Observatory · observe first
West Pharmaceutical Services
WST · United States · Health Care Supplies · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.088%
12M weight contribution
-0.015 pp
3M weight contribution
+0.025 pp
12M price return
-15.4%
Share of matched S&P 500 members
Monthly observations through Mar 2023
Company price index
A separate dimension from market allocation
Historical observations
Most recent 24 observations at or before the selected month
| Month | Market cap | Universe weight | 12M weight change | 12M return | Above 6M weight average |
|---|---|---|---|---|---|
| Mar 2023 | $25.7bn | 0.088% | -0.015 pp | -15.4% | Yes |
| Feb 2023 | $23.5bn | 0.083% | -0.017 pp | -17.9% | Yes |
| Jan 2023 | $19.7bn | 0.067% | -0.031 pp | -32.3% | Yes |
| Dec 2022 | $17.4bn | 0.063% | -0.048 pp | -49.7% | No |
| Nov 2022 | $17.4bn | 0.059% | -0.052 pp | -46.9% | No |
| Oct 2022 | $17.0bn | 0.060% | -0.046 pp | -46.4% | No |
| Sep 2022 | $18.2bn | 0.072% | -0.039 pp | -41.9% | No |
| Aug 2022 | $22.0bn | 0.079% | -0.033 pp | -34.2% | No |
| Jul 2022 | $25.4bn | 0.087% | -0.017 pp | -16.4% | No |
| Jun 2022 | $22.4bn | 0.087% | -0.006 pp | -15.6% | No |
| May 2022 | $23.0bn | 0.083% | -0.009 pp | -10.5% | No |
| Apr 2022 | $23.3bn | 0.084% | -0.004 pp | -3.9% | No |
| Mar 2022 | $30.5bn | 0.103% | +0.062 pp | +46.0% | No |
| Feb 2022 | $28.8bn | 0.100% | +0.058 pp | +38.2% | No |
| Jan 2022 | $29.1bn | 0.098% | +0.045 pp | +31.5% | No |
| Dec 2021 | $34.7bn | 0.111% | +0.027 pp | +65.9% | Yes |
| Nov 2021 | $32.8bn | 0.111% | +0.024 pp | +61.2% | Yes |
| Oct 2021 | $31.8bn | 0.106% | +0.011 pp | +58.3% | Yes |
| Sep 2021 | $31.4bn | 0.110% | +0.110 pp | +54.8% | Yes |
| Aug 2021 | $33.4bn | 0.112% | +0.112 pp | +59.4% | Yes |
| Jul 2021 | $30.5bn | 0.104% | +0.104 pp | +53.5% | Yes |
| Jun 2021 | $26.5bn | 0.094% | +0.093 pp | +58.4% | Yes |
| May 2021 | $25.7bn | 0.092% | +0.092 pp | +61.2% | Yes |
| Apr 2021 | $24.3bn | 0.088% | +0.088 pp | +74.0% | Yes |
Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.