Observatory · observe first
Arthur J. Gallagher & Co.
AJG · United States · Insurance Brokers · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.123%
12M weight contribution
+0.020 pp
3M weight contribution
+0.008 pp
12M price return
+11.9%
Share of matched S&P 500 members
Monthly observations through May 2022
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 |
|---|---|---|---|---|---|
| May 2022 | $34.0bn | 0.123% | +0.020 pp | +11.9% | Yes |
| Apr 2022 | $35.1bn | 0.127% | +0.024 pp | +17.7% | Yes |
| Mar 2022 | $36.4bn | 0.123% | +0.075 pp | +41.7% | Yes |
| Feb 2022 | $33.0bn | 0.114% | +0.068 pp | +33.8% | Yes |
| Jan 2022 | $32.7bn | 0.110% | +0.057 pp | +38.7% | Yes |
| Dec 2021 | $35.2bn | 0.113% | +0.016 pp | +39.0% | Yes |
| Nov 2021 | $33.8bn | 0.114% | +0.020 pp | +43.2% | Yes |
| Oct 2021 | $34.8bn | 0.116% | +0.022 pp | +64.0% | Yes |
| Sep 2021 | $30.7bn | 0.108% | -99.792 pp | +42.8% | Yes |
| Aug 2021 | $29.7bn | 0.099% | -99.797 pp | +38.5% | Yes |
| Jul 2021 | $28.8bn | 0.099% | -99.806 pp | +31.6% | Yes |
| Jun 2021 | $27.4bn | 0.097% | -99.801 pp | +45.9% | Yes |
| May 2021 | $28.7bn | 0.103% | -99.793 pp | +58.1% | Yes |
| Apr 2021 | $28.4bn | 0.103% | +0.020 pp | +87.7% | Yes |
| Mar 2021 | $24.2bn | 0.047% | +0.047 pp | +55.6% | No |
| Feb 2021 | $23.2bn | 0.046% | +0.046 pp | +25.0% | No |
| Jan 2021 | $22.2bn | 0.053% | -0.041 pp | +14.4% | No |
| Dec 2020 | $23.8bn | 0.096% | +0.009 pp | +32.1% | No |
| Nov 2020 | $22.2bn | 0.094% | +0.007 pp | +25.9% | No |
| Oct 2020 | $19.9bn | 0.094% | +0.006 pp | +15.7% | No |
| Sep 2020 | $20215300.0bn | 99.900% | +99.811 pp | +20.0% | Yes |
| Aug 2020 | $20161700.0bn | 99.897% | +99.805 pp | +18.2% | Yes |
| Jul 2020 | $20581000.0bn | 99.904% | +99.815 pp | +21.1% | Yes |
| Jun 2020 | $18486200.0bn | 99.898% | +99.810 pp | +13.4% | 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.