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  4. [Form 4] AMKOR TECHNOLOGY, INC. Insider Trading Activity

Amkor (AMKR) director gains extra RSUs through dividend equivalents

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amkor Technology director Daniel JL Liao received additional restricted stock units as part of his equity compensation. On June 23, 2026, he acquired 2.5166 restricted stock units and 9.4278 restricted stock units, each representing dividend equivalent units credited when Amkor paid a dividend.

These dividend equivalent units convert into additional restricted stock units tied to earlier RSU grants from May 15, 2025 and May 13, 2026, and are subject to the same vesting and other terms as those original awards. The transactions are compensation-related grants rather than open‑market stock purchases or sales.

Positive

  • None.

Negative

  • None.
Insider Liao Daniel JL
Role null
Type Security Shares Price Value
Grant/Award Restricted Stock Units 9.428 $0.00 --
Grant/Award Restricted Stock Units 2.517 $0.00 --
Holdings After Transaction: Restricted Stock Units — 9,902.485 shares (Direct, null)
Footnotes (1)
  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 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued. Represents DEUs accrued upon the payment of a dividend on June 23, 2026 with respect to RSUs of 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.
RSUs acquired (block 1) 2.5166 units Restricted stock units credited June 23, 2026
RSUs acquired (block 2) 9.4278 units Restricted stock units credited June 23, 2026
RSU balance after block 1 2615.5166 units Total RSUs following the 2.5166-unit credit
RSU balance after block 2 9902.4851 units Total RSUs following the 9.4278-unit credit
Grant price per RSU $0.0000 Compensation grant, no purchase price paid
Restricted Stock Units financial
"security_title: "Restricted Stock Units""
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 financial
"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend"
Dividend equivalent units are bookkeeping credits that mirror cash dividends paid on actual shares, granted to holders of stock-based awards such as restricted stock units or deferred compensation. They matter to investors because they increase a company’s reported employee compensation cost and can lead to issuance of more shares or cash payouts over time, similar to extra pay linked to ownership that affects shareholder dilution and corporate cash flow.
DEUs financial
"Represents 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."
RSUs financial
"Each DEU represents an additional RSU subject to the same provisions"
RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Liao Daniel JL
(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)
XDirector10% 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)
XForm 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)
CodeVAmount(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)06/23/2026A9.4278 (1) (1)Common Stock9.4278$09,902.4851D
Restricted Stock Units(2)06/23/2026A2.5166 (2) (2)Common Stock2.5166$02,615.5166D
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 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
2. Represents DEUs accrued upon the payment of a dividend on June 23, 2026 with respect to RSUs of 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 Daniel Liao06/25/2026
** Signature of Reporting PersonDate
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 did Amkor Technology (AMKR) director Daniel JL Liao report on this Form 4?

Daniel JL Liao reported receiving additional restricted stock units as compensation. On June 23, 2026, he was credited with small amounts of dividend equivalent units that convert into RSUs linked to earlier stock awards he already held.

How many restricted stock units did Daniel JL Liao acquire in the latest Amkor (AMKR) filing?

He acquired 2.5166 restricted stock units and 9.4278 restricted stock units. Both positions represent dividend equivalent units tied to previously granted RSUs, so they modestly increase his equity-based compensation rather than reflecting open-market trading activity.

What are dividend equivalent units (DEUs) in the Amkor Technology (AMKR) Form 4?

Dividend equivalent units are credits awarded when the company pays a dividend on existing RSUs. Each DEU in this filing represents one additional restricted stock unit, subject to the same vesting and other provisions as the original RSU grant held by the director.

Are the Form 4 transactions for Amkor (AMKR) open-market stock purchases or sales?

No, these transactions are compensation-related grants, not market trades. The director received additional RSUs as dividend equivalent units, so there was no open-market buying or selling of Amkor common stock reported in this particular Form 4 filing.

Which prior RSU grants at Amkor Technology (AMKR) generated the new dividend equivalent units?

The new dividend equivalent units arose from dividends paid on RSUs granted May 15, 2025 and May 13, 2026. Each DEU becomes an additional RSU that follows the same vesting schedule and terms as the corresponding original award to the director.