AMKOR TECHNOLOGY, INC. (AMKR)

Nasdaq · Common Stock · Semiconductors & Related Devices

One email a week from me: what it filed, which 13F holders added or cut, where its scores stand. Free.

a semiconductor product packaging and test services provider

Corporate structure

19 entities across 13 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-20 — see the exhibit.

Which other public companies file entities in the same places:

Taiwan3 Singapore3 Philippines2 Delaware2 China1 Arizona1 France1 Germany1 Japan1 Korea1 Malaysia1 Vietnam1

Subsidiaries of AMKOR TECHNOLOGY, INC. as disclosed in its SEC filing
Entity	Jurisdiction	Note
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

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

4 / 9

PASSReturn on assets positiveROA 4.6%
PASSOperating cash flow positiveOCF 1.1B
FAILReturn on assets improving5.1% → 4.6%
PASSCash flow exceeds earningsOCF 1.1B vs NI 374M
FAILLong-term debt ratio falling13.3% → 15.8% of assets
PASSCurrent ratio improving2.11 → 2.27
FAILNo share dilution248M → 248M shares
FAILGross margin improving14.8% → 14.0%
FAILAsset turnover improving0.91× → 0.82×

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$5.1B	$338.1M	$217.0M	17.8%	242,248,000
FY2021	$6.1B	$643.0M	$341.5M	20.0%	245,704,000
FY2022	$7.1B	$765.8M	$190.5M	18.8%	246,205,000
FY2023	$6.5B	$359.8M	$520.6M	14.5%	247,176,000
FY2024	$6.3B	$354.0M	$345.1M	14.8%	247,818,000
FY2025	$6.7B	$373.9M	$191.0M	14.0%	248,454,000

Ownership flow

14 institutions tracked — 7 added, 5 reduced, 2 opened a new position, 1 sold out. Active managers added 927,669 shares while index money cut 506,322.

Institutional holders of AMKOR TECHNOLOGY, INC. and their share-count change
Manager	Kind	Shares	Change	Value
Bridgewater Associates, LP	Hedge fund	7,145	−1,573,784	$616,113
CITADEL ADVISORS LLC	Hedge fund	2,031,238	+1,150,597	$175.2M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	1,659,478	+913,054	$143.1M
BlackRock, Inc.	Index	12,292,760	−676,005	$1.1B
FMR LLC	Active fund	836,386	+578,922	$72.1M
Point72 Asset Management, L.P.	Hedge fund	2,565,226	−571,008	$221.2M
JPMORGAN CHASE & CO	Active fund	5,702,608	+296,063	$470.0M
MORGAN STANLEY	Active fund	1,525,685	+152,877	$131.6M
STATE STREET CORP	Index	3,730,584	+102,042	$321.7M
GEODE CAPITAL MANAGEMENT, LLC	Index	2,798,149	+67,641	$241.3M
AQR CAPITAL MANAGEMENT LLC	Hedge fund	3,231,546	−10,584	$273.8M
BANK OF AMERICA CORP /DE/	Active fund	265,073	−8,468	$22.9M

NORGES BANK, RENAISSANCE TECHNOLOGIES LLC hold a position with no prior filing to compare against, so their change is unknown rather than zero — and they are left out of the totals above.

From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.

Identity

CIK: 0001047127
LEI: 529900VHLRTKPWZJBM84
FIGI: BBG000BCKGW7
SIC: 3674 · Semiconductors & Related Devices
Incorporated: DE
Headquarters: TEMPE, AZ
Founded: 1968-01-01

Ownership

Institutional: 48.6%
Institutions: 835
Insiders: 49.9%

Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.

Other semiconductors & related devices companies

AMKOR TECHNOLOGY, INC. files under SIC 3674 — all 36 semiconductors & related devices companies compared on assets and F-score.

INTEL CORPINTC NVIDIA CORPNVDA Broadcom Inc.AVGO MICRON TECHNOLOGY INCMU ADVANCED MICRO DEVICES INCAMD ANALOG DEVICES INCADI

Questions about AMKOR TECHNOLOGY, INC.

