WAT

SEC source: 0001000697-26-000044 · form4.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,108.393

F1 · shares: Represents performance-based restricted stock units ("PSUs") originally granted on February 8, 2023, subject to pre-determined service and performance-based vesting requirements. The level of achievement of the performance-based vesting requirement for the PSUs was certified by the Issuer's Compensation Committee on February 4, 2026, and the PSUs will vest in full upon satisfaction of the service-based vesting requirement on March 1, 2026. The PSUs are convertible into shares of the Issuer's Common Stock on a one-to-one basis upon vesting and settlement.

SEC source: 0001000697-26-000042 · form4.xml · nonDerivative · entry 1

Batra Udit · CIK 0001821498 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,610

F1 · shares: Represents performance-based restricted stock units ("PSUs") originally granted on February 8, 2023, subject to predetermined service and performance-based vesting requirements. The leve of achievement of the performance-based vesting requirements for the PSUs was satisfied upon the certification by the Issuer's Compensation Committee on February 4, 2026, and the PSUs will vest in full upon satisfaction of the service-based vesting requirement on March 1, 2026. The PSUs are convertible into shares of the Issuer's Common Stock on a one-to-one basis upon vesting and settlement.

SEC source: 0001000697-26-000032 · form4.xml · derivative · entry 2

Vergnano Mark · CIK 0001474107 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000032 · form4.xml · nonDerivative · entry 1

Vergnano Mark · CIK 0001474107 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,517

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000030 · form4.xml · derivative · entry 2

KUEBLER CHRISTOPHER A · CIK 0001229877 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000030 · form4.xml · nonDerivative · entry 1

KUEBLER CHRISTOPHER A · CIK 0001229877 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,785

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000027 · form4.xml · derivative · entry 2

Huang Pearl S · CIK 0001837486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000027 · form4.xml · nonDerivative · entry 1

Huang Pearl S · CIK 0001837486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,253.3

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000025 · form4.xml · derivative · entry 2

FEARON RICHARD H · CIK 0001188586 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000025 · form4.xml · nonDerivative · entry 1

FEARON RICHARD H · CIK 0001188586 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,279

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000023 · form4.xml · derivative · entry 2

Brennan Daniel J. · CIK 0001595612 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000023 · form4.xml · nonDerivative · entry 1

Brennan Daniel J. · CIK 0001595612 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,332

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000021 · form4.xml · derivative · entry 2

BADDOUR LINDA · CIK 0001181151 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000021 · form4.xml · nonDerivative · entry 1

BADDOUR LINDA · CIK 0001181151 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,876

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000019 · form4.xml · derivative · entry 2

Ornskov Flemming · CIK 0001709473 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F2 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000019 · form4.xml · nonDerivative · entry 1

Ornskov Flemming · CIK 0001709473 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,935

F1 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000014 · form4.xml · derivative · entry 3

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F3 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000014 · form4.xml · nonDerivative · entry 2

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,918.27

F2 · shares: Represents shares of common stock subject to restrictions that will lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000012 · form4.xml · derivative · entry 3

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 828

Underlying: Common Stock · 828 shares

Expires 2036-01-02

F3 · shares: All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.

SEC source: 0001000697-26-000012 · form4.xml · nonDerivative · entry 2

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,126.07

F2 · shares: Represents shares of common stock subject to restrictions that lapse with respect to 100% of the shares on January 2, 2027.

SEC source: 0001000697-26-000014 · form4.xml · nonDerivative · entry 1

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,611.27

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2035, pursuant to an election previously made by the Reporting Person.

SEC source: 0001000697-26-000012 · form4.xml · nonDerivative · entry 1

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 819.07

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2027, pursuant to an election previously made by the Reporting Person.

SEC source: 0001000697-25-000013 · form4.xml · derivative · entry 3

KUEBLER CHRISTOPHER A · CIK 0001229877 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,761 shares

Expires 2026-01-04

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: 0001000697-25-000013 · form4.xml · nonDerivative · entry 2

KUEBLER CHRISTOPHER A · CIK 0001229877 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,478

F1 · kind: The reported transaction is not a sale but represents the withholding of shares by the Issuer to cover payment of the exercise price in connection with the reported exercise of a stock option by the Reporting Person prior to the expiration of such stock option.

SEC source: 0001000697-25-000013 · form4.xml · nonDerivative · entry 1

KUEBLER CHRISTOPHER A · CIK 0001229877 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,796

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: 0001000697-25-000008 · form4.xml · nonDerivative · entry 1

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 759.28

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2027, pursuant to an election previously made by the Reporting Person.

SEC source: 0001000697-25-000007 · form4.xml · nonDerivative · entry 1

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,551.48

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2035, pursuant to an election previously made by the Reporting Person.

SEC source: 0001127602-25-018412 · form4.xml · nonDerivative · entry 1

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 681.4

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2027, pursuant to an election previously made by the Reporting Person.

SEC source: 0001127602-25-018410 · form4.xml · nonDerivative · entry 1

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,478.57

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2035, pursuant to an election previously made by the Reporting Person.

SEC source: 0001127602-25-018086 · form4.xml · nonDerivative · entry 1

Carpio Robert L III · CIK 0002027463 · SVP, Waters Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,656

F1 · shares: Represents shares of common stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported restricted stock units.

SEC source: 0001127602-25-014345 · form4.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,224.393

F1 · shares: Represents shares of common stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported restricted stock units.

F2 · balance_after: Includes 27.0112 shares of common stock acquired on June 28, 2024 and 67.8868 shares of common stock acquired on March 31, 2025, in each case pursuant to the Waters Corporation 2009 Employee Stock Purchase Plan (the "ESPP"), in transactions that were exempt pursuant to Rule 16b-3(c).

