Observatory · observe first
American Tower
AMT · United States · Telecom Tower REITs · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.175%
12M weight contribution
-0.038 pp
3M weight contribution
-0.091 pp
12M price return
+9.9%
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 | $91.4bn | 0.175% | -0.038 pp | +9.9% | No |
| Apr 2024 | $80.1bn | 0.232% | -0.090 pp | -13.1% | No |
| Mar 2024 | $92.1bn | 0.256% | -0.069 pp | -0.0% | No |
| Feb 2024 | $92.7bn | 0.266% | -0.058 pp | +3.9% | No |
| Jan 2024 | $91.2bn | 0.271% | -0.085 pp | -9.4% | No |
| Dec 2023 | $100.6bn | 0.300% | -0.056 pp | +5.4% | Yes |
| Nov 2023 | $97.3bn | 0.303% | -0.046 pp | -2.5% | Yes |
| Oct 2023 | $83.1bn | 0.282% | -0.060 pp | -11.1% | Yes |
| Sep 2023 | $76.7bn | 0.256% | -0.137 pp | -21.1% | Yes |
| Aug 2023 | $84.5bn | 0.269% | -0.154 pp | -26.4% | Yes |
| Jul 2023 | $88.7bn | 0.193% | -0.240 pp | -27.6% | No |
| Jun 2023 | $90.4bn | 0.209% | -0.244 pp | -21.8% | No |
| May 2023 | $86.0bn | 0.212% | -0.209 pp | -25.9% | No |
| Apr 2023 | $95.3bn | 0.322% | -0.076 pp | -12.8% | No |
| Mar 2023 | $95.2bn | 0.325% | -0.061 pp | -16.5% | No |
| Feb 2023 | $92.2bn | 0.324% | -0.035 pp | -10.4% | No |
| Jan 2023 | $104.0bn | 0.356% | -0.029 pp | -8.8% | No |
| Dec 2022 | $98.6bn | 0.356% | -0.071 pp | -25.7% | No |
| Nov 2022 | $103.0bn | 0.350% | -0.054 pp | -13.7% | No |
| Oct 2022 | $96.5bn | 0.342% | -0.087 pp | -24.8% | No |
| Sep 2022 | $100.0bn | 0.393% | -0.031 pp | -17.8% | No |
| Aug 2022 | $118.3bn | 0.423% | -0.021 pp | -11.2% | Yes |
| Jul 2022 | $126.1bn | 0.433% | -0.008 pp | -2.2% | Yes |
| Jun 2022 | $116.6bn | 0.454% | +0.029 pp | -3.4% | 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.