WEST PHARMACEUTICAL SERVICES (WST) Institutional Ownership Changes & 13F Activity

WEST PHARMACEUTICAL SERVICES (WST). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Viking Global Investors, Renaissance Technologies LLC, Sequoia Financial Advisors, Hillman Value Fund, and Parnassus Endeavor Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Viking Global InvestorsBuy121,920416,948$104,503,847
Q1 2026Renaissance Technologies LLCBuy104,924209,660$52,549,182
Q1 2026Sequoia Financial AdvisorsSell-3793,325$833,382
Q4 2025Viking Global InvestorsBuy295,028295,028$81,174,004
Q4 2025Renaissance Technologies LLCBuy80,436104,736$28,817,063
Q4 2025Hillman Value FundSell-1,3678,906$2,450,397
Q4 2025Sequoia Financial AdvisorsBuy8303,704$1,019,122
Q4 2025Parnassus Endeavor FundBuy81934,387$9,461,239
Q3 2025Durable Capital PartnersBuy131,9351,172,583$307,603,698
Q3 2025Parnassus Endeavor FundSell-35,68033,568$8,805,893
Q3 2025Hillman Value FundBuy10,27310,273$2,694,916
Q3 2025Sequoia Financial AdvisorsBuy5182,874$753,939
Q2 2025Durable Capital PartnersSell-532,4711,040,648$227,693,782
Q2 2025Renaissance Technologies LLCSell-270,40024,300$5,316,840
Q2 2025Parnassus Endeavor FundBuy6,76969,248$15,151,462
Q2 2025Sequoia Financial AdvisorsBuy1,1922,356$515,501
Q1 2025Durable Capital PartnersBuy935,7211,573,119$352,189,882
Q1 2025Bill & Melinda Gates Foundation TrustBuy444,500444,500$99,514,660
Q1 2025Sequoia Financial AdvisorsSell-1701,164$260,605
Q4 2024Durable Capital PartnersSell-448,521637,398$208,786,089
Q4 2024Parnassus Endeavor FundBuy4,09062,479$20,465,621
Q4 2024Sequoia Financial AdvisorsBuy2601,334$437,032
Q3 2024Durable Capital PartnersBuy45,3951,085,919$325,949,447
Q3 2024Parnassus Endeavor FundBuy20,37658,389$17,526,042
Q3 2024Sequoia Financial AdvisorsSell-1211,074$322,423
Q2 2024Parnassus Endeavor FundBuy38,01338,013$12,521,102
Q2 2024Durable Capital PartnersBuy9,4711,040,524$342,738,200
Q2 2024Sequoia Financial AdvisorsBuy831,195$393,677
Q1 2024Durable Capital PartnersSell-107,6771,031,053$407,997,983
Q1 2024Sequoia Financial AdvisorsSell-5491,112$439,954

Frequently asked questions about WST activity

  • Which institutional owners are buying WST?

    Institutional owners buying WST include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in WST activity?

    "Buy" means an investor increased their reported position in WST compared to the prior reporting period. This reflects growing exposure to WEST PHARMACEUTICAL SERVICES (WST) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in WST increasing?

    Institutional interest in WST can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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