Ms. Kerstin Wedemann reports

ROCK TECH LITHIUM CLOSES $306,000 SECOND TRANCHE NON-BROKERED PRIVATE PLACEMENT FOR AGGREGATE GROSS PROCEEDS OF $5.5 MILLION

Further to the news releases dated Aug. 29 and Sept. 4, 2025, Rock Tech Lithium Inc. has closed its previously announced second tranche non-brokered private placement offering pursuant to which the company sold 340,000 units at a price of 90 cents per unit for aggregate gross proceeds of $306,000. In aggregate, the company has issued an aggregate of 6,093,221 units for total gross proceeds of $5,483,898.90 under both the first and second tranches of the offering.

Each unit consists of one common share of the company and one common share purchase warrant of the company, exercisable at price of $1.17 to purchase one additional common share of the company for a period of three years from the date of issuance thereof.

The company intends to use the net proceeds raised from the first and second tranches of the offering to finance the advancement of the Guben converter and for general corporate and working capital purposes.

The second tranche of the offering was completed pursuant to Section 2.3 of Ontario Securities Commission Rule 72-503 (Distributions Outside of Canada). Accordingly, the securities issued in connection with the second tranche of the offering are not subject to a hold period in accordance with applicable Canadian securities laws. Closing of the offering remains subject to receipt of final approval of the TSX Venture Exchange. The company did not pay any commissions in connection with the second tranche of the offering.

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 lithium hydroxide monohydrate per year), and Ontario, Canada (up to 36,000 tonnes 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 European Union Critical Raw Materials Act.

The raw materials for Rock Tech's converter projects are sourced exclusively from verifiably environmental, 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, policy-makers and community groups, and is committed to open communication and the highest environmental standards.

We seek Safe Harbor.