On September 24, United Microelectronics fell 3.04% in regular trading, trading at $23.915/share, with turnover of $38.76 million. The decline came amid heightened caution following intensive insider selling by senior executives and broad weakness across the semiconductor sector.

On the news front, United Microelectronics recently disclosed multiple insider transactions. Executive LIN JEN-TSUNG sold 10,000 shares on September 22, while executive Liu Chitung sold a combined 1.6 million shares between September 16 and 17. The concentrated insider disposals have weighed on market sentiment in the near term.

Meanwhile, the semiconductor sector saw broad-based selling pressure. Among major peers, Broadcom fell 2.14%, Micron Technology dropped 1.79%, NVIDIA declined 1.71%, and Advanced Micro Devices slipped 0.38%, with sector-wide weakness exerting additional drag on the stock. Notably, United Microelectronics had previously gained over 6% across two sessions fueled by mature-node wafer pricing optimism, making the current pullback partly a technical retracement from recent strength.

(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.)