On June 29, ASE Technology fell 3.71% in regular trading, trading at $38.585/share, with turnover of approximately $83.8 million. The decline was driven by a sector-wide semiconductor selloff combined with sentiment pressure from a controlling shareholder share reduction announcement.

On the sector front, semiconductor stocks experienced broad-based selling pressure. Among major peers, Micron Technology fell 9.03%, Intel dropped 7.09%, Marvell Technology declined 5.58%, Advanced Micro Devices lost 4.16%, and NVIDIA slipped 0.95%, reflecting systematic sector weakness that weighed heavily on ASE Technology.

Additionally, on June 28, ASE Technology Holdings, the company's indirect controlling shareholder, announced plans to reduce its stake in subsidiary Universal Scientific Industrial by up to 2% (approximately 47.78 million shares) through block trades between July 21 and October 20, citing capital needs. The reference to \"capital requirements\" triggered market concerns about the group's financial position, creating short-term sentiment overhang on ASE Technology shares despite the company's strong fundamentals including 29% year-over-year revenue growth in May and aggressive 15-site expansion plans.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)