(WAT)

Role: SVP & Chief Financial Officer
Signature: /s/ Michael Lynn, attorney-in-fact for Amol Chaubal
Issuer symbol: WAT
Transactions as of: 04 Feb 2026
Net transactions value: -$21,860
Form type: 4
Filing time: 06 Feb 2026, 19:32:21 UTC
Previous filing: 14 May 2025
Next filing: 27 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chaubal Amol	SVP & Chief Financial Officer	34 MAPLE STREET, MILFORD	/s/ Michael Lynn, attorney-in-fact for Amol Chaubal	06 Feb 2026	0001773089

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WAT	Common Stock	Award	$0	+1,884	+36%	$0.000000	7,108	04 Feb 2026	Direct	F1
transaction	WAT	Common Stock	Tax liability	$21,860	-58	-0.82%	$376.89	7,050	05 Feb 2026	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	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.

Content

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.

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.