WST US Equity

WEST PHARMACEUTICAL SERVICES INC

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Health Care · Surgical & Medical Instruments & Apparatus · CIK 105770 · FYE 1231

$337.46

+0.46 (+0.14%)

USD · as of 2026-07-29 · marketstack

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Institutional ownership· 13F filers holding WST · 2026-Q1 methodology → sources →

749 holders

% of shares outstanding held

101.0%

Shares held (13F)

71,082,443

Reporting holders

749

Institutional 13F holdings sum to 101.0% of shares outstanding. Readings above 100% reflect securities-lending double counting: shares on loan to short sellers are reported long by both the lending institution and the one that bought them. FINRA short interest of 2,425,762 shares (settlement 2026-04-30) accounts for the excess.

Top holders

largest 100 of 749 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	6,836,7146.8M	$1.7B	9.71%	ADD 4%
2	VANGUARD CAPITAL MANAGEMENT LLC	4,683,2864.7M	$1.2B	6.65%	NEW†
3	VANGUARD PORTFOLIO MANAGEMENT LLC	4,094,0094.1M	$1.0B	5.82%	NEW†
4	STATE STREET CORP	3,293,7783.3M	$826M	4.68%	—
5	Artisan Partners Limited Partnership	2,657,8932.7M	$666M	3.78%	TRIM -7%
6	Bank of New York Mellon Corp	2,465,8582.5M	$618M	3.50%	TRIM -7%
7	T. Rowe Price Investment Management, Inc.	2,340,4032.3M	$587M	3.33%	ADD 19%
8	GENERATION INVESTMENT MANAGEMENT LLP	2,243,9762.2M	$562M	3.19%	ADD 44%
9	GEODE CAPITAL MANAGEMENT, LLC	1,912,4551.9M	$478M	2.72%	ADD 2%
10	MORGAN STANLEY	1,458,2821.5M	$366M	2.07%	TRIM -5%
11	BROWN ADVISORY INC	1,340,8771.3M	$336M	1.91%	TRIM -31%
12	Longview Partners (Guernsey) LTD	1,315,4031.3M	$330M	1.87%	ADD 16%
13	FMR LLC	1,249,7481.2M	$313M	1.78%	ADD 1040%
14	APG Asset Management N.V.	1,267,2821.3M	$276M	1.80%	ADD 6%
15	Invesco Ltd.	1,056,0071.1M	$265M	1.50%	ADD 16%
16	JPMORGAN CHASE & CO	1,043,4171.0M	$256M	1.48%	ADD 279%
17	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	902,764902,764	$226M	1.28%	—
18	KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	858,298858,298	$215M	1.22%	TRIM -10%
19	TD Asset Management Inc	768,953768,953	$193M	1.09%	ADD 27%
20	NORTHERN TRUST CORP	731,283731,283	$183M	1.04%	—
21	GOLDMAN SACHS GROUP INC	727,617727,617	$182M	1.03%	ADD 65%
22	VAN ECK ASSOCIATES CORP	713,579713,579	$179M	1.01%	—
23	JACOBS LEVY EQUITY MANAGEMENT, INC	705,336705,336	$177M	1.00%	ADD 10%
24	ProShare Advisors LLC	660,084660,084	$165M	0.94%	ADD 12%
25	Amundi	644,065644,065	$161M	0.92%	ADD 85%
26	Findlay Park Partners LLP	616,766616,766	$155M	0.88%	TRIM -8%
27	Capital Research Global Investors	604,011604,011	$151M	0.86%	NEW
28	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	554,332554,332	$139M	0.79%	ADD 2%
29	Epoch Investment Partners, Inc.	545,050545,050	$137M	0.77%	ADD 8%
30	SEI INVESTMENTS CO	529,261529,261	$133M	0.75%	TRIM -11%
31	PRICE T ROWE ASSOCIATES INC /MD/	526,383526,383	$132M	0.75%	ADD 55%
32	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	510,516510,516	$128M	0.73%	ADD 70%
33	Legal & General Group Plc	506,458506,458	$127M	0.72%	—
34	DIMENSIONAL FUND ADVISORS LP	461,462461,462	$116M	0.66%	ADD 6%
35	GATES FOUNDATION TRUST	444,500444,500	$111M	0.63%	—
36	DEUTSCHE BANK AG\	418,854418,854	$105M	0.60%	ADD 12%
37	VIKING GLOBAL INVESTORS LPtracked	416,948416,948	$105M	0.59%	ADD 41%
38	Nuveen, LLC	408,990408,990	$103M	0.58%	—
39	VANGUARD FIDUCIARY TRUST CO	405,104405,104	$102M	0.58%	NEW
40	AMERICAN CENTURY COMPANIES INC	399,700399,700	$100M	0.57%	TRIM -10%
41	STATE FARM MUTUAL AUTOMOBILE INSURANCE CO	388,239388,239	$97M	0.55%	—
42	BANK OF AMERICA CORP /DE/	381,813381,813	$96M	0.54%	TRIM -28%
43	ROYAL BANK OF CANADA	377,552377,552	$95M	0.54%	TRIM -15%
44	BARCLAYS PLC	349,104349,104	$87M	0.50%	ADD 146%
