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person · Reporting owner

KIM JAMES J

Disclosed activity across 1 company

Tapewire entity
29209
SEC CIK
0001158839

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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

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

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Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
December 27, 2021 Filed Jan 21, 2022 16:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 164,678 $23.45 $3,861,699.10
Disclosure

SEC source: 0000899243-22-002803 · doc4.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: Not disclosed

Ownership: Indirect · By Susan Y. Kim 2012 Generation-Skipping Trust

Disclosed balance after: 164,678

F4 · shares: On December 27, 2021, Susan Y. Kim transferred 164,678 shares of the Issuer's Common Stock to Susins, LLC. Susins, LLC is being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"). The Susan Y. Kim 2012 Generation-Skipping Trust Dated December 11, 2012 is being treated as a controlling shareholder of Susins, LLC. The reporting person is a trustee of said trust and members of his immediate family are beneficiaries thereof. The reporting person's indirect holding of these 164,678 shares of the Issuer's Common Stock was inadvertently omitted from his Form 4 that was filed with the Commission on January 4, 2022.

F6 · balance_after: Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of the shares held by these trusts and partnerships. 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, or for any other purpose.

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December 27, 2021 Filed Apr 21, 2022 01:04 UTC Amendment AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 164,678 $0.00 $0.00
Disclosure

SEC source: 0000899243-22-015250 · doc4a.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By trusts (excl. own GRATs & Susan Y. Kim 2018-1 Qualified Annuity Trust dtd. 8/29/18)

Disclosed balance after: 12,678,815

F1 · shares: On January 27, 2022, the Reporting Person filed a Form 4 (the "Original Form 4") which inadvertently omitted a transaction which resulted in an increase in the indirect holdings of the Reported Person as the trustee of a trust for the benefit of members of the Reporting Person's immediate family. On December 27, 2021, a transfer of 164,678 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") was made to a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"). The Reporting Person is a trustee of a trust which is a member of such limited liability company. The beneficiaries of the trust are members of the Reporting Person's immediate family. The trust is being treated as the "controlling shareholder" of the limited liability company for purposes of Section 16.

F2 · shares: (Continued from Footnote 1) Although the above described transfer of shares of the Issuer's Common Stock was not reported on the Original Form 4, such shares were correctly included in the indirect holdings of the Reporting Person on the Original Form 4

F3 · balance_after: The Reporting Person is a trustee of trusts for the benefit of his immediate family members (excluding his own grantor retained annuity trusts and the Qualified Annuity Trust Under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd 8/29/18) which own 12,678,815 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. 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, or for any other purpose.

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December 21, 2021 Filed Dec 24, 2021 01:41 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Tax withholdingCommon Stock 94 $22.60 $2,124.40
Disclosure

SEC source: 0000899243-21-049718 · doc4.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 460,799

F1 · balance_after: The reporting transaction involved the withholding of 94 shares of the Issuer's Common Stock upon the early vesting of an equal number of restricted stock units. In accordance with the relevant plan and award agreement, the shares were withheld in order to pay taxes associated with the reporting person's becoming retirement eligible. The total reported in Column 5 includes 10,799 previously reported restricted stock units and previously reported options to purchase 450,000 shares of the Issuer's Common Stock..

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October 04, 2021 Filed Jan 21, 2022 16:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 626,192 $24.70 $15,466,942.40
Disclosure

SEC source: 0000899243-22-002803 · doc4.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: Not disclosed

Ownership: Indirect · By James J. Kim 2018-1 GRAT

Disclosed balance after: 0

F3 · shares: On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to John T. Kim. The reporting person and John T. Kim are father and son.

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October 04, 2021 Filed Jan 21, 2022 16:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 626,192 $24.70 $15,466,942.40
Disclosure

SEC source: 0000899243-22-002803 · doc4.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: Not disclosed

Ownership: Indirect · By James J. Kim 2018-1 GRAT

Disclosed balance after: 626,192

F2 · shares: On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to Susan Y. Kim. The reporting person and Susan Y. Kim are the co-trustees of the trust.

F6 · balance_after: Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of the shares held by these trusts and partnerships. 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, or for any other purpose.

