ASE Technology Holding Co. Business Summary

ASE Technology Holding Co., Ltd. (ASEH) is the world’s largest provider of outsourced semiconductor assembly and test (OSAT) services, generating revenue through high-volume contract manufacturing for integrated circuit (IC) packaging, design, and testing. The company operates through two primary business segments: the Assembly, Test, and Materials (ATM) division, which provides advanced solutions such as System-in-Package (SiP), Fan-out Wafer-Level Packaging (FOWLP), and 2.5D/3D IC integration; and the Electronic Manufacturing Services (EMS) segment, primarily managed via its subsidiary Universal Scientific Industrial (USI). As of March 2026, ASEH has pivoted aggressively toward its Leading-Edge Advanced Packaging (LEAP) platform to capture surging demand from AI, high-performance computing (HPC), and automotive sectors, with LEAP revenues projected to double to $3.2 billion this year. Its primary direct competitors include Amkor Technology, JCET Group, and Tongfu Microelectronics (TFME); ASEH maintains a dominant market position with an estimated 40% share of the global OSAT market, distinguishing itself through its massive scale and 'ATM' synergy that integrates materials and testing into a unified turnkey solution. The company was founded in 1984 by brothers Jason C.S. Chang and Richard H.P. Chang, who remain central to its strategic direction as Chairman and Vice Chairman/President, respectively. The executive leadership is anchored by Group COO Dr. Tien Wu, a veteran with a Ph.D. from the University of Pennsylvania and a background at IBM, who is credited with spearheading the firm’s global expansion and technological roadmap. Group CFO Joseph Tung manages the company's complex capital allocation, including a record $7 billion CapEx plan for 2026 focused on advanced packaging capacity. The board of directors features seasoned industry figures such as Chief Procurement Officer Andrew Tang and independent directors like Mei-Yueh Ho, supported by a robust institutional investor base including BlackRock and Vanguard, alongside the Chang family’s significant private holdings. This leadership team combines deep technical expertise with a proven track record of navigating the cyclical semiconductor landscape and geopolitical supply chain shifts.