ENTG

SEC source: 0001597133-26-000002 · wk-form4_1787160280.xml · nonDerivative · entry 1

Reeder David · CIK 0001597133 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,821

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

SEC source: 0001891661-26-000002 · wk-form4_1786982437.xml · derivative · entry 3

Blachier Olivier · CIK 0001891661 · President, Materials Solutions

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,972

Underlying: Common Stock · 2,000 shares

Expires 2030-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: This option vests in four equal annual installments. The first three installments became exercisable on February 19, 2024, February 19, 2025, and February 19, 2026, respectively. The final installment will become exercisable on February 19, 2027.

SEC source: 0001891661-26-000002 · wk-form4_1786982437.xml · nonDerivative · entry 2

Blachier Olivier · CIK 0001891661 · President, Materials Solutions

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,996.76

F2 · shares: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on May 14, 2026.

SEC source: 0001891661-26-000002 · wk-form4_1786982437.xml · nonDerivative · entry 1

Blachier Olivier · CIK 0001891661 · President, Materials Solutions

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,996.76

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 · balance_after: These shares include 99.81 shares acquired by the Reporting Person under the Entegris, Inc. Employee Stock Purchase Plan on June 30, 2026.

SEC source: 0001811061-26-000002 · wk-form4_1786730610.xml · derivative · entry 3

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,916 shares

Expires 2028-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: The option is fully vested.

SEC source: 0001811061-26-000002 · wk-form4_1786730610.xml · nonDerivative · entry 2

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,296.89

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $164.29 to $164.66, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001811061-26-000002 · wk-form4_1786730610.xml · nonDerivative · entry 1

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,212.89

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 · balance_after: These shares include 175.44 shares acquired under the Entegris, Inc. Employee Stock Purchase Plan on June 30, 2026.

SEC source: 0001101302-26-000152 · wk-form4_1786555778.xml · nonDerivative · entry 1

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,976.004

SEC source: 0001140842-26-000004 · wk-form4_1785861254.xml · nonDerivative · entry 1

BRUGGEWORTH ROBERT A · CIK 0001140842 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,329

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on August 3, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000136 · wk-form4_1780590965.xml · nonDerivative · entry 1

LEDERER JAMES P · CIK 0001434807 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,277

SEC source: 0001101302-26-000131 · wk-form4_1779983715.xml · derivative · entry 3

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,848 shares

Expires 2028-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F2 · derivative.exercise_date: This option is fully vested.

SEC source: 0001101302-26-000131 · wk-form4_1779983715.xml · nonDerivative · entry 2

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 54,960.67

F1 · kind: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 13, 2026.

SEC source: 0001101302-26-000131 · wk-form4_1779983715.xml · nonDerivative · entry 1

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,808.67

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: 0001101302-26-000129 · wk-form4_1779216671.xml · nonDerivative · entry 1

Nagesh Sukhi · CIK 0001643488 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,254

F1 · shares: Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest as follows: 25% of the RSUs vest on May 18, 2027, and the remaining 75% of the RSUs vest in equal quarterly installments over the three year period thereafter.

F2 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

SEC source: 0001101302-26-000124 · wk-form4_1779127963.xml · derivative · entry 4

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 12,960 shares

Expires 2027-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: The option is fully vested.

SEC source: 0001101302-26-000124 · wk-form4_1779127963.xml · nonDerivative · entry 3

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,038.004

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $132.71 to $132.96, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001101302-26-000124 · wk-form4_1779127963.xml · nonDerivative · entry 2

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,998.004

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: 0001101302-26-000124 · wk-form4_1779127963.xml · nonDerivative · entry 1

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,038.004

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $133.01 to $133.05, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001101302-26-000122 · wk-form4_1779127910.xml · derivative · entry 3

Blachier Olivier · CIK 0001891661 · SVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,972

Underlying: Common Stock · 2,000 shares

Expires 2030-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F2 · derivative.exercise_date: This option vests in four equal annual installments. The first three installments became exercisable on February 19, 2024, February 19, 2025, and February 19, 2026, respectively. The final installment will become exercisable on February 19, 2027.

SEC source: 0001101302-26-000122 · wk-form4_1779127910.xml · nonDerivative · entry 2

Blachier Olivier · CIK 0001891661 · SVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,896.95

F1 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $140.00 to $140.18, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001101302-26-000122 · wk-form4_1779127910.xml · nonDerivative · entry 1

Blachier Olivier · CIK 0001891661 · SVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,896.95

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: 0001101302-26-000121 · wk-form4_1779127900.xml · derivative · entry 6

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,442

Underlying: Common Stock · 2,410 shares

Expires 2030-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: This option vests in four equal installments. The first three installments became exercisable on February 19, 2024, February 19, 2025, and February 19, 2026, respectively. The final installment will become exercisable on February 19, 2027.

SEC source: 0001101302-26-000121 · wk-form4_1779127900.xml · derivative · entry 5

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,916

Underlying: Common Stock · 3,916 shares

Expires 2028-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F1 · derivative.exercise_date: The option is fully vested.