45	Liontrust Investment Partners LLP	336,995336,995	$84M	0.48%	TRIM -8%
46	CITADEL ADVISORS LLC	323,587323,587	$81M	0.46%	ADD 32%
47	BNP PARIBAS FINANCIAL MARKETS	313,594313,594	$79M	0.45%	ADD 47%
48	JANE STREET GROUP, LLC	305,132305,132	$76M	0.43%	ADD 39%
49	UBS Group AG	275,508275,508	$69M	0.39%	ADD 10%
50	WORLDQUANT MILLENNIUM ADVISORS LLC	268,107268,107	$67M	0.38%	ADD 1789%
51	AQR CAPITAL MANAGEMENT LLC	266,944266,944	$67M	0.38%	TRIM -48%
52	RIVERBRIDGE PARTNERS LLC	261,442261,442	$66M	0.37%	TRIM -18%
53	RHUMBLINE ADVISERS	259,227259,227	$65M	0.37%	TRIM -5%
54	Stonehage Fleming Financial Services Holdings Ltd	254,817254,817	$64M	0.36%	NEW
55	WELLINGTON MANAGEMENT GROUP LLP	248,636248,636	$62M	0.35%	ADD 1468%
56	ENVESTNET ASSET MANAGEMENT INC	235,521235,521	$59M	0.33%	TRIM -5%
57	California Public Employees Retirement System	232,917232,917	$58M	0.33%	ADD 89%
58	BROWN BROTHERS HARRIMAN & CO	228,415228,415	$57M	0.32%	TRIM -5%
59	Border to Coast Pensions Partnership Ltd	226,857226,857	$57M	0.32%	TRIM -4%
60	Seilern Investment Management Ltd	226,021226,021	$57M	0.32%	TRIM -19%
61	TWO SIGMA INVESTMENTS, LP	225,631225,631	$57M	0.32%	ADD 61%
62	Swiss National Bank	211,160211,160	$53M	0.30%	ADD 7%
63	RENAISSANCE TECHNOLOGIES LLC	209,660209,660	$53M	0.30%	ADD 100%
64	FEDERATED HERMES, INC.	208,161208,161	$52M	0.30%	ADD 4%
65	Champlain Investment Partners, LLC	205,979205,979	$52M	0.29%	TRIM -57%
66	Holocene Advisors, LP	203,621203,621	$51M	0.29%	ADD 59%
67	LGT Group Foundation	203,556203,556	$51M	0.29%	—
68	Vest Financial, LLC	202,948202,948	$51M	0.29%	ADD 14%
69	BAMCO INC /NY/	199,750199,750	$50M	0.28%	TRIM -24%
70	Russell Investments Group, Ltd.	195,332195,332	$49M	0.28%	ADD 13%
71	Mitsubishi UFJ Asset Management Co., Ltd.	182,085182,085	$46M	0.26%	ADD 9%
72	NEUBERGER BERMAN GROUP LLC	181,853181,853	$46M	0.26%	TRIM -57%
73	Allianz Asset Management GmbH	176,560176,560	$44M	0.25%	ADD 628%
74	NOMURA ASSET MANAGEMENT CO LTD	174,262174,262	$44M	0.25%	ADD 13%
75	Sumitomo Mitsui Trust Group, Inc.	172,780172,780	$43M	0.25%	—
76	Quantinno Capital Management LP	161,478161,478	$40M	0.23%	ADD 53%
77	Birch Hill Investment Advisors LLC	161,159161,159	$40M	0.23%	ADD 6%
78	Point72 Asset Management, L.P.	159,350159,350	$40M	0.23%	TRIM -32%
79	Vanguard Global Advisers, LLC	157,737157,737	$40M	0.22%	NEW
80	HSBC HOLDINGS PLC	156,895156,895	$39M	0.22%	TRIM -47%
81	AMI ASSET MANAGEMENT CORP	154,401154,401	$39M	0.22%	TRIM -3%
82	CITIGROUP INC	142,434142,434	$36M	0.20%	TRIM -2%
83	Assenagon Asset Management S.A.	137,561137,561	$34M	0.20%	TRIM -45%
84	CANADA PENSION PLAN INVESTMENT BOARD	135,370135,370	$34M	0.19%	ADD 18%
85	SCHRODER INVESTMENT MANAGEMENT GROUP	135,006135,006	$33M	0.19%	TRIM -25%
86	Conestoga Capital Advisors, LLC	130,970130,970	$33M	0.19%	ADD 7%
87	BANK OF MONTREAL /CAN/	127,174127,174	$32M	0.18%	TRIM -4%
88	VANGUARD ASSET MANAGEMENT, Ltd	124,642124,642	$31M	0.18%	NEW
89	Local Pensions Partnership Investment Ltd	120,880120,880	$30M	0.17%	—
90	DF DENT & CO INC	120,597120,597	$30M	0.17%	TRIM -62%
91	Ninety One UK Ltd	119,231119,231	$30M	0.17%	ADD 17%
92	SG Americas Securities, LLC	114,044114,044	$29M	0.16%	ADD 13%
93	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	110,634110,634	$28M	0.16%	TRIM -3%
94	Nan Shan Life Insurance Co., Ltd.	109,867109,867	$28M	0.16%	—
95	ROYAL LONDON ASSET MANAGEMENT LTD	99,55099,550	$25M	0.14%	ADD 8%
96	WELLS FARGO & COMPANY/MN	96,97496,974	$24M	0.14%	TRIM -9%
97	PRUDENTIAL FINANCIAL INC	96,41296,412	$24M	0.14%	TRIM -41%
98	ALLIANCEBERNSTEIN L.P.	87,30187,301	$24M	0.12%	ADD 9%
99	PRINCIPAL FINANCIAL GROUP INC	85,36385,363	$21M	0.12%	—
100	Creative Planning	83,37283,372	$21M	0.12%	ADD 5%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

