West Pharmaceutical Services Inc
WST- Exchange
- NYSE
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0000105770
In the last 90 days, West Pharmaceutical Services Inc insiders filed 0 open-market purchases and 2 sales; 834 institutions reported holding it in 13F filings for Q2 2026, worth $25.2B in total; Gates Foundation Trust is the only superinvestor holding it.
13F holders, Q1 2026
Institutional positions in West Pharmaceutical Services Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 755
- −37 vs. Q4 2025
- Shares held
- 71.1M
- +12.2M (+20.8%) vs. Q4 2025
- Total value
- $17.8B
- +$1.62B (+10.0%) vs. Q4 2025
- New holders
- 89
- 265 more added
- Sold out
- 126
- 281 more reduced
12 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting WST on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 834 | $25.2B |
| Q1 2026 | 755 | $17.8B |
| Q4 2025 | 804 | $19.1B |
| Q3 2025 | 758 | $18.0B |
| Q2 2025 | 733 | $15.3B |
| Q1 2025 | 715 | $15.6B |
| Q4 2024 | 747 | $22.9B |
| Q3 2024 | 733 | $20.5B |
| Q2 2024 | 778 | $22.4B |
| Q1 2024 | 778 | $27.0B |
| Q4 2023 | 784 | $24.1B |
| Q3 2023 | 759 | $25.8B |
| Q2 2023 | 735 | $26.0B |
| Q1 2023 | 698 | $24.0B |
| Q4 2022 | 638 | $16.3B |
| Q3 2022 | 638 | $16.9B |
| Q2 2022 | 657 | $20.6B |
| Q1 2022 | 718 | $28.2B |
| Q4 2021 | 731 | $32.2B |
| Q3 2021 | 672 | $28.5B |
| Q2 2021 | 641 | $24.7B |
| Q1 2021 | 591 | $19.3B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding West Pharmaceutical Services Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 248,636 | $62.3M | 0.01% | +232,776+1,467.7% | Added |
| Stonehage Fleming Financial Services Holdings Ltd | 254,817 | $63.9M | 2.32% | +254,817 | New |
| Rhumbline Advisers | 259,227 | $65.0M | 0.06% | −12,965−4.8% | Reduced |
| Riverbridge Partners LLC | 261,442 | $65.5M | 1.60% | −57,171−17.9% | Reduced |
| AQR Capital Management LLC | 266,944 | $66.5M | 0.03% | −250,687−48.4% | Reduced |
| Worldquant Millennium Advisors LLC | 268,107 | $67.2M | 0.26% | +253,914+1,789.0% | Added |
| UBS Group AG | 275,508 | $69.1M | 0.01% | +25,110+10.0% | Added |
| Jane Street Group, LLC | 305,132 | $76.5M | 0.08% | +85,386+38.9% | Added |
| BNP Paribas Arbitrage, SA | 313,594 | $78.6M | 0.05% | +100,261+47.0% | Added |
| Citadel Advisors LLC | 323,587 | $81.1M | 0.06% | +77,947+31.7% | Added |
| Liontrust Investment Partners LLP | 336,995 | $84.5M | 1.44% | −29,193−8.0% | Reduced |
| Barclays PLC | 349,104 | $87.5M | 0.03% | +206,919+145.5% | Added |
| Royal Bank of Canada | 377,552 | $94.6M | 0.02% | −67,308−15.1% | Reduced |
| Bank of America Corp | 381,813 | $95.7M | 0.01% | −150,033−28.2% | Reduced |
| State Farm Mutual Automobile Insurance Co | 388,239 | $97.3M | 0.08% | 00.0% | Unchanged |
| American Century Companies Inc | 399,700 | $100.2M | 0.05% | −45,784−10.3% | Reduced |
| Vanguard Fiduciary Trust Co | 405,104 | $101.5M | 0.03% | +405,104 | New |
| Nuveen, LLC | 408,990 | $102.5M | 0.03% | +4,668+1.2% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 416,948 | $104.5M | 0.29% | +121,920+41.3% | Added |
| Deutsche Bank AG | 418,854 | $105.0M | 0.03% | +45,979+12.3% | Added |
| Gates Foundation TrustSuperinvestorGates Foundation Trust | 444,500 | $111.4M | 0.35% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 461,462 | $115.6M | 0.02% | +24,102+5.5% | Added |
| Legal & General Group Plc | 506,458 | $126.9M | 0.03% | +3,772+0.8% | Added |
| Arrowstreet Capital, Limited Partnership | 510,516 | $128.0M | 0.07% | +210,112+69.9% | Added |
| Price T Rowe Associates Inc | 526,383 | $131.9M | 0.02% | +187,116+55.2% | Added |
| SEI Investments Co | 529,261 | $132.7M | 0.12% | −62,496−10.6% | Reduced |
| Epoch Investment Partners, Inc. | 545,050 | $136.6M | 0.83% | +39,745+7.9% | Added |
| Charles Schwab Investment Management Inc | 554,332 | $138.9M | 0.02% | +11,529+2.1% | Added |
| Capital Research Global Investors | 604,011 | $151.4M | 0.02% | +604,011 | New |
| Findlay Park Partners LLP | 616,766 | $154.6M | 2.15% | −50,160−7.5% | Reduced |
| Amundi | 644,065 | $161.4M | 0.04% | +296,639+85.4% | Added |
| ProShare Advisors LLC | 660,084 | $165.4M | 0.24% | +73,237+12.5% | Added |
| Jacobs Levy Equity Management, Inc | 705,336 | $176.8M | 0.74% | +65,775+10.3% | Added |
| Van Eck Associates Corp | 713,579 | $178.9M | 0.13% | −2,508−0.4% | Reduced |
| Goldman Sachs Group Inc | 727,617 | $182.4M | 0.02% | +287,572+65.4% | Added |
| Northern Trust Corp | 731,283 | $183.3M | 0.02% | +4,771+0.7% | Added |
| TD Asset Management Inc | 768,953 | $192.7M | 0.16% | +163,227+26.9% | Added |
| Kayne Anderson Rudnick Investment Management LLC | 858,298 | $215.1M | 0.63% | −96,851−10.1% | Reduced |
