WEST PHARMACEUTICAL SVSC INC WST
COM · Common Stock · CUSIP 955306105 · ISIN US9553061055
- SectorHealth care
- IndustrySurgical & Medical Instruments & Apparatus
- HeadquartersExton, PA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($59.4m this quarter). Holder counts are more reliable. Shares outstanding: 70.6m as of 2026-04-20, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $249.88. Options: 11 managers hold calls ($60.5m notional), 9 hold puts ($125.9m).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 640 |
| Q4 2022 | 637 |
| Q1 2023 | 698 |
| Q2 2023 | 736 |
| Q3 2023 | 760 |
| Q4 2023 | 785 |
| Q1 2024 | 779 |
| Q2 2024 | 779 |
| Q3 2024 | 734 |
| Q4 2024 | 748 |
| Q1 2025 | 718 |
| Q2 2025 | 734 |
| Q3 2025 | 759 |
| Q4 2025 | 804 |
| Q1 2026 | 755 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 353 | 372 |
| Q3 2024 | 348 | 371 |
| Q4 2024 | 356 | 340 |
| Q1 2025 | 356 | 373 |
| Q2 2025 | 361 | 344 |
| Q3 2025 | 381 | 329 |
| Q4 2025 | 352 | 349 |
| Q1 2026 | 339 | 410 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $82.3m | $32.1m | 0.39 |
| Q3 2025 | $76.9m | $25.8m | 0.34 |
| Q4 2025 | $39.6m | $24.1m | 0.61 |
| Q1 2026 | $60.5m | $125.9m | 2.08 |
Biggest buyers
| FMR LLC | Added | +1.1m |
| JPMORGAN CHASE & CO | Added | +768.5k |
| GENERATION INVESTMENT MANAGEMENT LLP | Added | +682.1k |
| Capital Research Global Investors | New | +604.0k |
| T. Rowe Price Investment Management, Inc. | Added | +372.8k |
| Amundi | Added | +296.6k |
| GOLDMAN SACHS GROUP INC | Added | +287.6k |
| Stonehage Fleming Financial Services Holdings Ltd | New | +254.8k |
| WORLDQUANT MILLENNIUM ADVISORS LLC | Added | +253.9k |
| BlackRock, Inc. | Added | +237.0k |
Biggest sellers
| FRANKLIN RESOURCES INC | Reduced | -876.6k |
| BROWN ADVISORY INC | Reduced | -602.7k |
| STEADFAST CAPITAL MANAGEMENT LP | Sold out | -429.9k |
| Champlain Investment Partners, LLC | Reduced | -269.4k |
| AQR CAPITAL MANAGEMENT LLC | Reduced | -250.7k |
| NEUBERGER BERMAN GROUP LLC | Reduced | -245.7k |
| DF DENT & CO INC | Reduced | -199.0k |
| Bank of New York Mellon Corp | Reduced | -196.2k |
| Artisan Partners Limited Partnership | Reduced | -192.5k |
| BANK OF AMERICA CORP /DE/ | Reduced | -150.0k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $23.6m94.3k shares |
| JANE STREET GROUP, LLC | Added | $8.7m34.8k shares |
| CITADEL ADVISORS LLC | Added | $7.7m30.7k shares |
| PEAK6 LLC | Added | $5.0m20.0k shares |
| Oribel Capital Management, LP | New | $4.5m17.8k shares |
| SIMPLEX TRADING, LLC | New | $4.2m16.9k shares |
| UBS Group AG | Unchanged | $3.5m14.0k shares |
| IMC-Chicago, LLC | New | $2.1m8.2k shares |
| BOOTHBAY FUND MANAGEMENT, LLC | New | $802.0k3.2k shares |
| BANK OF MONTREAL /CAN/ | New | $300.8k1.2k shares |
Biggest puts
| Point72 Asset Management, L.P. | Added | $97.0m387.1k shares |
| BARCLAYS PLC | Unchanged | $12.5m50.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $9.1m36.3k shares |
| CITADEL ADVISORS LLC | Added | $2.9m11.6k shares |
| JANE STREET GROUP, LLC | Added | $1.8m7.3k shares |
| IMC-Chicago, LLC | New | $1.4m5.4k shares |
| PEAK6 LLC | Added | $501.3k2.0k shares |
| SIMPLEX TRADING, LLC | New | $325.8k1.3k shares |
| BANK OF MONTREAL /CAN/ | New | $300.8k1.2k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-04-24 | 8.4% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 7.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.7% |
Fell to 5% or below in the last year: FMR LLC (5.0%, 2026-08-06), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 0 | — | 3 | $25.0m | $24.2m |
| Q3 2024 | 0 | — | 2 | $9.7m | $9.4m |
| Q4 2024 | 0 | — | 1 | $218.2k | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
None reported in Q1 2026.
