Mark Vergnano - 02 Jan 2026 Form 4 Insider Report for WATERS CORP /DE/ (WAT)

Role: Director
Signature: /s/ Michael Lynn, attorney-in-fact for Mark Vergnano
Issuer symbol: WAT
Transactions as of: 02 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Jan 2026, 17:53:55 UTC
Previous filing: 14 Mar 2025
Next filing: 05 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Vergnano Mark	Director	34 MAPLE STREET, MILFORD	/s/ Michael Lynn, attorney-in-fact for Mark Vergnano	05 Jan 2026	0001474107

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WAT	Common Stock	Award	$0	+307	+7.3%	$0.000000	4,517	02 Jan 2026	Direct	F1

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	F2

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

Explanation of Responses:

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