How many subsidiaries does AMKOR TECHNOLOGY, INC. file with the SEC?: 19, listed in its most recent exhibit 21. They are incorporated across 13 jurisdictions, led by Taiwan, China, Arizona. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.
Is AMKOR TECHNOLOGY, INC. financially healthy?: AMKOR TECHNOLOGY, INC. scores 4 out of 9 on the Piotroski F-score. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.
Who are the largest institutional holders of AMKOR TECHNOLOGY, INC.?: Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), JPMORGAN CHASE & CO (adding), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

This page is one panel of the terminal

The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.

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Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.

Corporate structure

19 entities across 13 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-20 — see the exhibit.

Entity

Jurisdiction

Note

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

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

4 / 9

PASSReturn on assets positiveROA 4.6%
PASSOperating cash flow positiveOCF 1.1B
FAILReturn on assets improving5.1% → 4.6%
PASSCash flow exceeds earningsOCF 1.1B vs NI 374M
FAILLong-term debt ratio falling13.3% → 15.8% of assets
PASSCurrent ratio improving2.11 → 2.27
FAILNo share dilution248M → 248M shares
FAILGross margin improving14.8% → 14.0%
FAILAsset turnover improving0.91× → 0.82×

Year

Revenue

Net income

Free cash flow

Gross margin

FY2020

$5.1B

$338.1M

$217.0M

17.8%

242,248,000

FY2021

$6.1B

$643.0M

$341.5M

20.0%

245,704,000

FY2022

$7.1B

$765.8M

$190.5M

18.8%

246,205,000

FY2023

$6.5B

$359.8M

$520.6M

14.5%

247,176,000

FY2024

$6.3B

$354.0M

$345.1M

14.8%

247,818,000

FY2025

$6.7B

$373.9M

$191.0M

14.0%

248,454,000

Ownership flow

14 institutions tracked — 7 added, 5 reduced, 2 opened a new position, 1 sold out. Active managers added 927,669 shares while index money cut 506,322.

Institutional holders of AMKOR TECHNOLOGY, INC. and their share-count change
Manager	Kind	Shares	Change	Value
Bridgewater Associates, LP	Hedge fund	7,145	−1,573,784	$616,113
CITADEL ADVISORS LLC	Hedge fund	2,031,238	+1,150,597	$175.2M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	1,659,478	+913,054	$143.1M
BlackRock, Inc.	Index	12,292,760	−676,005	$1.1B
FMR LLC	Active fund	836,386	+578,922	$72.1M
Point72 Asset Management, L.P.	Hedge fund	2,565,226	−571,008	$221.2M
JPMORGAN CHASE & CO	Active fund	5,702,608	+296,063	$470.0M
MORGAN STANLEY	Active fund	1,525,685	+152,877	$131.6M
STATE STREET CORP	Index	3,730,584	+102,042	$321.7M
GEODE CAPITAL MANAGEMENT, LLC	Index	2,798,149	+67,641	$241.3M
AQR CAPITAL MANAGEMENT LLC	Hedge fund	3,231,546	−10,584	$273.8M
BANK OF AMERICA CORP /DE/	Active fund	265,073	−8,468	$22.9M

NORGES BANK, RENAISSANCE TECHNOLOGIES LLC hold a position with no prior filing to compare against, so their change is unknown rather than zero — and they are left out of the totals above.

Questions about AMKOR TECHNOLOGY, INC.

How many subsidiaries does AMKOR TECHNOLOGY, INC. file with the SEC?

19, listed in its most recent exhibit 21. They are incorporated across 13 jurisdictions, led by Taiwan, China, Arizona. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is AMKOR TECHNOLOGY, INC. financially healthy?

AMKOR TECHNOLOGY, INC. scores 4 out of 9 on the Piotroski F-score. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of AMKOR TECHNOLOGY, INC.?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), JPMORGAN CHASE & CO (adding), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.