TapewireFind a company

person · Reporting owner

KIM JAMES J

Disclosed activity across 1 company

Tapewire entity
29209
SEC CIK
0001158839

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
AMKOR TECHNOLOGY, INC.AMKR · Entity 348110% owner · Member of 10% owner group (5)July 20, 2026July 22, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

AMKOR TECHNOLOGY, INC.

Report date July 20, 2026 · Filed July 22, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect511,645 Ending reported balance After 2026-07-20 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-07-20 · Exercise / conversion · Acquired 200,000 · Balance 261,645

Row 2 · 2026-07-20 · Exercise / conversion · Acquired 250,000 · Balance 511,645

Employee Stock Option (Right-to-Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $9.86 · Expires 2026-10-31Direct0 Reported balance After 2026-07-20 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2026-07-20 · Exercise / conversion · Disposed 200,000 · Balance 0

F3: This stock option (the "2017 Option") to acquire 200,000 shares of the Issuer's Common Stock (the "2017 Option Shares") was granted on February 27, 2017 (the "2017 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2017 Option Shares, on the first anniversary of the 2017 Option Grant Date; and (ii) with respect to the remainder of the 2017 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2017 Option vested on the fourth anniversary of the 2017 Option Grant Date.

Employee Stock Option (Right-to-Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $9.48 · Expires 2026-10-31Direct0 Reported balance After 2026-07-20 transaction · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · 2026-07-20 · Exercise / conversion · Disposed 250,000 · Balance 0

F4: This stock option (the "2019 Option") to acquire 250,000 shares of the Issuer's Common Stock (the "2019 Option Shares") was granted on February 15, 2019 (the "2019 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date.

Common StockSEC Table I · non-derivativeIndirectSusan Y. Kim 2023 Family Distribution Trust725,000 Reported balance Holding disclosure · report date 2026-07-20 · row 3 Holding and transaction disclosures are not merged.
1 source row

Row 3 · Balance 725,000

F1: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 10,511,032 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") and (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F2: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Common StockSEC Table I · non-derivativeIndirectBy John T. Kim Family Trust U/A dtd. 12/11/127,828,682 Reported balance Holding disclosure · report date 2026-07-20 · row 4 Holding and transaction disclosures are not merged.
1 source row

Row 4 · Balance 7,828,682

F1: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 10,511,032 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") and (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F2: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Common StockSEC Table I · non-derivativeIndirectBy John T. Kim G-S Trust dtd. 12/11/121,957,350 Reported balance Holding disclosure · report date 2026-07-20 · row 5 Holding and transaction disclosures are not merged.
1 source row

Row 5 · Balance 1,957,350

F1: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 10,511,032 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") and (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F2: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Common StockSEC Table I · non-derivativeIndirectBy self as Trustee of Trust U/A dtd. 12/11/12164,678 Reported balance Holding disclosure · report date 2026-07-20 · row 6 Holding and transaction disclosures are not merged.
1 source row

Row 6 · Balance 164,678

F1: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 10,511,032 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") and (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F2: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Filing footnotes · ownership attribution and instrument terms

F1: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 10,511,032 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") and (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F2: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

F3: This stock option (the "2017 Option") to acquire 200,000 shares of the Issuer's Common Stock (the "2017 Option Shares") was granted on February 27, 2017 (the "2017 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2017 Option Shares, on the first anniversary of the 2017 Option Grant Date; and (ii) with respect to the remainder of the 2017 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2017 Option vested on the fourth anniversary of the 2017 Option Grant Date.

F4: This stock option (the "2019 Option") to acquire 250,000 shares of the Issuer's Common Stock (the "2019 Option Shares") was granted on February 15, 2019 (the "2019 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date.

Transaction history

JSON API
Reset

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
July 20, 2026 Filed Jul 22, 2026 20:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionEmployee Stock Option (Right-to-Buy) · Derivative 250,000 $0.00 Strike: $9.48 $0.00
Disclosure

SEC source: 0001158839-26-000001 · wk-form4_1784752346.xml · derivative · entry 8

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 250,000 shares

Expires 2026-10-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: This stock option (the "2019 Option") to acquire 250,000 shares of the Issuer's Common Stock (the "2019 Option Shares") was granted on February 15, 2019 (the "2019 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date.