| UBS Asset Management Americas Inc | 902,764 | $226.3M | 0.05% | −2,892−0.3% | Reduced |
| JPMorgan Chase & Co | 1,043,417 | $255.8M | 0.02% | +768,457+279.5% | Added |
| Invesco Ltd. | 1,056,007 | $264.7M | 0.03% | +147,382+16.2% | Added |
| APG Asset Management N.V. | 1,267,282 | $275.7M | 0.87% | +68,277+5.7% | Added |
| FMR LLC | 1,249,748 | $313.2M | 0.02% | +1,140,094+1,039.7% | Added |
| Longview Partners (Guernsey) LTD | 1,315,403 | $329.7M | 4.67% | +184,377+16.3% | Added |
| Brown Advisory Inc | 1,340,877 | $336.1M | 0.55% | −602,729−31.0% | Reduced |
| Morgan Stanley | 1,458,282 | $365.5M | 0.02% | −73,576−4.8% | Reduced |
| Geode Capital Management, LLC | 1,912,455 | $477.5M | 0.03% | +43,369+2.3% | Added |
| Generation Investment Management LLP | 2,243,976 | $562.4M | 5.04% | +682,107+43.7% | Added |
| T. Rowe Price Investment Management, Inc. | 2,340,403 | $586.6M | 0.40% | +1,165,441+99.2% | Added |
| Bank of New York Mellon Corp | 2,465,858 | $618.0M | 0.11% | −196,177−7.4% | Reduced |
| Artisan Partners Limited Partnership | 2,657,893 | $666.2M | 1.09% | −192,508−6.8% | Reduced |
| State Street Corp | 3,293,778 | $825.6M | 0.03% | +41,758+1.3% | Added |
| Vanguard Portfolio Management LLC | 4,094,009 | $1.03B | 0.05% | +4,094,009 | New |
| Vanguard Capital Management LLC | 4,683,286 | $1.17B | 0.03% | +4,683,286 | New |
| BlackRock, Inc. | 6,836,714 | $1.71B | 0.03% | +236,979+3.6% | Added |
| Steadfast Capital Management LP | 0 | $0 | 0.00% | −429,907−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −134,453−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −127,188−100.0% | Sold out |
| EULAV Asset Management | 0 | $0 | 0.00% | −104,616−100.0% | Sold out |
| Moore Capital Management, LP | 0 | $0 | 0.00% | −95,000−100.0% | Sold out |
| Polar Capital Holdings Plc | 0 | $0 | 0.00% | −69,332−100.0% | Sold out |
| Jennison Associates LLC | 0 | $0 | 0.00% | −54,593−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −45,159−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −43,355−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −35,448−100.0% | Sold out |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 0 | $0 | 0.00% | −34,752−100.0% | Sold out |
| Parnassus Investments | 0 | $0 | 0.00% | −34,387−100.0% | Sold out |
| Dai-Ichi Life Insurance Company, Ltd | 0 | $0 | 0.00% | −29,599−100.0% | Sold out |
| Brasada Capital Management, LP | 0 | $0 | 0.00% | −26,997−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −26,928−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −22,568−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −20,131−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −18,597−100.0% | Sold out |
| Cramer Rosenthal McGlynn LLC | 0 | $0 | 0.00% | −18,387−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −15,314−100.0% | Sold out |
| ING Groep NV | 0 | $0 | 0.00% | −14,853−100.0% | Sold out |
| Syntegra Private Wealth Group, LLC | 0 | $0 | 0.00% | −14,756−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −14,621−100.0% | Sold out |
| Brendel Financial Advisors LLC | 0 | $0 | 0.00% | −13,599−100.0% | Sold out |
| Skandinaviska Enskilda Banken AB (publ) | 0 | $0 | 0.00% | −13,232−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −12,024−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −11,918−100.0% | Sold out |
| Clear Harbor Asset Management, LLC | 0 | $0 | 0.00% | −11,897−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −10,667−100.0% | Sold out |
| Elo Mutual Pension Insurance Co | 0 | $0 | 0.00% | −10,578−100.0% | Sold out |
| Park Avenue Securities LLC | 0 | $0 | 0.00% | −9,724−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −9,108−100.0% | Sold out |
| Rhenman & Partners Asset Management AB | 0 | $0 | 0.00% | −7,000−100.0% | Sold out |
| Virtus Investment Advisers, Inc. | 0 | $0 | 0.00% | −6,728−100.0% | Sold out |
| Radnor Capital Management, LLC | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −5,347−100.0% | Sold out |
| CAPROCK Group, Inc. | 0 | $0 | 0.00% | −5,078−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −4,640−100.0% | Sold out |
| Kentucky Retirement Systems | 0 | $0 | 0.00% | −4,494−100.0% | Sold out |
| Sciencast Management LP | 0 | $0 | 0.00% | −4,421−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −3,513−100.0% | Sold out |
| Harvest Fund Management Co., Ltd | 0 | $0 | 0.00% | −2,705−100.0% | Sold out |
| Everence Capital Management Inc | 0 | $0 | 0.00% | −2,525−100.0% | Sold out |
| R Squared Ltd | 0 | $0 | 0.00% | −2,417−100.0% | Sold out |
| Polymer Capital Management (US) LLC | 0 | $0 | 0.00% | −2,259−100.0% | Sold out |