Observatory · observe first
Marsh McLennan
MRSH · United States · Insurance Brokers · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.267%
12M weight contribution
-0.018 pp
3M weight contribution
+0.030 pp
12M price return
+14.7%
Share of matched S&P 500 members
Monthly observations through Apr 2025
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 |
|---|---|---|---|---|---|
| Apr 2025 | $111.1bn | 0.267% | -0.018 pp | +14.7% | Yes |
| Mar 2025 | $119.9bn | 0.285% | +0.004 pp | +20.2% | Yes |
| Feb 2025 | $116.8bn | 0.261% | -0.024 pp | +19.3% | Yes |
| Jan 2025 | $106.5bn | 0.237% | -0.047 pp | +13.5% | No |
| Dec 2024 | $104.3bn | 0.237% | -0.042 pp | +13.7% | No |
| Nov 2024 | $114.5bn | 0.253% | -0.054 pp | +18.7% | Yes |
| Oct 2024 | $107.2bn | 0.252% | -0.066 pp | +16.8% | Yes |
| Sep 2024 | $109.7bn | 0.255% | -0.059 pp | +18.9% | Yes |
| Aug 2024 | $111.9bn | 0.270% | -0.037 pp | +18.4% | Yes |
| Jul 2024 | $109.5bn | 0.196% | -0.007 pp | +19.9% | No |
| Jun 2024 | $103.8bn | 0.195% | -0.021 pp | +13.7% | No |
| May 2024 | $102.3bn | 0.196% | -0.016 pp | +21.6% | No |
| Apr 2024 | $98.3bn | 0.285% | -0.016 pp | +12.3% | No |
| Mar 2024 | $101.3bn | 0.281% | -0.000 pp | +25.5% | No |
| Feb 2024 | $99.4bn | 0.285% | +0.003 pp | +26.6% | No |
| Jan 2024 | $95.6bn | 0.284% | -0.013 pp | +12.4% | No |
| Dec 2023 | $93.4bn | 0.279% | -0.018 pp | +16.1% | No |
| Nov 2023 | $98.3bn | 0.307% | +0.015 pp | +16.8% | Yes |
| Oct 2023 | $93.5bn | 0.318% | +0.034 pp | +19.1% | Yes |
| Sep 2023 | $94.0bn | 0.314% | +0.021 pp | +29.3% | Yes |
| Aug 2023 | $96.3bn | 0.307% | +0.019 pp | +22.6% | Yes |
| Jul 2023 | $93.1bn | 0.203% | -0.078 pp | +16.6% | No |
| Jun 2023 | $93.0bn | 0.215% | -0.088 pp | +22.9% | No |
| May 2023 | $85.7bn | 0.212% | -0.077 pp | +9.8% | 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.