia-Herzegovina. It is envisioned that the Lopare project will deliver Lithium Sulphate feedstock (produced at site) to the Guben Converter from 2030 onwards; in addition to the already secured spodumene supply from contracted partners. Utilizing Lithium Sulphate as future feedstock is a key step in establishing a circular Lithium economy and reducing production costs significantly. This approach aligns with Rock Tech’s recycling flowsheet, for which Lithium Sulphate from black mass recycling is used and subsequently refined into battery-grade Lithium hydroxide at Rock Tech’s converters. By processing Lithium raw material to Lithium Sulphate at-site in Lopare an important value-adding step will remain in-country.

As leading partner of the NewCo, Rock Tech will engage closely with the local communities as part of the permitting process, leveraging its expertise gained from developing its Georgia Lake lithium project in Canada. The Arcore deposit will be developed in cooperation with local stakeholders and in compliance with the strictest environmental, social, and governance (ESG) standards. The company plans to obtain certification under the Initiative for Responsible Mining Assurance (IRMA) standard.

The Projects

Guben Lithium Converter

The centerpiece of Rock Tech’s European activities is its planned Lithium-Hydroxide Monohydrate (“LHM”) Converter in the Brandenburg battery cluster, designed to produce battery-grade LHM for up to 500,000 electric vehicles per year. The project is currently in its final financing phase, with all relevant construction, environmental and operation permits and engineering studies completed. The state of Brandenburg supports the project due to its high strategic relevance. Engineering and project management firm Worley Ltd. has been selected as the EPCM provider for the Guben Converter, and LHM offtake agreements as well feedstock supply have been secured.

Lopare Lithium Project

Arcore’s mineral deposit in the Lopare region of Bosnia-Herzegovina has the potential to become one of the largest lithium mines in Europe with estimated 600.000 tonnes of Lithium Carbonate Equivalent (LCE). According to the CSA Global Mineral Resource Estimate (MRE), the deposit contains an indicated resource of 426Mt grading 561ppm Li₂O and 0.95% B₂O₃ and an inferred resource of 864Mt grading 579ppm Li₂O and 0.67% B₂O₃, respectively. Beyond lithium and boron, the deposit contains significant concentrations of other valuable minerals. Internal estimates indicate that within the resource area, the material contains an average of 9.41% MgO, 2.3% K₂O, and 10.82% Al₂O₃. While these elements are not included in the reported Mineral Resource Estimate, they highlight the broader economic potential of the deposit.  

CSA Global Mining Industry Consultants, an ERM Group Company, completed a Mineral Resource Estimate titled “Lopare-Boron-Lithium-Project” as finalized on November 30 2022 with report number R268.2022. The Mineral Resource Estimate is summarized below in Table 1. Note, Arcore AG being a privately-owned Switzerland-based lithium mining company opted to adhere to Australian JORC Code 2012 guidelines, meaning that such mineral resource estimate may not align fully with the reporting requirements of Canada’s National Instrument 43-101.

The Lopare deposit remains highly prospective, with significant potential to expand the existing resource through additional exploration and technical studies. While elements such as MgO, K₂O, and Al₂O₃ are not currently included in the Mineral Resource Estimate, ongoing geometallurgical and mineralogical studies will further assess their economic significance. Moreover, exploration beyond the defined Mineral Resource suggests geological continuity, with a significant exploration target. This exploration target highlights the opportunity for further resource growth and optimization through future drilling programs and study work.

Following the successful completion of the exploration phase, the project has now applied for a Mining Concession. The first important step in the new joint venture will be the finalization of the pre-feasibility study to further assess the technical scope and quantify the economic benefits of the project. In addition to developing possible mining and processing methods, this study will comprehensively examine the environmental and social compatibility of the project. The study will be carried out by an internationally experienced engineering consultancy company.

