Observatory · observe first
S&P Global
SPGI · United States · Financial Exchanges & Data · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.332%
12M weight contribution
-0.062 pp
3M weight contribution
-0.025 pp
12M price return
+13.9%
Share of matched S&P 500 members
Monthly observations through Dec 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 |
|---|---|---|---|---|---|
| Dec 2024 | $146.2bn | 0.332% | -0.062 pp | +13.9% | Yes |
| Nov 2024 | $153.4bn | 0.338% | -0.050 pp | +26.6% | Yes |
| Oct 2024 | $141.0bn | 0.331% | -0.026 pp | +38.6% | Yes |
| Sep 2024 | $153.0bn | 0.356% | -0.011 pp | +42.5% | Yes |
| Aug 2024 | $152.0bn | 0.367% | -0.008 pp | +32.4% | Yes |
| Jul 2024 | $143.5bn | 0.257% | -0.002 pp | +23.9% | No |
| Jun 2024 | $132.0bn | 0.247% | -0.034 pp | +12.2% | No |
| May 2024 | $126.6bn | 0.242% | -0.034 pp | +17.4% | No |
| Apr 2024 | $123.1bn | 0.357% | -0.015 pp | +15.7% | No |
| Mar 2024 | $126.4bn | 0.351% | -0.008 pp | +24.5% | No |
| Feb 2024 | $127.3bn | 0.365% | -0.001 pp | +26.7% | No |
| Jan 2024 | $134.4bn | 0.400% | +0.004 pp | +20.7% | Yes |
| Dec 2023 | $132.0bn | 0.394% | +0.021 pp | +32.8% | Yes |
| Nov 2023 | $124.6bn | 0.389% | +0.020 pp | +19.0% | Yes |
| Oct 2023 | $105.2bn | 0.357% | +0.006 pp | +9.8% | Yes |
| Sep 2023 | $110.0bn | 0.367% | -0.011 pp | +20.9% | Yes |
| Aug 2023 | $117.7bn | 0.375% | -0.023 pp | +12.1% | Yes |
| Jul 2023 | $118.8bn | 0.259% | -0.158 pp | +5.7% | No |
| Jun 2023 | $121.7bn | 0.281% | -0.140 pp | +20.1% | No |
| May 2023 | $111.5bn | 0.275% | -0.129 pp | +6.2% | No |
| Apr 2023 | $110.0bn | 0.372% | +0.061 pp | -2.8% | No |
| Mar 2023 | $105.0bn | 0.358% | +0.043 pp | -15.1% | No |
| Feb 2023 | $103.9bn | 0.365% | +0.068 pp | -8.3% | No |
| Jan 2023 | $115.6bn | 0.395% | +0.077 pp | -8.9% | 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.