How is the June 23, 2026 dividend related to David N. Watson’s new RSUs at AMKOR?

The June 23, 2026 dividend triggered the accrual of 2.5166 dividend equivalent units for David N. Watson. Each DEU represents an additional restricted stock unit that follows the same vesting and other provisions as the original time-vested RSUs granted on May 13, 2026.

Amkor (NASDAQ: AMKR) director receives dividend equivalent restricted stock units

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. director David N. Watson reported an acquisition of additional equity-based compensation tied to existing awards. On June 23, 2026, he received 2.5166 dividend equivalent units, which are additional restricted stock units linked to a dividend paid on that date.

These dividend equivalent units correspond to previously granted time-vested restricted stock units awarded on May 13, 2026 and convert into the same number of common shares when vested. After this grant, Watson holds a total of 2,615.5166 restricted stock units directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider WATSON DAVID N

Role null

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	2.517	$0.00	--

Holdings After Transaction: Restricted Stock Units — 2,615.517 shares (Direct, null)

Footnotes (1)

[object Object]

Key Figures

Dividend equivalent RSUs granted: 2.5166 units Total RSUs after transaction: 2,615.5166 units Grant date of underlying RSUs: May 13, 2026

3 metrics

Dividend equivalent RSUs granted 2.5166 units Dividend equivalent units accrued June 23, 2026

Total RSUs after transaction 2,615.5166 units Restricted stock units held by David N. Watson after grant

Grant date of underlying RSUs May 13, 2026 Original time-vested RSU award reference date

Key Terms

Restricted Stock Units, dividend equivalent units ("DEUs"), time-vested restricted stock units, Common Stock

4 terms

Restricted Stock Units financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend...with respect to 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.

dividend equivalent units ("DEUs") financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026..."

time-vested restricted stock units financial

"...with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc."

Common Stock financial

"underlying_security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/25/2026 - 04:49 PM Accepted by SEC EDGAR 06/25/2026 - 04:48 PM

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^*

WATSON DAVID N

(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)
06/23/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾	06/23/2026		A		2.5166		⁽¹⁾	⁽¹⁾	Common Stock	2.5166	$0	2,615.5166	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for David N. Watson	06/25/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did AMKOR (AMKR) director David N. Watson report?

David N. Watson reported receiving 2.5166 dividend equivalent restricted stock units on June 23, 2026. These units were credited as additional equity compensation tied to an earlier time-vested RSU grant from May 13, 2026 and increase his total RSU holdings.

How many restricted stock units does David N. Watson hold after this AMKR Form 4?

After this transaction, David N. Watson holds 2,615.5166 restricted stock units. This total includes the newly credited 2.5166 dividend equivalent units, which mirror the terms of his previously granted time-vested restricted stock units in Amkor Technology, Inc.

What are dividend equivalent units (DEUs) in the AMKOR (AMKR) Form 4 filing?

Dividend equivalent units represent additional restricted stock units credited when a dividend is paid. In this case, 2.5166 DEUs were accrued on June 23, 2026, matching the terms of existing time-vested RSUs previously granted to director David N. Watson on May 13, 2026.

Does the AMKOR (AMKR) Form 4 show an open-market stock purchase or sale?

The Form 4 shows a grant-type acquisition of 2.5166 dividend equivalent restricted stock units, not an open-market trade. These units were automatically credited as part of Amkor’s equity compensation arrangements when a dividend was paid, rather than bought or sold in the market.