What is the current annual book value of IRM?

As of today, IRM annual book value is -$981.01M

What is 1-year change in IRM annual book value?

IRM annual book value is down -94.98% year-over-year

What is 3-year change in IRM annual book value?

IRM annual book value is down -254.08% over the past 3 years

How far is IRM annual book value from its all-time high?

IRM annual book value is currently -142.70% below its historical high of $2.30B set on December 31, 2017

How does IRM annual book value rank versus sector peers?

IRM annual book value is higher than 1.15% of companies in Real Estate sector

When is IRM next annual earnings release?

The next annual earnings release for IRM is on February 11, 2027

What is the current quarterly book value of IRM?

As of today, IRM quarterly book value is -$1.39B

What is IRM quarterly book value most recent change?

IRM quarterly book value was down -8.38% on September 30, 2026

What is 1-year change in IRM quarterly book value?

IRM quarterly book value is down -57.40% year-over-year

How far is IRM quarterly book value from its all-time high?

IRM quarterly book value is currently -160.42% below its historical high of $2.30B set on December 31, 2017

How does IRM quarterly book value rank versus sector peers?

IRM quarterly book value is higher than 1.15% of companies in Real Estate sector

When is IRM next earnings release?

The next earnings release for IRM is on February 11, 2027

IRM Book Value History & Chart Since 1996

Annual Book Value

-$981.01M$477.89M-94.98%

December 31, 2025

Summary

Current Value: As of today, IRM annual book value is -$981.01M, down -94.98% on December 31, 2025
Historical Performance: IRM annual book value is down -254.08% over the past 3 years, down -186.30% over the past 5 years
All-Time High Comparison: IRM annual book value is currently -142.70% below its historical high of $2.30B set on December 31, 2017
3-Year Low Comparison: IRM annual book value is at its 3-year low
Sector Comparison: IRM annual book value is higher than 1.15% of companies in Real Estate sector

Book Value Chart

beforeafter

Performance

IRM Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Book Value	Dec 31, 25	-$981.01M	-95.0%	-254.1%	-186.3%	-150.4%
Quarterly Book Value	Sep 30, 26	-$1.39B	-57.4%	-628.8%	-242.5%	-181.4%
Price	Nov 12, 26	$114.58	+25.4%	+93.9%	+141.0%	+310.2%
	Dec 31, 25	$21.13B	+12.9%	+30.9%	+49.3%	+229.2%
	Dec 31, 25	$21.77B	+24.0%	+41.3%	+68.1%	+387.7%
	Nov 12, 26	-24.58	+19.7%	-137.4%	-273.8%	-905.9%
	Dec 31, 25	-$981.01M	-95.0%	-254.1%	-186.3%	-150.4%
Market Cap	Nov 12, 26	$34B	+26.4%	+97.8%	+147.9%	+554.7%

Book Value Highs

IRM Annual Book Value Highs Comparison
Period	High	Date	Current
3Y	$636.67M	N/A	-254.1%
5Y	$1.14B	N/A	-186.3%
All	$2.30B	Dec 31, 17	-142.7%

Book Value Lows

IRM Annual Book Value Lows Comparison
Period	Low	Date	Current
3Y	-$981.01M	Dec 31, 25	at low
5Y	-$981.01M	Dec 31, 25	at low
All	-$981.01M	Dec 31, 25	at low

Book Value History

Year	Value	Change
2025	-$981.01M	-95.0%
2024	-$503.12M	-337.7%
2023	$211.65M	-66.8%
2022	$636.67M	-25.6%
2021	$855.95M	-24.7%
2020	$1.14B	-22.4%
2019	$1.46B	-21.3%
2018	$1.86B	-19.0%
2017	$2.30B	+18.6%
2016	$1.94B	+280.6%
2015	$508.84M	-40.6%
2014	$856.35M	-17.8%
2013	$1.04B	-9.5%
2012	$1.15B	-7.7%
2011	$1.25B	-36.0%

Year	Value	Change
2010	$1.95B	-9.1%
2009	$2.14B	+18.8%
2008	$1.80B	+0.4%
2007	$1.80B	+15.6%
2006	$1.55B	+13.4%
2005	$1.37B	+12.4%
2004	$1.22B	+14.3%
2003	$1.07B	+12.8%
2002	$944.86M	+6.6%
2001	$885.96M	-4.2%
2000	$924.46M	+1,224.3%
1999	$69.81M	+10.6%
1998	$63.10M	+6.4%
1997	$59.32M	+333.2%
1996	-$25.44M	-

