West Pharmaceutical Services (WST) Held by Superinvestors
WEST PHARMACEUTICAL SERVICES (WST) is currently held by 4 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $174.34M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Bill & Melinda Gates Foundation Trust is currently the largest disclosed institutional shareholder of WST tracked by InsiderSet, reporting ownership valued at approximately $159.58M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $172.81M, representing an estimated gain of +8.30% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed WST value among the investors covered in this analysis. Major shareholders include Bill & Melinda Gates Foundation Trust, Renaissance Technologies LLC, Hillman Value Fund, and several other long-term asset managers with concentrated positions in WEST PHARMACEUTICAL SERVICES (WST).
This page ranks the largest institutional WST shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Bill & Melinda Gates Foundation Trust | Bill Gates | 0.46% | 444,500 | $159,575,500 | $172,812,710 | +$13,237,210 | +8.30% |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 30,900 | $11,093,100 | $12,013,302 | +$920,202 | +8.30% |
| Hillman Value Fund | Mark A. Hillman | 1.85% | 7,106 | $2,551,054 | $2,762,671 | +$211,617 | +8.30% |
| Sequoia Financial Advisors | 0.01% | 3,111 | $1,116,918 | $1,209,495 | +$92,577 | +8.29% |
Frequently asked questions about WST
Who are the largest superinvestors holding WST?
The largest superinvestors holding WST in the latest SEC Form 13F filings include Bill & Melinda Gates Foundation Trust, Renaissance Technologies LLC, Hillman Value Fund, and Sequoia Financial Advisors. InsiderSet ranks these superinvestors by their latest reported WST position.
What does the WST superinvestors page include?
This page tracks WST positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. WEST PHARMACEUTICAL SERVICES (WST) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold WST?
InsiderSet currently tracks 4 superinvestors reporting WST holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own WST.
How much WST stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $174.34M in WST holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were WST superinvestor holdings last updated?
The latest WST superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor WST holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its WST position after the reporting date.
Are superinvestors buying or selling WST?
Buying and selling can be analyzed by comparing WST positions across consecutive 13F reporting periods. InsiderSet's WST Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View WST ownership changes.
How have superinvestor WST holdings changed over time?
InsiderSet tracks WST holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.