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; 833 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 | 833 | $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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6,836,714 | $1.71B | 0.03% | +236,979+3.6% | Added |
| Vanguard Capital Management LLC | 4,683,286 | $1.17B | 0.03% | +4,683,286 | New |
| Vanguard Portfolio Management LLC | 4,094,009 | $1.03B | 0.05% | +4,094,009 | New |
| State Street Corp | 3,293,778 | $825.6M | 0.03% | +41,758+1.3% | Added |
| Artisan Partners Limited Partnership | 2,657,893 | $666.2M | 1.09% | −192,508−6.8% | Reduced |
| Bank of New York Mellon Corp | 2,465,858 | $618.0M | 0.11% | −196,177−7.4% | Reduced |
| T. Rowe Price Investment Management, Inc. | 2,340,403 | $586.6M | 0.40% | +1,165,441+99.2% | Added |
| Generation Investment Management LLP | 2,243,976 | $562.4M | 5.04% | +682,107+43.7% | Added |
| Geode Capital Management, LLC | 1,912,455 | $477.5M | 0.03% | +43,369+2.3% | Added |
| Morgan Stanley | 1,458,282 | $365.5M | 0.02% | −73,576−4.8% | Reduced |
| Brown Advisory Inc | 1,340,877 | $336.1M | 0.55% | −602,729−31.0% | Reduced |
| Longview Partners (Guernsey) LTD | 1,315,403 | $329.7M | 4.67% | +184,377+16.3% | Added |
| FMR LLC | 1,249,748 | $313.2M | 0.02% | +1,140,094+1,039.7% | Added |
| APG Asset Management N.V. | 1,267,282 | $275.7M | 0.87% | +68,277+5.7% | Added |
| Invesco Ltd. | 1,056,007 | $264.7M | 0.03% | +147,382+16.2% | Added |
| JPMorgan Chase & Co | 1,043,417 | $255.8M | 0.02% | +768,457+279.5% | Added |
| UBS Asset Management Americas Inc | 902,764 | $226.3M | 0.05% | −2,892−0.3% | Reduced |
| Kayne Anderson Rudnick Investment Management LLC | 858,298 | $215.1M | 0.63% | −96,851−10.1% | Reduced |
| TD Asset Management Inc | 768,953 | $192.7M | 0.16% | +163,227+26.9% | Added |
| Northern Trust Corp | 731,283 | $183.3M | 0.02% | +4,771+0.7% | Added |
| Goldman Sachs Group Inc | 727,617 | $182.4M | 0.02% | +287,572+65.4% | Added |
| Van Eck Associates Corp | 713,579 | $178.9M | 0.13% | −2,508−0.4% | Reduced |
| Jacobs Levy Equity Management, Inc | 705,336 | $176.8M | 0.74% | +65,775+10.3% | Added |
| ProShare Advisors LLC | 660,084 | $165.4M | 0.24% | +73,237+12.5% | Added |
| Amundi | 644,065 | $161.4M | 0.04% | +296,639+85.4% | Added |
| Findlay Park Partners LLP | 616,766 | $154.6M | 2.15% | −50,160−7.5% | Reduced |
| Capital Research Global Investors | 604,011 | $151.4M | 0.02% | +604,011 | New |
| Charles Schwab Investment Management Inc | 554,332 | $138.9M | 0.02% | +11,529+2.1% | Added |
| Epoch Investment Partners, Inc. | 545,050 | $136.6M | 0.83% | +39,745+7.9% | Added |
| SEI Investments Co | 529,261 | $132.7M | 0.12% | −62,496−10.6% | Reduced |
| Price T Rowe Associates Inc | 526,383 | $131.9M | 0.02% | +187,116+55.2% | Added |
| Arrowstreet Capital, Limited Partnership | 510,516 | $128.0M | 0.07% | +210,112+69.9% | Added |
