Your Vote Counts! WEST PHARMACEUTICAL SERVICES, INC. C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717 You invested in WEST PHARMACEUTICAL SERVICES, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 4, 2021. Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper copy of voting material(s) by requesting prior to April 20, 2021. If you would like to request a copy of the voting material(s), you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote Virtually at the Meeting* May 4, 2021 2:00 PM EDT Virtually at: www.virtualshareholdermeeting.com/WST2021 *Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Smartphone users Point your camera here and vote without entering a control number V1 For complete information and to vote, visit www.ProxyVote.com Control # D35090-P50915 WEST PHARMACEUTICAL SERVICES, INC. 2021 Annual Meeting Vote by May 3, 2021 11:59 PM ET. For shares held in a Plan, vote by April 30, 2021 11:59 PM ET.

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends D35091-P50915 1. Election of Directors; Nominees: 1c. Robert Friel 1a. Mark A. Buthman 1d. Eric M. Green 1b. William F. Feehery 1e. Thomas W. Hofmann 1f. Deborah L. V. Keller 1g. Myla P. Lai-Goldman 1h. Douglas A. Michels 1i. Paolo Pucci 1j. Patrick J. Zenner 2. Advisory vote to approve named executive officer compensation; and 3. To ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for 2021. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. For For For For For For For For For For For For

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

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