<SEC-DOCUMENT>0001104659-20-048112.txt : 20200417
<SEC-HEADER>0001104659-20-048112.hdr.sgml : 20200417
<ACCEPTANCE-DATETIME>20200417143029
ACCESSION NUMBER:		0001104659-20-048112
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200417
DATE AS OF CHANGE:		20200417
EFFECTIVENESS DATE:		20200417

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WEST PHARMACEUTICAL SERVICES INC
		CENTRAL INDEX KEY:			0000105770
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED RUBBER PRODUCTS, NEC [3060]
		IRS NUMBER:				231210010
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08036
		FILM NUMBER:		20799108

	BUSINESS ADDRESS:	
		STREET 1:		530 HERMAN O. WEST DRIVE
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341
		BUSINESS PHONE:		6105942900

	MAIL ADDRESS:	
		STREET 1:		530 HERMAN O. WEST DRIVE
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WEST CO INC
		DATE OF NAME CHANGE:	19990405
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a20-16207_1defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>


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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">UNITED STATES</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="4" face="Times New Roman" style="font-size:14.0pt;font-weight:bold;">SCHEDULE 14A</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Proxy Statement   Pursuant to Section 14(a) of<br>   the Securities Exchange Act of 1934 (Amendment No. &nbsp;&nbsp;&nbsp;&nbsp;)</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed by the Registrant&nbsp;&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed by a Party other than the Registrant</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:96.22%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Preliminary Proxy Statement</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:96.22%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Confidential, for Use of the Commission Only (as   permitted by Rule 14a-6(e)(2))</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:96.22%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Definitive Proxy Statement</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Definitive Additional Materials</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:96.22%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Soliciting Material Pursuant to &#167;240.14a-12</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">West Pharmaceutical Services, Inc.</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name of Registrant   as Specified In Its Charter)</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name of Person(s)   Filing Proxy Statement, if other than the Registrant)</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="100%" colspan="4" valign="top" style="padding:0in .7pt 0in .7pt;width:100.0%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Payment of Filing Fee (Check the appropriate box):</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>    </td>
<td width="96%" colspan="3" valign="top" style="padding:0in .7pt 0in .7pt;width:96.32%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">No fee required.</font></p>    </td>   </tr>
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<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="3" valign="top" style="padding:0in .7pt 0in .7pt;width:96.32%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fee computed on table below per Exchange Act Rules 14a-6(i)(1)   and 0-11.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title of each class of securities to which transaction applies:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Aggregate number of securities to which transaction applies:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(3)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Per unit price or other underlying value of transaction computed   pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing   fee is calculated and state how it was determined):</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(4)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Proposed maximum aggregate value of transaction:</font></p>    </td>   </tr>
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<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(5)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Total fee paid:</font></p>    </td>   </tr>
<tr>
<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="3%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr style="page-break-inside:avoid;">
<td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.68%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>    </td>
<td width="96%" colspan="3" valign="top" style="padding:0in .7pt 0in .7pt;width:96.32%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fee paid previously with preliminary materials.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">  </font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check box if any part of the fee is offset as provided by   Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting   fee was paid previously. Identify the previous filing by registration   statement number, or the Form or Schedule and the date of its filing.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amount Previously Paid:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form, Schedule or Registration Statement No.:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(3)</font></p>    </td>
<td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filing Party:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:92.66%;">
