Amkor Technology, Inc.
Amkor Technology, Inc. (NASDAQ: AMKR) operates as the world's largest U.S. headquartered outsourced semiconductor assembly and test service provider. The company delivers comprehensive packaging and test solutions that enable leading semiconductor and electronics manufacturers to bring advanced technologies to market.… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Amkor Technology, Inc. does
In the company’s own words
Amkor Technology, Inc. (NASDAQ: AMKR) operates as the world's largest U.S. headquartered outsourced semiconductor assembly and test service provider. The company delivers comprehensive packaging and test solutions that enable leading semiconductor and electronics manufacturers to bring advanced technologies to market. Amkor's website is www.amkor.com.
The company provides turnkey packaging and test services including wafer bump, wafer probe, wafer back-grind, package design, packaging, burn-in, system level and final test services. Its Advanced Products segment, representing 82.8 percent of 2025 net sales of $6.7 billion, encompasses flip chip, memory, and wafer-level processing technologies. The Mainstream Products segment comprises wirebond packaging and power device packaging solutions. Advanced system-in-package modules generated approximately $3.1 billion in annual sales, combining multiple semiconductor and electronic components into single packages for applications ranging from smartphones to data centers.
Amkor serves integrated device manufacturers, fabless semiconductor companies, original equipment manufacturers, and contract foundries. The company's end market distribution reflects significant exposure to communications devices at 46 percent of sales, computing applications at 20 percent, automotive and industrial at 19 percent, and consumer electronics at 15 percent. Apple and Qualcomm represent major customers, accounting for 29.8 percent and 11.1 percent of 2025 net sales respectively, with the ten largest customers representing 72 percent of total sales.
The company operates a geographically diverse manufacturing footprint spanning 12 countries across Asia-Pacific, Europe, and the United States, with approximately 30,800 employees as of December 31, 2025. Amkor is expanding its U.S. presence through construction of a new facility in Arizona while scaling production at its Vietnam facility opened in 2024. The company maintains technology leadership through substantial research and development investments focused on heterogeneous integration, wafer-level packaging, copper hybrid bonding, co-packaged optics, and advanced automotive packaging solutions. Amkor's competitive positioning derives from advanced packaging technology, manufacturing scale and expertise, customer co-development capabilities, quality and reliability, and disciplined capital investment strategies.
Company details
- Sector
- Information Technology
- Industry (SIC)
- Semiconductors
- Headquarters
- TEMPE, AZ
- Fiscal year end
- December
- CIK
- 1047127
- SIC
- 3674
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Amkor Technology, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Amkor Technology, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Amkor Technology, Inc.’s bonds, as funds hold them
Funds report holding 2 issues of Amkor Technology, Inc.’s debt, $225.44M at market value — what funds hold, not the company’s total debt. Weighted-average coupon 5.88%, maturing 2031 to 2033.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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