Iron Mountain Incorporated (IRM) Shares Outstanding

Shares Outstanding

297.52M45.86K+0.02%

May 7, 2026

Summary

Current Value: As of today, IRM has 297.52M outstanding shares, up +0.02% on May 7, 2026
Historical Performance: IRM shares outstanding is up +0.84% year-over-year, up +2.02% over the past 3 years
All-Time High Comparison: IRM shares outstanding is currently at its all-time high
3-Year Low Comparison: IRM shares outstanding is +2.02% above its 3-year low of 291.62M reached on an earlier date

Chart

Performance

IRM Performance
Metric	Date	Value	1Y	3Y	5Y
Shares Outstanding	May 7, 26	297.52M	+0.8%	+2.0%	+3.0%
Price	May 11, 26	$129.96	+33.9%	+135.3%	+209.9%
Market Cap	May 11, 26	$39B	+35.0%	+140.1%	+219.4%
PE Ratio	May 11, 26	142.69	-39.7%	+411.4%	+281.7%
TTM Revenue	Mar 31, 26	$7.25B	+15.6%	+40.1%	+74.1%
TTM EPS	Mar 31, 26	$0.91	+121.9%	-54.0%	-18.8%
	May 11, 26	$58.13B	+26.5%	+95.6%	+150.6%
TTM Net Income	Mar 31, 26	$285.02M	+132.0%	-51.4%	+10.4%
TTM Dividend	May 11, 26	$3.30	+15.1%	+33.3%	+33.3%

Highs

IRM Shares Outstanding Highs Comparison
Period	High	Date	Current
1Y	297.52M	May 7, 26	at high
3Y	297.52M	May 7, 26	at high
5Y	297.52M	May 7, 26	at high
All	297.52M	May 7, 26	at high

Lows

IRM Shares Outstanding Lows Comparison
Period	Low	Date	Current
1Y	295.04M	N/A	+0.8%
3Y	291.62M	N/A	+2.0%
5Y	288.73M	N/A	+3.0%
All	57.76M	Mar 30, 97	+415.1%

History

Month	Value	Change
May 2026	297.52M	+0.6%
Dec 2025	295.79M	+0.7%
Dec 2024	293.59M	+0.5%
Dec 2023	292.14M	+0.5%
Dec 2022	290.83M	+0.4%
Dec 2021	289.76M	+0.5%
Dec 2020	288.27M	+0.3%
Dec 2019	287.30M	+0.3%
Dec 2018	286.32M	+1.1%
Dec 2017	283.11M	+7.4%
Dec 2016	263.68M	+24.8%
Dec 2015	211.34M	+0.7%
Dec 2014	209.82M	+9.6%
Dec 2013	191.43M	+0.7%
Dec 2012	190.01M	+10.4%

Month	Value	Change
Dec 2011	172.14M	-14.0%
Dec 2010	200.06M	-1.7%
Dec 2009	203.55M	+0.9%
Sep 2008	201.67M	+1.3%
Dec 2007	199.11M	-0.0%
Dec 2006	199.21M	+0.9%
Dec 2005	197.49M	+1.4%
Dec 2004	194.73M	+1.1%
Dec 2003	192.54M	+0.6%
Dec 2002	191.36M	+0.8%
Dec 2001	189.76M	+1.4%
Dec 2000	187.11M	+55.5%
Dec 1999	120.30M	+90.3%
Dec 1998	63.22M	+3.5%
Dec 1997	61.07M	-

FAQ

What is the current shares outstanding of IRM?
As of today, IRM shares outstanding is 297.52M
What is 1-year change in IRM shares outstanding?
IRM shares outstanding is up +0.84% year-over-year
What is 3-year change in IRM shares outstanding?
IRM shares outstanding is up +2.02% over the past 3 years
How far is IRM shares outstanding from its all-time high?
IRM shares outstanding is currently at its all-time high

Data Sources & References

IRM Official Website www.ironmountain.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/1020569/000102056926000013/0001020569-26-000013-index.htm
IRM Profile on Yahoo Finance finance.yahoo.com/quote/IRM
IRM Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/irm