STOCK TITAN

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

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

Kevin Engel, Executive Vice President and director at Amkor Technology, Inc. (AMKR), reported transactions tied to the vesting of restricted stock units. On 09/30/2025 a grant-related event recorded 8,692 RSUs vested and withheld to satisfy tax obligations, and 3,725 shares were disposed at a price of $28.40 each. After these transactions the filing shows beneficial ownership related totals of 26,076 shares of common stock (derivative-related) and direct holdings reported as 15,046 and 11,321 on separate lines in Table I.

The filing explains the RSUs were originally granted on 02/20/2025 for 43,459 RSUs vesting in five equal quarterly installments through 06/30/2026, and that withheld shares were used to satisfy tax withholding with the Issuer paying the taxes on behalf of the reporting person.

Kevin Engel, vicepresidente esecutivo e direttore di Amkor Technology, Inc. (AMKR), ha riportato transazioni legate al vesting di unità azionarie vincolate. Il 30/09/2025 si è registrato un evento correlato al grant che ha vestito 8.692 RSU e trattenute per soddisfare obblighi fiscali, e 3.725 azioni sono state liquidate a un prezzo di $29.40 ciascuna. Dopo queste operazioni la dichiarazione mostra i totali di proprietà beneficiaria relativi a 26.076 azioni ordinarie (derivativi) e le partecipazioni dirette riportate come 15.046 e 11.321 in righe separate della Tabella I.

La dichiarazione spiega che le RSU sono state originariamente concesse il 20/02/2025 per 43.459 RSU che vestono in cinque rate trimestrali uguali entro il 30/06/2026, e che le azioni trattenute sono state utilizzate per soddisfare la ritenuta fiscale, con l'emittente che paga le tasse per conto della persona che ha presentato la relazione.

Kevin Engel, vicepresidente ejecutivo y director de Amkor Technology, Inc. (AMKR), informó sobre transacciones vinculadas al vesting de unidades de acciones restringidas. El 30/09/2025 un evento relacionado con la concesión registró 8.692 RSU que vestían y fueron retenidas para satisfacer obligaciones fiscales, y 3.725 acciones se vendieron a un precio de $28.40 cada una. Después de estas transacciones, la declaración muestra montos de propiedad beneficiosa relacionados con un total de 26.076 acciones ordinarias (relacionadas con derivados) y participaciones directas reportadas como 15.046 y 11.321 en líneas separadas de la Tabla I.

La declaración explica que las RSU fueron originalmente concedidas el 20/02/2025 por 43.459 RSU que vestían en cinco cuotas trimestrales iguales hasta 30/06/2026, y que las acciones retenidas se utilizaron para satisfacer la retención de impuestos, con el Emisor pagando los impuestos en nombre de la persona que reporta.

Kevin Engel, 임원 부사장 겸 이사회 이사인 Amkor Technology, Inc. (AMKR)는 유가 증권의 베스팅과 관련된 거래를 보고했습니다. 2025년 9월 30일 grant 관련 이벤트로 8,692 RSU가 vesting되고 세금 의무를 충족하기 위해 보유되었으며, 3,725 주가 $28.40에 매각되었습니다. 이 거래 후, 제출서는 이익 소유와 관련된 총액으로 일반 주식 26,076주(파생상품 관련)와 표 I의 별도 행에 15,04611,321의 직접 보유를 보고합니다.

해당 제출서는 RSU가 원래 2025년 2월 20일43,459 RSU로 부여되어 2026년 6월 30일까지 다섯 개의 동등한 분할로 vesting되도록 되어 있으며, 보유 주식은 세금 원천징수를 충당하기 위해 사용되었고 발행인이 보고인 대신 세금을 납부했다고 설명합니다.

