TAICHUNG CITY, Taiwan, Dec. 18, 2025 (GLOBE NEWSWIRE) -- J-Star Holding Co., Ltd. (Nasdaq: YMAT) (“J-Star” or the “Company”), a leading provider of innovative carbon fiber and composite solutions across a wide range of applications including personal sports equipment, healthcare products, automobile parts, resin systems, and research and development services, today announced its unaudited financial results for the six months ended June 30, 2025 (“First Half 2025”). Financial and Business Highlights Revenue ...