TAIWAN SPECIALITY CHEMICALS Business Summary

Taiwan Speciality Chemicals Corp (TSC) operates a high-margin manufacturing model centered on the production and global distribution of ultra-high-purity specialty electronic gases (SEG) and chemicals (SEC). Revenue is primarily derived from the sale of silicon-based precursors, including electronic-grade disilane (Si2H6), trisilane (Si3H8), and silane (SiH4), which are essential for chemical vapor deposition (CVD) and epitaxial processes in advanced semiconductor nodes. In August 2025, the company vertically integrated its service offerings by acquiring a 65.22% stake in Hung Jie Technology, adding semiconductor equipment cleaning and precision parts maintenance to its portfolio. TSC currently ranks as the world’s third-largest manufacturer of trisilane by market share, competing directly with global giants such as Air Liquide, SK Specialty, Mitsui Chemicals, and ASM International. Within the semiconductor ecosystem, TSC maintains a critical position as a strategic Tier-1 supplier to TSMC, specifically supporting the fabrication of sub-5nm logic and advanced 3D NAND memory. Leadership is spearheaded by Chairwoman Doris Hsu (Hsiu-Lan Hsu), a highly influential figure in the global semiconductor supply chain who concurrently serves as the Chairperson of Sino-American Silicon Products Inc. (SAS) and GlobalWafers Co. The executive team is led by CEO and General Manager Hsiung-Fei (Andrew) Chang, who has overseen the company’s transition from a niche gas producer to a publicly listed industry leader since 2020. TSC was founded in 2013 as a strategic venture within the SAS Group ecosystem, which remains its largest shareholder with an approximate 30% stake. The company’s board and strategic direction are heavily influenced by the SAS Group’s pedigree in silicon wafer manufacturing, providing TSC with unique cross-industry synergies and a robust capital base supported by institutional investors such as Yuanta and Fubon Asset Management.