ASE Technology's stock surged 5.07% in post-market trading on Thursday, continuing its recent upward momentum.

The significant price increase follows the company's announcement of robust first-quarter financial performance and multiple capacity expansion initiatives. ASE reported March consolidated net revenue of NT$61.58 billion, representing a 14.6% year-over-year increase and an 18.2% sequential growth. The company's core ATM (Assembly, Testing, and Materials) business posted Q1 revenue of NT$112.43 billion, surging 29.7% year-over-year, reflecting persistently strong downstream packaging and testing demand.

Additionally, ASE is pursuing strategic expansion through the planned acquisition of Innolux's Nanke Fab5 facility for NT$14.85 billion to address advanced packaging capacity gaps. The company has also broken ground on a new factory in Kaohsiung's Renwu Industrial Park, targeting AI, high-performance computing, and automotive electronics testing services, with estimated annual output value of approximately NT$177.3 billion at full capacity. The company is scheduled to report its latest quarterly results on April 29, with analysts projecting continued revenue growth.