Mr. Mirco Wojnarowicz reports

ROCK TECH LITHIUM PROJECTS 23% REDUCTION IN OPERATING COSTS FOR GUBEN CONVERTER

Rock Tech Lithium Inc. has reached a significant milestone in the development of its Guben lithium converter. Following a comprehensive update to its operational expenditure (opex) model, the company anticipates a reduction of approximately 23 per cent in the modelled cost of producing lithium hydroxide -- from approximately 5,033 euros per ton to 3,878 euros per ton (based on an annual output target of 24,000 tons of lithium hydroxide). This equates to an annual project opex reduction of approximately 27.7 million euros, from 120.8 million euros to 93.1 million euros.

• Rock Tech's updated opex model projects a 23-per-cent reduction in operating costs for its Guben converter, cutting lithium hydroxide production expenses from approximately 5,033 euros to 3,878 euros per ton.
• Based on the updated model, the company is enhancing its competitiveness in volatile markets.

The modeled reduction reflects a combination of updated cost inputs across several key areas.

• Transport and logistics: Transport and logistics expenses are projected to decline by 11.7 million euros (47 per cent), from 25 million euros to 13.3 million euros following the adoption of a revised logistics concept, which accounts for 42.2 per cent of the total projected decrease in opex. The most significant component of this decrease stems from an updated spodumene supply contract with more favorable Incoterms, reducing shipping obligations and expected logistics costs by 10.4 million euros.
• Reagent procurement: Revised supplier offers reduce reagent procurement costs by 2.8 million euros, from 25.9 million euros to 23.1 million euros, contributing approximately 10.1 per cent of the total projected savings.
• Fixed costs: Refined estimates of annual fees, office expenses, insurance coverage and IT (information technology) costs are projected to decrease by 4.2 million euros, from 10 million euros to 5.8 million euros, accounting for approximately 15.2 per cent of total opex savings.
• Leach residue reuse: The company expects a positive cost impact of up to 6.3 million euros by reusing leach residues instead of disposing of them, under a memorandum of understanding with Schwenk Zement GmbH & Co. KG, a well-known German company in the cement industry. This initiative contributes approximately 22.7 per cent of the total opex reduction. The companies intend to finalize binding offtake agreements for the leach residues in due course.
• Additional savings: In addition, the company expects to further reduce its costs through maintenance savings and refined labour estimates, resulting in an additional 2.7 million euros in project opex reduction.

Increased energy costs are expected to be mitigated by a sustainable long-term energy supply agreement currently under negotiation with Enertrag SE. This cost improvement positions Rock Tech as an internationally competitive player in the lithium-refining market.

"This significant cost reduction is a major step forward," says Mirco Wojnarowicz, chief executive officer of Rock Tech. "In today's volatile market, establishing a lean and competitive project is not just beneficial -- it's essential. For our equity and debt financing partners, opex is one of the most critical benchmarks for project viability. By reducing our modeled costs by 23 per cent, we are not only improving competitiveness but also significantly strengthening the financing case for Guben."

The company is also conducting a parallel review of capital expenditures (capex). An updated financial model and full profitability analysis will be published once the review is complete in the coming weeks.

Rock Tech remains committed to building one of Europe's first lithium hydroxide converters, supporting the transition to sustainable mobility with reliable, local supply of critical battery materials.

About the Guben converter

The Guben lithium converter is a pioneering facility in Guben, Brandenburg, Germany, by the German-Canadian company Rock Tech Lithium. 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 (equivalent to approximately 30 GWh (gigawatt-hours) of battery capacity) -- enough, based on an average consumption of 0.8 kilogram per kilowatt-hour and 60 kWh per EV, to supply batteries for approximately 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.

About Rock Tech Lithium Inc.

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 hydroxide converter projects in Guben, Germany (24,000 tonnes LHM per year), and Ontario, Canada (up to 36,000 tonnes LCE (lithium carbonate equivalent) 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 environment-, social- and governance-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.

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