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CHURCHILL WINSTON J

Disclosed activity across 5 companies

Tapewire entity
27596
SEC CIK
0000923792

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
AMKOR TECHNOLOGY, INC.AMKR · Entity 3481DirectorSeptember 22, 2026September 24, 2026
Baudax Bio, Inc.BXRX · Entity 109081DirectorJune 15, 2022June 17, 2022
Lifeward Ltd.RWLK · Entity 762010% ownerJune 26, 2017June 28, 2017

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 September 22, 2026 · Filed September 24, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect2,619.5144 Reported balance After 2026-09-22 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-09-22 · Grant · Acquired 3.9978 · Balance 2,619.5144

F1: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Filing footnotes · ownership attribution and instrument terms

F1: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Baudax Bio, Inc.

Report date June 15, 2022 · Filed June 17, 2022

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect46,820 Reported balance After 2022-06-15 transaction · row 1
1 source row

Row 1 · 2022-06-15 · Grant · Acquired 39,473 · Balance 46,820

F1: Each Restricted Stock Unit ("RSU") is the economic equivalent of one share of Baudax Bio, Inc. (the "Company") common stock, and may be settled, at the Company's option, in cash, shares of common stock, or a combination thereof. The RSUs vest in full on June 15, 2023, subject to continued service with the Company through the vesting date. Upon vesting, if settled in cash, each RSU will entitle the grantee to a cash-payment equal to the "Fair Market Value" (as defined in the Company's 2019 Equity Incentive Plan) of one share of the Company's common stock on the vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: Each Restricted Stock Unit ("RSU") is the economic equivalent of one share of Baudax Bio, Inc. (the "Company") common stock, and may be settled, at the Company's option, in cash, shares of common stock, or a combination thereof. The RSUs vest in full on June 15, 2023, subject to continued service with the Company through the vesting date. Upon vesting, if settled in cash, each RSU will entitle the grantee to a cash-payment equal to the "Fair Market Value" (as defined in the Company's 2019 Equity Incentive Plan) of one share of the Company's common stock on the vesting date.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Ordinary Shares, par value NIS 0.01 per shareSEC Table I · non-derivativeDirect339,900 Last balance in matching sequence After 2017-06-27 transaction · row 2 Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
2 source rows

Row 1 · 2017-06-26 · Sale · Disposed 9,271 · Balance 352,411

F1: Transaction made pursuant to a Rule 10b5-1 trading plan adopted December 15, 2016.

F2: The Ordinary Shares are directly held by SCP Vitalife Partners (Israel) II, L.P. ("SCP Vitalife") and indirectly held by SCP Vitalife II Associates, L.P. ("SCP Vitalife Associates"), the sole general partner of SCP Vitalife, SCP Vitalife II, GP, Ltd. ("SCP Vitalife GP"), the sole general partner of SCP Vitalife Associates, and the individual directors of SCP Vitalife GP (SCP Vitalife Associates, SCP Vitalife GP and the individual directors of SCP Vitalife GP together, the "SCP Vitalife Indirect Reporting Persons"). The individual directors of SCP Vitalife GP are Jeffrey Dykan, Winston J. Churchill, Abraham Ludomirski and Wayne B. Weisman. The SCP Vitalife Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the SCP Vitalife Ordinary Shares in which the SCP Vitalife Indirect Reporting Persons have no pecuniary interest.

Row 2 · 2017-06-27 · Sale · Disposed 12,511 · Balance 339,900

F1: Transaction made pursuant to a Rule 10b5-1 trading plan adopted December 15, 2016.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.0000 to $3.2000, inclusive. The reporting person undertakes to provide to ReWalk Robotics, Ltd. ("ReWalk"), any security holder of ReWalk, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3) to this Form 4.

F2: The Ordinary Shares are directly held by SCP Vitalife Partners (Israel) II, L.P. ("SCP Vitalife") and indirectly held by SCP Vitalife II Associates, L.P. ("SCP Vitalife Associates"), the sole general partner of SCP Vitalife, SCP Vitalife II, GP, Ltd. ("SCP Vitalife GP"), the sole general partner of SCP Vitalife Associates, and the individual directors of SCP Vitalife GP (SCP Vitalife Associates, SCP Vitalife GP and the individual directors of SCP Vitalife GP together, the "SCP Vitalife Indirect Reporting Persons"). The individual directors of SCP Vitalife GP are Jeffrey Dykan, Winston J. Churchill, Abraham Ludomirski and Wayne B. Weisman. The SCP Vitalife Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the SCP Vitalife Ordinary Shares in which the SCP Vitalife Indirect Reporting Persons have no pecuniary interest.

