ASE TECHNOLOGY HOLDING Business Summary

ASE Technology Holding Co., Ltd. (3711.TW) is the global leader in the outsourced semiconductor assembly and test (OSAT) market, commanding an estimated 35–40% market share. The company operates a vertically integrated business model generating revenue through three primary segments: Assembly, Testing, and Materials (ATM), and Electronic Manufacturing Services (EMS). Its ATM division provides advanced packaging solutions—including Fan-Out, System-in-Package (SiP), and 2.5D/3D integration—while the EMS segment, primarily through its subsidiary USI, offers end-to-end design and manufacturing for communications, automotive, and consumer electronics. As of early 2026, the company is aggressively scaling its Leading-Edge Advanced Packaging (LEAP) services to capture surging demand from AI and high-performance computing (HPC) sectors, with LEAP revenue projected to reach US$3.2 billion this year. ASE fits as the dominant independent provider in a landscape where it competes directly with Amkor Technology and JCET Group for high-end packaging contracts, while increasingly navigating the competitive overlap with foundries like TSMC that offer in-house advanced packaging such as CoWoS. Founded in 1984 by brothers Jason C.S. Chang and Richard H.P. Chang, the company is led by a veteran executive team with deep technical and financial pedigree. Jason C.S. Chang serves as the Chairman and Principal Executive Officer (CEO), while Richard H.P. Chang holds the roles of Vice Chairman and President. The leadership team is bolstered by Group COO Dr. Tien Wu, a key strategist in the company’s AI-driven expansion, and Group CFO Joseph Tung, who oversees capital allocation and the firm’s multi-billion dollar CapEx programs. The board of directors recently integrated next-generation leadership, including Chief Procurement Officer Andrew Tang and Director Dan-Yao Chang. ASE maintains a robust institutional investor base, with major holdings from BlackRock, Lazard Asset Management, and Vanguard, while the founding Chang family retains a significant insider stake of approximately 28%, ensuring long-term strategic alignment with the company’s foundational roots in Kaohsiung, Taiwan.