On June 18, Amkor Technology rose 6.28% in regular trading, trading at $90.51/share, with turnover of $39.35 million. The rally was primarily driven by a ten-year strategic cooperation agreement with TSMC announced on June 16, combined with a major factory expansion plan in South Korea.

According to the agreement, TSMC and Amkor will deepen collaboration to enhance advanced semiconductor packaging capabilities at their Arizona facility. TSMC will procure advanced packaging and test services from Amkor, with both parties coordinating capacity expansion to serve global high-performance computing and AI chip mass production demand. Additionally, Amkor is considering investing approximately 1 trillion Korean won to expand its Gwangju, South Korea factory, with the first phase targeting 500 billion Korean won in investment by 2030. The core driver behind this expansion is the substantial increase in packaging and testing orders from TSMC, as existing production lines can no longer accommodate the rapidly growing order volume.

The broader Semiconductor Equipment sector also traded strongly, with Applied Materials up 6.39%, Lam Research up 6.37%, KLA-Tencor up 5.78%, Teradyne up 5.27%, and ASML up 3.17%.

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