TAICHUNG CITY, Taiwan, Dec. 16, 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 it has received a letter of noncompliance from The Nasdaq Stock Market LLC ("Nasdaq"), dated December 12, 2025, notifying the Company ...