7.5M

6.9M

6.6M

6.5M

6.6M

6.8M

$1.7B

VANGUARD CAPITAL MANAGEMENT LLC

—

4.7M

$1.2B

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.1M

$1.0B

STATE STREET CORP

3.2M

3.3M

3.2M

3.3M

$826M

Artisan Partners Limited Partnership

3.1M

2.2M

2.3M

2.8M

2.9M

2.7M

$666M

Bank of New York Mellon Corp

3.4M

3.2M

2.9M

2.7M

2.5M

$618M

T. Rowe Price Investment Management, Inc.

733K

462K

466K

701K

2.0M

2.3M

$587M

GENERATION INVESTMENT MANAGEMENT LLP

—

1.2M

976K

1.6M

2.2M

$562M

GEODE CAPITAL MANAGEMENT, LLC

1.8M

1.9M

1.8M

1.9M

$478M

MORGAN STANLEY

1.0M

1.3M

1.5M

$366M

BROWN ADVISORY INC

2.6M

3.3M

3.0M

2.5M

1.9M

1.3M

$336M

Longview Partners (Guernsey) LTD

—

352K

1.1M

1.3M

$330M

FMR LLC

1.1M

739K

105K

44K

110K

1.2M

$313M

APG Asset Management N.V.

1.4M

1.6M

1.7M

1.4M

1.2M

1.3M

$276M

Invesco Ltd.

755K

949K

960K

881K

909K

1.1M

$265M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	749	71,082,443	101.0%	$17.8B
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · WST

Large holders — 13G, passive (top 4 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	8.4%	QII	2025-03-31	SEC →
VANGUARD CAPITAL MANAGEMENT LLC	7.48%	QII	2026-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	5.69%	QII	2026-03-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).

