WST
West Pharmaceutical Services
4 super-investors hold WST worth a combined $299M. The largest position: Hillman Capital Management at 1.6% of their portfolio. No cohort buying or selling was filed on the name this quarter. Cohort Conviction Score: 23 — ranked #601 of 724 scored stocks.
Why super-investors own WST
Super-investor interest in WST is narrow and static: four cohort members hold a combined $299M, but conviction is modest — the highest portfolio concentration is just 1.6%, held by Hillman Capital Management ($2M). The Gates Foundation Trust is the largest holder by dollar value at $111M (0.4% of portfolio), followed by Viking Global Investors at $105M and Joel Greenblatt at $81M. In 2026Q1, no one in the cohort added, trimmed, started, or exited a position. The eight-quarter owner-count trend — which peaked at two and recently slipped back to one before re-expanding to four — suggests interest has stabilized at a low level rather than building meaningfully, with no current momentum in either direction.
AI-synthesized from 13F filings. Not investment advice.
Cohort owners over time
2020Q1 → 2026Q1How many of the cohort members held this stock each quarter.
Owners (4) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Bill & Melinda Gates Foundation Trust | 0.4% | 5q | $111M | 444,500 |
| 2 | Viking Global Investors | 0.3% | 2q | $105M | 416,948 |
| 3 | Joel Greenblatt | 0.1% | 38q | $81M | 323,587 |
| 4 | Hillman Capital Management | 1.6% | 3q | $2M | 8,906 |
Owners of WST also hold
Long US equity 13F-HR filings only. CUSIP 955306105. Not investment advice.