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
99.896%
12M weight contribution
+99.805 pp
3M weight contribution
+99.895 pp
12M price return
+14.1%
Share of matched S&P 500 members
Monthly observations through May 2020
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 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 |
| May 2019 | $15.6bn | 0.091% | +0.018 pp | +29.1% | Yes |
| Apr 2019 | $15.5bn | 0.086% | +0.008 pp | +22.2% | Yes |
| Mar 2019 | $14.4bn | 0.083% | +0.006 pp | +16.2% | Yes |
| Feb 2019 | $14.8bn | 0.086% | +0.011 pp | +19.5% | Yes |
| Jan 2019 | $13.7bn | 0.045% | -0.025 pp | +11.9% | No |
| Dec 2018 | $13.5bn | 0.048% | -0.022 pp | +10.4% | No |
| Nov 2018 | $14.2bn | 0.047% | -0.023 pp | +14.8% | No |
| Oct 2018 | $13.6bn | 0.046% | -0.024 pp | +10.3% | No |
| Sep 2018 | $13.6bn | 0.043% | -0.027 pp | +10.9% | No |
| Aug 2018 | $13.2bn | 0.043% | -0.028 pp | +6.9% | No |
| Jul 2018 | $13.0bn | 0.076% | +0.006 pp | +5.7% | Yes |
| Jun 2018 | $11.9bn | 0.072% | +0.002 pp | -3.3% | 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.