What does CUSIP 955306105 represent in this 13F holders report?

CUSIP 955306105 is the security identifier for WST - WEST PHARMACEUTICAL SERVICES INC - Common Stock used to aggregate holder disclosures.

How many institutions held WST - WEST PHARMACEUTICAL SERVICES INC - Common Stock in Q1 2017?

289 institutional investors reported WST - WEST PHARMACEUTICAL SERVICES INC - Common Stock for Q1 2017. Use the holders table for investor-level position and value details.

WEST PHARMACEUTICAL SERVICES INC - Common Stock (WST)

CUSIP: 955306105

Q1 2017 13F Holders as of 31 Mar 2017

Type / Class: Equity / Common Stock
Shares outstanding: 72,162,981
Total 13F shares: 66,678,304
Share change: +4,821,965
Total reported value: $5,442,811,783
Put/Call ratio: 65%
Price per share: $81.61
Number of holders: 289
Value change: +$392,806,753
Number of buys: 150
Number of sells: 124

Quarterly Holders Quick Answers

What is CUSIP 955306105?
CUSIP 955306105 identifies WST - WEST PHARMACEUTICAL SERVICES INC - Common Stock in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2017
Previous quarter: Q4 2016

Recent filing periods for CUSIP 955306105:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of WST - WEST PHARMACEUTICAL SERVICES INC - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	14%	9,808,189	$832,029,000	—	31 Dec 2016	13F
VANGUARD GROUP INC	13F	Company	8.4%	6,048,328	$513,080,000	—	31 Dec 2016	13F
Neuberger Berman Group LLC	13F	Company	5.5%	3,990,299	$338,497,000	—	31 Dec 2016	13F
FRANKLIN RESOURCES INC	13F	Company	5.5%	3,949,044	$335,002,000	—	31 Dec 2016	13F
BlackRock Fund Advisors	13F	Company	3.9%	2,815,523	$238,841,000	—	31 Dec 2016	13F
Select Equity Group, L.P.	13F	Company	3.8%	2,731,604	$231,721,967	—	31 Dec 2016	13F
STATE STREET CORP	13F	Company	3.5%	2,547,529	$216,107,000	—	31 Dec 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	3%	2,185,773	$185,419,000	—	31 Dec 2016	13F
BAMCO INC /NY/	13F	Company	3%	2,138,775	$181,432,000	—	31 Dec 2016	13F
JPMORGAN CHASE & CO	13F	Company	2.6%	1,844,890	$156,502,000	—	31 Dec 2016	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	1.7%	1,261,842	$107,042,000	—	31 Dec 2016	13F
Fisher Asset Management, LLC	13F	Company	1.6%	1,170,631	$99,305,000	—	31 Dec 2016	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	1.6%	1,166,740	$98,975,000	—	31 Dec 2016	13F
GW&K Investment Management, LLC	13F	Company	1.4%	1,025,255	$86,972,000	—	31 Dec 2016	13F
HERMES INVESTMENT MANAGEMENT LTD	13F	Company	1.3%	942,173	$79,925,000	—	31 Dec 2016	13F
GOLDMAN SACHS GROUP INC	13F	Company	1.3%	925,808	$78,536,000	—	31 Dec 2016	13F
ROYAL BANK OF CANADA	13F	Company	1.2%	838,939	$71,167,000	—	31 Dec 2016	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	1.2%	838,151	$71,100,000	—	31 Dec 2016	13F
Bank of New York Mellon Corp	13F	Company	1.1%	814,014	$69,053,000	—	31 Dec 2016	13F
BANK OF AMERICA CORP /DE/	13F	Company	1%	747,341	$63,396,000	—	31 Dec 2016	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	1%	744,061	$63,118,000	—	31 Dec 2016	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.97%	701,075	$59,472,000	—	31 Dec 2016	13F
KALMAR INVESTMENTS INC /DE/	13F	Company	0.96%	695,976	$59,040,000	—	31 Dec 2016	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.93%	674,079	$57,183,000	—	31 Dec 2016	13F