Filing footnotes · ownership attribution and instrument terms

F1: Transaction made pursuant to a Rule 10b5-1 trading plan adopted December 15, 2016.

F2: The Ordinary Shares are directly held by SCP Vitalife Partners (Israel) II, L.P. ("SCP Vitalife") and indirectly held by SCP Vitalife II Associates, L.P. ("SCP Vitalife Associates"), the sole general partner of SCP Vitalife, SCP Vitalife II, GP, Ltd. ("SCP Vitalife GP"), the sole general partner of SCP Vitalife Associates, and the individual directors of SCP Vitalife GP (SCP Vitalife Associates, SCP Vitalife GP and the individual directors of SCP Vitalife GP together, the "SCP Vitalife Indirect Reporting Persons"). The individual directors of SCP Vitalife GP are Jeffrey Dykan, Winston J. Churchill, Abraham Ludomirski and Wayne B. Weisman. The SCP Vitalife Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the SCP Vitalife Ordinary Shares in which the SCP Vitalife Indirect Reporting Persons have no pecuniary interest.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.0000 to $3.2000, inclusive. The reporting person undertakes to provide to ReWalk Robotics, Ltd. ("ReWalk"), any security holder of ReWalk, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3) to this Form 4.

Past disclosures · reporting ended (2)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

INNOVATIVE SOLUTIONS & SUPPORT INC

Report date June 13, 2023 · Filed June 14, 2023

Section 16 reporting ended · disclosed 2023-06-14. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect9,523 Reported balance After 2023-06-13 transaction · row 1
1 source row

Row 1 · 2023-06-13 · Sale · Disposed 3,499 · Balance 9,523

Societal CDMO, Inc.

Report date April 08, 2024 · Filed April 09, 2024

Section 16 reporting ended · disclosed 2024-04-09. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Ending reported balance After 2024-04-08 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2024-04-08 · Other · Disposed 227,982 · Balance 73,620

F1: Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), dated as of February 28, 2024, by and among the Issuer, CoreRx, Inc., a Florida corporation ("Parent") and Cane Merger Sub, Inc., a Pennsylvania corporation and a wholly owned Subsidiary of Parent ("Merger Sub"), Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share") and thereafter merged with and into the Issuer, effective as of April 8, 2024 (the "Effective Time") with the Issuer surviving the merger. At the Effective Time, each issued and outstanding Share was cancelled and converted into the right to receive $1.10 per Share in cash (the "Offer Amount"), subject to any applicable withholding taxes and without interest.

Row 2 · 2024-04-08 · Disposition to issuer · Disposed 73,620 · Balance 0

F2: Represents restricted stock units granted under an Issuer equity plan ("RSUs") granted to the Reporting Person. Each RSU represented a contingent right to receive one Share upon vesting of the RSU. Pursuant to the terms of the Merger Agreement, each outstanding RSU that was outstanding and unvested immediately prior to the Effective Time vested in full. At the Effective Time, each RSU then outstanding was cancelled and converted into a cash payment equal to the product of (A) the total number of Shares then underlying such RSU multiplied by (B) the Offer Amount, without interest and subject to any withholding of taxes.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $0.80Direct0 Reported balance After 2024-04-08 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2024-04-08 · Disposition to issuer · Disposed 118,182 · Balance 0

F3: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $0.74Direct0 Reported balance After 2024-04-08 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2024-04-08 · Disposition to issuer · Disposed 27,229 · Balance 0

F3: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

Filing footnotes · ownership attribution and instrument terms

F1: Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), dated as of February 28, 2024, by and among the Issuer, CoreRx, Inc., a Florida corporation ("Parent") and Cane Merger Sub, Inc., a Pennsylvania corporation and a wholly owned Subsidiary of Parent ("Merger Sub"), Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share") and thereafter merged with and into the Issuer, effective as of April 8, 2024 (the "Effective Time") with the Issuer surviving the merger. At the Effective Time, each issued and outstanding Share was cancelled and converted into the right to receive $1.10 per Share in cash (the "Offer Amount"), subject to any applicable withholding taxes and without interest.