Institutional ownership· 13F filers holding WST · 2026-Q1 methodology → sources →

749 holders

% of shares outstanding held

101.0%

Shares held (13F)

71,082,443

Reporting holders

749

Top holders

largest 100 of 749 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	6,836,7146.8M	$1.7B	9.71%	ADD 4%
2	VANGUARD CAPITAL MANAGEMENT LLC	4,683,2864.7M	$1.2B	6.65%	NEW†
3	VANGUARD PORTFOLIO MANAGEMENT LLC	4,094,0094.1M	$1.0B	5.82%	NEW†
4	STATE STREET CORP	3,293,7783.3M	$826M	4.68%	—
5	Artisan Partners Limited Partnership	2,657,8932.7M	$666M	3.78%	TRIM -7%
6	Bank of New York Mellon Corp	2,465,8582.5M	$618M	3.50%	TRIM -7%
7	T. Rowe Price Investment Management, Inc.	2,340,4032.3M	$587M	3.33%	ADD 19%
8	GENERATION INVESTMENT MANAGEMENT LLP	2,243,9762.2M	$562M	3.19%	ADD 44%
9	GEODE CAPITAL MANAGEMENT, LLC	1,912,4551.9M	$478M	2.72%	ADD 2%
10	MORGAN STANLEY	1,458,2821.5M	$366M	2.07%	TRIM -5%
11	BROWN ADVISORY INC	1,340,8771.3M	$336M	1.91%	TRIM -31%
12	Longview Partners (Guernsey) LTD	1,315,4031.3M	$330M	1.87%	ADD 16%
13	FMR LLC	1,249,7481.2M	$313M	1.78%	ADD 1040%
14	APG Asset Management N.V.	1,267,2821.3M	$276M	1.80%	ADD 6%
15	Invesco Ltd.	1,056,0071.1M	$265M	1.50%	ADD 16%
16	JPMORGAN CHASE & CO	1,043,4171.0M	$256M	1.48%	ADD 279%
17	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	902,764902,764	$226M	1.28%	—
18	KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	858,298858,298	$215M	1.22%	TRIM -10%
19	TD Asset Management Inc	768,953768,953	$193M	1.09%	ADD 27%
20	NORTHERN TRUST CORP	731,283731,283	$183M	1.04%	—
21	GOLDMAN SACHS GROUP INC	727,617727,617	$182M	1.03%	ADD 65%
22	VAN ECK ASSOCIATES CORP	713,579713,579	$179M	1.01%	—
23	JACOBS LEVY EQUITY MANAGEMENT, INC	705,336705,336	$177M	1.00%	ADD 10%
24	ProShare Advisors LLC	660,084660,084	$165M	0.94%	ADD 12%
25	Amundi	644,065644,065	$161M	0.92%	ADD 85%
26	Findlay Park Partners LLP	616,766616,766	$155M	0.88%	TRIM -8%
27	Capital Research Global Investors	604,011604,011	$151M	0.86%	NEW
28	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	554,332554,332	$139M	0.79%	ADD 2%
29	Epoch Investment Partners, Inc.	545,050545,050	$137M	0.77%	ADD 8%
30	SEI INVESTMENTS CO	529,261529,261	$133M	0.75%	TRIM -11%
31	PRICE T ROWE ASSOCIATES INC /MD/	526,383526,383	$132M	0.75%	ADD 55%
32	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	510,516510,516	$128M	0.73%	ADD 70%
33	Legal & General Group Plc	506,458506,458	$127M	0.72%	—
34	DIMENSIONAL FUND ADVISORS LP	461,462461,462	$116M	0.66%	ADD 6%
35	GATES FOUNDATION TRUST	444,500444,500	$111M	0.63%	—
36	DEUTSCHE BANK AG\	418,854418,854	$105M	0.60%	ADD 12%
37	VIKING GLOBAL INVESTORS LPtracked	416,948416,948	$105M	0.59%	ADD 41%
38	Nuveen, LLC	408,990408,990	$103M	0.58%	—
39	VANGUARD FIDUCIARY TRUST CO	405,104405,104	$102M	0.58%	NEW
40	AMERICAN CENTURY COMPANIES INC	399,700399,700	$100M	0.57%	TRIM -10%
41	STATE FARM MUTUAL AUTOMOBILE INSURANCE CO	388,239388,239	$97M	0.55%	—
42	BANK OF AMERICA CORP /DE/	381,813381,813	$96M	0.54%	TRIM -28%
43	ROYAL BANK OF CANADA	377,552377,552	$95M	0.54%	TRIM -15%
44	BARCLAYS PLC	349,104349,104	$87M	0.50%	ADD 146%
45	Liontrust Investment Partners LLP	336,995336,995	$84M	0.48%	TRIM -8%
46	CITADEL ADVISORS LLC	323,587323,587	$81M	0.46%	ADD 32%
47	BNP PARIBAS FINANCIAL MARKETS	313,594313,594	$79M	0.45%	ADD 47%
48	JANE STREET GROUP, LLC	305,132305,132	$76M	0.43%	ADD 39%
49	UBS Group AG	275,508275,508	$69M	0.39%	ADD 10%
