Amkor Technology Expands U.S. Advanced Packaging Footprint with Additional Land in Arizona

Enables future capacity to support rising demand for Advanced packaging and test

TEMPE, Ariz.-- May 19, 2026 -- Amkor Technology, Inc. (Nasdaq: AMKR) today reinforced its commitment to expanding Advanced semiconductor packaging and test capabilities in the United States through continued investment in its Arizona manufacturing footprint.

Located within Peoria’s Innovation Core, Amkor’s campus is being developed on a 104-acre site designed to support large-scale, leading-edge semiconductor packaging and test capabilities. As part of its long-term growth strategy, Amkor has now secured an additional 67-acre parcel adjacent to the existing campus, providing strategic flexibility to support future expansion and evolving customer demand.

This expansion builds on Amkor’s previously announced state-of-the-art Advanced packaging and test campus in Arizona. The campus is expected to be the first high-volume Advanced packaging OSAT facility in the United States, supporting the growing demand for advanced semiconductor solutions across artificial intelligence, high-performance computing, automotive, and communications markets.

“Amkor’s investment in Arizona represents a significant step in building advanced semiconductor manufacturing capacity in the United States,” said Kevin Engel, president and chief executive officer of Amkor Technology. “Our continued expansion in Arizona strengthens our ability to support customers with leading-edge packaging and test solutions while contributing to a more resilient global supply chain.”

To hear more about Amkor’s strategic priorities and positioning in the semiconductor industry, register for the Investor Day webcast taking place on Thursday, May 21.

About Amkor Technology, Inc.

Amkor Technology, Inc. (Nasdaq: AMKR) is the world’s largest U.S. headquartered OSAT and is a global leader in outsourced semiconductor packaging and test services. With a strong track record of innovation, a broad and diverse geographic footprint and solid partnerships with lead customers, Amkor delivers high-quality solutions that enable the world’s leading semiconductor and electronics companies to bring advanced technologies to market. The company’s comprehensive portfolio includes advanced packaging, wafer-level processing, and system-in-package solutions targeting applications for smartphones, data centers, artificial intelligence, automobiles and wearables. For more information visit amkor.com.