F2: Represents restricted stock units granted under an Issuer equity plan ("RSUs") granted to the Reporting Person. Each RSU represented a contingent right to receive one Share upon vesting of the RSU. Pursuant to the terms of the Merger Agreement, each outstanding RSU that was outstanding and unvested immediately prior to the Effective Time vested in full. At the Effective Time, each RSU then outstanding was cancelled and converted into a cash payment equal to the product of (A) the total number of Shares then underlying such RSU multiplied by (B) the Offer Amount, without interest and subject to any withholding of taxes.

F3: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

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.”

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
September 22, 2026 Filed Sep 24, 2026 20:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 3.9978 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-063417 · wk-form4_1790282318.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,619.5144

Underlying: Common Stock · 3.9978 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
July 30, 2026 Filed Jul 31, 2026 20:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GiftCommon Stock 100 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-051439 · wk-form4_1785530280.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,681

Read SEC document
June 23, 2026 Filed Jun 25, 2026 20:39 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 2.5166 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-045556 · wk-form4_1782419941.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,615.5166

Underlying: Common Stock · 2.5166 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
June 12, 2026 Filed Jun 16, 2026 20:35 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionDirector Stock Option (Right-to-Buy) · Derivative 5,000 $0.00 Strike: $19.39 $0.00
Disclosure

SEC source: 0001628280-26-043569 · wk-form4_1781642143.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 5,000 shares

Expires 2031-05-18

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_date: This stock option to acquire 20,000 shares of Common Stock of Amkor Technology, Inc. was granted on May 18, 2021 and vested in full on May 17, 2022.

Read SEC document
June 12, 2026 Filed Jun 16, 2026 20:35 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 5,000 $78.20 $391,000.00
Disclosure

SEC source: 0001628280-26-043569 · wk-form4_1781642143.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,781

Read SEC document
June 12, 2026 Filed Jun 16, 2026 20:35 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 5,000 $19.39 $96,950.00
Disclosure

SEC source: 0001628280-26-043569 · wk-form4_1781642143.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,781

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
May 13, 2026 Filed May 15, 2026 20:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 2,613 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-035661 · wk-form4_1778877531.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,613

Underlying: Common Stock · 2,613 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents shares of common stock underlying RSUs granted on May 13, 2026 (the "Grant Date") pursuant to the Plan (the "2026 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.exercise_date: Represents shares of common stock underlying RSUs granted on May 13, 2026 (the "Grant Date") pursuant to the Plan (the "2026 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.expiration_date: Represents shares of common stock underlying RSUs granted on May 13, 2026 (the "Grant Date") pursuant to the Plan (the "2026 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Read SEC document
May 13, 2026 Filed May 15, 2026 20:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 9,893.0573 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-035661 · wk-form4_1778877531.xml · derivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,893.0573 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: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.exercise_date: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.expiration_date: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

Read SEC document
May 13, 2026 Filed May 15, 2026 20:38 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 9,893 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-035661 · wk-form4_1778877531.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,781

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 · shares: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · price: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · balance_after: On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.

Read SEC document
May 05, 2026 Filed May 7, 2026 20:35 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 7,000 $76.45 $535,150.00
Disclosure

SEC source: 0001628280-26-032234 · wk-form4_1778186145.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,888

Read SEC document
March 31, 2026 Filed Apr 2, 2026 22:52 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 18.1563 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-023385 · wk-form4_1775170319.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,893.0573

Underlying: Common Stock · 18.1563 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
December 23, 2025 Filed Dec 29, 2025 13:27 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 20.0093 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-058870 · wk-form4_1767014854.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,874.901

Underlying: Common Stock · 20.0093 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
December 15, 2025 Filed Dec 17, 2025 21:09 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionDirector Stock Option (Right-to-Buy) · Derivative 5,000 $0.00 Strike: $19.39 $0.00
Disclosure

SEC source: 0001628280-25-057639 · wk-form4_1766005784.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Common Stock · 5,000 shares

Expires 2031-05-18

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_date: This stock option to acquire 20,000 shares of Common Stock of Amkor Technology, Inc. was granted on May 18, 2021 and vested in full on May 17, 2022.