50	WORLDQUANT MILLENNIUM ADVISORS LLC	268,107268,107	$67M	0.38%	ADD 1789%
51	AQR CAPITAL MANAGEMENT LLC	266,944266,944	$67M	0.38%	TRIM -48%
52	RIVERBRIDGE PARTNERS LLC	261,442261,442	$66M	0.37%	TRIM -18%
53	RHUMBLINE ADVISERS	259,227259,227	$65M	0.37%	TRIM -5%
54	Stonehage Fleming Financial Services Holdings Ltd	254,817254,817	$64M	0.36%	NEW
55	WELLINGTON MANAGEMENT GROUP LLP	248,636248,636	$62M	0.35%	ADD 1468%
56	ENVESTNET ASSET MANAGEMENT INC	235,521235,521	$59M	0.33%	TRIM -5%
57	California Public Employees Retirement System	232,917232,917	$58M	0.33%	ADD 89%
58	BROWN BROTHERS HARRIMAN & CO	228,415228,415	$57M	0.32%	TRIM -5%
59	Border to Coast Pensions Partnership Ltd	226,857226,857	$57M	0.32%	TRIM -4%
60	Seilern Investment Management Ltd	226,021226,021	$57M	0.32%	TRIM -19%
61	TWO SIGMA INVESTMENTS, LP	225,631225,631	$57M	0.32%	ADD 61%
62	Swiss National Bank	211,160211,160	$53M	0.30%	ADD 7%
63	RENAISSANCE TECHNOLOGIES LLC	209,660209,660	$53M	0.30%	ADD 100%
64	FEDERATED HERMES, INC.	208,161208,161	$52M	0.30%	ADD 4%
65	Champlain Investment Partners, LLC	205,979205,979	$52M	0.29%	TRIM -57%
66	Holocene Advisors, LP	203,621203,621	$51M	0.29%	ADD 59%
67	LGT Group Foundation	203,556203,556	$51M	0.29%	—
68	Vest Financial, LLC	202,948202,948	$51M	0.29%	ADD 14%
69	BAMCO INC /NY/	199,750199,750	$50M	0.28%	TRIM -24%
70	Russell Investments Group, Ltd.	195,332195,332	$49M	0.28%	ADD 13%
71	Mitsubishi UFJ Asset Management Co., Ltd.	182,085182,085	$46M	0.26%	ADD 9%
72	NEUBERGER BERMAN GROUP LLC	181,853181,853	$46M	0.26%	TRIM -57%
73	Allianz Asset Management GmbH	176,560176,560	$44M	0.25%	ADD 628%
74	NOMURA ASSET MANAGEMENT CO LTD	174,262174,262	$44M	0.25%	ADD 13%
75	Sumitomo Mitsui Trust Group, Inc.	172,780172,780	$43M	0.25%	—
76	Quantinno Capital Management LP	161,478161,478	$40M	0.23%	ADD 53%
77	Birch Hill Investment Advisors LLC	161,159161,159	$40M	0.23%	ADD 6%
78	Point72 Asset Management, L.P.	159,350159,350	$40M	0.23%	TRIM -32%
79	Vanguard Global Advisers, LLC	157,737157,737	$40M	0.22%	NEW
80	HSBC HOLDINGS PLC	156,895156,895	$39M	0.22%	TRIM -47%
81	AMI ASSET MANAGEMENT CORP	154,401154,401	$39M	0.22%	TRIM -3%
82	CITIGROUP INC	142,434142,434	$36M	0.20%	TRIM -2%
83	Assenagon Asset Management S.A.	137,561137,561	$34M	0.20%	TRIM -45%
84	CANADA PENSION PLAN INVESTMENT BOARD	135,370135,370	$34M	0.19%	ADD 18%
85	SCHRODER INVESTMENT MANAGEMENT GROUP	135,006135,006	$33M	0.19%	TRIM -25%
86	Conestoga Capital Advisors, LLC	130,970130,970	$33M	0.19%	ADD 7%
87	BANK OF MONTREAL /CAN/	127,174127,174	$32M	0.18%	TRIM -4%
88	VANGUARD ASSET MANAGEMENT, Ltd	124,642124,642	$31M	0.18%	NEW
89	Local Pensions Partnership Investment Ltd	120,880120,880	$30M	0.17%	—
90	DF DENT & CO INC	120,597120,597	$30M	0.17%	TRIM -62%
91	Ninety One UK Ltd	119,231119,231	$30M	0.17%	ADD 17%
92	SG Americas Securities, LLC	114,044114,044	$29M	0.16%	ADD 13%
93	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	110,634110,634	$28M	0.16%	TRIM -3%
94	Nan Shan Life Insurance Co., Ltd.	109,867109,867	$28M	0.16%	—
95	ROYAL LONDON ASSET MANAGEMENT LTD	99,55099,550	$25M	0.14%	ADD 8%
96	WELLS FARGO & COMPANY/MN	96,97496,974	$24M	0.14%	TRIM -9%
97	PRUDENTIAL FINANCIAL INC	96,41296,412	$24M	0.14%	TRIM -41%
98	ALLIANCEBERNSTEIN L.P.	87,30187,301	$24M	0.12%	ADD 9%
99	PRINCIPAL FINANCIAL GROUP INC	85,36385,363	$21M	0.12%	—
100	Creative Planning	83,37283,372	$21M	0.12%	ADD 5%

