UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

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☐ Preliminary Proxy Statement

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☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

Waters Corporation

(Name of registrant as specified in its charter)

(Name of person(s) filing proxy statement, if other than the registrant)

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P.O. BOX 8016, CARY, NC 27512-9903 Scan QR for digital voting Meeting Materials: Notice of Meeting and Proxy Statement & Annual Report on Form 10-K Important Notice Regarding the Availability of Proxy Materials for the Shareholders Waters Corporation Meeting To Be Held On May 23, 2024 For Shareholders of record as of March 25, 2024 Annual Meeting of Shareholders To order paper materials, use one of the Thursday, May 23, 2024 9:00 AM, Eastern Time Annual Meeting to be held live via the Internet—please visit www.proxydocs.com/WAT for following methods. more details. You must pre-register to attend the meeting online and/or participate at www.proxydocs.com/WAT. Internet: For a convenient way to view proxy materials, VOTE, and obtain www.investorelections.com/WAT directions to attend the meeting go to www.proxydocs.com/WAT To vote your proxy while visiting this site, you will need the 12 digit control number in the box below. Call: 1-866-648-8133 This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. This is not a ballot. You cannot use this notice to vote your shares. We encourage you to access and review all of the important information contained in the proxy materials before voting. Email: paper@investorelections.com Under United States Securities and Exchange Commission rules, proxy materials do not have to be delivered in paper. Proxy materials can be distributed by making them available on the If requesting material by e-mail, please send a blank e-mail with the internet. 12 digit control number (located below) in the subject line. No other requests, instructions OR other inquiries should be included with your If you want to receive a paper or e-mail copy of the proxy materials, you must request one. e-mail requesting material. There is no charge to you for requesting a copy. In order to receive a paper package in time for this year’s meeting, you must make this request on or before May 13, 2024. Your control number Have the 12 digit control number located in the box above available when you access the website and follow the instructions. SEE REVERSE FOR FULL AGENDA Copyright © 2024 BetaNXT, Inc. or its affiliates. All Rights Reserved

Waters Corporation Annual Meeting of Shareholders THE BOARD OF DIRECTORS RECOMMENDS A VOTE: FOR ON PROPOSALS 1, 2, 3 AND 4 PROPOSAL 1. To elect directors to serve for the ensuing year and until their successors are elected; 1.01 Dr. Flemming Ornskov, M.D., M.P.H. 1.02 Linda Baddour 1.03 Udit Batra, Ph.D. 1.04 Dan Brennan 1.05 Richard Fearon 1.06 Pearl S. Huang, Ph.D. 1.07 Wei Jiang 1.08 Christopher A. Kuebler 1.09 Mark Vergnano 2. To ratify the selection of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2024; 3. To approve, by non-binding vote, executive compensation; 4. To amend the Company’s certificate of incorporation to provide for exculpation of certain officers of the Company as permitted by recent amendments to Delaware law; and 5. To consider and act upon any other matters which may properly come before the Annual Meeting or any adjournment thereof.