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December 15, 2025 Filed Dec 17, 2025 21:09 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 5,000 $44.29 $221,450.00
Disclosure

SEC source: 0001628280-25-057639 · wk-form4_1766005784.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,888

Read SEC document
December 15, 2025 Filed Dec 17, 2025 21:09 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 5,000 $19.39 $96,950.00
Disclosure

SEC source: 0001628280-25-057639 · wk-form4_1766005784.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,888

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
September 23, 2025 Filed Sep 25, 2025 20:41 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 27.3648 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-042825 · wk-form4_1758832876.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,854.8917

Underlying: Common Stock · 27.3648 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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June 25, 2025 Filed Jun 27, 2025 21:58 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 38.5269 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000146 · wk-form4_1751061479.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,827.5269

Underlying: Common Stock · 38.5269 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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May 15, 2025 Filed May 16, 2025 20:37 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 9,789 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000107 · wk-form4_1747427808.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,789

Underlying: Common Stock · 9,789 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents shares of common stock underlying RSUs granted on May 15, 2025 (the "Grant Date") pursuant to the Plan (the "2025 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2025 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2025 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.exercise_date: Represents shares of common stock underlying RSUs granted on May 15, 2025 (the "Grant Date") pursuant to the Plan (the "2025 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2025 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2025 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.expiration_date: Represents shares of common stock underlying RSUs granted on May 15, 2025 (the "Grant Date") pursuant to the Plan (the "2025 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2025 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2025 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

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May 14, 2025 Filed May 16, 2025 20:37 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 6,017.0342 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000107 · wk-form4_1747427808.xml · derivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,017.0342 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: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · shares: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.exercise_date: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.expiration_date: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.underlying_shares: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

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May 14, 2025 Filed May 16, 2025 20:37 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 6,017 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000107 · wk-form4_1747427808.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,888

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 · shares: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · price: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · balance_after: On May 14, 2024, the Reporting Person was granted 5,855 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2024 RSUs"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis.

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April 02, 2025 Filed Apr 4, 2025 20:14 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 25.9877 $0.00 $0.00
Disclosure

SEC source: 0001047127-25-000072 · wk-form4_1743797684.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,017.0342

Underlying: Common Stock · 25.9877 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
December 23, 2024 Filed Dec 26, 2024 17:47 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 108.7979 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000225 · wk-form4_1735235242.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,991.0465

Underlying: Common Stock · 108.7979 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
September 23, 2024 Filed Sep 25, 2024 20:39 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 14.864 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000183 · wk-form4_1727296740.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
August 27, 2024 Filed Aug 29, 2024 20:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionDirector Stock Option (Right-to-Buy) · Derivative 20,000 $0.00 Strike: $11.71 $0.00
Disclosure

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2027-05-02

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_date: This stock option to acquire 20,000 shares of the Issuer's common stock was granted on May 2, 2017 and vested in full on May 1, 2018.

Read SEC document
August 27, 2024 Filed Aug 29, 2024 20:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 20,000 $32.97 $659,400.00
Disclosure

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,871

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.96 to $33.01. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

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August 27, 2024 Filed Aug 29, 2024 20:33 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 20,000 $11.71 $234,200.00
Disclosure

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,871

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
June 24, 2024 Filed Jun 26, 2024 21:50 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 12.3846 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000145 · wk-form4_1719438605.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,867.3846

Underlying: Common Stock · 12.3846 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Read SEC document
May 14, 2024 Filed May 16, 2024 22:26 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 5,855 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000108 · wk-form4_1715898376.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,855

Underlying: Common Stock · 5,855 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents shares of common stock underlying RSUs granted on May 14, 2024 (the "Grant Date") pursuant to the Plan (the "2024 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2024 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2024 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.exercise_date: Represents shares of common stock underlying RSUs granted on May 14, 2024 (the "Grant Date") pursuant to the Plan (the "2024 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2024 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2024 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.expiration_date: Represents shares of common stock underlying RSUs granted on May 14, 2024 (the "Grant Date") pursuant to the Plan (the "2024 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2024 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2024 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Read SEC document
May 14, 2024 Filed May 16, 2024 22:26 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 8,571.0421 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000108 · wk-form4_1715898376.xml · derivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,571.0421 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: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · shares: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.exercise_date: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.expiration_date: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.underlying_shares: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

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May 14, 2024 Filed May 16, 2024 22:26 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionCommon Stock 8,571 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000108 · wk-form4_1715898376.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,871

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 · shares: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · price: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · balance_after: On May 16, 2023, the Reporting Person was granted 8,478 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2023 RSUs"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into common stock of the Issuer on a one-for-one basis.

