Observatory · observe first
American International Group
AIG · United States · Multi-line Insurance · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.086%
12M weight contribution
-0.029 pp
3M weight contribution
-0.009 pp
12M price return
+6.3%
Share of matched S&P 500 members
Monthly observations through Oct 2025
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 |
|---|---|---|---|---|---|
| Oct 2025 | $43.7bn | 0.086% | -0.029 pp | +6.3% | No |
| Sep 2025 | $43.5bn | 0.087% | -0.023 pp | +9.6% | No |
| Aug 2025 | $45.1bn | 0.093% | -0.026 pp | +7.8% | No |
| Jul 2025 | $44.7bn | 0.094% | +0.000 pp | +0.1% | No |
| Jun 2025 | $49.3bn | 0.106% | +0.014 pp | +17.7% | No |
| May 2025 | $48.8bn | 0.111% | +0.011 pp | +9.7% | No |
| Apr 2025 | $48.4bn | 0.116% | -0.032 pp | +10.6% | Yes |
| Mar 2025 | $51.6bn | 0.122% | -0.025 pp | +13.6% | Yes |
| Feb 2025 | $49.2bn | 0.110% | -0.032 pp | +16.2% | Yes |
| Jan 2025 | $45.9bn | 0.102% | -0.043 pp | +8.2% | No |
| Dec 2024 | $45.4bn | 0.103% | -0.039 pp | +9.8% | No |
| Nov 2024 | $48.0bn | 0.106% | -0.038 pp | +19.3% | No |
| Oct 2024 | $48.9bn | 0.115% | -0.034 pp | +26.4% | Yes |
| Sep 2024 | $47.2bn | 0.110% | -0.034 pp | +23.4% | No |
| Aug 2024 | $49.6bn | 0.120% | -0.013 pp | +34.5% | Yes |
| Jul 2024 | $52.6bn | 0.094% | -0.001 pp | +34.3% | No |
| Jun 2024 | $49.3bn | 0.092% | -0.004 pp | +31.8% | No |
| May 2024 | $52.3bn | 0.100% | +0.006 pp | +52.6% | No |
| Apr 2024 | $51.3bn | 0.149% | +0.016 pp | +45.2% | Yes |
| Mar 2024 | $53.2bn | 0.148% | +0.021 pp | +58.8% | Yes |
| Feb 2024 | $49.6bn | 0.142% | -0.016 pp | +22.2% | No |
| Jan 2024 | $48.8bn | 0.145% | -0.016 pp | +12.7% | Yes |
| Dec 2023 | $47.6bn | 0.142% | -0.028 pp | +9.8% | Yes |
| Nov 2023 | $46.2bn | 0.144% | -0.015 pp | +6.8% | 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.