Insider Transactions Reported by 55 Insiders of AMKOR TECHNOLOGY, INC.

Symbol: AMKR on Nasdaq
Location: Tempe, AZ

Quick Takeaways

AMKR - AMKOR TECHNOLOGY, INC. has 55 insiders with reported activity on this page.
Net insider value flow over the last year: -$951,259,411.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $48,243,598; sell value: $999,503,008.
Net share flow: -18,926,465.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$951,259,411.

Buys

$48,243,598

Shares: 2,207,945

Insiders: 5

Sells

$999,503,009

Shares: 21,134,410

Insiders: 11

Net

-$951,259,411

Shares: -18,926,465

Insiders: -6

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	20,088,440	$0	$974,113,082	-$974,113,082
3-6	0	126,000	$0	$5,143,960	-$5,143,960
6-9	2,207,945	919,970	$48,243,598	$20,245,966	+$27,997,632
9-12	0	0	$0	$0	$0

AMKOR TECHNOLOGY, INC. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
John T. Kim	Member of 10% owner group (6), 10%+ Owner	$4,398,838,899	-$475,251,280	-9.8%	Mixed	12 Feb 2026
Susan Y. Kim	Director, Member of 10% owner group (6), 10%+ Owner	$1,662,740,621	+$9,648,720	+0.58%	Mixed	31 Mar 2026
915 Investments, LP	Member of 10% owner group (2)	$1,435,060,580	-$484,900,000	-25%	Filing P/S	12 Feb 2026
Kim Capital Partners - KCP, LLC	Member of 10% owner group (3)	$534,741,376			Mixed	14 Nov 2023
Agnes C. Kim	Member of 10% owner group (3)	$355,835,944	-$9,648,720	-2.6%	Mixed	26 Dec 2025
James J. Kim	Member of 10% owner group (4), 10%+ Owner	$355,835,943	-$9,648,720	-2.6%	Mixed	26 Dec 2025
David D. Kim	Member of 10% owner group (5)	$141,980,797	+$9,648,720	+7.3%	Mixed	01 Aug 2025
SUJODA Investments, LP	Member of 10% owner group (2)	$82,800,116	+$9,648,720	+13%	Filing P/S	01 Aug 2025
Sujoda Management, LLC	Member of 10% owner group (4)	$82,800,116	+$9,648,720	+13%	Filing P/S	01 Aug 2025
2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024	Member of 10% owner group (2)	$39,717,600			Mixed	20 Nov 2025
2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024	Member of 10% owner group (2)	$36,147,840			Mixed	20 Nov 2025
Kim 2024 Grat #1 Dtd. 08/09/2024 John T.	Member of 10% owner group	$33,909,600			Mixed	04 Nov 2025
2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024	Member of 10% owner group (2)	$28,783,200			Mixed	20 Nov 2025
Guillaume Marie Jean Rutten	Director	$22,048,113	-$3,338,500	-13%	Mixed	31 Mar 2026
Family Trust Under the John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18	Member of 10% owner group (2)	$15,943,424			Mixed	27 Jul 2023
David N. Watson	Director	$6,043,806			Mixed	31 Mar 2026
Gil C. Tily	Director	$5,790,526	-$928,800	-14%	Mixed	31 Mar 2026
Megan Faust	Cfo	$5,371,531			Mixed	31 Mar 2026
Susan Y. Kim 2012 Generation-Skipping Trust U/A Dated December 11, 2012	Member of 10% owner group (2)	$5,269,696			Mixed	27 Dec 2021
Susins, LLC	Member of 10% owner group (2)	$5,269,696			Mixed	27 Dec 2021
MaryFrances McCourt	Director	$2,614,322	-$920,400	-26%	Mixed	31 Mar 2026
Robert R. Morse	Director	$2,092,341			Mixed	31 Mar 2026
Mark N. Rogers	EVP & General Counsel	$1,734,664	-$2,550,227	-60%	Mixed	16 Mar 2026
