There is a long list of 778 institutional holders of West Pharmaceutical Services within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of West Pharmaceutical Services by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-West Pharmaceutical Services table below, the initial column indicates the name of each top institutional holder of West Pharmaceutical Services, with a link to that fund's top holdings. The next columns indicate the amount of West Pharmaceutical Services stock held by each of the institutional holders of West Pharmaceutical Services, followed by the West Pharmaceutical Services position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	8,939,467	$3,537,436	03/31/2024
WST	8,939,467	$3,537,436	03/31/2024
BlackRock Inc.	7,562,909	$2,992,719	03/31/2024
WST	7,562,909	$2,992,719	03/31/2024
Bank of New York Mellon Corp	3,292,213	$1,302,762	03/31/2024
WST	3,292,213	$1,302,762	03/31/2024
State Street Corp	3,271,929	$1,152,112	12/31/2023
WST	3,271,929	$1,152,112	12/31/2023
Franklin Resources Inc.	2,474,163	$979,051	03/31/2024
WST	2,474,163	$979,051	03/31/2024
APG Asset Management N.V.	2,337,698	$856,528	03/31/2024
WST	2,337,698	$856,528	03/31/2024
Price T Rowe Associates Inc. MD	2,327,394	$819,523	12/31/2023
WST	2,327,394	$819,523	12/31/2023
Artisan Partners Limited Partnership	2,066,537	$817,749	03/31/2024
WST	2,066,537	$817,749	03/31/2024
Geode Capital Management LLC	1,717,396	$677,964	03/31/2024
WST	1,717,396	$677,964	03/31/2024
Brown Advisory Inc.	1,637,877	$648,124	03/31/2024
WST	1,637,877	$648,124	03/31/2024
T. Rowe Price Investment Management Inc.	1,244,800	$438,319	12/31/2023
WST	1,244,800	$438,319	12/31/2023
Durable Capital Partners LP	1,138,730	$400,970	12/31/2023
WST	1,138,730	$400,970	12/31/2023
JPMorgan Chase & Co.		$388,871	03/31/2024
WST	981,015	$388,198	03/31/2024
Call	6,400	$2,533	03/31/2024
Put	4,700	$1,860	03/31/2024
Morgan Stanley	1,023,852	$360,520	12/31/2023
WST	1,023,852	$360,520	12/31/2023
Bamco Inc. NY	997,821	$351,353	12/31/2023
WST	997,821	$351,353	12/31/2023
Invesco Ltd.	942,669	$331,933	12/31/2023
WST	942,669	$331,933	12/31/2023
Citadel Advisors LLC		$319,942	12/31/2023
WST	929,017	$327,125	12/31/2023
Put	41,200	$14,507	12/31/2023
Call	20,800	$7,324	12/31/2023
Norges Bank	852,693	$300,250	12/31/2023
WST	852,693	$300,250	12/31/2023
Massachusetts Financial Services Co. MA	725,217	$286,976	03/31/2024
WST	725,217	$286,976	03/31/2024
Northern Trust Corp	771,645	$271,712	12/31/2023
WST	771,645	$271,712	12/31/2023
TD Asset Management Inc.	619,704	$245,223	03/31/2024
WST	619,704	$245,223	03/31/2024
Findlay Park Partners LLP	597,106	$236,281	03/31/2024
WST	597,106	$236,281	03/31/2024
Alliancebernstein L.P.	647,166	$227,880	12/31/2023
WST	647,166	$227,880	12/31/2023
Legal & General Group Plc	635,280	$223,695	12/31/2023
WST	635,280	$223,695	12/31/2023
Nuveen Asset Management LLC	551,917	$218,399	03/31/2024
WST	551,917	$218,399	03/31/2024
Macquarie Group Ltd.	572,871	$201,720	12/31/2023
WST	572,871	$201,720	12/31/2023
Riverbridge Partners LLC	501,891	$198,603	03/31/2024
WST	501,891	$198,603	03/31/2024
ProShare Advisors LLC	500,662	$198,117	03/31/2024
WST	500,662	$198,117	03/31/2024
Neuberger Berman Group LLC	488,334	$193,239	03/31/2024
WST	488,334	$193,239	03/31/2024
Bank of America Corp DE	496,373	$174,783	12/31/2023
WST	496,373	$174,783	12/31/2023
Charles Schwab Investment Management Inc.	434,964	$172,120	03/31/2024
WST	434,964	$172,120	03/31/2024
Kayne Anderson Rudnick Investment Management LLC	445,577	$156,897	12/31/2023
WST	445,577	$156,897	12/31/2023
State Farm Mutual Automobile Insurance Co.	388,239	$153,630	03/31/2024
WST	388,239	$153,630	03/31/2024
Goldman Sachs Group Inc.	434,189	$152,887	12/31/2023
WST	434,189	$152,887	12/31/2023
UBS Asset Management Americas Inc.	414,724	$146,033	12/31/2023
WST	414,724	$146,033	12/31/2023
Deutsche Bank AG	401,022	$141,208	12/31/2023
WST	401,022	$141,208	12/31/2023
Sei Investments Co.	355,818	$140,801	03/31/2024
WST	355,818	$140,801	03/31/2024
Eagle Asset Management Inc.	343,870	$136,152	03/31/2024
WST	343,870	$136,152	03/31/2024
Amundi	379,015	$132,405	12/31/2023
WST	379,015	$132,405	12/31/2023
Congress Asset Management Co. MA	328,132	$129,845	03/31/2024
WST	328,132	$129,845	03/31/2024
Royal Bank of Canada	341,697	$120,317	12/31/2023
WST	341,697	$120,317	12/31/2023
AustralianSuper Pty Ltd	274,460	$108,670	03/31/2024
WST	274,460	$108,670	03/31/2024
Envestnet Asset Management Inc.	274,392	$108,580	03/31/2024
WST	274,392	$108,580	03/31/2024
Ameriprise Financial Inc.	307,301	$108,207	12/31/2023
WST	307,301	$108,207	12/31/2023
Dimensional Fund Advisors LP	258,386	$102,246	03/31/2024
WST	258,386	$102,246	03/31/2024
FMR LLC	254,950	$100,886	03/31/2024
WST	254,950	$100,886	03/31/2024
Prudential Financial Inc.	281,020	$98,935	12/31/2023
WST	281,020	$98,935	12/31/2023
Intermede Investment Partners Ltd	248,073	$98,165	03/31/2024
WST	248,073	$98,165	03/31/2024
Swiss National Bank	221,600	$87,689	03/31/2024
WST	221,600	$87,689	03/31/2024
Rhumbline Advisers	212,987	$84,281	03/31/2024
WST	212,987	$84,281	03/31/2024