Wei Jiang - 31 Dec 2025 Form 4 Insider Report for WATERS CORP /DE/ (WAT)

Role: Director
Signature: /s/ Michael Lynn, attorney-in-fact for Wei Jiang
Issuer symbol: WAT
Transactions as of: 31 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 05 Jan 2026, 17:30:25 UTC
Previous filing: 14 Nov 2025
Next filing: 14 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Jiang Wei	Director	34 MAPLE STREET, MILFORD	/s/ Michael Lynn, attorney-in-fact for Wei Jiang	05 Jan 2026	0001867980

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WAT	Common Stock	Award	$0	+60	+2.3%	$0.000000	2,611	31 Dec 2025	Direct	F1
transaction	WAT	Common Stock	Award	$0	+307	+12%	$0.000000	2,918	02 Jan 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WAT	Stock Option (Right to Buy)	Award	$0	+828		$0.000000	828	02 Jan 2026	Common Stock	828	$381.96	Direct	F3

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

Explanation of Responses:

Id	Content
F1	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.
F2	Represents shares of common stock subject to restrictions that will lapse with respect to 100% of the shares on January 2, 2027.
F3	All of the shares of common stock underlying this stock option will vest and become exercisable on January 2, 2027.