WST
West Pharmaceutical Services
3 of the 83 super-investors we track hold WST, worth a combined $289M per their latest 13F filings. The largest position: Hillman Capital Management at 1.8% of their portfolio. No cohort buying or selling was filed on the name this quarter. Conviction score: 25 of 100 (how strongly the cohort backs it) — ranked #559 of 742 stocks. The stock is up 7.9x since a tracked investor first held it at conviction size (Q1 2014 or earlier). Conviction easing: 1 fewer super-investor hold it than in 2026Q1.
Held through it: Henry Ellenbogen (23q straight), Joel Greenblatt (20q straight), Hillman Capital Management (3q straight). All multibaggers the cohort held →
Why super-investors own WST
WST is held by 3 super-investors in our cohort, with a combined position value of $289M. The highest-conviction owner is Hillman Capital Management at 1.8% of their portfolio. Cohort ownership has shrunk from 4 to 3 over the last four quarters — net interest is fading.
AI-synthesized from 13F filings. Not investment advice.
Cohort owners over time
2016Q3 → 2026Q2How many of the cohort members held this stock each quarter.
Owners (3) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Bill & Melinda Gates Foundation Trust | 0.5% | 6q | $160M | 444,500 |
| 2 | Joel Greenblatt | 0.1% | 39q | $127M | 352,769 |
| 3 | Hillman Capital Management | 1.8% | 4q | $3M | 7,106 |
Owners of WST also hold
Congress is trading WST
Congress tracker →- Lisa McClainsold$1,001 - $15,000 · 2025-07-22
- Lisa McClainbought$1,001 - $15,000 · 2025-06-17 · late
- Rob Bresnahansold$1,001 - $15,000 · 2025-04-08
- Rob Bresnahanbought$1,001 - $15,000 · 2025-02-25
- Jared Moskowitzsold$1,001 - $15,000 · 2025-02-13
- Jared Moskowitzsold$1,001 - $15,000 · 2024-11-08
STOCK Act periodic transaction reports; amounts are disclosed ranges. Who files late →
Long US equity 13F-HR filings only. CUSIP 955306105. Not investment advice.