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

Dividend-equivalent RSUs granted to AMKOR (AMKR) director Douglas A. Alexander

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

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. director Douglas A. Alexander reported compensation-related equity changes rather than open-market trading. On June 23, 2026 he acquired small numbers of Restricted Stock Units as dividend equivalent units tied to previously granted time-vested RSUs. These include 2.5166 RSUs linked to a May 17, 2022 grant and 9.4278 RSUs linked to a May 16, 2023 grant, with each dividend equivalent unit converting into an additional RSU under the same terms as the original awards.

Positive

  • None.

Negative

  • None.
Insider ALEXANDER DOUGLAS A
Role null
Type Security Shares Price Value
Grant/Award Restricted Stock Units 8.385 $0.00 --
Grant/Award Restricted Stock Units 8.165 $0.00 --
Grant/Award Restricted Stock Units 9.428 $0.00 --
Grant/Award Restricted Stock Units 2.517 $0.00 --
Holdings After Transaction: Restricted Stock Units — 9,246.816 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 17, 2022. 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 16, 2023. 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 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.
RSU DEUs granted (2022 award) 2.5166 units Dividend equivalent units on RSUs granted May 17, 2022; dividend date June 23, 2026
RSU DEUs granted (2023 award) 9.4278 units Dividend equivalent units on RSUs granted May 16, 2023; dividend date June 23, 2026
RSU DEUs granted (2025 award) 8.1651 units Dividend equivalent units on RSUs granted May 15, 2025; dividend date June 23, 2026
RSU DEUs granted (2026 award) 8.3848 units Dividend equivalent units on RSUs granted May 13, 2026; dividend date June 23, 2026
Restricted Stock Units financial
"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")"
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."
RSUs financial
"Each DEU represents an additional RSU subject to the same provisions as the RSU"
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*
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)
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)06/23/2026A8.3848 (1) (1)Common Stock8.3848$09,246.8164D
Restricted Stock Units(2)06/23/2026A8.1651 (2) (2)Common Stock8.1651$08,903.9532D
Restricted Stock Units(3)06/23/2026A9.4278 (3) (3)Common Stock9.4278$09,902.4851D
Restricted Stock Units(4)06/23/2026A2.5166 (4) (4)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 17, 2022. 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 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
3. 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 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
4. 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 Douglas A. Alexander06/25/2026
** 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 insider activity did AMKOR (AMKR) director Douglas A. Alexander report on June 23, 2026?

Douglas A. Alexander reported automatic equity compensation changes, not open-market trades. He received small blocks of dividend equivalent Restricted Stock Units that accrued on June 23, 2026, tied to prior time-vested RSU grants from 2022, 2023, 2025, and 2026.

Were the AMKOR (AMKR) transactions by Douglas A. Alexander open-market buys or sells?

The transactions were not open-market buys or sells. They are coded "A" as grant or award acquisitions, reflecting dividend equivalent units that automatically convert into additional RSUs under existing award terms, rather than discretionary purchases or sales in the market.

What are dividend equivalent units (DEUs) in the AMKOR (AMKR) Form 4 for Douglas A. Alexander?

Dividend equivalent units are credits that mirror dividends on existing RSUs. For Alexander, each DEU granted on June 23, 2026 corresponds to one additional Restricted Stock Unit, subject to the same vesting and other provisions as the original RSU awards that earned the dividend.

Which prior RSU grants generated the June 23, 2026 DEUs for AMKOR (AMKR) director Douglas A. Alexander?

The June 23, 2026 dividend equivalent units relate to RSUs granted on May 17, 2022, May 16, 2023, May 15, 2025, and May 13, 2026. Each DEU accrual is tied to one of these prior grants and follows that grant’s existing vesting conditions.

How many Restricted Stock Units did Douglas A. Alexander receive in one of the AMKOR (AMKR) dividend accrual transactions?

In one example transaction, Alexander was credited with 2.5166 Restricted Stock Units. This amount reflects dividend equivalent units on RSUs granted May 17, 2022, converting into additional RSUs under the same terms as that original award after the June 23, 2026 dividend.

What transaction code is used for Douglas A. Alexander’s AMKOR (AMKR) Form 4 entries and what does it mean?

Each entry uses transaction code "A", meaning grant, award, or other acquisition. Here it denotes automatic acquisition of Restricted Stock Units as dividend equivalent units on existing RSU awards, not negotiated purchases or sales of AMKOR common stock in the open market.