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Iron Mountain

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FY2024 Annual Report · Iron Mountain
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2024 Annual Financial Report

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM 10-K 
(Mark One)
☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2024
or
☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                                  to
Commission File Number 1-13045 
_________________________________________________________
IRON MOUNTAIN INCORPORATED
(Exact name of Registrant as Specified in Its Charter)
Delaware 
(State or other jurisdiction of incorporation)
85 New Hampshire Avenue, Suite 150
Portsmouth, New Hampshire 
(Address of principal executive offices)
23-2588479 
(I.R.S. Employer Identification No.)
03801 
(Zip Code)
617-535-4766
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of Each Class
 
Trading Symbols(s)
Name of Exchange on Which Registered
Common Stock, $.01 par value per share  
IRM
New York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒    No ☐
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐    No ☒
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 
1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing 
requirements for the past 90 days. Yes ☒    No ☐
Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of 
Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒    No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an 
emerging growth company. See the definitions of "large accelerated filer", "accelerated filer", "smaller reporting company" and "emerging growth company" 
in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
☒
Accelerated filer
☐
Non-accelerated filer
☐
Smaller reporting company
☐
Emerging growth company
☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal 
control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared 
or issued its audit report. Yes ☒    No ☐
If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in 
the filing reflect the correction of an error to previously issued financial statements. ☐
Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation 
received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐    No ☒
As of June 30, 2024, the aggregate market value of the Common Stock of the registrant held by non-affiliates of the registrant was approximately 
$25.7 billion based on the closing price on the New York Stock Exchange on such date.
Number of shares of the registrant’s Common Stock at February 7, 2025: 293,740,905
DOCUMENTS INCORPORATED BY REFERENCE
Certain information required in Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K (the "Annual Report") is incorporated by 
reference from our definitive Proxy Statement for our 2025 Annual Meeting of Stockholders (our "Proxy Statement") to be filed with the Securities and 
Exchange Commission (the "SEC") within 120 days after the close of the fiscal year ended December 31, 2024.
Table of Contents

IRON MOUNTAIN INCORPORATED
2024 FORM 10-K ANNUAL REPORT
TABLE OF CONTENTS
PART I
01
ITEM 1.
BUSINESS
09
ITEM 1A. RISK FACTORS
20
ITEM 1B. UNRESOLVED STAFF COMMENTS
20
ITEM 1C. CYBERSECURITY
22
ITEM 2.
PROPERTIES
25
ITEM 3.
LEGAL PROCEEDINGS
25
ITEM 4.
MINE SAFETY DISCLOSURES
 
 
PART II
27
ITEM 5.
MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER 
MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
27
ITEM 6.
[RESERVED]
27
ITEM 7.
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS
56
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
57
ITEM 8.
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
57
ITEM 9.
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE
58
ITEM 9A. CONTROLS AND PROCEDURES
60
ITEM 9B. OTHER INFORMATION
60
ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT 
INSPECTIONS
 
 
 
 
PART III
62
ITEM 10.
DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
62
ITEM 11.
EXECUTIVE COMPENSATION
62
ITEM 12.
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT 
AND RELATED STOCKHOLDER MATTERS
62
ITEM 13.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE
62
ITEM 14.
PRINCIPAL ACCOUNTANT FEES AND SERVICES
 
 
 
PART IV
64
ITEM 15.
EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
135
ITEM 16.
FORM 10-K SUMMARY
Table of Contents
ii

