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
0.106%
12M weight contribution
-0.000 pp
3M weight contribution
-0.046 pp
12M price return
+27.7%
Share of matched S&P 500 members
Monthly observations through May 2024
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 2024 | $55.4bn | 0.106% | -0.000 pp | +27.7% | No |
| Apr 2024 | $50.9bn | 0.147% | -0.002 pp | +13.9% | No |
| Mar 2024 | $54.2bn | 0.150% | +0.012 pp | +32.0% | No |
| Feb 2024 | $52.9bn | 0.152% | +0.012 pp | +31.9% | No |
| Jan 2024 | $50.1bn | 0.149% | +0.008 pp | +19.8% | No |
| Dec 2023 | $48.6bn | 0.145% | +0.001 pp | +20.5% | No |
| Nov 2023 | $53.8bn | 0.168% | +0.025 pp | +26.7% | Yes |
| Oct 2023 | $50.8bn | 0.173% | +0.033 pp | +27.2% | Yes |
| 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 |
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.