Rock Tech Lithium Inc. (TSX-V: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) is pleased to announce, further to its news release dated August 29, 2025, the first tranche closing of its previously announced brokered and non-brokered private placement offering pursuant to which the Company sold 5,753,221 units at a price of $0.90 per Unit for aggregate gross proceeds of $5,177,898.90.

Maxim Group LLC acted as sole placement agent in connection with the Brokered 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.

In connection with the second tranche closing of the Non-Brokered Offering, the Company is pleased to announce that it has received irrevocable subscription agreements for aggregate gross proceeds of $306,000. The second tranche of the Non-Brokered Offering is expected to close on or about September 5, 2025, or such other date or dates as the Company may determine.

The Company intends to use the net proceeds raised from the Offering to fund the advancement of the Guben Converter and for general corporate and working capital purposes.

The Offering was completed pursuant to Section 2.3 of Ontario Securities Commission Rule 72-503 – Distributions Outside of Canada and pursuant to the listed issuer financing exemption under Part 5A of National Instrument 45-106 – Prospectus Exemptions accordingly, the securities issued in connection with the Offering are not subject to a hold period in accordance with applicable Canadian securities laws. The Company has filed on its SEDAR+ profile on August 29, 2025 an offering document pursuant to Form 45-106F19 in accordance with the Listed Issuer Financing Exemption. The LIFE Offering Document can be accessed under the Company’s profile at www.sedarplus.ca and on the Company’s website at https://rocktechlithium.com/.

Closing of the Offering and the second tranche of the Non-Brokered Offering remains subject to receipt of final approval of the TSX Venture Exchange. In connection with the Brokered Offering, the Company paid a cash commission of $97,600 to Maxim and in connection with the Non-Brokered Offering the Company paid a cash commission of $4,500 to certain finders.

This news release does not constitute an offer to sell or a solicitation of an offer to buy nor shall there be any sale of any of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful, including any of the securities in the United States of America. The securities 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 within the United States or to, or for account or benefit of, U.S. Persons (as defined in Regulation S under the U.S. Securities Act) unless registered under the U.S. Securities Act and applicable state securities laws, or an exemption from such registration requirements is available.

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 hydroxide converter projects in Guben, Germany (24,000 tonnes LHM per year) and Ontario, Canada (up to 36,000 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.