CHEN FUSEN ERNIE

SEC source: 0001316245-25-000004 · wk-form4_1764028772.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,920 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: Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.

F1 · derivative.exercise_date: Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.

SEC source: 0001316245-25-000004 · wk-form4_1764028772.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,161,725

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: Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.

SEC source: 0001316245-25-000003 · wk-form4_1760553477.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 59,040 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: Performance Share Units (PSUs) awarded October 14, 2022, achieved a 82% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 14, 2025. Each PSU is convertible to one share of common stock.

F1 · derivative.exercise_date: Performance Share Units (PSUs) awarded October 14, 2022, achieved a 82% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 14, 2025. Each PSU is convertible to one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 14, 2022, achieved a 82% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 14, 2025. Each PSU is convertible to one share of common stock.

SEC source: 0001316245-25-000003 · wk-form4_1760553477.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,159,805

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: Performance Share Units (PSUs) awarded October 14, 2022, achieved a 82% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 14, 2025. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-24-000170 · wk-form4_1733531451.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,100,765

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.00 to $49.48, inclusive.

SEC source: 0000056978-24-000156 · wk-form4_1731974450.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,219 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: Performance Share Units (PSUs) awarded October 15, 2021, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 14, 2024. Each PSU is convertible into one share of common stock.

F1 · derivative.exercise_date: Performance Share Units (PSUs) awarded October 15, 2021, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 14, 2024. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 15, 2021, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 14, 2024. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-24-000156 · wk-form4_1731974450.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,180,765

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: Performance Share Units (PSUs) awarded October 15, 2021, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 14, 2024. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-24-000129 · wk-form4_1729294192.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,179,546

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-24-000121 · wk-form4_1729208731.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 43,444 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: Performance Share Units (PSUs) awarded October 15, 2021 achieved a 95% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 15, 2024. Each PSU is convertible to one share of common stock.

F1 · derivative.exercise_date: Performance Share Units (PSUs) awarded October 15, 2021 achieved a 95% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 15, 2024. Each PSU is convertible to one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 15, 2021 achieved a 95% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 15, 2024. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-24-000121 · wk-form4_1729208731.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,137,786

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: Performance Share Units (PSUs) awarded October 15, 2021 achieved a 95% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 15, 2024. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-24-000069 · wk-form4_1715987523.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,094,342

F1 · kind: Gift to Chenwu Foundation, a charitable foundation. The reporting person disclaims beneficial ownership of all shares of common stock held by the foundation.

SEC source: 0000056978-23-000184 · wk-form4_1700525908.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 54,962 shares

Expires not disclosed

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

F1 · derivative.exercise_date: Performance Share Units (PSUs) awarded October 7, 2020 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 16, 2023. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 7, 2020 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 16, 2023. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-23-000184 · wk-form4_1700525908.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,119,342

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: Performance Share Units (PSUs) awarded October 7, 2020 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 16, 2023. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-23-000159 · wk-form4_1697239844.xml · nonDerivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,064,380

F1 · kind: The sale of shares is for the sole purpose of covering the Reporting Person's tax liability associated with the vesting of performance stock units and restricted stock units over CY 2023.

F2 · shares: The shares covered by this Form 4 were sold pursuant to a Rule 10b5-1(c) sales plan dated February 21, 2023.

F4 · price: This transaction was executed in multiple trades at prices ranging from $46.31 to $47.49. The price reported above reflects the weighted average price.

SEC source: 0000056978-23-000159 · wk-form4_1697239844.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,094,380

F1 · kind: The sale of shares is for the sole purpose of covering the Reporting Person's tax liability associated with the vesting of performance stock units and restricted stock units over CY 2023.

F2 · shares: The shares covered by this Form 4 were sold pursuant to a Rule 10b5-1(c) sales plan dated February 21, 2023.

F3 · price: This transaction was executed in multiple trades at prices ranging from $46.69 to $47.77. The price reported above reflects the weighted average price.

SEC source: 0000056978-23-000147 · wk-form4_1697238703.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,124,380

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-23-000135 · wk-form4_1696981043.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 136,857 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_date: Performance Share Units (PSUs) awarded October 7, 2020, achieved a 166% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 7, 2023. Each PSU is convertible to one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 7, 2020, achieved a 166% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 7, 2023. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-23-000135 · wk-form4_1696981043.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,080,957

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: Performance Share Units (PSUs) awarded October 7, 2020, achieved a 166% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three year period. The pay-out was certified, and shares issued on October 7, 2023. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-22-000159 · wf-form4_167063127096097.xml · nonDerivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 944,100

F1 · kind: The sale of shares is for the sole purpose of covering the Reporting Person's tax liability associated with the vesting of performance stock units and restricted stock units over CY 2022.

F2 · shares: The shares covered by this Form 4 were sold pursuant to a Rule 10b5-1 trading plan dated September 12, 2022.

F4 · price: This transaction was executed in multiple trades at prices ranging from $46.09 to $47.95. The price reported above reflects the weighted average price.

SEC source: 0000056978-22-000159 · wf-form4_167063127096097.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 975,097

F1 · kind: The sale of shares is for the sole purpose of covering the Reporting Person's tax liability associated with the vesting of performance stock units and restricted stock units over CY 2022.

F2 · shares: The shares covered by this Form 4 were sold pursuant to a Rule 10b5-1 trading plan dated September 12, 2022.

F3 · price: This transaction was executed in multiple trades at prices ranging from $46.47 to $47.86. The price reported above reflects the weighted average price.