Roger A. Carolin	Director	$1,691,245			Mixed	31 Mar 2026
Kim 2024 Grat #2 Dtd. 08/09/2024 John T.	Member of 10% owner group	$1,682,700			Mixed	04 Nov 2025
Winston J. Churchill	Director	$1,187,555	-$221,450	-16%	Mixed	31 Mar 2026
John Charles Stone	Executive Vice President	$1,057,216			Mixed	11 Feb 2022
Daniel Jl Liao	Director	$754,229			Mixed	31 Mar 2026
Douglas A. Alexander	Director	$549,801			Mixed	31 Mar 2026
Sung Shin	Executive Vice President	$493,376			Mixed	01 Jun 2023
Farshad Haghighi	Executive Vice President	$463,143	-$1,083,812	-70%	Mixed	24 Feb 2026
Kevin K. Engel	President and CEO, Director	$333,314	-$1,362,380	-80%	Mixed	31 Mar 2026
John D. Liu	Director	$72,457			Mixed	23 Sep 2025
Cherie Buntyn	Chief Accounting Officer	$0			Mixed	12 Mar 2026
2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023	Member of 10% owner group (3)	$0			Mixed	01 Aug 2025
2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023	Member of 10% owner group (2)	$0			Mixed	26 Dec 2025
James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021	Member of 10% owner group (3)	$0			Mixed	17 Jan 2025
2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023	Member of 10% owner group (3)	$0			Mixed	01 Aug 2025
Dylan Investments, LLC	Member of 10% owner group (2)				Mixed	14 Nov 2023
Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement dated 04/01/2020	Member of 10% owner group (3)				Mixed	25 Jul 2023
Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018	Member of 10% owner group (2)				Mixed	19 Oct 2023
Irrevocable Deed of Trust of Susan Y. Kim dated 4/16/98 For the Benefit of Dylan James Panichello	Other*				Mixed	20 Sep 2021
Liam E. Blaney	Member of 10% owner group (4)				Mixed	14 Nov 2023
Irrevocable Deed of Trust of Susan Y. Kim dated 4/16/98 For the Benefit of Jacqueline Mary Panichello	Other*				Mixed	20 Sep 2021
Trust of Kim Susan Y dated 4/16/98 for the benefit of Alexandra Panichello	Other*				Mixed	20 Sep 2021
Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement Dated 12/16/20	Member of 10% owner group (4)				Mixed	22 Dec 2023
Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18	Member of 10% owner group (4)				Mixed	01 Oct 2021
Family Trust Under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement Dated 04/01/2020	Member of 10% owner group (2)				Mixed	14 Nov 2023
Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18	Member of 10% owner group (2)				Mixed	14 Nov 2023
Family Trust Under the Susan Y. Kim 2012 Irrevocable Trust Agreement Dated 7/26/12	Member of 10% owner group (2)				Mixed	14 Nov 2023
Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18	Member of 10% owner group (2)				Mixed	27 Jul 2023
Jacqueline Investments, LLC	Member of 10% owner group (2)				Mixed	14 Nov 2023
Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 04/01/2020	Member of 10% owner group (2)				Mixed	14 Sep 2023
Qualified Annuity Trust under the James J. Kim 2019-1 Qualified Annuity Trust Agreement dtd September10,2019	Member of 10% owner group (4)				Mixed	01 Dec 2022
Alexandra Investments, LLC	Member of 10% owner group (2)				Mixed	14 Nov 2023