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.03% of their portfolio | 6.8m $1.7bn | Added +237.0k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 4.7m $1.2bn | First filing |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.05% of their portfolio | 4.1m $1.0bn | First filing |
| STATE STREET CORP 0.03% of their portfolio | 3.3m $825.6m | Added +41.8k |
| Artisan Partners Limited Partnership 1.09% of their portfolio | 2.7m $666.2m | Reduced -192.5k |
| Bank of New York Mellon Corp 0.11% of their portfolio | 2.5m $618.0m | Reduced -196.2k |
| T. Rowe Price Investment Management, Inc. 0.40% of their portfolio | 2.3m $586.6m | Added +372.8k |
| GENERATION INVESTMENT MANAGEMENT LLP 5.04% of their portfolio | 2.2m $562.4m | Added +682.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 1.9m $477.5m | Added +43.4k |
| MORGAN STANLEY 0.02% of their portfolio | 1.5m $365.5m | Reduced -73.6k |
| BROWN ADVISORY INC 0.55% of their portfolio | 1.3m $336.1m | Reduced -602.7k |
| Longview Partners (Guernsey) LTD 4.67% of their portfolio | 1.3m $329.7m | Added +184.4k |
| APG Asset Management N.V. 0.87% of their portfolio | 1.3m $275.7m | Added +68.3k |
| FMR LLC 0.02% of their portfolio | 1.2m $313.2m | Added +1.1m |
| Invesco Ltd. 0.03% of their portfolio | 1.1m $264.7m | Added +147.4k |
| JPMORGAN CHASE & CO 0.02% of their portfolio | 1.0m $255.8m | Added +768.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.05% of their portfolio | 902.8k $226.3m | Reduced -2.9k |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 0.63% of their portfolio | 858.3k $215.1m | Reduced -96.9k |
| TD Asset Management Inc 0.16% of their portfolio | 769.0k $192.7m | Added +163.2k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 731.3k $183.3m | Added +4.8k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 727.6k $182.4m | Added +287.6k |
| VAN ECK ASSOCIATES CORP 0.13% of their portfolio | 713.6k $178.9m | Reduced -2.5k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.74% of their portfolio | 705.3k $176.8m | Added +65.8k |
| ProShare Advisors LLC 0.24% of their portfolio | 660.1k $165.4m | Added +73.2k |
| Amundi 0.04% of their portfolio | 644.1k $161.4m | Added +296.6k |
| Findlay Park Partners LLP 2.15% of their portfolio | 616.8k $154.6m | Reduced -50.2k |
| Capital Research Global Investors 0.02% of their portfolio | 604.0k $151.4m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 554.3k $138.9m | Added +11.5k |
| Epoch Investment Partners, Inc. 0.83% of their portfolio | 545.0k $136.6m | Added +39.7k |
| SEI INVESTMENTS CO 0.12% of their portfolio | 529.3k $132.7m | Reduced -62.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio | 526.4k $131.9m | Added +187.1k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.07% of their portfolio | 510.5k $128.0m | Added +210.1k |
| Legal & General Group Plc 0.03% of their portfolio | 506.5k $126.9m | Added +3.8k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 461.5k $115.6m | Added +24.1k |
| GATES FOUNDATION TRUST 0.35% of their portfolio | 444.5k $111.4m | Unchanged |
| DEUTSCHE BANK AG\ 0.03% of their portfolio | 418.9k $105.0m | Added +46.0k |
| VIKING GLOBAL INVESTORS LP 0.29% of their portfolio | 416.9k $104.5m | Added +121.9k |
| Nuveen, LLC 0.03% of their portfolio | 409.0k $102.5m | Added +4.7k |
| VANGUARD FIDUCIARY TRUST CO 0.03% of their portfolio | 405.1k $101.5m | First filing |
| AMERICAN CENTURY COMPANIES INC 0.05% of their portfolio | 399.7k $100.2m | Reduced -45.8k |
| STATE FARM MUTUAL AUTOMOBILE INSURANCE CO 0.08% of their portfolio | 388.2k $97.3m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 381.8k $95.7m | Reduced -150.0k |
| ROYAL BANK OF CANADA 0.02% of their portfolio | 377.6k $94.6m | Reduced -67.3k |
| BARCLAYS PLC 0.03% of their portfolio | 349.1k $87.5m | Added +206.9k |
| Liontrust Investment Partners LLP 1.44% of their portfolio | 337.0k $84.5m | Reduced -29.2k |
| CITADEL ADVISORS LLC 0.06% of their portfolio | 323.6k $81.1m | Added +77.9k |
| BNP PARIBAS FINANCIAL MARKETS 0.05% of their portfolio | 313.6k $78.6m | Added +100.3k |
| JANE STREET GROUP, LLC 0.08% of their portfolio | 305.1k $76.5m | Added +85.4k |
| UBS Group AG 0.01% of their portfolio | 275.5k $69.1m | Added +25.1k |
| WORLDQUANT MILLENNIUM ADVISORS LLC 0.26% of their portfolio | 268.1k $67.2m | Added +253.9k |
| AQR CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 266.9k $66.5m | Reduced -250.7k |