SEC source: 0001127602-25-011828 · form4.xml · nonDerivative · entry 1

Bennett Jianqing · CIK 0001856691 · SVP TA Instruments Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,916

F1 · shares: Represents shares of common stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported restricted stock units.

SEC source: 0001127602-25-011182 · form4.xml · nonDerivative · entry 1

Jiang Wei · CIK 0001867980 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,410.22

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2035, pursuant to an election previously made by the Reporting Person.

SEC source: 0001127602-25-011180 · form4.xml · nonDerivative · entry 1

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 613.05

F1 · shares: Represents common stock units received in lieu of cash payment of director fees pursuant to the Issuer's 1996 Non-Employee Director Deferred Compensation Plan. Common stock units are convertible into shares of the Issuer's common stock on a one-for-one basis upon distribution, which will occur on January 1, 2027, pursuant to an election previously made by the Reporting Person.

SEC source: 0001127602-25-008009 · form4.xml · nonDerivative · entry 1

Bennett Jianqing · CIK 0001856691 · SVP TA Instruments Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,219

F1 · shares: Represents shares of common stock withheld by the issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported performance stock units.

SEC source: 0001127602-25-008005 · form4.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,368.495

F1 · shares: Represents shares of common stock withheld by the issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported performance stock units.

SEC source: 0001127602-25-007999 · form4.xml · nonDerivative · entry 1

Batra Udit · CIK 0001821498 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,544

F1 · shares: Represents shares of common stock withheld by the issuer to satisfy tax withholding obligations in connection with the vesting and settlement of previously reported performance stock units.

SEC source: 0001127602-25-003604 · form4.xml · derivative · entry 3

Batra Udit · CIK 0001821498 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,640

Underlying: Common Stock · 18,640 shares

Expires 2035-02-05

F3 · derivative.exercise_date: Options vest 20% per annum for a five-year period beginning February 5, 2026.

SEC source: 0001127602-25-003604 · form4.xml · nonDerivative · entry 2

Batra Udit · CIK 0001821498 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,520

F2 · shares: Represents shares of Restricted Stock Units that will vest 20% per annum for a five-year period beginning February 5, 2026.

SEC source: 0001127602-25-003604 · form4.xml · nonDerivative · entry 1

Batra Udit · CIK 0001821498 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,898

F1 · shares: Represents earned performance shares with respect to a performance stock unit award originally granted on February 25, 2022, that contained performance-vesting requirements. The issuer's compensation committee certified as to the level of performance-goal attainment on February 5, 2025, and the shares will service vest on March 1, 2025.

SEC source: 0001127602-25-003601 · form4.xml · derivative · entry 3

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,287

Underlying: Common Stock · 4,287 shares

Expires 2035-02-05

F3 · derivative.exercise_date: Options vest 20% per annum for a five-year period beginning February 5, 2026.

SEC source: 0001127602-25-003601 · form4.xml · nonDerivative · entry 2

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,444.495

F2 · shares: Represents shares of restricted stock that will vest 20% per annum for a 5 year period beginning February 5, 2026.

SEC source: 0001127602-25-003601 · form4.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · SVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,611.495

F1 · shares: Represents earned performance shares with respect to a performance stock unit award originally granted on February 25, 2022, that contained performance-vesting requirements. The issuer's compensation committee certified as to the level of performance-goal attainment on February 5, 2025, and the shares will service vest on March 1, 2025.

SEC source: 0001127602-25-003597 · form4.xml · derivative · entry 2

Carpio Robert L III · CIK 0002027463 · SVP, Waters Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,796

Underlying: Common Stock · 2,796 shares

Expires 2035-02-05

F3 · derivative.exercise_date: Options vest 20% per annum for a five year period beginning February 5, 2026.

SEC source: 0001127602-25-003597 · form4.xml · nonDerivative · entry 1

Carpio Robert L III · CIK 0002027463 · SVP, Waters Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,790

F1 · shares: Represents shares of Restricted Stock Units that will vest 20% per annum for a five-year period beginning February 5, 2026.

F2 · balance_after: The total shown in this column reflects an update to correct a previous administrative error in the amount of securities beneficially owned by the reporting person.

SEC source: 0001127602-25-003599 · form4.xml · derivative · entry 3

Bennett Jianqing · CIK 0001856691 · SVP TA Instruments Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,168

Underlying: Common Stock · 3,168 shares

Expires 2035-02-05

F3 · derivative.exercise_date: Options vest 20% per annum for a five-year period beginning February 5, 2026.

SEC source: 0001127602-25-003599 · form4.xml · nonDerivative · entry 2

Bennett Jianqing · CIK 0001856691 · SVP TA Instruments Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,005

F2 · shares: Represents shares of restricted stock that will vest 20% per annum for a 5 year period beginning February 5, 2026.

SEC source: 0001127602-25-003599 · form4.xml · nonDerivative · entry 1

Bennett Jianqing · CIK 0001856691 · SVP TA Instruments Division

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,390

F1 · shares: Represents earned performance shares with respect to a performance stock unit award originally granted on February 25, 2022, that contained performance-vesting requirements. The issuer's compensation committee certified as to the level of performance-goal attainment on February 5, 2025, and the shares will service vest on March 1, 2025.

SEC source: 0001127602-25-000653 · form4.xml · derivative · entry 2

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 818

Underlying: Common Stock · 818 shares

Expires 2035-01-02

F2 · shares: Options vest in full on January 2, 2026.

SEC source: 0001127602-25-000653 · form4.xml · nonDerivative · entry 1

Knight Heather · CIK 0001967528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 560.1

F1 · shares: Represents shares of restricted stock which will vest in full on January 2, 2026.