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April 08, 2024 Filed Apr 9, 2024 01:27 UTC Societal CDMO, Inc. SCTL · Entity 92137 Disposition to issuerStock Option (Right to Buy) · Derivative 27,229 Not disclosed Strike: $0.74 Not disclosed
Disclosure

SEC source: 0001104659-24-044890 · tm2411350-3_4seq1.xml · derivative · entry 4

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 27,229 shares

Expires not disclosed

F3 · price: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

F3 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

F3 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

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April 08, 2024 Filed Apr 9, 2024 01:27 UTC Societal CDMO, Inc. SCTL · Entity 92137 Disposition to issuerStock Option (Right to Buy) · Derivative 118,182 Not disclosed Strike: $0.80 Not disclosed
Disclosure

SEC source: 0001104659-24-044890 · tm2411350-3_4seq1.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 118,182 shares

Expires not disclosed

F3 · price: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

F3 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

F3 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding and unvested option to purchase Shares granted under an Issuer equity plan (each, an "Issuer Stock Option") vested in full. At the Effective Time, each Issuer Stock Option with an exercise price that is less than the Offer Amount was cancelled and converted into the right to receive a cash payment equal to the product of (A) the excess, if any, of the Offer Amount over the exercise price payable per Share with respect to such Issuer Stock Option, multiplied by (B) the total number of Shares subject to such Issuer Stock Option immediately prior to the Effective Time.

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April 08, 2024 Filed Apr 9, 2024 01:27 UTC Societal CDMO, Inc. SCTL · Entity 92137 Disposition to issuerCommon Stock 73,620 $1.10 $80,982.00
Disclosure

SEC source: 0001104659-24-044890 · tm2411350-3_4seq1.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F2 · shares: Represents restricted stock units granted under an Issuer equity plan ("RSUs") granted to the Reporting Person. Each RSU represented a contingent right to receive one Share upon vesting of the RSU. Pursuant to the terms of the Merger Agreement, each outstanding RSU that was outstanding and unvested immediately prior to the Effective Time vested in full. At the Effective Time, each RSU then outstanding was cancelled and converted into a cash payment equal to the product of (A) the total number of Shares then underlying such RSU multiplied by (B) the Offer Amount, without interest and subject to any withholding of taxes.

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April 08, 2024 Filed Apr 9, 2024 01:27 UTC Societal CDMO, Inc. SCTL · Entity 92137 OtherCommon Stock 227,982 $1.10 $250,780.20
Disclosure

SEC source: 0001104659-24-044890 · tm2411350-3_4seq1.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,620

F1 · shares: Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), dated as of February 28, 2024, by and among the Issuer, CoreRx, Inc., a Florida corporation ("Parent") and Cane Merger Sub, Inc., a Pennsylvania corporation and a wholly owned Subsidiary of Parent ("Merger Sub"), Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share") and thereafter merged with and into the Issuer, effective as of April 8, 2024 (the "Effective Time") with the Issuer surviving the merger. At the Effective Time, each issued and outstanding Share was cancelled and converted into the right to receive $1.10 per Share in cash (the "Offer Amount"), subject to any applicable withholding taxes and without interest.

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April 01, 2024 Filed Apr 3, 2024 22:11 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 20.9884 $0.00 $0.00
Disclosure

SEC source: 0001047127-24-000071 · wk-form4_1712182296.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,571.0421

Underlying: Common Stock · 20.9884 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on April 1, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on April 1, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on April 1, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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March 07, 2024 Filed Mar 8, 2024 21:12 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 SaleCommon Stock 11,903 $36.20 $430,888.60
Disclosure

SEC source: 0001047127-24-000059 · wk-form4_1709932335.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,300

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.18 to $36.28. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

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December 26, 2023 Filed Dec 27, 2023 21:37 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 19.5331 $0.00 $0.00
Disclosure

SEC source: 0001047127-23-000070 · wk-form4_1703713027.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,550.0537

Underlying: Common Stock · 19.5331 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on December 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on December 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on December 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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September 25, 2023 Filed Sep 27, 2023 21:05 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 28.3988 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-050667 · doc4.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,530.5206

Underlying: Common Stock · 28.3988 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · shares: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.underlying_shares: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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August 28, 2023 Filed Aug 28, 2023 20:30 UTC Societal CDMO, Inc. SCTL · Entity 92137 PurchaseCommon Stock 62,500 $0.40 $25,000.00
Disclosure

SEC source: 0001062993-23-017161 · form4.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 301,602

F1 · kind: Represents shares acquired pursuant to an underwritten public offering of common stock by the Issuer.

