Cherie Buntyn - 12 Mar 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Chief Accounting Officer
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for Cherie Buntyn
Issuer symbol: AMKR
Transactions as of: 12 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Mar 2026, 18:37:52 UTC
Previous filing: 16 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Buntyn Cherie	Chief Accounting Officer	2045 E INNOVATION CIRCLE, TEMPE	/s/ Mark N. Rogers, Attorney-in-Fact for Cherie Buntyn	16 Mar 2026	0001936124

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	Award		+799		$0.000000^*	799	12 Mar 2026	Common Stock	799	$0.000000	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents shares of Amkor Technology, Inc. (the "Issuer") common stock underlying time-vested restricted stock units (the "RSUs") granted on March 12, 2026 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan. 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.

Content

Represents shares of Amkor Technology, Inc. (the "Issuer") common stock underlying time-vested restricted stock units (the "RSUs") granted on March 12, 2026 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan. 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.