| RIVERBRIDGE PARTNERS LLC 1.60% of their portfolio | 261.4k $65.5m | Reduced -57.2k |
| RHUMBLINE ADVISERS 0.06% of their portfolio | 259.2k $65.0m | Reduced -13.0k |
| Stonehage Fleming Financial Services Holdings Ltd 2.32% of their portfolio | 254.8k $63.9m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 248.6k $62.3m | Added +232.8k |
| ENVESTNET ASSET MANAGEMENT INC 0.02% of their portfolio | 235.5k $59.0m | Reduced -12.6k |
| California Public Employees Retirement System 0.04% of their portfolio | 232.9k $58.4m | Added +109.6k |
| BROWN BROTHERS HARRIMAN & CO 0.31% of their portfolio | 228.4k $57.2m | Reduced -12.3k |
| Border to Coast Pensions Partnership Ltd 0.96% of their portfolio | 226.9k $57.0m | Reduced -9.4k |
| Seilern Investment Management Ltd 6.76% of their portfolio | 226.0k $56.6m | Reduced -52.2k |
| TWO SIGMA INVESTMENTS, LP 0.05% of their portfolio | 225.6k $56.6m | Added +85.7k |
| Swiss National Bank 0.03% of their portfolio | 211.2k $52.9m | Added +14.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.08% of their portfolio | 209.7k $52.5m | Added +104.9k |
| FEDERATED HERMES, INC. 0.08% of their portfolio | 208.2k $52.2m | Added +8.1k |
| Champlain Investment Partners, LLC 0.66% of their portfolio | 206.0k $51.6m | Reduced -269.4k |
| Holocene Advisors, LP 0.12% of their portfolio | 203.6k $51.0m | Added +75.9k |
| LGT Group Foundation 0.62% of their portfolio | 203.6k $51.0m | Reduced -1.5k |
| Vest Financial, LLC 0.61% of their portfolio | 202.9k $50.9m | Added +24.9k |
| BAMCO INC /NY/ 0.15% of their portfolio | 199.8k $50.1m | Reduced -63.4k |
| Russell Investments Group, Ltd. 0.05% of their portfolio | 195.3k $48.9m | Added +23.2k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.03% of their portfolio | 182.1k $45.6m | Added +14.9k |
| NEUBERGER BERMAN GROUP LLC 0.03% of their portfolio | 181.9k $45.6m | Reduced -245.7k |
| Allianz Asset Management GmbH 0.05% of their portfolio | 176.6k $44.3m | Added +152.3k |
| NOMURA ASSET MANAGEMENT CO LTD 0.11% of their portfolio | 174.3k $43.7m | Added +19.8k |
| Sumitomo Mitsui Trust Group, Inc. 0.03% of their portfolio | 172.8k $43.3m | Reduced -3.3k |
| Quantinno Capital Management LP 0.07% of their portfolio | 161.5k $40.5m | Added +56.1k |
| Birch Hill Investment Advisors LLC 1.81% of their portfolio | 161.2k $40.4m | Added +9.0k |
| Point72 Asset Management, L.P. 0.07% of their portfolio | 159.3k $39.9m | Reduced -75.7k |
| Vanguard Global Advisers, LLC 0.02% of their portfolio | 157.7k $39.5m | First filing |
| HSBC HOLDINGS PLC 0.02% of their portfolio | 156.9k $39.3m | Reduced -136.8k |
| AMI ASSET MANAGEMENT CORP 2.47% of their portfolio | 154.4k $38.7m | Reduced -4.6k |
| CITIGROUP INC 0.02% of their portfolio | 142.4k $35.7m | Reduced -3.2k |
| Assenagon Asset Management S.A. 0.06% of their portfolio | 137.6k $34.5m | Reduced -113.4k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio | 135.4k $33.9m | Added +21.0k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.03% of their portfolio | 135.0k $33.1m | Reduced -44.2k |
| Conestoga Capital Advisors, LLC 0.66% of their portfolio | 131.0k $32.8m | Added +8.2k |
| BANK OF MONTREAL /CAN/ 0.01% of their portfolio | 127.2k $31.9m | Reduced -5.5k |
| VANGUARD ASSET MANAGEMENT, Ltd 0.03% of their portfolio | 124.6k $31.2m | First filing |
| Local Pensions Partnership Investment Ltd 0.66% of their portfolio | 120.9k $30.3m | Unchanged |
| DF DENT & CO INC 0.58% of their portfolio | 120.6k $30.2m | Reduced -199.0k |
| Ninety One UK Ltd 0.07% of their portfolio | 119.2k $29.9m | Added +17.3k |
| SG Americas Securities, LLC 0.03% of their portfolio | 114.0k $28.6m | Added +13.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.03% of their portfolio | 110.6k $27.7m | Reduced -2.9k |
| Nan Shan Life Insurance Co., Ltd. 1.00% of their portfolio | 109.9k $27.5m | Unchanged |
| ROYAL LONDON ASSET MANAGEMENT LTD 0.05% of their portfolio | 99.5k $25.0m | Added +7.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 97.0k $24.3m | Reduced -9.7k |
| PRUDENTIAL FINANCIAL INC 0.03% of their portfolio | 96.4k $24.2m | Reduced -66.7k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 87.3k $24.0m | Added +7.3k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 85.4k $21.4m | Reduced -270 |
| Creative Planning 0.01% of their portfolio | 83.4k $20.9m | Added +3.9k |