SEC source: 0001101302-26-000121 · wk-form4_1779127900.xml · nonDerivative · entry 4

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,121.45

SEC source: 0001101302-26-000121 · wk-form4_1779127900.xml · nonDerivative · entry 3

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,531.45

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: 0001101302-26-000121 · wk-form4_1779127900.xml · nonDerivative · entry 2

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,121.45

SEC source: 0001101302-26-000121 · wk-form4_1779127900.xml · nonDerivative · entry 1

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,037.45

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: 0001101302-26-000120 · wk-form4_1779127890.xml · derivative · entry 3

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,830 shares

Expires 2027-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F2 · derivative.exercise_date: This option is fully vested.

SEC source: 0001101302-26-000120 · wk-form4_1779127890.xml · nonDerivative · entry 2

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 54,960.67

F1 · kind: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 13, 2026.

SEC source: 0001101302-26-000120 · wk-form4_1779127890.xml · nonDerivative · entry 1

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 60,790.67

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: 0001101302-26-000114 · wk-form4_1778259322.xml · nonDerivative · entry 1

SALEKI-GERHARDT AZITA · CIK 0001563545 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,383

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000112 · wk-form4_1778259307.xml · nonDerivative · entry 1

GENTILCORE JAMES · CIK 0001217378 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,919

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000113 · wk-form4_1778259315.xml · nonDerivative · entry 1

LEDERER JAMES P · CIK 0001434807 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,846

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000110 · wk-form4_1778259283.xml · nonDerivative · entry 1

Clark Rodney · CIK 0001846252 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,912

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000111 · wk-form4_1778259292.xml · nonDerivative · entry 1

PUMA MARY G · CIK 0001158015 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,516

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001101302-26-000109 · wk-form4_1778259270.xml · nonDerivative · entry 1

Kanouff Yvette · CIK 0001333214 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,533

F1 · shares: These Restricted Stock Units vest in full on the earlier of (1) the first anniversary date of the grant, or (2) the date of the Company's 2027 Annual Meeting of Stockholders.

F2 · price: These shares were awarded on May 6, 2026 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2020 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.

SEC source: 0001197452-26-000002 · wk-form4_1776700535.xml · derivative · entry 3

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 44,138 shares

Expires 2028-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: This option is fully vested.

SEC source: 0001197452-26-000002 · wk-form4_1776700535.xml · nonDerivative · entry 2

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,527

F1 · shares: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 10, 2025.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $140.00 to $146.46, inclusive. The Reporting Person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001197452-26-000002 · wk-form4_1776700535.xml · nonDerivative · entry 1

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 271,665

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: 0001101302-26-000097 · wk-form4_1776370562.xml · derivative · entry 3

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,138

Underlying: Common Stock · 17,396 shares

Expires 2028-02-19

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 · price: Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

F3 · derivative.exercise_date: This option is fully vested.

SEC source: 0001101302-26-000097 · wk-form4_1776370562.xml · nonDerivative · entry 2

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,527

F1 · shares: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 10, 2025.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $140.00 to $140.74, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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 this footnote.

SEC source: 0001101302-26-000097 · wk-form4_1776370562.xml · nonDerivative · entry 1

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 244,923

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: 0001101302-26-000092 · wk-form4_1775681137.xml · nonDerivative · entry 1

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,121.45

F1 · shares: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on August 8, 2025.

SEC source: 0001101302-26-000093 · wk-form4_1775681161.xml · nonDerivative · entry 1

Blachier Olivier · CIK 0001891661 · SVP, Chief Strategy Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,896.95

F1 · shares: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 21, 2025.

SEC source: 0001101302-26-000088 · wk-form4_1775505491.xml · nonDerivative · entry 1

Colella Joseph · CIK 0001811061 · SVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,713.45

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.

SEC source: 0001101302-26-000089 · wk-form4_1775505528.xml · nonDerivative · entry 1

LOY BERTRAND · CIK 0001197452 · Director · Executive Chair

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 227,527

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.

SEC source: 0001101302-26-000087 · wk-form4_1775505464.xml · nonDerivative · entry 1

Blachier Olivier · CIK 0001891661 · SVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,171.95

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.

SEC source: 0001101302-26-000086 · wk-form4_1775505438.xml · nonDerivative · entry 1

Haris Clinton M. · CIK 0001483553 · SVP & President, APS Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,960.67

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.

SEC source: 0001101302-26-000085 · wk-form4_1775505401.xml · nonDerivative · entry 1

Sauer Michael · CIK 0001552780 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000.707

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.

SEC source: 0001101302-26-000084 · wk-form4_1775505381.xml · nonDerivative · entry 1

Rice Susan G. · CIK 0001716139 · SVP, Global Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,971.004

F1 · shares: Shares automatically withheld upon settlement of restricted stock units to satisfy tax withholding obligations.

F2 · price: Because the shares vested on Sunday, April 5, the price stated above is the closing price per share of Entegris common stock on Thursday, April 2nd, the last trading day immediately prior to the vesting date.