Strong Performance Semiconductor Backend Leader Loses 5 Trillion Won in Market Cap in One Day

ASE Technology Holding ADR (NYSE: ASX), listed on the New York Stock Exchange, closed at $31.87 on May 18, down 5.75%, with trading volume exceeding 5.2 million shares. Its market capitalization stood at approximately $69.9 billion (about KRW 94 trillion), erasing nearly $3.8 billion (around KRW 5 trillion) compared with the previous day.

In its Q1 2026 earnings report announced at the end of April, the company confirmed significant year-on-year profit growth and margin improvement. Last month, it broke ground on a new facility in Taiwan’s Kaohsiung Renwu Industrial Park to build an advanced semiconductor testing cluster, continuing its large-scale capital investments.

Headquartered in Kaohsiung, Taiwan, ASE Technology is one of the world’s largest providers of semiconductor packaging and testing outsourcing services. The company handles back-end processes for global foundries and fabless firms, and is widely regarded as a key beneficiary of rising AI and high-performance computing demand.