Form 4 for AMKR AMKOR TECHNOLOGY, INC.

Accepted 2026-07-20 16:38:00 ET · period of report 2026-07-16 · accession 0001628280-26-048825 · 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
DT	2026-07-20 16:38	2026-07-16	AMKR	ROGERS MARK N	EVP, GC	M - OptEx	$7.40	+5,000	43.9K	+13%	+$37.0K
DT	2026-07-20 16:38	2026-07-16	AMKR	ROGERS MARK N	EVP, GC	S - Sale+OE	$65.12	-5,000	38.9K	-11%	-$325.6K
DT	2026-07-20 16:38	2026-07-16	AMKR	ROGERS MARK N	EVP, GC	M - OptEx	$0.00	-5,000	75.0K	-6%	$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	2026-07-16	M	A	5,000	$7.40	43,904	D	—	—
2	Common	Common Stock	2026-07-16	S	D	5,000	$65.12	38,904	D	—	—	(F1) The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 1, 2025.
3	Derivative	Employee Stock Option (Right-to-Buy)	2026-07-16	M	D	5,000	$0.00	75,000	D	$7.40 · 2020-06-10 to 2029-06-10	5,000 Common Stock	(F2) This stock option (the "Option") to acquire 200,000 shares of Amkor Technology, Inc. common stock (the "Option Shares") was granted on June 10, 2019 (the "Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Option Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option vested on the fourth anniversary of the Option Grant Date.