IPGP

SEC source: 0001111928-24-000018 · wk-form4_1708550992.xml · nonDerivative · entry 1

Shcherbakov Eugene A · CIK 0001378544 · Director · CEO · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 98,638

F1 · price: Restricted stock units vesting in three annual installments of 33%, 33% and 34% on March 1, 2025, March 1, 2026 and March 1, 2027, respectively.

SEC source: 0001111928-24-000011 · wk-form4_1708463701.xml · derivative · entry 7

Shcherbakov Eugene A · CIK 0001378544 · Director · CEO · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,000

Underlying: Common Stock · 5,000 shares

Expires 2024-02-27

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.

F6 · derivative.exercise_date: Grant of stock options vesting in one installment on March 1, 2018.

SEC source: 0001111928-24-000011 · wk-form4_1708463701.xml · nonDerivative · entry 3

Shcherbakov Eugene A · CIK 0001378544 · Director · CEO · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,761

F3 · price: The reported transaction involves sale transactions ranging from $88.20 to $89.12 per share. The weighted average price per share was $88.58. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 10, 2023.

SEC source: 0001111928-24-000011 · wk-form4_1708463701.xml · nonDerivative · entry 2

Shcherbakov Eugene A · CIK 0001378544 · Director · CEO · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 73,211

F2 · price: The reported transaction involves sale transactions ranging from $87.20 to $88.18 per share. The weighted average price per share was $87.88. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 10, 2023.

SEC source: 0001111928-24-000011 · wk-form4_1708463701.xml · nonDerivative · entry 1

Shcherbakov Eugene A · CIK 0001378544 · Director · CEO · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 74,761

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.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · derivative · entry 7

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,358

Underlying: Common Stock · 629 shares

Expires 2024-06-02

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.

F4 · derivative.exercise_date: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · nonDerivative · entry 5

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,491

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · nonDerivative · entry 4

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,120

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.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · derivative · entry 6

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,987

Underlying: Common Stock · 813 shares

Expires 2024-06-02

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.

F4 · derivative.exercise_date: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · nonDerivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,491

F3 · price: The reported transaction involves sale transactions ranging from $100.00 to $100.01 per share. The weighted average price per share was $100.00. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · nonDerivative · entry 2

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,647

F2 · price: The reported transaction involves sale transactions ranging from $98.07 to $98.67 per share. The weighted average price per share was $98.36. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-24-000006 · wk-form4_1706735312.xml · nonDerivative · entry 1

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,304

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.

SEC source: 0001111928-24-000002 · wk-form4_1704316353.xml · derivative · entry 4

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,585

Underlying: Common Stock · 913 shares

Expires 2024-06-02

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.

F3 · derivative.exercise_date: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-24-000002 · wk-form4_1704316353.xml · nonDerivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,706

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-24-000002 · wk-form4_1704316353.xml · nonDerivative · entry 2

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,734

F2 · price: The reported transaction involves sale transactions ranging from $109.25 to $110.11 per share. The weighted average price per share was $109.61. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-24-000002 · wk-form4_1704316353.xml · nonDerivative · entry 1

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,619

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.

SEC source: 0001111928-23-000186 · wk-form4_1702329687.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,229,599

F3 · price: The reported transaction involves sale transactions ranging from $100.00 to $100.68 per share. The weighted average price per share was $100.24. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000186 · wk-form4_1702329687.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,230,726

F2 · price: The reported transaction involves sale transactions ranging from $99.00 to $99.99 per share. The weighted average price per share was $99.36. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000182 · wk-form4_1701810966.xml · nonDerivative · entry 2

Agnes Tang · CIK 0001919257 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,763

F3 · price: The reported transaction involves sale transactions ranging from $95.70 to $96.24 per share. The weighted average price per share was $95.95. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 15, 2023.

SEC source: 0001111928-23-000182 · wk-form4_1701810966.xml · nonDerivative · entry 1

Agnes Tang · CIK 0001919257 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,165

F2 · price: The reported transaction involves sale transactions ranging from $94.60 to $95.56 per share. The weighted average price per share was $95.08. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 15, 2023.

SEC source: 0001111928-23-000180 · wk-form4_1701465834.xml · derivative · entry 4

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,498

Underlying: Common Stock · 785 shares

Expires 2024-06-02

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.

F4 · derivative.exercise_date: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-23-000180 · wk-form4_1701465834.xml · nonDerivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,706

F3 · price: The reported transaction involves sale transactions ranging from $97.22 to $97.42 per share. The weighted average price per share was $97.31. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-23-000180 · wk-form4_1701465834.xml · nonDerivative · entry 2

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,102

F2 · price: The reported transaction involves sale transactions ranging from $96.09 to $97.06 per share. The weighted average price per share was $96.72. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-23-000180 · wk-form4_1701465834.xml · nonDerivative · entry 1

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,491

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.

