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

0.049%

12M weight contribution

+0.019 pp

3M weight contribution

+0.004 pp

12M price return

+15.2%

Share of matched S&P 500 members

Monthly observations through Oct 2019

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 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
Jan 2019	$10.6bn	0.035%	-0.018 pp	+13.8%	Yes
Dec 2018	$9.3bn	0.033%	-0.020 pp	-0.9%	No
Nov 2018	$9.7bn	0.032%	-0.021 pp	+2.1%	No
Oct 2018	$8.8bn	0.030%	-0.024 pp	-8.0%	No
Sep 2018	$9.9bn	0.031%	-0.022 pp	+3.7%	No
Aug 2018	$10.3bn	0.033%	-0.020 pp	+6.7%	No
Jul 2018	$10.0bn	0.059%	+0.005 pp	+3.8%	Yes
Jun 2018	$10.0bn	0.061%	+0.007 pp	+3.5%	Yes
May 2018	$9.5bn	0.058%	+0.004 pp	-3.3%	Yes
Apr 2018	$9.7bn	0.060%	+0.006 pp	-1.4%	Yes
Mar 2018	$9.4bn	0.058%	+0.004 pp	-4.5%	Yes
Feb 2018	$9.0bn	0.054%	+0.000 pp	-10.2%	Yes
Jan 2018	$9.4bn	0.053%	+0.000 pp	+0.0%	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.