TAICHUNG CITY, Taiwan, July 29, 2025 — J-Star Holding Co., Ltd. (“J-Star” or the “Company”), a prominent provider of cutting-edge carbon fiber and composite solutions for diverse applications like personal sports gear, healthcare products, auto components, resin systems, and R&D services, today announced the pricing of its public offering involving 1,250,000 ordinary shares (the “Offering”). The shares are priced at $4.00 each (the “Offering Price”).

Furthermore, the Company has granted Maxim (as defined below) a 45-day option to buy up to 187,500 additional ordinary shares at the initial public offering price (the “Over-allotment”).

Assuming the Over-allotment is not exercised, J-Star expects to receive gross proceeds of approximately $5.0 million from the Offering, before accounting for underwriting discounts, commissions, and estimated offering expenses payable by J-Star.

The shares are expected to commence trading on the Nasdaq Capital Market under the ticker symbol “YMAT” on July 30, 2025. The Offering is anticipated to close on July 31, 2025, contingent upon standard closing conditions.

Maxim Group LLC (“Maxim”) is the sole Book-Running manager for the Offering. Loeb & Loeb LLP is serving as counsel to the Company, and Ellenoff Grossman & Schole LLP is serving as counsel to Maxim for the Offering.

The Offering is being conducted under the Company’s Registration Statement on Form F-1 (File No. 333-286805), as amended, which the U.S. Securities and Exchange Commission (“SEC”) declared effective on July 29, 2025. Before investing, it is important to read the prospectus and other documents the Company has filed or will file with the SEC for detailed information about the Company and the Offering. These documents can be accessed for free on the SEC’s EDGAR website at . Electronic copies of the prospectus related to the Offering can also be obtained from Maxim Group LLC, 300 Park Avenue, 16th Floor, New York, NY 10022, by calling +1 (212) 895-3500, or by emailing . A copy of the final prospectus, when available, can also be found on the SEC’s website at .

This press release is for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities. No sale of these securities will occur in any state or jurisdiction where such offer, solicitation, or sale would be unlawful before registration or qualification under the securities laws of that state or jurisdiction.

About J-Star Holding Co., Ltd.

J-Star (NASDAQ: YMAT) is a holding company operating through subsidiaries in Taiwan, Hong Kong, and Samoa, with its headquarters in Taiwan. The J-Star predecessor group, established in 1970, possesses over 50 years of expertise in the material composites industry. J-Star develops and commercializes technology related to carbon reinforcement and resin systems. Leveraging decades of experience in composites and materials, J-Star applies its knowledge to design and manufacture a wide array of lightweight, high-performance carbon composite products, ranging from structural parts for electric and sports bicycles, rackets, and automobile parts to healthcare products.

FORWARD-LOOKING STATEMENTS

Certain statements in this press release concerning future expectations, plans, and prospects, as well as any statements regarding matters that are not historical facts, may be considered “forward-looking statements” under the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements about the expected commencement of trading and closing dates. Terms like “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would,” and similar expressions are used to identify forward-looking statements, although not all forward-looking statements contain these words. Actual results may differ significantly from those indicated by these statements due to various important factors, including uncertainties related to market conditions and the completion of the Offering on the anticipated terms or at all, as well as other factors discussed in the “Risk Factors” section of the preliminary prospectus filed with the SEC. Investors are cautioned not to place undue reliance on any forward-looking statements in this press release. Any forward-looking statements in this press release are relevant only as of the date of this release, and J-Star specifically disclaims any obligation to update any forward-looking statement, whether due to new information, future events, or other reasons, except as required by law.

Contact:
Matt Chesler, CFA
FNK IR
646-809-2183

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