Top shareholders of AMKOR TECHNOLOGY, INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
John T. Kim	3/4/5	Member of 10% owner group (6), 10%+ Owner	35%	86,274,619	$4,398,838,899	-$475,251,280	12 Feb 2026	3/4/5
James J. Kim	13D/G 3/4/5	John T. Kim · Member of 10% owner group (4), 10%+ Owner	30%	75,339,103	$3,939,481,696	-$417,988,377	12 Feb 2026	13D/G 3/4/5
Susan Y. Kim	3/4/5	Director, Member of 10% owner group (6), 10%+ Owner	— mixed-class rows	42,124,879 mixed-class rows	$1,662,740,621	+$9,648,720	31 Mar 2026	3/4/5
915 Investments, LP	3/4/5	Member of 10% owner group (2)	12%	29,594,980	$1,435,060,580	-$484,900,000	12 Feb 2026	3/4/5
VANGUARD GROUP INC	13F	Company	6.4%	15,704,172	$620,000,711	—	31 Dec 2025	13F
Kim Capital Partners - KCP, LLC	3/4/5	Member of 10% owner group (3)	— class O/S missing	16,710,668	$534,741,376	—	14 Nov 2023	3/4/5
BlackRock, Inc.	13F	Company	5.2%	12,922,945	$510,197,852	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	5.2%	12,772,891	$504,286,543	—	31 Dec 2025	13F
Agnes C. Kim	3/4/5	Member of 10% owner group (3)	4.3%	10,737,355	$355,835,944	-$9,648,720	26 Dec 2025	3/4/5
EARNEST PARTNERS LLC	13F	Company	1.5%	3,792,424	$149,724,900	—	31 Dec 2025	13F
David D. Kim	3/4/5	Member of 10% owner group (5)	2.6%	6,496,738	$141,980,797	+$9,648,720	01 Aug 2025	3/4/5
AMERICAN CENTURY COMPANIES INC	13F	Company	1.4%	3,576,888	$141,215,610	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	1.4%	3,473,925	$137,150,559	—	31 Dec 2025	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	1.3%	3,299,975	$130,283,016	—	31 Dec 2025	13F
Point72 Asset Management, L.P.	13F	Company	1.2%	3,064,101	$120,970,707	—	31 Dec 2025	13F
LSV ASSET MANAGEMENT	13F	Company	1.1%	2,820,062	$111,336,000	—	31 Dec 2025	13F
FIRST TRUST ADVISORS LP	13F	Company	1.1%	2,722,310	$107,476,953	—	31 Dec 2025	13F
DISCOVERY CAPITAL MANAGEMENT, LLC / CT	13F	Company	1.1%	2,614,934	$103,237,594	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.9%	2,232,211	$88,142,702	—	31 Dec 2025	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.89%	2,199,115	$86,832,678	—	31 Dec 2025	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.85%	2,099,349	$82,882,299	—	31 Dec 2025	13F
SUJODA Investments, LP	3/4/5	Member of 10% owner group (2)	1.5%	3,789,479	$82,800,116	+$9,648,720	01 Aug 2025	3/4/5
Sujoda Management, LLC	3/4/5	Member of 10% owner group (4)	1.5%	3,789,479	$82,800,116	+$9,648,720	01 Aug 2025	3/4/5
Fisher Asset Management, LLC	13F	Company	0.85%	2,095,027	$82,711,678	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.73%	1,806,649	$71,326,577	—	31 Dec 2025	13F
SW Investment Management LLC	13F	Company	0.57%	1,400,000	$55,272,000	—	31 Dec 2025	13F
NORGES BANK	13F	Company	0.55%	1,360,226	$53,701,722	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.51%	1,254,658	$49,533,899	—	31 Dec 2025	13F
Gotham Asset Management, LLC	13F	Company	0.48%	1,192,652	$47,085,901	—	31 Dec 2025	13F
Invesco Ltd.	13F	Company	0.45%	1,115,588	$44,043,415	—	31 Dec 2025	13F
Allianz Asset Management GmbH	13F	Company	0.41%	1,007,634	$39,781,390	—	31 Dec 2025	13F
2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024	3/4/5	Member of 10% owner group (2)	0.5%	1,235,000	$39,717,600	—	20 Nov 2025	3/4/5