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

7.5M

6.9M

6.6M

6.5M

6.6M

6.8M

$1.7B

VANGUARD CAPITAL MANAGEMENT LLC

—

4.7M

$1.2B

VANGUARD PORTFOLIO MANAGEMENT LLC

—

4.1M

$1.0B

STATE STREET CORP

3.2M

3.3M

3.2M

3.3M

$826M

Artisan Partners Limited Partnership

3.1M

2.2M

2.3M

2.8M

2.9M

2.7M

$666M

Bank of New York Mellon Corp

3.4M

3.2M

2.9M

2.7M

2.5M

$618M

T. Rowe Price Investment Management, Inc.

733K

462K

466K

701K

2.0M

2.3M

$587M

GENERATION INVESTMENT MANAGEMENT LLP

—

1.2M

976K

1.6M

2.2M

$562M

GEODE CAPITAL MANAGEMENT, LLC

1.8M

1.9M

1.8M

1.9M

$478M

MORGAN STANLEY

1.0M

1.3M

1.5M

$366M

BROWN ADVISORY INC

2.6M

3.3M

3.0M

2.5M

1.9M

1.3M

$336M

Longview Partners (Guernsey) LTD

—

352K

1.1M

1.3M

$330M

FMR LLC

1.1M

739K

105K

44K

110K

1.2M

$313M

APG Asset Management N.V.

1.4M

1.6M

1.7M

1.4M

1.2M

1.3M

$276M

Invesco Ltd.

755K

949K

960K

881K

909K

1.1M

$265M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	749	71,082,443	101.0%	$17.8B
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · WST

Large holders — 13G, passive (top 4 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	8.4%	QII	2025-03-31	SEC →
VANGUARD CAPITAL MANAGEMENT LLC	7.48%	QII	2026-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	5.69%	QII	2026-03-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

WST US Equity☆

Institutional ownership· 13F filers holding WST · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · WST

Institutional ownership· 13F filers holding WST · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · WST

WST US Equity