OppenheimerFunds, Inc.	13F	Company	0.88%	635,464	$53,907,000	—	31 Dec 2016	13F
NORTHERN TRUST CORP	13F	Company	0.88%	633,986	$53,781,000	—	31 Dec 2016	13F
COLUMBIA WANGER ASSET MANAGEMENT LLC	13F	Company	0.84%	606,983	$51,490,000	—	31 Dec 2016	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.78%	564,839	$47,915,000	—	31 Dec 2016	13F
NORGES BANK	13F	Company	0.75%	538,103	$45,647,000	—	31 Dec 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.72%	516,115	$43,782,000	—	31 Dec 2016	13F
JENNISON ASSOCIATES LLC	13F	Company	0.67%	480,136	$40,730,000	—	31 Dec 2016	13F
Invesco Ltd.	13F	Company	0.56%	400,534	$33,977,000	—	31 Dec 2016	13F
Sterling Capital Management LLC	13F	Company	0.55%	397,954	$33,758,000	—	31 Dec 2016	13F
IRONBRIDGE CAPITAL MANAGEMENT LP	13F	Company	0.54%	393,029	$33,341,000	—	31 Dec 2016	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.54%	390,531	$33,129,000	—	31 Dec 2016	13F
RUANE, CUNNIFF & GOLDFARB INC	13F	Company	0.52%	373,781	$31,708,000	—	31 Dec 2016	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.52%	371,661	$31,529,000	—	31 Dec 2016	13F
Granahan Investment Management, LLC	13F	Company	0.49%	353,110	$29,954,000	—	31 Dec 2016	13F
LORD, ABBETT & CO. LLC	13F	Company	0.48%	344,650	$29,237,000	—	31 Dec 2016	13F
Copper Rock Capital Partners, LLC	13F	Company	0.47%	338,083	$28,680,000	—	31 Dec 2016	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.41%	296,058	$25,114,000	—	31 Dec 2016	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.39%	284,647	$24,146,000	—	31 Dec 2016	13F
KENNEDY CAPITAL MANAGEMENT LLC	13F	Company	0.39%	280,388	$23,785,000	—	31 Dec 2016	13F
Allianz Asset Management GmbH	13F	Company	0.37%	264,160	$22,409,000	—	31 Dec 2016	13F
BlackRock Investment Management, LLC	13F	Company	0.35%	249,107	$21,132,000	—	31 Dec 2016	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.34%	247,693	$21,012,000	—	31 Dec 2016	13F
Nationwide Fund Advisors	13F	Company	0.34%	245,701	$20,843,000	—	31 Dec 2016	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.33%	237,219	$20,123,000	—	31 Dec 2016	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.32%	232,438	$19,718,000	—	31 Dec 2016	13F
FIRST QUADRANT LLC/CA	13F	Company	0.3%	219,347	$18,607,000	—	31 Dec 2016	13F

Institutional Holders of WEST PHARMACEUTICAL SERVICES INC - Common Stock (WST) as of Q1 2017

As of 31 Mar 2017, WEST PHARMACEUTICAL SERVICES INC - Common Stock (WST) was held by 289 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 66,678,304 shares. The largest 10 holders included PRICE T ROWE ASSOCIATES INC /MD/, VANGUARD GROUP INC, BlackRock Inc., Neuberger Berman Group LLC, FRANKLIN RESOURCES INC, Select Equity Group, L.P., STATE STREET CORP, JPMORGAN CHASE & CO, BAMCO INC /NY/, and EAGLE ASSET MANAGEMENT INC. This page lists 289 institutional shareholders reporting positions in this security for the Q1 2017 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2017 vs Q4 2016 Across Filers

Q4 2016 holders

284

Q1 2017 holders

289

Holder diff

Investor	Q4 2016 Shares	Q1 2017 Shares	Share Diff	Share Chg %	Q4 2016 Value $	Q1 2017 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.