SEC source: 0001111928-23-000178 · wk-form4_1701206958.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,237,849

F2 · price: The reported transaction involves sale transactions ranging from $94.93 to $95.78 per share. The weighted average price per share was $95.34. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000174 · wk-form4_1699914323.xml · nonDerivative · entry 3

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,246,099

F4 · price: The reported transaction involves sale transactions ranging from $92.73 to $92.94 per share. The weighted average price per share was $92.84. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000174 · wk-form4_1699914323.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,246,431

F3 · price: The reported transaction involves sale transactions ranging from $91.71 to $92.60 per share. The weighted average price per share was $92.01. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000174 · wk-form4_1699914323.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,249,297

F2 · price: The reported transaction involves sale transactions ranging from $90.71 to $91.70 per share. The weighted average price per share was $91.47. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000172 · wk-form4_1699391472.xml · derivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,283

Underlying: Common Stock · 785 shares

Expires 2024-06-02

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: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-23-000172 · wk-form4_1699391472.xml · nonDerivative · entry 2

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,706

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-23-000172 · wk-form4_1699391472.xml · nonDerivative · entry 1

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,491

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.

SEC source: 0001111928-23-000165 · wk-form4_1698351575.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,254,349

F3 · price: The reported transaction involves sale transactions ranging from $91.91 to $92.44 per share. The weighted average price per share was $92.20. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000165 · wk-form4_1698351575.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,257,668

F2 · price: The reported transaction involves sale transactions ranging from $90.91 to $91.90 per share. The weighted average price per share was $91.43. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000163 · wk-form4_1697057103.xml · nonDerivative · entry 3

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,262,599

F4 · price: The reported transaction involves sale transactions ranging from $96.34 to $96.44 per share. The weighted average price per share was $96.39. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000163 · wk-form4_1697057103.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,262,749

F3 · price: The reported transaction involves sale transactions ranging from $95.34 to $96.33 per share. The weighted average price per share was $95.80. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000163 · wk-form4_1697057103.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,268,252

F2 · price: The reported transaction involves sale transactions ranging from $94.33 to $95.32 per share. The weighted average price per share was $95.06. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000159 · wk-form4_1696364688.xml · derivative · entry 4

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,068

Underlying: Common Stock · 785 shares

Expires 2024-06-02

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.

F4 · derivative.exercise_date: Grant of stock options vesting in four equal annual installments on June 3, 2015, 2016, 2017 and 2018.

SEC source: 0001111928-23-000159 · wk-form4_1696364688.xml · nonDerivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,706

F3 · price: The reported transaction involves sale transactions ranging from $102.50 to $103.05 per share. The weighted average price per share was $102.72. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-23-000159 · wk-form4_1696364688.xml · nonDerivative · entry 2

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,799

F2 · price: The reported transaction involves sale transactions ranging from $101.50 to $102.49 per share. The weighted average price per share was $101.99. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.

SEC source: 0001111928-23-000159 · wk-form4_1696364688.xml · nonDerivative · entry 1

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,491

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.

SEC source: 0001111928-23-000157 · wk-form4_1695844965.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,270,849

F2 · price: The reported transaction involves sale transactions ranging from $99.61 to $100.52 per share. The weighted average price per share was $100.00. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000155 · wk-form4_1694550139.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,279,099

F3 · price: The reported transaction involves sale transactions ranging from $102.28 to $102.94 per share. The weighted average price per share was $102.51. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000155 · wk-form4_1694550139.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,280,870

F2 · price: The reported transaction involves sale transactions ranging from $101.28 to $102.27 per share. The weighted average price per share was $101.71. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000150 · wk-form4_1692994494.xml · nonDerivative · entry 3

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,287,349

F4 · price: The reported transaction involves sale transactions ranging from $103.77 to $104.02 per share. The weighted average price per share was $103.88. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000150 · wk-form4_1692994494.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,287,611

F3 · price: The reported transaction involves sale transactions ranging from $102.73 to $103.71 per share. The weighted average price per share was $103.24. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000150 · wk-form4_1692994494.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,289,994

F2 · price: The reported transaction involves sale transactions ranging from $101.73 to $102.72 per share. The weighted average price per share was $102.30. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000146 · wk-form4_1691698789.xml · nonDerivative · entry 2

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,295,599

F3 · price: The reported transaction involves sale transactions ranging from $109.77 to $110.22 per share. The weighted average price per share was $110.03. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000146 · wk-form4_1691698789.xml · nonDerivative · entry 1

Valentin Gapontsev Trust I · CIK 0001508155 · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,299,651

F2 · price: The reported transaction involves sale transactions ranging from $108.77 to $109.76 per share. The weighted average price per share was $109.47. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2022.

SEC source: 0001111928-23-000144 · wk-form4_1691439896.xml · nonDerivative · entry 1

KENNEDY KOLLEEN T · CIK 0001531738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,296

F1 · acquired: Grant of restricted stock units vesting in one installment on August 4, 2024.

SEC source: 0001111928-23-000138 · wk-form4_1691008403.xml · nonDerivative · entry 3

Meurice Eric · CIK 0001372258 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,706

F4 · price: The reported transaction involves sale transactions ranging from $132.86 to $132.96 per share. The weighted average price per share was $132.90. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F1 · acquired: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2023.