| Legal & General Group Plc | 506,458 | $126.9M | 0.03% | +3,772+0.8% | Added |
| Dimensional Fund Advisors LP | 461,462 | $115.6M | 0.02% | +24,102+5.5% | Added |
| Gates Foundation TrustSuperinvestorGates Foundation Trust | 444,500 | $111.4M | 0.35% | 00.0% | Unchanged |
| Deutsche Bank AG | 418,854 | $105.0M | 0.03% | +45,979+12.3% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 416,948 | $104.5M | 0.29% | +121,920+41.3% | Added |
| Nuveen, LLC | 408,990 | $102.5M | 0.03% | +4,668+1.2% | Added |
| Vanguard Fiduciary Trust Co | 405,104 | $101.5M | 0.03% | +405,104 | New |
| American Century Companies Inc | 399,700 | $100.2M | 0.05% | −45,784−10.3% | Reduced |
| State Farm Mutual Automobile Insurance Co | 388,239 | $97.3M | 0.08% | 00.0% | Unchanged |
| Bank of America Corp | 381,813 | $95.7M | 0.01% | −150,033−28.2% | Reduced |
| Royal Bank of Canada | 377,552 | $94.6M | 0.02% | −67,308−15.1% | Reduced |
| Barclays PLC | 349,104 | $87.5M | 0.03% | +206,919+145.5% | Added |
| Liontrust Investment Partners LLP | 336,995 | $84.5M | 1.44% | −29,193−8.0% | Reduced |
| Citadel Advisors LLC | 323,587 | $81.1M | 0.06% | +77,947+31.7% | Added |
| BNP Paribas Arbitrage, SA | 313,594 | $78.6M | 0.05% | +100,261+47.0% | Added |
| Jane Street Group, LLC | 305,132 | $76.5M | 0.08% | +85,386+38.9% | Added |
| UBS Group AG | 275,508 | $69.1M | 0.01% | +25,110+10.0% | Added |
| Worldquant Millennium Advisors LLC | 268,107 | $67.2M | 0.26% | +253,914+1,789.0% | Added |
| AQR Capital Management LLC | 266,944 | $66.5M | 0.03% | −250,687−48.4% | Reduced |
| Riverbridge Partners LLC | 261,442 | $65.5M | 1.60% | −57,171−17.9% | Reduced |
| Rhumbline Advisers | 259,227 | $65.0M | 0.06% | −12,965−4.8% | Reduced |
| Stonehage Fleming Financial Services Holdings Ltd | 254,817 | $63.9M | 2.32% | +254,817 | New |
| Wellington Management Group LLP | 248,636 | $62.3M | 0.01% | +232,776+1,467.7% | Added |
| Envestnet Asset Management Inc | 235,521 | $59.0M | 0.02% | −12,591−5.1% | Reduced |
| California Public Employees Retirement System | 232,917 | $58.4M | 0.04% | +109,581+88.8% | Added |
| Brown Brothers Harriman & Co | 228,415 | $57.2M | 0.31% | −12,276−5.1% | Reduced |
| Border to Coast Pensions Partnership Ltd | 226,857 | $57.0M | 0.96% | −9,450−4.0% | Reduced |
| Seilern Investment Management Ltd | 226,021 | $56.6M | 6.76% | −52,208−18.8% | Reduced |
| Two Sigma Investments, LP | 225,631 | $56.6M | 0.05% | +85,692+61.2% | Added |
| Swiss National Bank | 211,160 | $52.9M | 0.03% | +14,120+7.2% | Added |
| Renaissance Technologies LLC | 209,660 | $52.5M | 0.08% | +104,924+100.2% | Added |
| Federated Hermes, Inc. | 208,161 | $52.2M | 0.08% | +8,095+4.0% | Added |
| Champlain Investment Partners, LLC | 205,979 | $51.6M | 0.66% | −269,376−56.7% | Reduced |
