Seagate, Amtech, and Amkor Shares Are Falling, What You Need To Know

What Happened?

A number of stocks fell in the afternoon session after a major U.S. wafer-fab equipment company disclosed an expected revenue headwind for fiscal 2026 tied to an export-control update from the Bureau of Industry and Security (BIS). 

The disclosure pointed to new limits on exporting certain advanced tools and providing services to specific customers in China without a license. This revived investor fears of a broader demand reset for the semiconductor equipment group, as the restrictions could negatively impact both sales growth and profitability for companies operating in the region. A broader decline among chip stocks followed a weak second-quarter forecast from industry peer ASML. The sector-wide slide also affected other major companies, including Micron and Advanced Micro Devices. The dip in chip stocks was also potentially linked to profit-taking after the sector had experienced several days of solid rallies.

The stock market overreacts to news, and big price drops can present good opportunities to buy high-quality stocks.

Among others, the following stocks were impacted:

• Memory Semiconductors company Seagate (NASDAQ:STX) fell 2.5%. Is now the time to buy Seagate? Access our full analysis report here, it’s free.
• Semiconductor Manufacturing company Amtech (NASDAQ:ASYS) fell 2.6%. Is now the time to buy Amtech? Access our full analysis report here, it’s free.
• Semiconductor Manufacturing company Amkor (NASDAQ:AMKR) fell 2.7%. Is now the time to buy Amkor? Access our full analysis report here, it’s free.

Zooming In On Amkor (AMKR)

Amkor’s shares are extremely volatile and have had 41 moves greater than 5% over the last year. In that context, today’s move indicates the market considers this news meaningful but not something that would fundamentally change its perception of the business.

The previous big move we wrote about was 7 days ago when the stock gained 11.8% on the news that the VanEck Semiconductor ETF jumped nearly 5% in response to the de-escalation of the U.S.-Iran conflict. The sector rallied specifically because semiconductors were highly vulnerable to the supply chain disruptions that occurred during the war. The reopening of the Strait of Hormuz is a critical victory for the industry, as the waterway is essential for the transit of noble gases and materials used in chip fabrication.

Amkor is up 39.1% since the beginning of the year, and at $59.70 per share, it is trading close to its 52-week high of $61.32 from April 2026. Investors who bought $1,000 worth of Amkor’s shares 5 years ago would now be looking at an investment worth $2,477.

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