Read SEC document
July 20, 2026 Filed Jul 22, 2026 20:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionEmployee Stock Option (Right-to-Buy) · Derivative 200,000 $0.00 Strike: $9.86 $0.00
Disclosure

SEC source: 0001158839-26-000001 · wk-form4_1784752346.xml · derivative · entry 7

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 200,000 shares

Expires 2026-10-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: This stock option (the "2017 Option") to acquire 200,000 shares of the Issuer's Common Stock (the "2017 Option Shares") was granted on February 27, 2017 (the "2017 Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the 2017 Option Shares, on the first anniversary of the 2017 Option Grant Date; and (ii) with respect to the remainder of the 2017 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2017 Option vested on the fourth anniversary of the 2017 Option Grant Date.

Read SEC document
July 20, 2026 Filed Jul 22, 2026 20:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 250,000 $9.48 $2,370,000.00
Disclosure

SEC source: 0001158839-26-000001 · wk-form4_1784752346.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 511,645

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
July 20, 2026 Filed Jul 22, 2026 20:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 200,000 $9.86 $1,972,000.00
Disclosure

SEC source: 0001158839-26-000001 · wk-form4_1784752346.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 261,645

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
December 26, 2025 Filed Dec 30, 2025 21:40 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 725,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000017 · wk-form4_1767130813.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Indirect · Susan Y. Kim 2023 Family Distribution Trust

Disclosed balance after: 725,000

F1 · shares: On December 26, 2025, the 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 725,000 shares of common stock of Amkor, Inc. (the "Issuer") to the Susan Y. Kim 2023 Family Distribution Trust. Susan Y. Kim is the trustee of the 2023 Grantor Retained Annuity Trust Dated 9/15/2023. The Reporting Person and John T. Kim are co-trustees of the Susan Y. Kim 2023 Family Distribution Trust.

F2 · ownership.direct: The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 9,786,032 shares of the Issuer's Common Stock (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

F3 · ownership.direct: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Read SEC document
December 19, 2025 Filed Dec 24, 2025 00:01 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 2,538,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000015 · wk-form4_1766534487.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (6)

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 0

F3 · balance_after: On December 19, 2025, the spouse of the Reporting Person, Agnes C. Kim, made a distribution of 2,538,000 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim.

Read SEC document
December 19, 2025 Filed Dec 24, 2025 00:01 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 3,244,594 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000015 · wk-form4_1766534487.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (6)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,645

F1 · shares: On November 24, 2025, the Reporting Person reported that the 2024 Grantor Retained Annuity Trust of John J. Kim 8/5/2024 distributed 965,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the James J. Kim Revocable Trust dtd 08/30/2018. These shares were inadvertently reported as being held indirectly by the James J. Kim 2018-1 Qualified Annuity Trust U/A on a Form 4 filed by the Reporting Person on November 24, 2025. These shares were direct holdings of the Reporting Person, as the Reporting Person is the settlor, sole trustee, and sole beneficiary of such trust.

F2 · balance_after: On December 19, 2025, the Reporting Person made a distribution of 3,244,594 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No.1 of James J. Kim.

Read SEC document
November 21, 2025 Filed Nov 25, 2025 01:58 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 965,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000013 · wk-form4_1764035900.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Indirect · By trusts (excluding GRATs)

Disclosed balance after: 965,000

F1 · shares: On November 20, 2025, the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024 distributed 965,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18. The Reporting Person and Susan Y. Kim are co-trustees of the trust.

Read SEC document
August 01, 2025 Filed Aug 5, 2025 23:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 441,589 $21.85 $9,648,719.65
Disclosure

SEC source: 0001158839-25-000011 · wk-form4_1754436730.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,341,239

F1 · shares: On August 1, 2025, the Reporting Person distributed 441,589 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group.

Read SEC document
July 30, 2025 Filed Aug 1, 2025 20:42 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 1,738,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000009 · wk-form4_1754080942.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 1,833,000

F2 · balance_after: On July 30, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 1,738,000 shares of the Issuer's Common Stock to Agnes C. Kim, the spouse of the Reporting Person.

F3 · balance_after: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Read SEC document
July 30, 2025 Filed Aug 1, 2025 20:42 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 2,711,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000009 · wk-form4_1754080942.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,782,828

F1 · balance_after: On July 30, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 2,711,000 of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the Reporting Person.

Read SEC document
February 24, 2025 Filed Feb 26, 2025 22:13 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 869,565 $21.85 $18,999,995.25
Disclosure

SEC source: 0001158839-25-000004 · wk-form4_1740608029.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,828

F1 · shares: On February 24, 2025, the Reporting Person distributed 869,565 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group.

