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

0.055%

12M weight contribution

+0.009 pp

3M weight contribution

-0.002 pp

12M price return

+15.9%

Share of matched S&P 500 members

Monthly observations through Aug 2022

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 2022	$15.3bn	0.055%	+0.009 pp	+15.9%	Yes
Jul 2022	$14.1bn	0.048%	+0.005 pp	+16.6%	No
Jun 2022	$14.1bn	0.055%	+0.012 pp	+21.1%	Yes
May 2022	$15.7bn	0.056%	+0.011 pp	+30.3%	Yes
Apr 2022	$15.6bn	0.056%	+0.015 pp	+41.0%	Yes
Mar 2022	$16.1bn	0.054%	+0.033 pp	+57.6%	Yes
Feb 2022	$14.3bn	0.049%	+0.029 pp	+49.5%	Yes
Jan 2022	$13.3bn	0.045%	+0.021 pp	+44.3%	No
Dec 2021	$15.2bn	0.049%	+0.014 pp	+87.8%	Yes
Nov 2021	$13.2bn	0.044%	+0.011 pp	+76.2%	Yes
Oct 2021	$13.2bn	0.044%	+0.009 pp	+86.7%	No
Sep 2021	$12.6bn	0.044%	+0.044 pp	+72.9%	Yes
Aug 2021	$13.8bn	0.046%	+0.046 pp	+70.5%	Yes
Jul 2021	$12.6bn	0.043%	+0.043 pp	+66.8%	Yes
Jun 2021	$12.2bn	0.043%	+0.043 pp	+74.2%	Yes
May 2021	$12.6bn	0.045%	+0.045 pp	+83.3%	Yes
Apr 2021	$11.6bn	0.042%	+0.003 pp	+79.9%	Yes
Mar 2021	$10.7bn	0.021%	+0.021 pp	+68.6%	No
Feb 2021	$10.0bn	0.020%	+0.020 pp	+24.9%	No
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

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.