Packaging Giant Expands AI Semiconductor Factories... $10 Billion Vanished from US Stock Market in a Day

In US trading, shares of ASE Technology Holding Co., Ltd. (ASX) plunged 11.85% to $33.85 amid a semiconductor sell-off. Volume topped 7.17 million shares, and the company’s market capitalization fell to about $74 billion (roughly KRW 100 trillion), wiping out some $8 billion (around KRW 11 trillion) in a single session.

ASE Technology Holding recently revealed a 310 mm × 310 mm automated panel-level packaging line, ramping up its investment in advanced packaging for next-generation AI and high-performance computing (HPC). The company has maintained an aggressive expansion strategy, including a record capital expenditure plan of roughly $7 billion in 2026.

Headquartered in Taiwan, ASE Technology Holding is one of the world’s largest outsourced semiconductor assembly and test (OSAT) providers, competing for the top global share in advanced AI packaging. Since reorganizing as a holding company in 2018, it has been listed simultaneously in Taiwan and New York, and its American Depositary Receipts (ADRs) are regarded as key downstream investments directly linked to the AI semiconductor supply chain.