| Holocene Advisors, LP | 203,621 | $51.0M | 0.12% | +75,904+59.4% | Added |
| LGT Group Foundation | 203,556 | $51.0M | 0.62% | −1,531−0.7% | Reduced |
| CBOE Vest Financial, LLC | 202,948 | $50.9M | 0.61% | +24,869+14.0% | Added |
| Bamco Inc | 199,750 | $50.1M | 0.15% | −63,439−24.1% | Reduced |
| Russell Investments Group, Ltd. | 195,332 | $48.9M | 0.05% | +23,230+13.5% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 182,085 | $45.6M | 0.03% | +14,882+8.9% | Added |
| Neuberger Berman Group LLC | 181,853 | $45.6M | 0.03% | −245,659−57.5% | Reduced |
| Allianz Asset Management GmbH | 176,560 | $44.3M | 0.05% | +152,310+628.1% | Added |
| Nomura Asset Management Co Ltd | 174,262 | $43.7M | 0.11% | +19,760+12.8% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 172,780 | $43.3M | 0.03% | −3,336−1.9% | Reduced |
| Quantinno Capital Management LP | 161,478 | $40.5M | 0.07% | +56,072+53.2% | Added |
| Birch Hill Investment Advisors LLC | 161,159 | $40.4M | 1.81% | +9,011+5.9% | Added |
| Point72 Asset Management, L.P. | 159,350 | $39.9M | 0.07% | −75,687−32.2% | Reduced |
| Vanguard Global Advisers, LLC | 157,737 | $39.5M | 0.02% | +157,737 | New |
| HSBC Holdings PLC | 156,895 | $39.3M | 0.02% | +10,023+6.8% | Added |
| Ami Asset Management Corp | 154,401 | $38.7M | 2.47% | −4,638−2.9% | Reduced |
| Citigroup Inc | 142,434 | $35.7M | 0.02% | −3,222−2.2% | Reduced |
| Assenagon Asset Management S.A. | 137,561 | $34.5M | 0.06% | −113,445−45.2% | Reduced |
| Canada Pension Plan Investment Board | 135,370 | $33.9M | 0.02% | +20,960+18.3% | Added |
| Schroder Investment Management Group | 135,006 | $33.1M | 0.03% | −44,167−24.7% | Reduced |
| Conestoga Capital Advisors, LLC | 130,970 | $32.8M | 0.66% | +8,179+6.7% | Added |
| Bank of Montreal | 127,174 | $31.9M | 0.01% | −5,475−4.1% | Reduced |
| Vanguard Asset Management, Ltd | 124,642 | $31.2M | 0.03% | +124,642 | New |
| Local Pensions Partnership Investment Ltd | 120,880 | $30.3M | 0.66% | 00.0% | Unchanged |
| DF Dent & Co Inc | 120,597 | $30.2M | 0.58% | −198,985−62.3% | Reduced |
| Ninety One UK Ltd | 119,231 | $29.9M | 0.07% | +17,343+17.0% | Added |
| SG Americas Securities, LLC | 114,044 | $28.6M | 0.03% | +13,135+13.0% | Added |
| California State Teachers Retirement System | 110,634 | $27.7M | 0.03% | −2,936−2.6% | Reduced |
| Nan Shan Life Insurance Co., Ltd. | 109,867 | $27.5M | 1.00% | 00.0% | Unchanged |
| Royal London Asset Management Ltd | 99,550 | $25.0M | 0.05% | +7,136+7.7% | Added |
| Wells Fargo & Company | 96,974 | $24.3M | 0.00% | −9,737−9.1% | Reduced |
| Prudential Financial Inc | 96,412 | $24.2M | 0.03% | −66,679−40.9% | Reduced |
| Alliancebernstein L.P. | 87,301 | $24.0M | 0.01% | +7,258+9.1% | Added |
| Principal Financial Group Inc | 85,363 | $21.4M | 0.01% | −270−0.3% | Reduced |
| Creative Planning | 83,372 | $20.9M | 0.01% | +3,870+4.9% | Added |