Kevin Engel, vice-président exécutif et administrateur de Amkor Technology, Inc. (AMKR), a signalé des transactions liées à la prise de droits sur des unités d’actions restreintes. Le 30/09/2025, un événement lié à la subvention a enregistré que 8 692 RSU se sont vestées et ont été retenues pour satisfaire les obligations fiscales, et 3 725 actions ont été vendues à un prix de $28.40 chacune. Après ces transactions, la déclaration affiche des totaux de propriété bénéficiaire liés à 26 076 actions ordinaires (liées aux dérivés) et des participations directes reportées comme 15 046 et 11 321 sur des lignes séparées du tableau I.

La déclaration explique que les RSU ont été accordées à l'origine le 20/02/2025 pour 43 459 RSU qui vestent en cinq versements trimestriels égaux jusqu’au 30/06/2026, et que les actions retenues ont été utilisées pour satisfaire la retenue d’impôt, l’émetteur payant les impôts au nom de la personne qui fait le dépôt.

Kevin Engel, Executive Vice President und Director bei Amkor Technology, Inc. (AMKR), meldete Transaktionen im Zusammenhang mit dem Vesting von Restricted-Stock-Units. Am 30.09.2025 wurde ein grant-bezogenes Ereignis registriert, das 8.692 RSU vesteten und einbehalten wurden, um Steuerverpflichtungen zu erfüllen, und 3.725 Aktien zu einem Preis von $28.40 pro Stück veräußert wurden. Nach diesen Transaktionen zeigt die Einreichung Beneficial Ownership-bezogene Gesamtsummen von 26.076 Stammaktien (derivativebezogen) und direkte Anteile, die auf separaten Zeilen in Tabelle I als 15.046 und 11.321 angegeben sind.

Die Einreichung erläutert, dass die RSUs ursprünglich am 20.02.2025 für 43.459 RSUs gewährt wurden, die in fünf gleichen vierteljährlichen Teilraten bis zum 30.06.2026 vesten, und dass einbehaltene Aktien verwendet wurden, um die Quellensteuer zu decken, wobei der Emittent die Steuern im Namen der meldenden Person zahlt.

كيفن إنجل، نائب رئيس تنفيذي ومدير لدى Amkor Technology, Inc. (AMKR)، أبلغ عن معاملات مرتبطة بوقت استحقاق وحدات الأسهم المقيدة. في 30/09/2025 سجل حدث متعلق بالمنحة 8,692 RSU vestت وتُحتجز لتلبية الالتزامات الضريبية، و3,725 سهمًا تم التصرف بها بسعر $28.40 لكل سهم. بعد هذه المعاملات تُظهر الإيداع ملكية مستفيدة إجمالية مرتبطة بـ26,076 سهمًا من الأسهم العادية (مرتبطة بالمشتقات) وملكيات مباشرة مُبلَّغ عنها كـ15,046 و11,321 في سطور منفصلة في الجدول I.

وتشرح الإيداع أن RSU قد منحت أصلاً في 20/02/2025 لـ43,459 RSU vestت في خمس دفعات ربع سنوية متساوية حتى 30/06/2026، وأن الأسهم المحتجزة استُخدِمت لتلبية اقتطاع الضرائب، مع قيام المُصدِر بدفع الضرائب نيابة عن الشخص المبلّغ عنه.

Kevin Engel,Amkor Technology, Inc.(AMKR)执行副总裁兼董事,报告了与受限股票单位归属相关的交易。在2025/09/30,一项授予相关事件记录了8,692股RSU已归属并被扣留以满足税务义务,且3,725股以每股$28.40的价格被处置。在这些交易之后,申报显示受益所有权相关总额为26,076股普通股(衍生品相关),直接持股在表I的单独行上标注为15,04611,321

申报还解释,RSU最初在2025/02/20授予,共43,459RSU,按五个同等的季度分期 vesting,至2026/06/30止,扣留的股票用于满足税款预扣,由发行人代表报告人缴纳税款。

Positive
  • 8,692 RSUs vested on 09/30/2025, reflecting progress toward the 43,459 RSU grant
  • Issuer will pay taxes on behalf of the reporting person for the withheld shares, per the filing
Negative
  • 3,725 shares were disposed at $28.40, reducing the reporting person’s direct share count
  • Direct beneficial ownership lines show decreased holdings after withholding/disposition events

Insights

Routine equity compensation vesting recorded; shares withheld for taxes.

