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
0.080%
12M weight contribution
-0.007 pp
3M weight contribution
+0.003 pp
12M price return
+14.5%
Share of matched S&P 500 members
Monthly observations through Mar 2024
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 2024 | $29.0bn | 0.080% | -0.007 pp | +14.5% | Yes |
| Feb 2024 | $26.3bn | 0.075% | -0.007 pp | +13.3% | No |
| Jan 2024 | $27.6bn | 0.082% | +0.015 pp | +40.8% | No |
| Dec 2023 | $26.1bn | 0.078% | +0.015 pp | +50.0% | No |
| Nov 2023 | $26.0bn | 0.081% | +0.022 pp | +49.8% | Yes |
| Oct 2023 | $23.6bn | 0.080% | +0.020 pp | +38.7% | Yes |
| Sep 2023 | $27.7bn | 0.093% | +0.021 pp | +52.9% | Yes |
| Aug 2023 | $30.1bn | 0.096% | +0.017 pp | +37.5% | Yes |
| Jul 2023 | $27.2bn | 0.059% | -0.028 pp | +7.4% | No |
| Jun 2023 | $28.4bn | 0.066% | -0.021 pp | +26.8% | No |
| May 2023 | $24.8bn | 0.061% | -0.021 pp | +8.1% | No |
| Apr 2023 | $26.8bn | 0.091% | +0.006 pp | +15.0% | Yes |
| 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 |
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.