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July 14, 2021 Filed Jan 21, 2022 16:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 271,895 $23.15 $6,294,369.25
Disclosure

SEC source: 0000899243-22-002803 · doc4.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: Not disclosed

Ownership: Indirect · By Susan Y. Kim 2020-1 GRAT

Disclosed balance after: 2,728,105

F1 · shares: On July 14, 2021, the Qualified Annuity Trust Under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement Dated 04/01/20 distributed 271,895 shares of the Issuer's Common Stock to Susan Y. Kim. Susan Y. Kim and the reporting person are the co-trustees of the trust. The reporting person and Susan Y. Kim are father and daughter.

F6 · balance_after: Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of the shares held by these trusts and partnerships. 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, or for any other purpose.

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February 11, 2021 Filed Feb 18, 2021 23:08 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantCommon Stock 10,893 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-012050 · doc4.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,725,770

F1 · shares: These are Time-Vested Restricted Stock Units which were granted on February 11, 2021 and vest in four equal annual installments; 25% on each anniversary of the grant date.

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February 11, 2021 Filed Dec 30, 2021 00:54 UTC Amendment AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantCommon Stock 10,893 $0.00 $0.00
Disclosure

SEC source: 0000899243-21-050061 · doc4a.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,275,770

F1 · shares: As reported on a Form 4 timely filed with the Commission by the reporting person on February 18, 2021 (the "Original Form 4"), 10,893 Time-Vested Restricted Stock Units which vest 25% on each of the first four anniversaries of the grant date were granted to the reporting person on February 11, 2021.

F2 · balance_after: The original Form 4 incorrectly included options to purchase 450,000 shares of the Issuer's Common Stock in the reporting person's directly owned stock in Column 5 of Table I.

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December 21, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 4,083,065 $15.01 $61,286,805.65
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By spouse

Disclosed balance after: 23

F3 · balance_after: Agnes C. Kim is the spouse of the reporting person. 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, or for any other purpose.

F7 · balance_after: On December 21, 2020, Agnes C. Kim transferred 4,083,065 shares of the Issuer's Common Stock to the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A Dated 12/16/20 as a gift. Susan Y. Kim is the sole trustee of the trust. This transaction was previously reported on Form 3 for the trust and Form 4 for Susan Y. Kim.

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December 17, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 1,633,226 $15.41 $25,168,012.66
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By spouse

Disclosed balance after: 23

F3 · balance_after: Agnes C. Kim is the spouse of the reporting person. 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, or for any other purpose.

F6 · balance_after: On December 17, 2020, the James J. Kim 2008 Trust FBO Descendants of John T. Kim dated 2/5/08 transferred 1,633,226 shares of the Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a note payable to her by such trust. John T. Kim and Susan Y. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person.

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December 17, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 816,613 $15.41 $12,584,006.33
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By spouse

Disclosed balance after: 23

F3 · balance_after: Agnes C. Kim is the spouse of the reporting person. 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, or for any other purpose.

F5 · balance_after: On December 17, 2020, the James J. Kim 2008 Trust FBO Dylan James Panichello & Descendants dated 2/5/08 transferred 816,613 shares of the Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a note payable to her by such trust. John T. Kim and Susan Y. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person.

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December 17, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 816,613 $15.41 $12,584,006.33
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By spouse

Disclosed balance after: 23

F3 · balance_after: Agnes C. Kim is the spouse of the reporting person. 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, or for any other purpose.

F4 · balance_after: On December 17, 2020, the James J. Kim 2008 Trust FBO Jacqueline Mary Panichello & Descendants dated 2/5/08 transferred 816,613 shares of the Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a note payable to her by such trust. John T. Kim and Susan Y. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person.

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December 17, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 816,613 $15.41 $12,584,006.33
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By spouse

Disclosed balance after: 23

F2 · balance_after: On December 17, 2020, the James J. Kim 2008 Trust FBO Alexandra Kim Panichello & Descendants dated 2/5/08 transferred 816,613 shares of the Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a note payable to her by such trust. John T. Kim and Susan Y. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person.

F3 · balance_after: Agnes C. Kim is the spouse of the reporting person. 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, or for any other purpose.

