YEST secured a ₩17.578bn order from Samsung Electronics for semiconductor manufacturing furnaces and chillers. The value equals 20.19% of FY2025 consolidated revenue. YEST received the purchase order on August 24, 2026. The contract runs through June 30, 2027. Samsung pays 90% after delivery and 10% after setup. There is no advance payment. The filing does not state a profit margin.