FAQ

What is the current annual book value of IRM?: As of today, IRM annual book value is -$981.01M
What is 1-year change in IRM annual book value?: IRM annual book value is down -94.98% year-over-year
What is 3-year change in IRM annual book value?: IRM annual book value is down -254.08% over the past 3 years
How far is IRM annual book value from its all-time high?: IRM annual book value is currently -142.70% below its historical high of $2.30B set on December 31, 2017
How does IRM annual book value rank versus sector peers?: IRM annual book value is higher than 1.15% of companies in Real Estate sector
When is IRM next annual earnings release?: The next annual earnings release for IRM is on February 11, 2027

Book Value Formula

Book Value = −

Quarterly Book Value

-$1.39B$107.29M-8.38%

September 30, 2026

Summary

Current Value: As of today, IRM quarterly book value is -$1.39B, down -8.38% on September 30, 2026
Historical Performance: IRM quarterly book value is down -57.40% year-over-year, down -628.83% over the past 3 years
All-Time High Comparison: IRM quarterly book value is currently -160.42% below its historical high of $2.30B set on December 31, 2017
3-Year Low Comparison: IRM quarterly book value is at its 3-year low
Sector Comparison: IRM quarterly book value is higher than 1.15% of companies in Real Estate sector

Performance

IRM Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Book Value	Sep 30, 26	-$1.39B	-8.4%	-57.4%	-628.8%	-242.5%
Annual Book Value	Dec 31, 25	-$981.01M	–	-95.0%	-254.1%	-186.3%
Price	Nov 12, 26	$114.58	-9.5%	+25.4%	+93.9%	+141.0%
	Sep 30, 26	$22.32B	+1.7%	+8.2%	+32.3%	+56.8%
	Sep 30, 26	$23.32B	+2.1%	+9.8%	+41.8%	+76.7%
	Nov 12, 26	-24.58	+16.5%	+19.7%	-137.4%	-273.8%
	Sep 30, 26	-$1.39B	-8.4%	-57.4%	-628.8%	-242.5%
Market Cap	Nov 12, 26	$34B	-9.5%	+26.4%	+97.8%	+147.9%

Quarterly Book Value Highs

IRM Quarterly Book Value Highs Comparison
Period	High	Date	Current
1Y	-$881.96M	N/A	-57.4%
3Y	$262.51M	N/A	-628.8%
5Y	$973.88M	N/A	-242.5%
All	$2.30B	Dec 31, 17	-160.4%

Quarterly Book Value Lows

IRM Quarterly Book Value Lows Comparison
Period	Low	Date	Current
1Y	-$1.39B	Sep 30, 26	at low
3Y	-$1.39B	Sep 30, 26	at low
5Y	-$1.39B	Sep 30, 26	at low
All	-$1.39B	Sep 30, 26	at low

Quarterly Book Value History

Month	Value	Change
Sep 2026	-$1.39B	-8.4%
Jun 2026	-$1.28B	-5.4%
Mar 2026	-$1.22B	-23.9%
Dec 2025	-$981.01M	-11.2%
Sep 2025	-$881.96M	-14.9%
Jun 2025	-$767.44M	-9.9%
Mar 2025	-$698.52M	-38.8%
Dec 2024	-$503.12M	-94.2%
Sep 2024	-$259.01M	-94.9%
Jun 2024	-$132.87M	-816.9%
Mar 2024	$18.53M	-91.2%
Dec 2023	$211.65M	-19.4%
Sep 2023	$262.51M	-36.9%
Jun 2023	$416.22M	-23.7%
Mar 2023	$545.47M	-14.3%
Dec 2022	$636.67M	+20.3%
Sep 2022	$529.20M	-18.2%
Jun 2022	$646.95M	-14.6%
Mar 2022	$757.72M	-11.5%
Dec 2021	$855.95M	-12.1%
Sep 2021	$973.88M	-15.1%
Jun 2021	$1.15B	+19.6%
Mar 2021	$959.71M	-15.6%
Dec 2020	$1.14B	+21.3%
Sep 2020	$937.36M	-8.5%
Jun 2020	$1.02B	-8.8%
Mar 2020	$1.12B	-23.2%
Dec 2019	$1.46B	-3.1%
Sep 2019	$1.51B	-8.9%
Jun 2019	$1.66B	-5.8%
Mar 2019	$1.76B	-5.5%
Dec 2018	$1.86B	-3.9%
Sep 2018	$1.94B	-5.8%
Jun 2018	$2.06B	-9.0%
Mar 2018	$2.26B	-1.6%
Dec 2017	$2.30B	+23.1%
Sep 2017	$1.87B	+0.6%
Jun 2017	$1.86B	-2.5%
Mar 2017	$1.90B	-1.7%
Dec 2016	$1.94B	-8.9%
Sep 2016	$2.12B	-4.3%
Jun 2016	$2.22B	+347.4%
Mar 2016	$496.40M	-2.4%
Dec 2015	$508.84M	-16.2%
Sep 2015	$607.20M	-14.3%
Jun 2015	$708.79M	-4.6%
Mar 2015	$742.86M	-13.3%
Dec 2014	$856.35M	+87.9%
Sep 2014	$455.77M	-64.6%
Jun 2014	$1.29B	+23.5%
Mar 2014	$1.04B	-0.4%
Dec 2013	$1.05B	-1.1%
Sep 2013	$1.06B	-2.0%
Jun 2013	$1.08B	-3.1%
Mar 2013	$1.11B	-3.1%
Dec 2012	$1.15B	-10.7%
Sep 2012	$1.29B	+3.8%
Jun 2012	$1.24B	-1.6%
Mar 2012	$1.26B	+1.1%