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March 16, 2020 Filed Feb 16, 2021 13:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 46,923 $7.47 $350,514.81
Disclosure

SEC source: 0000899243-21-006553 · doc5.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 6,417,888

F1 · balance_after: On March 16, 2020, the James J. Kim Qualified Annuity Trust U/A Dated 10/13/14 distributed 15,641 shares of the Issuer's Common Stock to each of Susan Y. Kim, John T. Kim and David D. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F9 · balance_after: On March 2, 2020, the James J. Kim Qualified Annuity Trust U/A Dated 10/13/14 distributed 91,392 shares of the Issuer's Common Stock to the reporting person. James J. Kim and Susan Y. Kim are co-trustees of the trust. On May 26, 2020, the reporting person transferred 1,564,323 shares of the Issuer's Common Stock to the James J. Kim 2020-1 Qualified Annuity Trust under the James J. Kim 2020-1 Qualified Annuity Trust Agreement dated 4/1/20. Susan Y. Kim and James J. Kim are co-trustees of the trust. On December 15, 2020, the James J. Kim 2019-1 Qualified Annuity Trust U/A Dated 9/10/19 distributed 727,169 shares of the Issuer's Common Stock to the reporting person

F10 · balance_after: (Continued From Footnote 9) James J. Kim and Susan Y. Kim are co-trustees of the trust. On December 15, 2020, the James J. Kim 2018-1 Qualified Annuity Trust U/A Dated 8/30/18 distributed 446,316 shares of the Issuer's Common Stock to the reporting person. James J. Kim and Susan Y. Kim are co-trustees of the trust. Pursuant to the Form 5 instructions, in his capacity as a co-trustee of the trusts, the reporting person is being treated as having a pecuniary interest in all of the shares held by such trusts. Accordingly, transfers between the reporting person and such trusts result in mere changes from direct to indirect ownership or vice versa. Such transfers are therefore not reported on this Form 5. On December 31, 2020, such grantor retained annuity trusts held 6,417,888 shares of the Issuer's Common Stock.

F11 · balance_after: The reporting person may be deemed to indirectly own 6,417,888 shares of the Issuer's Common Stock held by grantor retained annuity trusts (see footnote 8) and 49,594,980 shares of the Issuer's Common Stock held by a limited partnership established for the benefit of members of the James J. Kim family of which the reporting person is a general partner. 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, or for any other purpose.

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December 16, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 443,100 $12.92 $5,724,852.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 7

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,371,803

F4 · kind: On December 16, 2019, the James J. Kim 2018-1 Qualified Annuity Trust U/A dtd 8/30/18 transferred 443,100 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

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December 16, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 443,100 $12.92 $5,724,852.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,735,697

F4 · kind: On December 16, 2019, the James J. Kim 2018-1 Qualified Annuity Trust U/A dtd 8/30/18 transferred 443,100 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

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October 17, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 4,000,000 $9.88 $39,520,000.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,735,697

F3 · kind: On October 17, 2019, James J. Kim transferred 4,000,000 shares of the Issuer's Common Stock to the James J. Kim 2019-1 Qualified Annuity Trust U/A Dated 9/10/19. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

Read SEC document
October 17, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 4,000,000 $9.88 $39,520,000.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,371,803

F3 · kind: On October 17, 2019, James J. Kim transferred 4,000,000 shares of the Issuer's Common Stock to the James J. Kim 2019-1 Qualified Annuity Trust U/A Dated 9/10/19. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

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October 09, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 215,700 $9.65 $2,081,505.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,735,697

F2 · kind: On October 9, 2019, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018 distributed 215,700 shares of the Issuer's Common Stock to Susan Y. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

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February 15, 2019 Filed Feb 20, 2019 17:46 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantEmployee Stock Option (Right-to-Buy) · Derivative 250,000 $0.00 Strike: $9.48 $0.00
Disclosure

SEC source: 0001209191-19-011422 · doc4.xml · derivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 250,000

Underlying: Amkor Technology, Inc., Common Stock · 250,000 shares

Expires 2029-02-15

F3 · derivative.exercise_date: This option grant vests as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16th of the option vests each quarter thereafter, such that 100% of the option will be vested on the fourth anniversary of the grant date.

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January 30, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 95,000 $7.88 $748,600.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,371,803

F1 · kind: On January 30, 2019, the James J. Kim 2014 Qualified Annuity Trust U/A dated 10/13/14 distributed 95,000 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

Read SEC document
January 30, 2019 Filed Feb 14, 2020 16:56 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 95,000 $7.88 $748,600.00
Disclosure

SEC source: 0000899243-20-004598 · doc5.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,735,697

F1 · kind: On January 30, 2019, the James J. Kim 2014 Qualified Annuity Trust U/A dated 10/13/14 distributed 95,000 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees of the trust.