Bank of New York Mellon Corp	13F	Company	0.39%	966,992	$38,176,854	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	0.38%	932,711	$36,823,430	—	31 Dec 2025	13F
2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024	3/4/5	Member of 10% owner group (2)	0.46%	1,124,000	$36,147,840	—	20 Nov 2025	3/4/5
SEGALL BRYANT & HAMILL, LLC	13F	Company	0.36%	897,637	$35,438,713	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.36%	895,040	$35,336,179	—	31 Dec 2025	13F
Kim 2024 Grat #1 Dtd. 08/09/2024 John T.	3/4/5	Member of 10% owner group	0.48%	1,194,000	$33,909,600	—	04 Nov 2025	3/4/5
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.32%	794,230	$31,356,200	—	31 Dec 2025	13F
2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024	3/4/5	Member of 10% owner group (2)	0.36%	895,000	$28,783,200	—	20 Nov 2025	3/4/5
ENVESTNET ASSET MANAGEMENT INC	13F	Company	0.29%	720,384	$28,440,772	—	31 Dec 2025	13F
Nuveen, LLC	13F	Company	0.28%	702,565	$27,737,265	—	31 Dec 2025	13F
SG Americas Securities, LLC	13F	Company	0.28%	700,049	$27,638,000	—	31 Dec 2025	13F
Bandera Partners LLC	13F	Company	0.28%	693,519	$27,380,130	—	31 Dec 2025	13F
Guillaume Marie Jean Rutten	3/4/5	Director	— mixed-class rows	553,040 mixed-class rows	$22,048,113	-$3,338,500	31 Mar 2026	3/4/5
TWO SIGMA INVESTMENTS, LP	13F	Company	0.22%	552,782	$21,823,833	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.21%	506,519	$19,997,353	—	31 Dec 2025	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.2%	485,936	$19,184,776	—	31 Dec 2025	13F
Ardmore Road Asset Management LP	13F	Company	0.19%	469,121	$18,520,897	—	31 Dec 2025	13F
FARALLON CAPITAL MANAGEMENT LLC	13F	Company	0.19%	464,000	$18,318,720	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for AMKOR TECHNOLOGY, INC.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Guillaume Marie Jean Rutten	AMKR	Restricted Stock Units	Award				482	482	01 Apr 2026	Direct
David N. Watson	AMKR	Restricted Stock Units	Award	0.18%			18.16	9,893	31 Mar 2026	Direct
Gil C. Tily	AMKR	Restricted Stock Units	Award	0.18%			18.16	9,893	31 Mar 2026	Direct
Guillaume Marie Jean Rutten	AMKR	Common Stock	Options Exercise	1.6%			8,692	552,558	31 Mar 2026	Direct
Guillaume Marie Jean Rutten	AMKR	Restricted Stock Units	Options Exercise	-50%			-8,692	8,692	31 Mar 2026	Direct
Robert R. Morse	AMKR	Restricted Stock Units	Award	0.34%			33.88	9,893	31 Mar 2026	Direct
MaryFrances McCourt	AMKR	Restricted Stock Units	Award	0.34%			33.88	9,893	31 Mar 2026	Direct
Susan Y. Kim	AMKR	Restricted Stock Units	Award	0.18%			18.16	9,893	31 Mar 2026	Direct
Daniel Jl Liao	AMKR	Restricted Stock Units	Award	0.18%			18.16	9,893	31 Mar 2026	Direct
Megan Faust	AMKR	Common Stock	Tax liability	-2.7%			-3,725	134,138	31 Mar 2026	Direct
Megan Faust	AMKR	Common Stock	Options Exercise	6.73%			8,692	137,863	31 Mar 2026	Direct
Megan Faust	AMKR	Restricted Stock Units	Options Exercise	-50%			-8,692	8,692	31 Mar 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Tax liability	-32%			-3,725	7,920	31 Mar 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Options Exercise	294.3%			8,692	11,645	31 Mar 2026	Direct
Kevin K. Engel	AMKR	Restricted Stock Units	Options Exercise	-50%			-8,692	8,692	31 Mar 2026	Direct
Winston J. Churchill	AMKR	Restricted Stock Units	Award	0.18%			18.16	9,893	31 Mar 2026	Direct