<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(4)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date Filed:</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Persons   who are to respond to the collection of information contained in this form   are not required to respond unless the form displays a currently valid OMB   control number.</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SUPPLEMENT TO PROXY STATEMENT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">For</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">THE 2020 ANNUAL MEETING OF SHAREHOLDERS</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">To Be Held Tuesday, May&nbsp;5, 2020 at 2:00 PM</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This supplement, dated April&nbsp;17, 2020 (the &#147;Supplement&#148;), supplements the definitive proxy statement (the &#147;Proxy Statement&#148;) filed by West Pharmaceutical Services,&nbsp;Inc. (the &#147;Company&#148;) with the Securities and Exchange Commission (the &#147;SEC&#148;) on March&nbsp;25, 2020 and made available to the Company&#146;s shareholders in connection with the solicitation of proxies by the Board of Directors of the Company (the &#147;Board&#148;) for the 2020 Annual Meeting of Shareholders (the &#147;Annual Meeting&#148;), currently scheduled to be held on Tuesday, May&nbsp;5, 2020, at 9:30 AM Eastern Daylight Time. This Supplement is being filed with the SEC and made available to shareholders on or about April&nbsp;17, 2020. Shareholders of record of the Company&#146;s common stock on March&nbsp;10, 2020 are entitled to vote at the Annual Meeting.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">As previewed in our Proxy Statement, the Company has determined it is in the best interests of shareholders to hold a virtual shareholder meeting due to the ongoing COVID-19 pandemic and restrictions issued by the Commonwealth of Pennsylvania and the U.S. Center for Disease Control.&#160; By holding a virtual meeting, we will be doing our part to protect the health and well-being of our shareholders, employees and our community.&#160; <b><u style="font-weight:bold;">No shareholders will be permitted to attend the 2020 Annual Meeting in person</u></b>. However, the virtual meeting has been designed to ensure shareholders can participate to the same extent that they would have been able to do so at an in-person meeting by utilizing our online tools.&#160; This meeting will be facilitated by our transfer agent, Broadridge, and to accommodate the change from an in-person to a virtual meeting, <b><u style="font-weight:bold;">the meeting date remains the same, but the time has changed from 9:30 AM to 2:00 PM</u></b>.&#160; This change does not impact voting methods, other than the in-person method.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">To participate in the virtual Annual Meeting or to vote in that meeting, shareholders must enter the 16-digit digital control number found on the proxy cards previously provided to you at the meeting-specific website of www.virtualshareholdermeeting.com/WST2020 on the day of the meeting.&#160; The meeting will begin promptly at 2:00 PM on Tuesday May&nbsp;5, 2020 and online access to the webcast will open 15 minutes prior to the start of the meeting.&#160; We encourage you to log on early. Additionally, shareholders participating in the Annual Meeting via the webcast may submit questions through the virtual meeting platform by following the online instructions.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">All prior methods described in the Proxy Statement dated March&nbsp;25 are still available.&#160; You may vote by mail, by phone (1-800-690-6903) or by going to www.proxyvote.com before 11:59 PM on Monday, May&nbsp;4, 2020.&#160; After that time, no more votes will be accepted until the time of the meeting.&#160; Once the meeting commences, you may vote during the meeting by going to www.virtualshareholdermeeting.com/WST2020 and following the instructions on the website.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In addition to the meeting change format and time, subsequent to the mailing date, the New York Stock Exchange (&#147;NYSE&#148;) confirmed that Proposal 3 in our Proxy Statement, regarding a proposed amendment of Article&nbsp;5 of our Amended and Restated Articles of Incorporation to</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">increase the number of shares of common stock that the Company is authorized to issue from 100 million to 200 million, is a discretionary or &#147;routine&#148; matter under NYSE rules.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">As Proposal 3 is a routine matter, if a shareholder does not instruct his or her broker on how to vote those shares on this proposal, the shareholder&#146;s broker will be permitted to vote those shares at its discretion on such proposal. Based on this analysis, the third line in the chart appearing at the top of page&nbsp;73 the &#147;Broker Discretionary Voting&#148; column is revised to say &#147;Yes&#148; instead of &#147;No.&#148;&#160; Therefore, for Proposal 3, we would not expect any broker non-votes, which occur when a beneficial owner does not instruct his or her broker how to vote on non-routine matters.&#160; Additionally, we do not expect any broker non-votes for Proposal 4 regarding Ratification of Appointment of PricewaterhouseCoopers LLC as our Independent Registered Public Accounting Firm for 2020, which is also a routine matter.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Except as described in this Supplement, none of the items or information presented in the Proxy Statement is affected by this Supplement.&nbsp;This Supplement does not provide all of the information that is important to your voting decisions at the Annual Meeting. The Proxy Statement contains other important additional information. We encourage you to carefully read this Supplement together with the Proxy Statement.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">If you have already voted and do not wish to change your vote, no further actions by you are necessary.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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