On the Record · Amkor Technology
Amkor Technology subsidiaries, as it lists them
The subsidiaries Amkor Technology lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| Amkor Advanced Technology Taiwan, Inc. | Taiwan |
| Amkor Assembly & Test (Shanghai) Co., Ltd. | China |
| Amkor Technology Arizona, Inc. | Arizona |
| Amkor Technology Euroservices, S.A.S. | France |
| Amkor Technology Germany GmbH | Germany |
| Amkor Technology Japan, Inc. | Japan |
| Amkor Technology Korea, Inc. | Korea |
| Amkor Technology Malaysia Sdn. Bhd. | Malaysia |
| Amkor Technology Philippines, Inc. (A Branch of a Singapore Company) | Philippines |
| Amkor Technology Pte. Ltd. | Singapore |
| Amkor Technology Singapore Investment Pte. Ltd. | Singapore |
| Amkor Technology Singapore Holding Pte. Ltd. | Singapore |
| Amkor Technology Singapore Holding Pte. Ltd., Taiwan Branch (A Branch of a Singapore Company) | Taiwan |
| Amkor Technology Taiwan Ltd. | Taiwan |
| Amkor Technology Vietnam Limited Liability Company | Vietnam |
| Amkor Worldwide Services LLC | Delaware |
| Amkor Worldwide Services LLC - ROHQ (A Branch of a United States Company) | Philippines |
| ATEP - Amkor Technology Portugal, S.A. | Portugal |
| Guardian Assets, Inc. | Delaware |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Amkor Technology’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-20. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.