Farshad Haghighi - 14 Nov 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Executive Vice President
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for Farshad Haghighi
Issuer symbol: AMKR
Transactions as of: 14 Nov 2025
Net transactions value: -$25,249
Form type: 4
Filing time: 18 Nov 2025, 16:35:40 UTC
Previous filing: 10 Sep 2025
Next filing: 18 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Haghighi Farshad	Executive Vice President	2045 EAST INNOVATION CIRCLE, TEMPE	/s/ Mark N. Rogers, Attorney-in-Fact for Farshad Haghighi	18 Nov 2025	0001887579

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMKR	Common Stock	Options Exercise	$0	+66	+0.79%	$0.000000	8,420	14 Nov 2025	Direct
transaction	AMKR	Common Stock	Tax liability	$2,091	-66	-0.78%	$31.68	8,354	14 Nov 2025	Direct	F1
transaction	AMKR	Common Stock	Options Exercise	$0	+67	+0.8%	$0.000000	8,421	14 Nov 2025	Direct	F1
transaction	AMKR	Common Stock	Tax liability	$2,123	-67	-0.8%	$31.68	8,354	14 Nov 2025	Direct	F2
transaction	AMKR	Common Stock	Options Exercise	$0	+269	+3.2%	$0.000000	8,623	14 Nov 2025	Direct	F2
transaction	AMKR	Common Stock	Tax liability	$8,522	-269	-3.1%	$31.68	8,354	14 Nov 2025	Direct	F3
transaction	AMKR	Common Stock	Options Exercise	$0	+395	+4.7%	$0.000000	8,749	14 Nov 2025	Direct	F3
transaction	AMKR	Common Stock	Tax liability	$12,514	-395	-4.5%	$31.68	8,354	14 Nov 2025	Direct	F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMKR	Restricted Stock Units	Options Exercise	$0	-66	-3.5%	$0.000000	1,814	14 Nov 2025	Common Stock	66	$0.000000	Direct	F1
transaction	AMKR	Restricted Stock Units	Options Exercise	$0	-67	-1.8%	$0.000000	3,644	14 Nov 2025	Common Stock	67	$0.000000	Direct	F2
transaction	AMKR	Restricted Stock Units	Options Exercise	$0	-269	-1.8%	$0.000000	14,577	14 Nov 2025	Common Stock	269	$0.000000	Direct	F3
transaction	AMKR	Restricted Stock Units	Options Exercise	$0	-395	-1.2%	$0.000000	32,199	14 Nov 2025	Common Stock	395	$0.000000	Direct	F4

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

Explanation of Responses:

Id	Content
F1	The reported transaction involved the withholding of 66 shares of common stock of Amkor Technology, Inc. (the "Issuer") issuable upon the early vesting of an equal number of restricted stock units ("RSUs") to pay taxes associated with the Reporting Person's retirement eligibility status.
F2	The reported transaction involved the withholding of 67 shares of the Issuer's common stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.
F3	The reported transaction involved the withholding of 269 shares of the Issuer's common stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.
F4	The reported transaction involved the withholding of 395 shares of the Issuer's common stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.