Form 4 for AMKR AMKOR TECHNOLOGY, INC.

Accepted 2026-02-20 00:00:00 ET · period of report 2026-02-18 · accession 0001628280-26-010230 · 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
DM	2026-02-20	2026-02-18	AMKR	Haghighi Farshad	EVP	F - Tax	$46.74	-3,659	13.3K	-22%	-$171.0K
DM	2026-02-20	2026-02-18	AMKR	Haghighi Farshad	EVP	A - Grant	$0.00	+7,597	11.3K	+204%	$0
D	2026-02-20	2026-02-18	AMKR	Haghighi Farshad	EVP	A - Grant	$0.00	+18.2K	18.2K	New	$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	2026-02-18	F	D	1,038	$46.74	10,292	D	—	—
2	Common	Common Stock	2026-02-18	F	D	2,621	$46.74	13,265	D	—	—
3	Common	Common Stock	2026-02-18	A	A	5,594	$0.00	15,886	D	—	—
4	Common	Common Stock	2026-02-18	A	A	2,003	$0.00	11,330	D	—	—
5	Derivative	Restricted Stock Units	2026-02-18	A	A	18,185	$0.00	18,185	D	$0.00 · — to —	18,185 Common Stock	(F4) Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 18, 2026 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date.