Amkor Technology Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

DB:AMK Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
11 May 26	Sell€983,952	Gil Tily	Individual	15,000	€65.60
08 May 26	Sell€3,155,414	Marie Rutten Guillaume	Individual	50,000	€63.11
05 May 26	Sell€457,232	Winston Churchill	Individual	7,000	€65.32
25 Feb 26	Sell€625,710	Farshad Haghighi	Individual	14,625	€42.78
24 Feb 26	Sell€383,051	Marie Rutten Guillaume	Individual	9,252	€41.40
24 Feb 26	Sell€494,742	Kevin Engel	Individual	11,962	€41.36
17 Feb 26	Sell€176,300	Kevin Engel	Individual	4,530	€38.92
12 Feb 26	Buy€408,625,230	James Kim	Individual	10,000,000	€40.86
15 Jan 26	Sell€457,748	Marie Rutten Guillaume	Individual	10,000	€45.77
12 Dec 25	Sell€791,245	Gil Tily	Individual	20,000	€39.56
12 Dec 25	Sell€433,029	Kevin Engel	Individual	11,000	€39.37
09 Sep 25	Sell€251,553	Farshad Haghighi	Individual	11,792	€21.33
01 Aug 25	Buy€8,356,756	James J Kim Family Control Group	Company	441,589	€18.92
01 Aug 25	Buy€8,356,756	James J Kim Family Control Group	Company	441,589	€18.92
01 Aug 25	Sell€8,356,756	James Kim	Individual	441,589	€18.92
31 Jul 25	Sell€309,228	Mark Rogers	Individual	15,000	€20.62

Insider Trading Volume

Insider Buying: AMK insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of AMK?
Owner Type	Number of Shares	Ownership Percentage
State or Government	95,820	0.0387%
General Public	11,124,336	4.49%
Private Companies	37,841,951	15.3%
Individual Insiders	74,404,721	30%
Institutions	124,405,690	50.2%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 71.38% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
14%	James Kim	34,727,364	€2.6b	0%	no data
7.86%	Sujochil, LP	19,484,809	€1.5b	0%	no data
7.61%	Susan Kim	18,860,698	€1.4b	0.11%	no data
5.89%	John Kim	14,597,064	€1.1b	-12.6%	no data
5.23%	BlackRock, Inc.	12,968,765	€972.6m	0.35%	0.01%
4.43%	Dimensional Fund Advisors LP	10,991,469	€824.3m	-13.9%	0.11%
3.67%	Vanguard Portfolio Management, LLC	9,095,848	€682.1m	0%	0.04%
3.36%	Family Trust Under The John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18	8,326,914	€624.5m	0%	no data
2.19%	Vanguard Capital Management, LLC	5,434,318	€407.5m	0%	0.01%
1.53%	James J Kim Family Control Group	3,789,479	€284.2m	0%	no data
1.46%	State Street Global Advisors, Inc.	3,628,542	€272.1m	4.45%	0.01%
1.38%	EARNEST Partners, LLC	3,431,843	€257.4m	-9.51%	1.03%
1.29%	AQR Capital Management, LLC	3,198,574	€239.9m	-1.78%	0.11%
1.21%	Point72 Asset Management, L.P.	2,993,434	€224.5m	-2.31%	0.4%
1.13%	JPMorgan Chase & Co.	2,796,014	€209.7m	1,850%	0.03%
1.1%	Geode Capital Management, LLC	2,730,508	€204.8m	22.3%	0.01%
1.09%	American Century Investment Management Inc	2,713,260	€203.5m	-24.1%	0.08%
1.06%	Principal Global Investors, LLC	2,622,744	€196.7m	19.3%	0.09%
1.05%	JP Morgan Asset Management	2,610,288	€195.8m	1,250%	0.02%
0.94%	Jane Street Group, LLC	2,329,820	€174.7m	3,580%	0.17%
0.85%	Charles Schwab Investment Management, Inc.	2,101,538	€157.6m	0.1%	0.02%
0.81%	Fisher Asset Management, LLC	2,010,982	€150.8m	-4.01%	0.05%
0.79%	John T. Kim 2012 Generation-Skipping Trust U/A Dated 12/11/12	1,957,350	€146.8m	0%	no data
0.72%	First Trust Advisors LP	1,793,537	€134.5m	-34.1%	0.08%
0.7%	Invesco Capital Management LLC	1,734,815	€130.1m	78.3%	0.03%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/06/18 09:37
End of Day Share Price	2026/06/17 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Amkor Technology, Inc. is covered by 14 analysts. 10 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Steven Liu	Aletheia Analyst Network Limited
Christopher Muse	Barclays
Craig Ellis	B. Riley Securities, Inc.