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
0.164%
12M weight contribution
+0.023 pp
3M weight contribution
+0.055 pp
12M price return
+34.5%
Share of matched S&P 500 members
Monthly observations through Sep 2023
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 |
|---|---|---|---|---|---|
| Sep 2023 | $49.1bn | 0.164% | +0.023 pp | +34.5% | Yes |
| Aug 2023 | $49.7bn | 0.158% | +0.022 pp | +28.7% | Yes |
| Jul 2023 | $46.0bn | 0.100% | -0.029 pp | +21.3% | No |
| Jun 2023 | $47.0bn | 0.109% | -0.024 pp | +36.2% | No |
| May 2023 | $42.9bn | 0.106% | -0.016 pp | +25.1% | No |
| Apr 2023 | $44.1bn | 0.149% | +0.022 pp | +24.9% | Yes |
| Mar 2023 | $40.6bn | 0.138% | +0.016 pp | +10.8% | No |
| Feb 2023 | $39.7bn | 0.140% | +0.025 pp | +19.8% | No |
| Jan 2023 | $41.3bn | 0.141% | +0.031 pp | +25.4% | Yes |
| Dec 2022 | $39.8bn | 0.143% | +0.031 pp | +12.4% | Yes |
| Nov 2022 | $42.0bn | 0.142% | +0.028 pp | +23.7% | Yes |
| Oct 2022 | $39.3bn | 0.140% | +0.024 pp | +12.9% | Yes |
| Sep 2022 | $36.0bn | 0.142% | +0.034 pp | +16.6% | Yes |
| Aug 2022 | $38.2bn | 0.137% | +0.037 pp | +28.0% | Yes |
| Jul 2022 | $37.6bn | 0.129% | +0.030 pp | +30.1% | Yes |
| Jun 2022 | $34.2bn | 0.133% | +0.036 pp | +17.9% | Yes |
| 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 |
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.