The filing documents the vesting of 8,692 RSUs on 09/30/2025 from a 02/20/2025 grant of 43,459 RSUs that vest in five quarterly installments through 06/30/2026. The company withheld 3,725 shares at a price of $28.40 to satisfy tax withholding, with the Issuer paying the associated taxes on behalf of the reporting person.

This is a standard compensation-related Form 4 disclosure showing a change in share counts but not indicating a voluntary open-market sale for other purposes.

Grant schedule and withholding details clarify insider economics.

The RSU grant of 43,459 shares vests in five equal quarters; the 8,692 vested portion on 09/30/2025 increases derivative-linked ownership to 26,076 shares (per Table II). The withholding of 3,725 shares at $28.40 reduced the reported direct share count on the same date.

Because the Issuer pays the taxes on the reporting person’s behalf, the transaction reflects common payroll tax withholding mechanics tied to equity awards.

Kevin Engel, vicepresidente esecutivo e direttore di Amkor Technology, Inc. (AMKR), ha riportato transazioni legate al vesting di unità azionarie vincolate. Il 30/09/2025 si è registrato un evento correlato al grant che ha vestito 8.692 RSU e trattenute per soddisfare obblighi fiscali, e 3.725 azioni sono state liquidate a un prezzo di $29.40 ciascuna. Dopo queste operazioni la dichiarazione mostra i totali di proprietà beneficiaria relativi a 26.076 azioni ordinarie (derivativi) e le partecipazioni dirette riportate come 15.046 e 11.321 in righe separate della Tabella I.

La dichiarazione spiega che le RSU sono state originariamente concesse il 20/02/2025 per 43.459 RSU che vestono in cinque rate trimestrali uguali entro il 30/06/2026, e che le azioni trattenute sono state utilizzate per soddisfare la ritenuta fiscale, con l'emittente che paga le tasse per conto della persona che ha presentato la relazione.

Kevin Engel, vicepresidente ejecutivo y director de Amkor Technology, Inc. (AMKR), informó sobre transacciones vinculadas al vesting de unidades de acciones restringidas. El 30/09/2025 un evento relacionado con la concesión registró 8.692 RSU que vestían y fueron retenidas para satisfacer obligaciones fiscales, y 3.725 acciones se vendieron a un precio de $28.40 cada una. Después de estas transacciones, la declaración muestra montos de propiedad beneficiosa relacionados con un total de 26.076 acciones ordinarias (relacionadas con derivados) y participaciones directas reportadas como 15.046 y 11.321 en líneas separadas de la Tabla I.

La declaración explica que las RSU fueron originalmente concedidas el 20/02/2025 por 43.459 RSU que vestían en cinco cuotas trimestrales iguales hasta 30/06/2026, y que las acciones retenidas se utilizaron para satisfacer la retención de impuestos, con el Emisor pagando los impuestos en nombre de la persona que reporta.

Kevin Engel, 임원 부사장 겸 이사회 이사인 Amkor Technology, Inc. (AMKR)는 유가 증권의 베스팅과 관련된 거래를 보고했습니다. 2025년 9월 30일 grant 관련 이벤트로 8,692 RSU가 vesting되고 세금 의무를 충족하기 위해 보유되었으며, 3,725 주가 $28.40에 매각되었습니다. 이 거래 후, 제출서는 이익 소유와 관련된 총액으로 일반 주식 26,076주(파생상품 관련)와 표 I의 별도 행에 15,04611,321의 직접 보유를 보고합니다.

해당 제출서는 RSU가 원래 2025년 2월 20일43,459 RSU로 부여되어 2026년 6월 30일까지 다섯 개의 동등한 분할로 vesting되도록 되어 있으며, 보유 주식은 세금 원천징수를 충당하기 위해 사용되었고 발행인이 보고인 대신 세금을 납부했다고 설명합니다.