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, or for any other purpose.

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October 31, 2018 Filed Nov 2, 2018 21:20 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 4,085,000 $7.19 $29,371,150.00
Disclosure

SEC source: 0000899243-18-028045 · doc4.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · See Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,621,203

F1 · kind: On October 31, 2018, 4,085,000 shares of the Issuer's Common Stock were transferred from Turquoise Investments Ltd., a Cayman Islands corporation, to James J. Kim. All of the stock of Turquoise Investments Ltd. is owned by Swallow Ltd., a Cayman Islands corporation. All of the stock of Swallow Ltd. is owned by an irrevocable trust created May 10, 1994 of which James J. Kim is the sole beneficiary. The trust was funded by the father of James J. Kim. Turquoise Investments Ltd. and Swallow Ltd. are being dissolved and the trust is being terminated.

F2 · balance_after: Includes 49,594,980 shares held by 915 Investments, LP, in which the reporting person is the general partner.

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October 08, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 2,000,000 $6.93 $13,860,000.00
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 12

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F8 · kind: On October 8, 2018, Susan Y. Kim transferred 2,000,000 shares of the Issuer's Common Stock to the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd 8/29/18. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
October 05, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 1,139,605 $7.16 $8,159,571.80
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 11

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F7 · kind: On October 5, 2018, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 1,139,605 shares of the Issuer's Common Stock to John T. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
October 05, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 1,139,605 $7.16 $8,159,571.80
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 10

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F6 · kind: On October 5, 2018, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 1,139,605 shares of the Issuer's Common Stock to Susan Y. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
September 21, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 941,223 $7.82 $7,360,363.86
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 9

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,621,203

F5 · kind: On September 21, 2018, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 941,223 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
September 21, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 941,223 $7.82 $7,360,363.86
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 8

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F5 · kind: On September 21, 2018, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 941,223 shares of the Issuer's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
September 07, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 2,470,150 $7.86 $19,415,379.00
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 7

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F4 · kind: On September 7, 2018, James J. Kim transferred 2,470,150 shares of the Issuer's Common Stock to the James J. Kim 2018-1 Qualified Annuity Trust U/A dtd 8/30/18. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
September 07, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 2,470,150 $7.86 $19,415,379.00
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,621,203

F4 · kind: On September 7, 2018, James J. Kim transferred 2,470,150 shares of the Issuer's Common Stock to the James J. Kim 2018-1 Qualified Annuity Trust U/A dtd 8/30/18. James J. Kim and Susan Y. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
July 09, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 7,828,682 $8.85 $69,283,835.70
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F3 · kind: On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12. John T. Kim and James J. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
July 09, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 7,828,682 $8.85 $69,283,835.70
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F3 · kind: On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12. John T. Kim and James J. Kim are co-trustees.

F9 · 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, or for any other purpose.

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April 04, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 2,138,382 $9.63 $20,592,618.66
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F2 · kind: On April 4, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 2,138,382 shares of the Issuer's Common Stock to John T. Kim. John T. Kim and James J. Kim are co-trustees.

F9 · 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, or for any other purpose.

Read SEC document
February 21, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 63,880 $10.11 $645,826.80
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,621,203

F1 · kind: On February 21, 2018, the James J. Kim 2014 Qualified Annuity Trust U/A dated 10/13/14 distributed 63,880 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees.

F9 · 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, or for any other purpose.

Read SEC document
February 21, 2018 Filed Feb 14, 2019 22:18 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 63,880 $10.11 $645,826.80
Disclosure

SEC source: 0000899243-19-003647 · doc5.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 14,489,497

F1 · kind: On February 21, 2018, the James J. Kim 2014 Qualified Annuity Trust U/A dated 10/13/14 distributed 63,880 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees.

F9 · 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, or for any other purpose.

