Observatory · observe first
Boston Scientific
BSX · United States · Health Care Equipment · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.265%
12M weight contribution
-0.070 pp
3M weight contribution
-0.027 pp
12M price return
-8.6%
Share of matched S&P 500 members
Monthly observations through Jan 2026
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 |
|---|---|---|---|---|---|
| Jan 2026 | $138.7bn | 0.265% | -0.070 pp | -8.6% | No |
| Dec 2025 | $141.4bn | 0.277% | -0.022 pp | +6.8% | No |
| Nov 2025 | $150.6bn | 0.296% | +0.001 pp | +12.0% | No |
| Oct 2025 | $149.2bn | 0.292% | +0.002 pp | +19.9% | No |
| Sep 2025 | $144.7bn | 0.290% | +0.002 pp | +16.5% | No |
| Aug 2025 | $156.3bn | 0.324% | +0.033 pp | +29.0% | No |
| Jul 2025 | $155.2bn | 0.327% | +0.133 pp | +42.0% | No |
| Jun 2025 | $158.9bn | 0.343% | +0.130 pp | +39.5% | No |
| May 2025 | $155.7bn | 0.353% | +0.140 pp | +39.3% | Yes |
| Apr 2025 | $151.8bn | 0.365% | +0.059 pp | +43.1% | Yes |
| Mar 2025 | $148.9bn | 0.353% | +0.075 pp | +47.3% | Yes |
| Feb 2025 | $153.2bn | 0.343% | +0.064 pp | +56.8% | Yes |
| Jan 2025 | $150.9bn | 0.335% | +0.060 pp | +61.8% | Yes |
| Dec 2024 | $131.6bn | 0.299% | +0.046 pp | +54.5% | Yes |
| Nov 2024 | $133.6bn | 0.295% | +0.040 pp | +62.2% | Yes |
| Oct 2024 | $123.7bn | 0.291% | +0.036 pp | +64.1% | Yes |
| Sep 2024 | $123.4bn | 0.287% | +0.029 pp | +58.7% | Yes |
| Aug 2024 | $120.4bn | 0.291% | +0.039 pp | +51.6% | Yes |
| Jul 2024 | $108.6bn | 0.195% | +0.032 pp | +42.5% | No |
| Jun 2024 | $113.2bn | 0.212% | +0.032 pp | +42.4% | No |
| May 2024 | $111.1bn | 0.212% | +0.030 pp | +46.8% | No |
| Apr 2024 | $105.4bn | 0.305% | +0.053 pp | +37.9% | Yes |
| Mar 2024 | $100.5bn | 0.279% | +0.034 pp | +36.9% | Yes |
| Feb 2024 | $97.1bn | 0.278% | +0.043 pp | +41.7% | 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.