References in this Annual Report on Form 10-K for the year ended December 31, 2024 (this "Annual Report") to "the Company", 
"Iron Mountain", "we", "us" or "our" include Iron Mountain Incorporated, a Delaware corporation, and its predecessor, as applicable, 
and its consolidated subsidiaries, unless the context indicates otherwise.
CAUTIONARY NOTE REGARDING FORWARD-
LOOKING STATEMENTS
We have made statements in this Annual Report that constitute "forward-looking statements" as that term is defined in the Private 
Securities Litigation Reform Act of 1995 and other securities laws. These forward-looking statements concern our current 
expectations regarding our future results from operations, economic performance, financial condition, goals, strategies, investment 
objectives, plans and achievements. These forward-looking statements are subject to various known and unknown risks, 
uncertainties and other factors, and you should not rely upon them except as statements of our present intentions and of our 
present expectations, which may or may not occur. When we use words such as "believes", "expects", "anticipates", "estimates", 
"plans", "intends", "pursue", "will" or similar expressions, we are making forward-looking statements. Although we believe that our 
forward-looking statements are based on reasonable assumptions, our expected results may not be achieved, and actual results 
may differ materially from our expectations. In addition, important factors that could cause actual results to differ from expectations 
include, among others:
•
our ability or inability to execute our strategic growth plan, including our ability to invest according to plan, grow our businesses 
(including through joint ventures or other co-investment vehicles), incorporate alternative technologies (including artificial 
intelligence ("AI")) into our offerings, achieve satisfactory returns on new product offerings, continue our revenue management, 
expand and manage our global operations, complete acquisitions on satisfactory terms, integrate acquired companies efficiently 
and transition to more sustainable sources of energy;
•
changes in customer preferences and demand for our storage and information management services, including as a result of the 
shift from paper and tape storage to alternative technologies that require less physical space or services activity;
•
the costs of complying with and our ability to comply with laws, regulations and customer requirements, including those relating 
to data privacy and cybersecurity issues, as well as fire and safety and environmental standards;
•
the impact of attacks on our internal information technology ("IT") systems, including the impact of such incidents on our 
reputation and ability to compete and any litigation or disputes that may arise in connection with such incidents;
•
our ability to fund capital expenditures;
•
the impact of our distribution requirements on our ability to execute our business plan;
•
our ability to remain qualified for taxation as a real estate investment trust for United States federal income tax purposes 
("REIT");
•
changes in the political and economic environments in the countries in which we operate and changes in the global political 
climate;
•
our ability to raise debt or equity capital and changes in the cost of our debt;
•
our ability to comply with our existing debt obligations and restrictions in our debt instruments;
•
the impact of service interruptions or equipment damage and the cost of power on our data center operations;
•
the cost or potential liabilities associated with real estate necessary for our business;
•
unexpected events, including those resulting from climate change or geopolitical events, could disrupt our operations and 
adversely affect our reputation and results of operations;
•
failures to implement and manage new IT systems;
•
other trends in competitive or economic conditions affecting our financial condition or results of operations not presently 
contemplated; and
•
the other risks described in our periodic reports filed with the SEC, including under the caption "Risk Factors" in Part I, Item 1A of 
this Annual Report.
Except as required by law, we undertake no obligation to update any forward-looking statements appearing in this report.
Table of Contents
iii