Read SEC document
September 11, 2017 Filed Feb 14, 2018 17:44 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 686,108 $9.06 $6,216,138.48
Disclosure

SEC source: 0000899243-18-003799 · doc5.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,301,250

F3 · kind: On September 11, 2017, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 686,108 shares of the Company's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

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September 11, 2017 Filed Feb 14, 2018 17:44 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 686,108 $9.06 $6,216,138.48
Disclosure

SEC source: 0000899243-18-003799 · doc5.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 15,442,042

F3 · kind: On September 11, 2017, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 686,108 shares of the Company's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F4 · 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, or for any other purpose.

Read SEC document
March 02, 2017 Filed Feb 14, 2018 17:44 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 1,687,829 $10.21 $17,232,734.09
Disclosure

SEC source: 0000899243-18-003799 · doc5.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 15,442,042

F2 · kind: On March 2, 2017, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 1,687,829 shares to the John T. Kim Trust of December 31, 1987. John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12. John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987.

F4 · 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, or for any other purpose.

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February 27, 2017 Filed Mar 1, 2017 23:36 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantEmployee Stock Option (Right-to-Buy) · Derivative 200,000 $0.00 Strike: $9.86 $0.00
Disclosure

SEC source: 0001209191-17-016112 · doc4.xml · derivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 200,000

Underlying: Amkor Technology, Inc., Common Stock · 200,000 shares

Expires 2027-02-27

F3 · derivative.exercise_date: This option grant vests as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16th of the option vests each quarter thereafter, such that 100% of the option will be vested on the fourth anniversary of the grant date.

Read SEC document
February 22, 2017 Filed Feb 14, 2018 17:44 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 53,105 $10.25 $544,326.25
Disclosure

SEC source: 0000899243-18-003799 · doc5.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,301,250

F1 · kind: On February 22, 2017, the James J. Kim 2014 Qualified Annuity Trust U/A dated October 13, 2014 distributed 53,105 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees of the trust.

Read SEC document
February 22, 2017 Filed Feb 14, 2018 17:44 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 53,105 $10.25 $544,326.25
Disclosure

SEC source: 0000899243-18-003799 · doc5.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 15,442,042

F1 · kind: On February 22, 2017, the James J. Kim 2014 Qualified Annuity Trust U/A dated October 13, 2014 distributed 53,105 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees of the trust.

F4 · 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, or for any other purpose.

Read SEC document
August 04, 2016 Filed Feb 15, 2017 20:07 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 683,460 $7.58 $5,180,626.80
Disclosure

SEC source: 0000899243-17-004198 · doc5.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,512,037

F3 · kind: On August 4, 2016, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 683,460 shares of the Company's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

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August 04, 2016 Filed Feb 15, 2017 20:07 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 683,460 $7.58 $5,180,626.80
Disclosure

SEC source: 0000899243-17-004198 · doc5.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,869,084

F3 · kind: On August 4, 2016, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 683,460 shares of the Company's Common Stock to James J. Kim. James J. Kim and Susan Y. Kim are co-trustees.

F4 · 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, or for any other purpose.

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February 22, 2016 Filed Feb 15, 2017 20:07 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 94,950 $4.79 $454,810.50
Disclosure

SEC source: 0000899243-17-004198 · doc5.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,512,037

F2 · kind: On February 22, 2016, the James J. Kim 2014 Qualified Annuity Trust U/A dated October 13, 2014 distributed 94,950 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees of the trust.

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February 22, 2016 Filed Feb 15, 2017 20:07 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 94,950 $4.79 $454,810.50
Disclosure

SEC source: 0000899243-17-004198 · doc5.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,869,084

F2 · kind: On February 22, 2016, the James J. Kim 2014 Qualified Annuity Trust U/A dated October 13, 2014 distributed 94,950 shares to James J. Kim. James J. Kim and Susan Y. Kim are co- trustees of the trust.

F4 · 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, or for any other purpose.

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February 01, 2016 Filed Feb 15, 2017 20:07 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 OtherCommon Stock 2,413,880 $5.96 $14,386,724.80
Disclosure

SEC source: 0000899243-17-004198 · doc5.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · Director · 10% owner · Exhibit 99.1

10b5-1 filing: Not disclosed

Ownership: Indirect · By self as trustee

Disclosed balance after: 17,869,084

F1 · kind: On February 1, 2016, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 2,413,880 shares to the John T. Kim Trust of December 31, 1987. John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12. John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987.

F4 · 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, or for any other purpose.

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