Observatory · observe first
Iron Mountain
IRM · United States · Other Specialized REITs · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.023%
12M weight contribution
-0.022 pp
3M weight contribution
-0.012 pp
12M price return
+16.3%
Share of matched S&P 500 members
Monthly observations through Jan 2021
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 |
|---|---|---|---|---|---|
| Jan 2021 | $9.7bn | 0.023% | -0.022 pp | +16.3% | Yes |
| Dec 2020 | $8.5bn | 0.034% | -0.011 pp | +1.0% | Yes |
| Nov 2020 | $7.9bn | 0.034% | -0.013 pp | -6.7% | Yes |
| Oct 2020 | $7.5bn | 0.036% | -0.014 pp | -13.4% | Yes |
| Sep 2020 | $7.7bn | 0.000% | -0.049 pp | -9.8% | No |
| Aug 2020 | $8.7bn | 0.000% | -0.050 pp | +2.7% | No |
| Jul 2020 | $8.1bn | 0.000% | -0.045 pp | +4.2% | No |
| Jun 2020 | $7.5bn | 0.000% | -0.048 pp | -9.4% | No |
| May 2020 | $7.4bn | 0.000% | -0.051 pp | -9.0% | No |
| Apr 2020 | $6.9bn | 0.039% | -0.013 pp | -19.4% | Yes |
| Mar 2020 | $6.8bn | 0.000% | -0.058 pp | -27.3% | No |
| Feb 2020 | $8.7bn | 0.000% | -0.059 pp | -7.6% | No |
| Jan 2020 | $9.1bn | 0.045% | +0.010 pp | -8.5% | No |
| Dec 2019 | $9.2bn | 0.045% | +0.012 pp | +5.9% | No |
| Nov 2019 | $9.2bn | 0.046% | +0.014 pp | +1.7% | No |
| Oct 2019 | $9.4bn | 0.049% | +0.019 pp | +15.2% | Yes |
| Sep 2019 | $9.3bn | 0.049% | +0.018 pp | +0.9% | Yes |
| Aug 2019 | $9.1bn | 0.050% | +0.016 pp | -5.3% | No |
| Jul 2019 | $8.4bn | 0.045% | -0.014 pp | -10.1% | No |
| Jun 2019 | $9.0bn | 0.048% | -0.012 pp | -4.1% | No |
| May 2019 | $8.8bn | 0.051% | -0.007 pp | -1.4% | Yes |
| Apr 2019 | $9.3bn | 0.052% | -0.008 pp | +2.5% | Yes |
| Mar 2019 | $10.2bn | 0.058% | +0.001 pp | +15.6% | Yes |
| Feb 2019 | $10.1bn | 0.059% | +0.005 pp | +20.6% | 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.