Amkor director receives 2,613 restricted stock units

AMKOR TECHNOLOGY, INC. reported that director Douglas A. Alexander received a grant of 2,613 restricted stock units (RSUs) on May 13, 2026 under the company’s 2021 Equity Incentive Plan.

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. reported that director Douglas A. Alexander received a grant of 2,613 restricted stock units (RSUs) on May 13, 2026 under the company’s 2021 Equity Incentive Plan. Each RSU converts into one share of common stock if it vests.

The RSUs will vest in full on the earlier of the first anniversary of the grant date or the company’s first annual meeting of stockholders following that date. The award was granted for no cash consideration, as compensation for Alexander’s service as a director, and leaves him with 2,613 RSUs outstanding after this transaction.

Insider Trade Summary

Grant/Award: 2,613 shares

Grant/Award 1 txn

Insider ALEXANDER DOUGLAS A

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	2,613	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 2,613 contracts (Direct)

Footnotes (1)

1. F1. Represents shares of common stock underlying time-vested restricted stock units ("RSUs") granted on May 13, 2026 (the "Grant Date") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan. Subject to the terms and conditions of the applicable award agreement, the RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Key Figures

RSUs granted: 2,613 RSUs RSUs outstanding after grant: 2,613 RSUs Conversion ratio: 1 RSU = 1 share +2 more

5 metrics

RSUs granted 2,613 RSUs Grant to director on May 13, 2026

RSUs outstanding after grant 2,613 RSUs Total RSUs held after this transaction

Conversion ratio 1 RSU = 1 share RSUs convertible into common stock on one-for-one basis

Vesting schedule Earlier of 1 year or next annual meeting Full vesting timing from May 13, 2026 grant date

Consideration paid No cash consideration Award for service as a director

Key Terms

Restricted Stock Units, 2021 Equity Incentive Plan, vest in full, one-for-one basis, +1 more

5 terms

Restricted Stock Units financial

"Represents shares of common stock underlying time-vested restricted stock units ("RSUs")"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2021 Equity Incentive Plan financial

"pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan"

vest in full financial

"and will vest in full on the earlier of the first anniversary of the Grant Date"

one-for-one basis financial

"the RSUs may be converted into common stock of the Issuer on a one-for-one basis"

annual meeting of stockholders financial

"or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Amkor (AMKR) director Douglas A. Alexander receive in this Form 4?

Douglas A. Alexander received a grant of 2,613 restricted stock units (RSUs). These RSUs were awarded under Amkor Technology, Inc.’s 2021 Equity Incentive Plan as part of his compensation for serving as a director, with no cash payment required from him.

When do the 2,613 RSUs granted to the Amkor (AMKR) director vest?

The 2,613 RSUs will vest in full on the earlier of the first anniversary of the May 13, 2026 grant date or the date of Amkor’s first annual stockholders’ meeting that follows this grant date, assuming applicable award conditions are satisfied.

How many Amkor (AMKR) shares can the granted RSUs become for the director?

The 2,613 RSUs may convert into 2,613 shares of common stock. Each RSU converts into one share of Amkor Technology, Inc. common stock if the vesting conditions are met, providing equity-based compensation tied directly to the company’s stock.

Did the Amkor (AMKR) director pay cash for the 2,613 RSUs reported?

No cash changed hands for this grant; the RSUs were awarded for no consideration other than the director’s service. This is a typical structure for non-cash equity compensation, aligning the director’s interests with shareholders without an upfront purchase.

What plan governs the 2,613 RSUs granted to the Amkor (AMKR) director?

The grant was made under the Amkor Technology, Inc. 2021 Equity Incentive Plan. This plan authorizes equity awards like RSUs to directors and other participants, subject to specific terms, conditions, and vesting schedules set in individual award agreements.

How many RSUs does the Amkor (AMKR) director hold after this transaction?

Following this grant, the director is shown as holding 2,613 RSUs. These units represent a right to receive the same number of Amkor common shares in the future, if the vesting conditions described in the award and plan documents are fully satisfied.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 04:42 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ALEXANDER DOUGLAS A

(Last) (First) (Middle)

2045 EAST INNOVATION CIRCLE

(Street)

TEMPE ARIZONA 85284

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AMKOR TECHNOLOGY, INC. [ AMKR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	05/13/2026		A		2,613		(1)	(1)	Common Stock	2,613	$0	2,613	D

Explanation of Responses:

1. Represents shares of common stock underlying time-vested restricted stock units ("RSUs") granted on May 13, 2026 (the "Grant Date") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan. Subject to the terms and conditions of the applicable award agreement, the RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for Douglas A. Alexander	05/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)