Month	Value	Change
Dec 2011	$1.25B	-27.0%
Sep 2011	$1.71B	-16.9%
Jun 2011	$2.05B	+1.7%
Mar 2011	$2.02B	+3.8%
Dec 2010	$1.95B	-0.8%
Sep 2010	$1.96B	-7.2%
Jun 2010	$2.11B	-1.7%
Mar 2010	$2.15B	+0.3%
Dec 2009	$2.14B	+4.6%
Sep 2009	$2.05B	+5.1%
Jun 2009	$1.95B	+7.4%
Mar 2009	$1.81B	+0.7%
Dec 2008	$1.80B	-5.0%
Sep 2008	$1.90B	-0.2%
Jun 2008	$1.90B	+3.6%
Mar 2008	$1.83B	+2.2%
Dec 2007	$1.80B	+4.5%
Sep 2007	$1.72B	+4.0%
Jun 2007	$1.65B	+4.1%
Mar 2007	$1.59B	+2.2%
Dec 2006	$1.55B	+3.3%
Sep 2006	$1.50B	+2.7%
Jun 2006	$1.46B	+4.4%
Mar 2006	$1.40B	+2.3%
Dec 2005	$1.37B	+3.2%
Sep 2005	$1.33B	+2.8%
Jun 2005	$1.29B	+2.8%
Mar 2005	$1.26B	+3.0%
Dec 2004	$1.22B	+4.6%
Sep 2004	$1.17B	+3.0%
Jun 2004	$1.13B	+2.8%
Mar 2004	$1.10B	+3.2%
Dec 2003	$1.07B	+4.3%
Sep 2003	$1.02B	+2.1%
Jun 2003	$1.00B	+2.6%
Mar 2003	$976.41M	+3.3%
Dec 2002	$944.86M	+1.3%
Sep 2002	$932.45M	+1.9%
Jun 2002	$915.19M	+2.1%
Mar 2002	$896.63M	+1.2%
Dec 2001	$885.96M	-0.4%
Sep 2001	$889.53M	-3.6%
Jun 2001	$922.48M	-0.4%
Mar 2001	$925.93M	+0.2%
Dec 2000	$924.46M	-0.1%
Sep 2000	$925.07M	-1.9%
Jun 2000	$942.93M	-1.2%
Mar 2000	$954.16M	+1,266.8%
Dec 1999	$69.81M	-1.0%
Sep 1999	$70.48M	+3.2%
Jun 1999	$68.29M	+4.6%
Mar 1999	$65.29M	+3.5%
Dec 1998	$63.10M	-1.3%
Sep 1998	$63.91M	-6.7%
Jun 1998	$68.53M	+16.8%
Mar 1998	$58.68M	-1.0%
Dec 1997	$59.30M	+4.6%
Sep 1997	$56.70M	+322.4%
Jun 1997	-$25.50M	-

FAQ

What is the current quarterly book value of IRM?: As of today, IRM quarterly book value is -$1.39B
What is IRM quarterly book value most recent change?: IRM quarterly book value was down -8.38% on September 30, 2026
What is 1-year change in IRM quarterly book value?: IRM quarterly book value is down -57.40% year-over-year
How far is IRM quarterly book value from its all-time high?: IRM quarterly book value is currently -160.42% below its historical high of $2.30B set on December 31, 2017
How does IRM quarterly book value rank versus sector peers?: IRM quarterly book value is higher than 1.15% of companies in Real Estate sector
When is IRM next earnings release?: The next earnings release for IRM is on February 11, 2027

Book Value Formula

Book Value = −

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