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June 26, 2023 Filed Jun 28, 2023 22:32 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 24.1218 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-040078 · doc4.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,502.1218

Underlying: Common Stock · 24.1218 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · shares: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.underlying_shares: Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

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June 13, 2023 Filed Jun 14, 2023 19:53 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 3,499 $6.90 $24,143.10
Disclosure

SEC source: 0001104659-23-071168 · tm2317987-2_4seq1.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,523

Read SEC document
June 06, 2023 Filed Jun 6, 2023 23:34 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 14 $6.90 $96.60
Disclosure

SEC source: 0001104659-23-068625 · tm2317987-1_4seq1.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,022

Read SEC document
June 05, 2023 Filed Jun 6, 2023 23:34 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 1,556 $6.90 $10,736.40
Disclosure

SEC source: 0001104659-23-068625 · tm2317987-1_4seq1.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,036

Read SEC document
May 19, 2023 Filed May 31, 2023 01:40 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 900 $7.00 $6,303.60
Disclosure

SEC source: 0001104659-23-066234 · tm2317189-2_4seq1.xml · nonDerivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,592

Read SEC document
May 18, 2023 Filed May 31, 2023 01:40 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 80 $7.00 $560.00
Disclosure

SEC source: 0001104659-23-066234 · tm2317189-2_4seq1.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,492

Read SEC document
May 17, 2023 Filed May 19, 2023 20:57 UTC Societal CDMO, Inc. SCTL · Entity 92137 GrantStock Option (right to buy) · Derivative 27,229 $0.00 Strike: $0.74 $0.00
Disclosure

SEC source: 0001062993-23-011847 · form4.xml · derivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,229

Underlying: Common Stock · 27,229 shares

Expires 2033-05-17

F2 · derivative.exercise_date: The stock option will vest in full on May 17, 2024, subject to continued service with the Company.

Read SEC document
May 17, 2023 Filed May 19, 2023 20:57 UTC Societal CDMO, Inc. SCTL · Entity 92137 GrantCommon Stock 73,620 Not disclosed Not disclosed
Disclosure

SEC source: 0001062993-23-011847 · form4.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 239,102

F1 · price: These restricted stock units will vest in full on May 17, 2024, subject to continued service with the Company. Restricted stock units convert into common stock on a one-for-one basis.

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May 17, 2023 Filed May 31, 2023 01:40 UTC INNOVATIVE SOLUTIONS & SUPPORT INC ISSC · Entity 544 SaleCommon Stock 300 $7.00 $2,100.00
Disclosure

SEC source: 0001104659-23-066234 · tm2317189-2_4seq1.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Former Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,572

Read SEC document
May 16, 2023 Filed May 19, 2023 00:06 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 GrantRestricted Stock Units · Derivative 8,478 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-030833 · doc4.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,478

Underlying: Common Stock · 8,478 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents shares of common stock underlying RSUs granted on May 16, 2023 (the "Grant Date") pursuant to the Plan (the "2023 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2023 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2023 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.exercise_date: Represents shares of common stock underlying RSUs granted on May 16, 2023 (the "Grant Date") pursuant to the Plan (the "2023 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2023 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2023 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

F2 · derivative.expiration_date: Represents shares of common stock underlying RSUs granted on May 16, 2023 (the "Grant Date") pursuant to the Plan (the "2023 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2023 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2023 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Read SEC document
May 16, 2023 Filed May 19, 2023 00:06 UTC AMKOR TECHNOLOGY, INC. AMKR · Entity 3481 Exercise / conversionRestricted Stock Units · Derivative 8,809.4075 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-030833 · doc4.xml · derivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,809.4075 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: On May 17, 2022, the Reporting Person was granted 8,706 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2022 RSUs"). In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · shares: On May 17, 2022, the Reporting Person was granted 8,706 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2022 RSUs"). In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.exercise_date: On May 17, 2022, the Reporting Person was granted 8,706 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2022 RSUs"). In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.expiration_date: On May 17, 2022, the Reporting Person was granted 8,706 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2022 RSUs"). In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis.

F1 · derivative.underlying_shares: On May 17, 2022, the Reporting Person was granted 8,706 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2022 RSUs"). In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis.

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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.