SEC source: 0000056978-22-000143 · wf-form4_166907687853228.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 55,556 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_date: Performance Share Units (PSUs) awarded October 10, 2019 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 17, 2022. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 10, 2019 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 17, 2022. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-22-000143 · wf-form4_166907687853228.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 999,656

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: Performance Share Units (PSUs) awarded October 10, 2019 achieved a 200% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified and the shares issued on November 17, 2022. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-22-000118 · wf-form4_166613466436124.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 944,100

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-22-000102 · wf-form4_166561630801233.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 114,999 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_date: Performance Share Units (PSUs) awarded October 10, 2019, achieved a 138% pay-out based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 10, 2022. Each PSU is convertible to one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 10, 2019, achieved a 138% pay-out based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 10, 2022. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-22-000102 · wf-form4_166561630801233.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 912,100

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: Performance Share Units (PSUs) awarded October 10, 2019, achieved a 138% pay-out based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 10, 2022. Each PSU is convertible to one share of common stock.

SEC source: 0000056978-21-000171 · wf-form4_163917361704555.xml · nonDerivative · entry 5

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 797,101

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.68 to $73.25, inclusive.

SEC source: 0000056978-21-000171 · wf-form4_163917361704555.xml · nonDerivative · entry 4

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 807,101

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.86 to $68.85, inclusive.

SEC source: 0000056978-21-000171 · wf-form4_163917361704555.xml · nonDerivative · entry 3

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 819,401

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.86 to $67.85, inclusive.

SEC source: 0000056978-21-000171 · wf-form4_163917361704555.xml · nonDerivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 832,101

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.86 to $66.85, inclusive.

SEC source: 0000056978-21-000171 · wf-form4_163917361704555.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 844,351

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.86 to $65.85, inclusive. The reporting person undertakes to provide to Kulicke and Soffa Industries, any security holder of Kulicke and Soffa Industries, 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 ranges set forth in footnote (1), (2), (3),(4), and (5) to this Form 4.

SEC source: 0000056978-21-000165 · wf-form4_163762750062302.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 60,000 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_date: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 200% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 18, 2021. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 200% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 18, 2021. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-21-000165 · wf-form4_163762750062302.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 857,101

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: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 200% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 18, 2021. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-21-000137 · wf-form4_163468447012495.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 797,101

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-21-000130 · wf-form4_163424932712989.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 131,400 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_date: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 146% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. The payout was certified and shares issued on October 12, 2021. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 146% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. The payout was certified and shares issued on October 12, 2021. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-21-000130 · wf-form4_163424932712989.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 776,776

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: Performance Share Units (PSUs) awarded October 12, 2018 achieved a 146% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. The payout was certified and shares issued on October 12, 2021. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-21-000074 · wf-form4_162344909598649.xml · nonDerivative · entry 3

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 645,376

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.82 to $56.58, inclusive.

SEC source: 0000056978-21-000074 · wf-form4_162344909598649.xml · nonDerivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 655,376

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.70 to $56.95, inclusive.

SEC source: 0000056978-21-000074 · wf-form4_162344909598649.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 678,947

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.70 to $56.69, inclusive. The reporting person undertakes to provide to Kulicke and Soffa Industries, any security holder of Kulicke and Soffa Industries, 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 ranges set forth in footnotes (1), (2), and (3) to this Form 4.

SEC source: 0000056978-20-000150 · wf-form4_160625160517258.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,060 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_date: Performance Share Units (PSUs) awarded November 7, 2017 achieved a 17% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 23, 2020. Each PSU is convertible into one share of common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded November 7, 2017 achieved a 17% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 23, 2020. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-20-000150 · wf-form4_160625160517258.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 695,376

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: Performance Share Units (PSUs) awarded November 7, 2017 achieved a 17% payout based on the greater of absolute revenue growth or relative revenue growth against two performance peers for each year of the three-year performance period. The payout was certified and the shares issued on November 23, 2020. Each PSU is convertible into one share of common stock.

SEC source: 0000056978-20-000132 · wf-form4_160501854996787.xml · derivative · entry 2

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 68,073 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_date: Performance Share Units (PSUs) awarded November 7, 2017 had its performance results certified, and then shares vested, on November 7, 2020 at 95% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded November 7, 2017 had its performance results certified, and then shares vested, on November 7, 2020 at 95% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-20-000132 · wf-form4_160501854996787.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 691,316

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: Performance Share Units (PSUs) awarded November 7, 2017 had its performance results certified, and then shares vested, on November 7, 2020 at 95% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-20-000116 · wf-form4_160225478778621.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 623,243

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-19-000113 · wf-form4_157288112632083.xml · derivative · entry 3

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 223,640 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_date: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on October 31, 2019 at 141% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period, with relative TSR measured over a three year measurement period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on October 31, 2019 at 141% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period, with relative TSR measured over a three year measurement period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-19-000113 · wf-form4_157288112632083.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 339,533

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: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on October 31, 2019 at 141% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period, with relative TSR measured over a three year measurement period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-19-000111 · wf-form4_157114764908246.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 115,893

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-18-000134 · wf-form4_153969370742510.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,470

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.

SEC source: 0000056978-18-000097 · wf-form4_153849839657162.xml · derivative · entry 3

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 48,376 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_date: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on September 29, 2018 at 183% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

F1 · derivative.expiration_date: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on September 29, 2018 at 183% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-18-000097 · wf-form4_153849839657162.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 115,470

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: Performance Share Units (PSUs) awarded October 31, 2016 had its performance results certified, and then shares vested, on September 29, 2018 at 183% achievement based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of Performance Period with relative TSR measured over a three year period. Each PSU is convertible into one share of Kulicke and Soffa Industries Inc. common stock.

SEC source: 0000056978-17-000115 · wf-form4_150712968654635.xml · nonDerivative · entry 1

CHEN FUSEN ERNIE · CIK 0001316245 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 84,717

F1 · shares: One-third of the shares granted vest on each anniversary of the date of grant.