Form 4 for AMKR AMKOR TECHNOLOGY, INC.

Accepted 2026-06-12 16:36:07 ET · period of report 2026-06-12 · accession 0001628280-26-042891 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
	2026-06-12 16:36	2026-06-12	AMKR	KIM SUSAN Y	Dir, 10%, Member of 10% owner group (5)	A - Grant	$0.00	+9,893	6.12M	+0.2%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-06-12	A	A	9,893	$0.00	6,120,387	D	—	—	(F1) On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. On May 13, 2026, the RSUs, plus an additional 104 dividend equivalent units ("DEUs"), which each represented an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, vested. On June 12, 2026, the RSUs and DEUs converted into common stock of the Issuer on a one-for-one basis. (F1) On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. On May 13, 2026, the RSUs, plus an additional 104 dividend equivalent units ("DEUs"), which each represented an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, vested. On June 12, 2026, the RSUs and DEUs converted into common stock of the Issuer on a one-for-one basis.