Read SEC document
February 19, 2025 Filed Feb 21, 2025 21:46 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 1,528 $22.72 $34,716.16
Disclosure

SEC source: 0001047127-25-000042 · wk-form4_1740174405.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 941,393

F2 · kind: The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

Read SEC document
February 19, 2025 Filed Feb 21, 2025 21:46 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantCommon Stock 3,196 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000042 · wk-form4_1740174405.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 942,921

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 3,196 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

Read SEC document
January 17, 2025 Filed Jan 22, 2025 21:59 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 548,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-25-000002 · wk-form4_1737583135.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Indirect · By self as Trustee of own GRATs

Disclosed balance after: 0

F1 · shares: On January 17, 2025, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 (the "JJK 2021 Trust") distributed 274,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Susan Y. Kim and 274,000 shares of the Issuer's Common Stock to John T. Kim. The Reporting Person and Susan Y. Kim are co-trustees of the JJK 2021 Trust.

F2 · balance_after: On January 7, 2025, the JJK 2021 Trust distributed 790,097 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is a trustee of the JJK 2021 Trust, this transaction was a mere change in the Reporting Person's form of ownership from indirect to direct and thus not reportable on a Form 4.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 6,457 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 17

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,457 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_price: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

F10 · derivative.exercise_date: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

F10 · derivative.expiration_date: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 1,639 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 16

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,639 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · derivative.exercise_price: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

F9 · derivative.exercise_date: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

F9 · derivative.expiration_date: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 1,840 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 15

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,840 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_price: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

F8 · derivative.exercise_date: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

F8 · derivative.expiration_date: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 1,962 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 14

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,962 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_price: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

F7 · derivative.exercise_date: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

F7 · derivative.expiration_date: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 2,744 $25.45 $69,834.80
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 8

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,628

F4 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 20, 2024 (the "2024 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.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 6,457 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 7

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,372

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 697 $25.45 $17,738.65
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,915

F3 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 16, 2023 (the "2023 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.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 1,639 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,612

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 782 $25.45 $19,901.90
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,973

F2 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 24, 2022 (the "2022 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.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 1,840 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,755

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 834 $25.45 $21,225.30
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,915

F1 · kind: 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 11, 2021 (the "2021 Grant Date") pursuant to the Issuer's 2007 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.

Read SEC document
October 31, 2024 Filed Nov 4, 2024 21:34 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 1,962 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,749

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
August 08, 2024 Filed Aug 12, 2024 21:21 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 1,600,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-24-000005 · wk-form4_1723497684.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 95,000

F2 · shares: On August 8, 2024, Agnes C. Kim transferred 1,600,000 shares of the Issuer's Common Stock to the 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 as a gift. Agnes C. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the trust.

F3 · balance_after: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Read SEC document
August 08, 2024 Filed Aug 12, 2024 21:21 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 2,200,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-24-000005 · wk-form4_1723497684.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 142,787

F1 · shares: On August 8, 2024, the Reporting Person transferred 2,200,000 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") to the 2024 Grantor Annuity Trust of James J. Kim dtd. 8/5/2024 as a gift. Susan Y. Kim is the sole trustee of the trust.

Read SEC document
June 12, 2024 Filed Jun 14, 2024 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 980,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-24-000002 · wk-form4_1718400602.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 1,695,000

F2 · shares: On June 12, 2024, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 980,000 shares of the Issuer's Common Stock to Agnes C. Kim, the spouse of the Reporting Person.

F3 · balance_after: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Read SEC document
June 12, 2024 Filed Jun 14, 2024 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 1,530,000 $0.00 $0.00
Disclosure

SEC source: 0001158839-24-000002 · wk-form4_1718400602.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,342,787

F1 · shares: On June 12, 2024, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 1,530,000 of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the Reporting Person.

Read SEC document
February 23, 2024 Filed Feb 27, 2024 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 2,599 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000048 · wk-form4_1709069441.xml · derivative · entry 8

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,374

Underlying: Common Stock · 2,599 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F4 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F4 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

Read SEC document
February 23, 2024 Filed Feb 27, 2024 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 1,051 $30.59 $32,150.09
Disclosure

SEC source: 0001047127-24-000048 · wk-form4_1709069441.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 812,787

F1 · kind: 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 24, 2022 (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

Read SEC document
February 23, 2024 Filed Feb 27, 2024 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 2,599 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000048 · wk-form4_1709069441.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 813,838

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 20, 2024 Filed Feb 22, 2024 22:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 27,731 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000034 · wk-form4_1708641162.xml · derivative · entry 8

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (6)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,731

Underlying: Common Stock · 27,731 shares

Expires not disclosed

F5 · derivative.exercise_price: Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date.

F5 · derivative.exercise_date: Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date.

F5 · derivative.expiration_date: Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date.

