Observatory · observe first
Alliant Energy
LNT · United States · Electric Utilities · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.035%
12M weight contribution
-0.001 pp
3M weight contribution
-0.002 pp
12M price return
+15.4%
Share of matched S&P 500 members
Monthly observations through Aug 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 |
|---|---|---|---|---|---|
| Aug 2025 | $16.7bn | 0.035% | -0.001 pp | +15.4% | No |
| Jul 2025 | $16.7bn | 0.035% | +0.010 pp | +20.7% | No |
| Jun 2025 | $15.5bn | 0.033% | +0.009 pp | +22.9% | No |
| May 2025 | $16.0bn | 0.036% | +0.011 pp | +25.0% | No |
| Apr 2025 | $15.7bn | 0.038% | +0.001 pp | +26.8% | Yes |
| Mar 2025 | $16.5bn | 0.039% | +0.003 pp | +32.2% | Yes |
| Feb 2025 | $16.6bn | 0.037% | +0.002 pp | +40.0% | Yes |
| Jan 2025 | $15.1bn | 0.034% | -0.003 pp | +25.3% | No |
| Dec 2024 | $15.2bn | 0.034% | -0.005 pp | +19.5% | Yes |
| Nov 2024 | $16.2bn | 0.036% | -0.004 pp | +29.6% | Yes |
| Oct 2024 | $15.4bn | 0.036% | -0.006 pp | +27.5% | Yes |
| Sep 2024 | $15.6bn | 0.036% | -0.005 pp | +30.0% | Yes |
| Aug 2024 | $14.9bn | 0.036% | -0.004 pp | +20.6% | Yes |
| Jul 2024 | $14.3bn | 0.026% | -0.004 pp | +7.5% | No |
| Jun 2024 | $13.0bn | 0.024% | -0.006 pp | +0.7% | No |
| May 2024 | $13.2bn | 0.025% | -0.007 pp | +3.8% | No |
| Apr 2024 | $12.8bn | 0.037% | -0.010 pp | -6.3% | No |
| Mar 2024 | $12.9bn | 0.036% | -0.010 pp | -2.2% | No |
| Feb 2024 | $12.2bn | 0.035% | -0.010 pp | -3.5% | No |
| Jan 2024 | $12.4bn | 0.037% | -0.009 pp | -6.7% | No |
| Dec 2023 | $13.1bn | 0.039% | -0.011 pp | -3.8% | Yes |
| Nov 2023 | $12.9bn | 0.040% | -0.008 pp | -7.0% | Yes |
| Oct 2023 | $12.3bn | 0.042% | -0.005 pp | -3.2% | Yes |
| Sep 2023 | $12.2bn | 0.041% | -0.011 pp | -5.5% | 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.