Roger A. Carolin	AMKR	Restricted Stock Units	Award	0.34%			33.88	9,893	31 Mar 2026	Direct
Douglas A. Alexander	AMKR	Restricted Stock Units	Award	0.51%			50.03	9,893	31 Mar 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Sale	-11.4%	$222,700	$44.54	-5,000	38,904	16 Mar 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Options Exercise	12.8%			5,000	43,904	16 Mar 2026	Direct
Mark N. Rogers	AMKR	Employee Stock Option (Right-to-Buy)	Options Exercise	-5%			-5,000	95,000	16 Mar 2026	Direct
Cherie Buntyn	AMKR	Restricted Stock Units	Award				799	799	12 Mar 2026	Direct
David N. Watson	AMKR	Common Stock	Tax liability	-1.81%			-2,223	120,757	25 Feb 2026	Direct
David N. Watson	AMKR	Common Stock	Options Exercise	19.4%			20,000	122,980	25 Feb 2026	Direct
David N. Watson	AMKR	Director Stock Option (Right-to-Buy)	Options Exercise	-100%			-20,000	0	25 Feb 2026	Direct
Farshad Haghighi	AMKR	Common Stock	Sale	-65.2%	$789,012	$50.50	-15,624	8,354	25 Feb 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Sale	-80.9%	$609,375	$48.75	-12,500	2,953	24 Feb 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Tax liability	-2.35%			-372	15,453	24 Feb 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Options Exercise	6.1%			910	15,825	24 Feb 2026	Direct
Kevin K. Engel	AMKR	Restricted Stock Units	Options Exercise	-100%			-910	0	24 Feb 2026	Direct
Guillaume Marie Jean Rutten	AMKR	Common Stock	Sale	-3.55%	$976,000	$48.80	-20,000	543,866	24 Feb 2026	Direct
Guillaume Marie Jean Rutten	AMKR	Common Stock	Options Exercise	1.94%			10,748	563,866	24 Feb 2026	Direct
Guillaume Marie Jean Rutten	AMKR	Restricted Stock Units	Options Exercise	-100%			-10,748	0	24 Feb 2026	Direct
Megan Faust	AMKR	Common Stock	Tax liability	-1.15%			-1,497	129,171	24 Feb 2026	Direct
Megan Faust	AMKR	Common Stock	Options Exercise	2.75%			3,493	130,668	24 Feb 2026	Direct
Megan Faust	AMKR	Restricted Stock Units	Options Exercise	-100%			-3,493	0	24 Feb 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Tax liability	-2.03%			-806	38,904	24 Feb 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Options Exercise	4.97%			1,880	39,710	24 Feb 2026	Direct
Mark N. Rogers	AMKR	Restricted Stock Units	Options Exercise	-100%			-1,880	0	24 Feb 2026	Direct
Farshad Haghighi	AMKR	Common Stock	Tax liability	-3.29%			-815	23,978	24 Feb 2026	Direct
Farshad Haghighi	AMKR	Common Stock	Options Exercise	7.89%			1,814	24,793	24 Feb 2026	Direct
Farshad Haghighi	AMKR	Restricted Stock Units	Options Exercise	-100%			-1,814	0	24 Feb 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Tax liability	-44.2%			-6,883	8,707	20 Feb 2026	Direct
Kevin K. Engel	AMKR	Common Stock	Options Exercise	717.8%			16,853	19,201	20 Feb 2026	Direct
Kevin K. Engel	AMKR	Restricted Stock Units	Options Exercise	-71.9%			-16,853	6,583	20 Feb 2026	Direct
Megan Faust	AMKR	Common Stock	Tax liability	-11.4%			-14,960	116,828	20 Feb 2026	Direct
Megan Faust	AMKR	Common Stock	Options Exercise	34.9%			34,911	134,934	20 Feb 2026	Direct
Megan Faust	AMKR	Restricted Stock Units	Options Exercise	-67.5%			-34,911	16,810	20 Feb 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Tax liability	-17.4%			-6,905	32,864	20 Feb 2026	Direct
Mark N. Rogers	AMKR	Common Stock	Options Exercise	63.3%			16,112	41,554	20 Feb 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.