With this joint venture, Rock Tech and Arcore are taking a significant step toward securing a sustainable, efficient, and competitive lithium supply chain in Europe, reinforcing the continent’s battery industry and energy transition goals.

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SCIENTIFIC AND TECHNICAL DISCLOSURE The scientific and technical disclosure included in this news release has been reviewed and approved by Cameron Andrews, P.Eng, General Manager Georgia Lake Project, a Qualified Person under National Instrument 43-101 Standards of Disclosure of Mineral Projects. 

CLOSING CONDITIONS The completion of this transaction remains subject to the fulfillment of all customary closing conditions, including but not limited to regulatory approvals, and compliance with applicable legal and tax requirements.

Neither the 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. 

There are no finders’ fees associated with this transaction.

ABOUT ROCK TECH

Rock Tech’s vision is to supply the electric vehicle and battery industry with sustainable, locally produced Lithium, targeting a 100% recycling rate. To ensure resilient supply chains, the company plans to build Lithium converters at the doorstep of its customers, beginning with the Company’s proposed Lithium-Hydroxide Converter in Guben, Brandenburg, Germany. Rock Tech Lithium plans to source spodumene from its own Georgia Lake project in the Thunder Bay Mining District of Ontario, Canada, and procure from other ESG-compliant mines, including sourcing intermediary Lithium products. Ultimately, Rock Tech’s goal is to create a closed-loop Lithium production system. Rock Tech has gathered one of the strongest teams in the industry to close the most pressing gap in the clean mobility story. The Company has adopted strict environmental, social and governance standards and is developing a proprietary refining process to increase efficiency and sustainability further. Rock Tech Lithium Inc, 2400-333 Bay Street, Toronto ON M5H 2T6, CAN. Konstantin Burger, VP Investor Relations: press@rocktechlithium.com (+1) 416-848-7744

ABOUT ARCORE AG

Arcore is a privately-owned Switzerland-based lithium mining company with extensive lithium resources and a commitment to environmental and safety standards while seeking to accelerate Europe’s energy transition reliably. https://arcore.ch/ Arcore AG, Steinhauserstr. 74, 6300 Zug, Switzerland. Jeff Stone, Interim CEO email: press@arcore-lithium.com

CAUTIONARY NOTE CONCERNING FORWARD-LOOKING INFORMATION Certain statements contained in this news release constitute „forward-looking information“ under applicable securities laws and are referred to herein as „forward-looking statements“. All statements, other than statements of historical fact, which address events, results, outcomes or developments that the Company expects to occur are forward-looking statements. When used in this news release, words such as „expects“, „anticipates“, „plans“, „predicts“, „believes“, „estimates“, „intends“, „targets“, „projects“, „forecasts“, „may“, „will“, „should“, „would“, „could“ or negative versions thereof and other similar expressions are intended to identify forward-looking statements. In particular, this press release contains forward-looking information pertaining to expectations or predictions concerning the establishment of the joint venture company, the regulatory approvals, fulfilment of closing conditions, and/or about the mineral resource or reserve or outcome and proof of the expected potential of the Lopare Lithium project, the Company’s and/or Arcore’s intentions with respect to the development and timing thereof and statements regarding further exploration activities future plans, activities and schedules relating to such projects and related development including the design and features of the Guben Converter and/or the Lopare Lithium project, as well as the potential of the Lopare Lithium project and the expected costs, capital expenditures, timing and outcomes thereof; statements regarding the Company’s future plans, estimates, and schedules relating to the joint venture company, the Guben Converter and/or the Lopare Lithium project, including the anticipated timing of future activities taken in support of the development thereof;  Rock Tech’s potential financing arrangements; the expected economic performance of the Guben Converter and/or the Lopare Lithium project and anticipated production of battery-grade Lithium Hydroxide and related processing methods employed and the exploration of the Lopare deposit; the estimated capital and operating costs of the Guben Converter and/or the Lopare Lithium project; the anticipated timing and outcomes of a final investment decision and regulatory approvals,construction activities and commissioning of the Guben Converter; the anticipated timing and outcome of the pre-feasibility study of the Lopare Lithium project; statements regarding the Company’s sustainability and ESG related goals and strategy, including the benefits and achievement thereof and future actions taken by the Company in relation thereto; expected regulatory processes and final outcomes, permits and mining concessions; expectations regarding the electric vehicle industry, including the demand for and pricing of battery-grade Lithium Hydroxide and the benefits therefrom, expectations regarding the exploration targets and future drilling programs and the development of political and regulatory frameworks especially in Germany, Bosnia-Herzegovina and the European Union; Rock Tech’s opinions, beliefs and expectations regarding the Company’s business strategy, development and exploration opportunities and projects; and plans and objectives of management for the Company’s operations and properties. Forward-looking statements by their nature are based on assumptions and involve known and unknown risks, uncertainties and other factors which may cause the actual results to differ materially from the forward-looking statements, including the risks, uncertainties and other factors discussed in the Company’s most recent management’s discussion and analysis and annual information form filed with the applicable securities regulators. No assurances can be given that any of the events anticipated by the forward-looking statements will transpire or occur, and the Company cautions the reader not to place undue reliance upon any such forward-looking statements. The Company does not intend, nor does it assume any obligation to update or revise any of the forward-looking statements, whether as a result of new information, changes in assumptions, future events or otherwise, except to the extent required by applicable law.

