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

Dividend-based RSU units granted to Amkor (AMKR) board director

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

Rhea-AI Filing Summary

Morse Robert Randolph reported acquisition or exercise transactions in this Form 4 filing.

AMKOR TECHNOLOGY, INC. director Robert Randolph Morse reported awards of additional restricted stock units on June 23, 2026. These awards are dividend equivalent units that accrued when the company paid a dividend on existing time-vested RSU grants from 2023, 2025, and 2026. Each dividend equivalent unit is treated as an extra RSU under the same vesting and other terms as the original grants, so this filing reflects routine equity-based compensation rather than any open-market buying or selling of AMKR shares.

Positive

  • None.

Negative

  • None.
Insider Morse Robert Randolph
Role null
Type Security Shares Price Value
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 — 8,903.953 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 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.
DEUs from 2023 RSU grant 2.5166 units Dividend equivalent RSUs on June 23, 2026 for May 16, 2023 grant
DEUs from 2025 RSU grant 9.4278 units Dividend equivalent RSUs on June 23, 2026 for May 15, 2025 grant
DEUs from 2026 RSU grant 8.1651 units Dividend equivalent RSUs on June 23, 2026 for May 13, 2026 grant
RSUs after one DEU accrual line 2615.5166 units Total RSUs following the 2.5166-unit DEU transaction
RSUs after another DEU accrual line 9902.4851 units Total RSUs following the 9.4278-unit DEU transaction
RSUs after third DEU accrual line 8903.9532 units Total RSUs following the 8.1651-unit DEU transaction
Dividend equivalent units financial
"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026..."
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.
Restricted stock units financial
"Represents dividend equivalent units ("DEUs") accrued ... 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.
time-vested restricted stock units financial
"with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc."
Grant, award, or other acquisition financial
"transaction_code_description": "Grant, award, or other acquisition""
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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*
Morse Robert Randolph
(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)06/23/2026A8.1651 (1) (1)Common Stock8.1651$08,903.9532D
Restricted Stock Units(2)06/23/2026A9.4278 (2) (2)Common Stock9.4278$09,902.4851D
Restricted Stock Units(3)06/23/2026A2.5166 (3) (3)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 16, 2023. 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 15, 2025. 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 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 Robert R. Morse06/25/2026
** 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 Technology (AMKR) report for Robert Randolph Morse?

Amkor Technology director Robert Randolph Morse reported receiving additional restricted stock units as dividend equivalent units on June 23, 2026. These units were added to existing RSU grants and represent routine equity compensation, not open-market stock purchases or sales.

How many dividend equivalent restricted stock units did the Amkor (AMKR) director receive?

The director received 2.5166, 9.4278, and 8.1651 dividend equivalent restricted stock units tied to three separate RSU grants. Each amount corresponds to dividends paid on earlier RSU awards and increases his unvested equity position slightly under the same grant terms.

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

Dividend equivalent units are additional restricted stock units credited when a cash dividend is paid on underlying shares. For Amkor, each DEU equals one extra RSU and is subject to the same vesting and other provisions as the original RSU grant mentioned in the Form 4.

Which prior RSU grants generated the new DEUs for the Amkor (AMKR) director?

The new dividend equivalent units relate to RSUs granted on May 16, 2023, May 15, 2025, and May 13, 2026. When Amkor paid a dividend on June 23, 2026, these grants accrued additional RSUs, matching the original awards’ vesting and other conditions.

Does the Amkor (AMKR) Form 4 show any stock sales or open-market purchases?

The Form 4 does not show any stock sales or open-market purchases. It only reports awards of dividend equivalent restricted stock units, classified as grant or award acquisitions, which increase the director’s equity-based compensation without changing public share float through trading.