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
0.103%
12M weight contribution
-99.793 pp
3M weight contribution
+0.056 pp
12M price return
+58.1%
Share of matched S&P 500 members
Monthly observations through May 2021
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 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 |
| May 2020 | $17877500.0bn | 99.896% | +99.805 pp | +14.1% | Yes |
| Apr 2020 | $14.8bn | 0.083% | -0.004 pp | -4.4% | Yes |
| Mar 2020 | $15.3bn | 0.000% | -0.083 pp | +6.3% | No |
| Feb 2020 | $18.4bn | 0.000% | -0.086 pp | +23.2% | No |
| Jan 2020 | $19.1bn | 0.094% | +0.049 pp | +40.0% | Yes |
| Dec 2019 | $17.8bn | 0.087% | +0.039 pp | +31.8% | No |
| Nov 2019 | $17.4bn | 0.088% | +0.041 pp | +23.5% | No |
| Oct 2019 | $17.0bn | 0.089% | +0.043 pp | +25.8% | No |
| Sep 2019 | $16.7bn | 0.089% | +0.045 pp | +22.8% | No |
| Aug 2019 | $16.9bn | 0.092% | +0.049 pp | +28.4% | Yes |
| Jul 2019 | $16.8bn | 0.090% | +0.014 pp | +29.5% | Yes |
| Jun 2019 | $16.2bn | 0.087% | +0.015 pp | +37.1% | 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.