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“This partnership is a testament to our commitment to sustainability and formation of a circular economy.” said Kerstin Wedemann, Chief Operations and Legal Office at Rock Tech. “By transforming waste into value, we enhance our profitability and support the cement industry’s decarbonization efforts.”  

“Ensuring the future supply of sufficient quantities of high-quality cement grinding materials is of great strategic importance for Schwenk. The LSC (Leached Spodumene Concentrate) produced during the operation of the planned Converter in Guben represents an interesting and regionally available source of secondary raw materials.” says Johan Trenkwalder, Member of the Management Board SCHWENK Germany 

Environmental and Economic Benefits 

The primary objective of the partnership is to develop industrial applications for residues generated from Rock Tech’s Lithium-Hydroxide production, specifically leach residues. During initial studies conducted by the Institute of Technologies and Economics of Lithium (ITEL), the leach residues demonstrated potential as Supplementary Cementitious Materials (SCM) for use in cement manufacturing, offering the following benefits: 

• New Revenue Stream and Improved Economics: Rock Tech will sell its by-products to Schwenk, thereby creating an additional income stream. The parties have agreed on key commercial terms, including offtake pricing for the product. 

• Lower Carbon Emissions: Using the leach residues as SCMs in cement production significantly reduces CO₂ emissions for Schwenk and reduces dependency on other SCMs from coal-based-energy production, which will be less widely available in the future. 

• Cost Savings: Avoiding leach residue transportation and disposal lowers Rock Tech’s annual operational expenditures by c. 7% and reduces the Guben Converter environmental impact. 

Upon the successful ramp-up of Rock Techs’ Guben Converter, Schwenk plans to invest into state-of-the-art facilities for drying, grinding, and storing leach residues from Lithium production. By 2029, Schwenk aims to use up to 200,000 tonnes of by-products annually, helping Rock Tech achieve its zero-waste goals.  

A Sustainable Partnership 

The agreement outlines that Schwenk eventually intends to offtake leach residues from Rock Tech’s Guben Converter. During the initial ramp-up phase, flexibility is prioritized, including the option of temporarily utilizing residues in the high-temperature cement processes, if required. To facilitate the widespread adoption of this innovation, both parties will jointly pursue critical certifications, including REACH compliance and approvals from the German Institute for Construction Technology (DIBt). The certification process is expected to take up to 1.5 years. As part of the agreement, both parties agree to exclusive cooperation for the duration of the agreement.  

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