Read SEC document
February 20, 2024 Filed Feb 22, 2024 22:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 6,976 $29.75 $207,536.00
Disclosure

SEC source: 0001047127-24-000034 · wk-form4_1708641162.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (6)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 811,239

F2 · kind: The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

Read SEC document
February 20, 2024 Filed Feb 22, 2024 22:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantCommon Stock 16,444 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000034 · wk-form4_1708641162.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (6)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 818,215

F1 · kind: This Form 4 reports the vesting on February 20, 2024, of 16,444 shares of Amkor Technology, Inc. (the "Issuer") Common Stock underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 24, 2022 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic cumulative earnings per share performance goal over a two-year performance period beginning January 1, 2022 and ending on December 31, 2023.

Read SEC document
February 16, 2024 Filed Feb 21, 2024 22:02 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 2,242 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000022 · wk-form4_1708552922.xml · derivative · entry 7

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,959

Underlying: Common Stock · 2,242 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 9,279 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F4 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 9,279 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

Read SEC document
February 16, 2024 Filed Feb 21, 2024 22:02 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 922 $30.01 $27,669.22
Disclosure

SEC source: 0001047127-24-000022 · wk-form4_1708552922.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 801,771

F1 · kind: 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 16, 2023 (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.

Read SEC document
February 16, 2024 Filed Feb 21, 2024 22:02 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 2,242 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000022 · wk-form4_1708552922.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 802,693

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
February 09, 2024 Filed Feb 13, 2024 22:14 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 2,630 $0.00 Strike: $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000012 · wk-form4_1707862438.xml · derivative · entry 7

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,723

Underlying: Common Stock · 2,630 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F4 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

Read SEC document
February 09, 2024 Filed Feb 13, 2024 22:14 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 1,081 $31.20 $33,727.20
Disclosure

SEC source: 0001047127-24-000012 · wk-form4_1707862438.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 800,451

F1 · kind: The transaction represents share 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 11, 2021 (the "Grant Date") pursuant to the Issuer's Second Amended and Restated 2007 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.

Read SEC document
February 09, 2024 Filed Feb 13, 2024 22:14 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 2,630 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000012 · wk-form4_1707862438.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 801,532

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
December 22, 2023 Filed Dec 27, 2023 21:30 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 715,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059787 · doc4.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (4)

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 715,000

F1 · shares: On December 22, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement dated 12/6/2020 (the "ACK Trust") distributed 715,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Agnes C. Kim. Agnes C. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the ACK Trust.

F2 · balance_after: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 78 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · derivative · entry 14

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,201

Underlying: Common Stock · 78 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F3 · shares: The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F3 · derivative.exercise_date: The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F3 · derivative.expiration_date: The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 88 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · derivative · entry 13

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,973

Underlying: Common Stock · 88 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F2 · shares: The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F2 · derivative.exercise_date: The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F2 · derivative.expiration_date: The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

F7 · balance_after: Reflects an adjustment of 88 RSUs incorrectly attributed to the Reporting Person on the Form 4 filed on behalf of the Reporting Person on February 24, 2023 that had been surrendered for the Reporting Person's retirement eligibility withholding.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 93 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · derivative · entry 12

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,353

Underlying: Common Stock · 93 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the "Issuer") issuable upon the early vesting of an equal number of restricted stock units ("RSUs") to pay taxes associated with the Reporting Person's retirement eligibility status.

F1 · shares: The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the "Issuer") issuable upon the early vesting of an equal number of restricted stock units ("RSUs") to pay taxes associated with the Reporting Person's retirement eligibility status.

F1 · derivative.exercise_date: The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the "Issuer") issuable upon the early vesting of an equal number of restricted stock units ("RSUs") to pay taxes associated with the Reporting Person's retirement eligibility status.

F1 · derivative.expiration_date: The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the "Issuer") issuable upon the early vesting of an equal number of restricted stock units ("RSUs") to pay taxes associated with the Reporting Person's retirement eligibility status.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 529,650 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · nonDerivative · entry 8

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 798,902

F4 · shares: On December 19, 2023, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 distributed 529,650 of the Issuer's Common Stock to the Reporting Person.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 529,650 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · nonDerivative · entry 7

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Indirect · By self as Trustee of own GRATs

Disclosed balance after: 1,338,097

F4 · shares: On December 19, 2023, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 distributed 529,650 of the Issuer's Common Stock to the Reporting Person.

F5 · balance_after: The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

F6 · balance_after: The Reporting Person is (i) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,338,097 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 9,786,032 shares of the Issuer's Common Stock and (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

Read SEC document
December 19, 2023 Filed Dec 21, 2023 22:10 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 78 $33.79 $2,635.62
Disclosure

SEC source: 0001209191-23-059460 · doc4.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (8)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 269,252

F3 · kind: The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.