Kevin Engel, vice-président exécutif et administrateur de Amkor Technology, Inc. (AMKR), a signalé des transactions liées à la prise de droits sur des unités d’actions restreintes. Le 30/09/2025, un événement lié à la subvention a enregistré que 8 692 RSU se sont vestées et ont été retenues pour satisfaire les obligations fiscales, et 3 725 actions ont été vendues à un prix de $28.40 chacune. Après ces transactions, la déclaration affiche des totaux de propriété bénéficiaire liés à 26 076 actions ordinaires (liées aux dérivés) et des participations directes reportées comme 15 046 et 11 321 sur des lignes séparées du tableau I.

La déclaration explique que les RSU ont été accordées à l'origine le 20/02/2025 pour 43 459 RSU qui vestent en cinq versements trimestriels égaux jusqu’au 30/06/2026, et que les actions retenues ont été utilisées pour satisfaire la retenue d’impôt, l’émetteur payant les impôts au nom de la personne qui fait le dépôt.

Kevin Engel, Executive Vice President und Director bei Amkor Technology, Inc. (AMKR), meldete Transaktionen im Zusammenhang mit dem Vesting von Restricted-Stock-Units. Am 30.09.2025 wurde ein grant-bezogenes Ereignis registriert, das 8.692 RSU vesteten und einbehalten wurden, um Steuerverpflichtungen zu erfüllen, und 3.725 Aktien zu einem Preis von $28.40 pro Stück veräußert wurden. Nach diesen Transaktionen zeigt die Einreichung Beneficial Ownership-bezogene Gesamtsummen von 26.076 Stammaktien (derivativebezogen) und direkte Anteile, die auf separaten Zeilen in Tabelle I als 15.046 und 11.321 angegeben sind.

Die Einreichung erläutert, dass die RSUs ursprünglich am 20.02.2025 für 43.459 RSUs gewährt wurden, die in fünf gleichen vierteljährlichen Teilraten bis zum 30.06.2026 vesten, und dass einbehaltene Aktien verwendet wurden, um die Quellensteuer zu decken, wobei der Emittent die Steuern im Namen der meldenden Person zahlt.

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).
1. Name and Address of Reporting Person*
Engel Kevin

(Last) (First) (Middle)
2045 EAST INNOVATION CIRCLE

(Street)
TEMPE AZ 85284

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
AMKOR TECHNOLOGY, INC. [ AMKR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Executive Vice President
3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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
Common Stock 09/30/2025 M 8,692 A $0 15,046 D
Common Stock 09/30/2025 F(1) 3,725 D $28.4 11,321 D
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 $0 09/30/2025 M 8,692 (2) (2) Common Stock 8,692 $0 26,076 D
Explanation of Responses:
1. The transaction represents shares withheld by Amkor Technology, Inc. (the "Issuer") in connection with the vesting of certain restricted stock units ("RSUs") granted to the Reporting Person on February 20, 2025 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.
2. On the Grant Date, the Reporting Person was granted 43,459 RSUs which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026.
Remarks:
/s/ Mark N. Rogers, Attorney-in-Fact for Kevin Engel 10/02/2025
** 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.

FAQ

What did Kevin Engel file on Form 4 for AMKR?

The filing reports vesting of 8,692 RSUs on 09/30/2025, withholding/disposition of 3,725 shares at $28.40, and resulting beneficial ownership figures.

How many RSUs were originally granted to Kevin Engel?

The filing states a grant of 43,459 RSUs awarded on 02/20/2025 that vest in five equal quarterly installments.

Why were shares withheld in the transaction?

The filing explains the shares were withheld to satisfy the reporting person's tax withholding obligations and the Issuer will pay those taxes on the reporting person's behalf.

What are the post-transaction beneficial ownership totals reported?

Table II reports 26,076 common shares equivalent from RSUs; Table I shows direct holdings of 15,046 and 11,321 on separate lines following the transactions.

On what schedule do the RSUs fully vest?

The RSUs vest in five equal quarterly installments on 06/30/2025, 09/30/2025, 12/31/2025, 03/31/2026, and 06/30/2026, reaching 100% vesting on 06/30/2026.
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