Table of Contents

PART I
ITEM 1. BUSINESS. 
BUSINESS OVERVIEW
Iron Mountain Incorporated, a Delaware corporation ("IMI"), was founded in an underground facility near Hudson, New York in 1951 
where it stored business records. Today, we are a global leader in information management services, and we are trusted by more 
than 240,000 customers in 61 countries, including approximately 95% of the Fortune 1000, to help unlock value and intelligence 
from their assets through services that transcend the physical and digital worlds. Our broad range of solutions address their 
information management, digital transformation, information security, data center and asset lifecycle management (“ALM”) needs. 
Our longstanding commitment to safety, security, sustainability and innovation in support of our customers underpins everything we 
do. We currently serve customers across an array of market verticals — commercial, legal, financial, healthcare, technology, 
insurance, life sciences, energy, business services, entertainment and government organizations. 
We are listed on the New York Stock Exchange (the "NYSE") and are a constituent of the Standard & Poor’s 500 Index, the Morgan 
Stanley Capital International ("MSCI") REIT index and the FTSE EPRA Nareit Global Real Estate Index. As of December 31, 2024, 
we were number 604 on the Fortune 1000. We have been organized and have operated as a REIT beginning with our taxable year 
ended December 31, 2014.
BUSINESS STRATEGY
OVERVIEW
Our company has been a market leader in the physical ecosystem supporting information storage and retrieval, as most 
businesses have relied on paper documents or computer tapes to store their valuable information. Over time, customers are 
increasing their digital information, with the new information storage ecosystem being a hybrid of physical and digital media. We 
have evolved our business to meet our customers' needs while remaining focused on driving growth supported by our four pillars 
outlined below.
Continued revenue growth in physical 
storage through revenue management 
actions as well as volume growth 
achieved in faster growing markets 
and our consumer business, as well as 
complementary business growth
•
We are establishing and enhancing leadership positions in higher-growth 
markets such as central and eastern Europe, Latin America, Asia, the Middle 
East and Africa.
•
We continue to identify, acquire, incubate and scale complementary businesses 
and products to support our long-term growth objectives and drive solid returns 
on invested capital. These opportunities include our Global Digital Solutions, 
ALM, Fine Arts and Consumer Storage (each as defined below) businesses.
Utilizing our global scale as well as 
over 70 years of customer trust to 
deliver differentiated data center 
offerings
•
We have made significant progress in scaling our Global Data Center Business 
through acquisitions and organic growth, with 29 operating data centers across 
21 global markets, either directly or through unconsolidated joint ventures. 
•
As of December 31, 2024, we had leased approximately 96% of the existing 416 
megawatt ("MW") capacity of our data centers. With a total potential capacity of 
1,280 MW in land and buildings currently owned or operated by us, we are 
among the largest global data center operators.
Establishing and maintaining a 
leadership position in critical digital 
infrastructure as well as developing 
and offering new products and 
services that allow our customers to 
achieve reliable and secure 
information management solutions in 
an increasingly hybrid physical and 
digital world
•
We are positioned to take advantage of the secular growth trends of the 
changing nature of digital infrastructure. We continue to scale our Global Digital 
Solutions business to complement our existing offerings in records and 
information management, ALM, and our Global Data Center business in order to 
respond to our customers’ growing interest and need to react to environmental, 
social and corporate governance considerations. This full suite of 
complementary businesses puts Iron Mountain in a unique position to cross sell 
our products and services to our customers.
•
Our customers are faced with navigating a more complex regulatory 
environment, and one in which hybrid physical and digital solutions have 
become the norm. Our strategy is underpinned by our persistent focus on best-
in-class customer experience, as we continue to seek innovative solutions to 
help our customers progress on their journey from physical storage to a digital 
ecosystem.
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IRON MOUNTAIN 2024 FORM 10-K
1

Continued investment in our growth 
agenda, our business and customer-
centric solutions
•
We have established an investment strategy to fuel our growth. The investments 
we outlined in our plan for Project Matterhorn (as defined below) have been 
informed by our established leadership position in the physical storage 
business, our expanding services such as Global Digital Solutions and ALM and 
our significant progress in the Global Data Center Business.
PROJECT MATTERHORN
In September 2022, we announced a global program designed to accelerate the growth of our business ("Project Matterhorn"). 
Project Matterhorn investments focus on transforming our operating model to a global operating model. Project Matterhorn focuses 
on the formation of a solution-based sales approach that is designed to allow us to optimize our shared services and best practices 
to better serve our customers' needs. We are investing to accelerate growth and to capture a greater share of the large, global 
addressable markets in which we operate. We have incurred approximately $378.5 million in Restructuring and other 
transformation costs from the inception of Project Matterhorn through December 31, 2024. We expect to incur approximately 
$150.0 million in costs related to Project Matterhorn during the year ending December 31, 2025, at which point the program is 
expected to be completed. Costs are comprised of (1) restructuring costs, which include (i) site consolidation and other related exit 
costs, (ii) employee severance costs and (iii) certain professional fees associated with these activities, and (2) other transformation 
costs, which include professional fees such as project management costs and costs for third party consultants who are assisting in 
the enablement of our growth initiatives. Total costs related to Project Matterhorn during the years ended December 31, 2024 and 
2023 were approximately $161.4 million and $175.2 million, respectively.
BUSINESS SEGMENTS
The amount of revenues derived from our business segments and other relevant data, including financial information about 
geographic areas and product and service lines, for the years ended December 31, 2024, 2023 and 2022, are set forth in Note 11 
to Notes to Consolidated Financial Statements included in this Annual Report.
GLOBAL RIM BUSINESS
The Global Records and Information Management ("Global RIM") Business segment includes several distinct offerings. 
Records Management, stores physical records and provides information services, vital records services, courier operations, and 
the collection, handling and disposal of sensitive documents ("Records Management") for customers in 61 countries around the 
globe.
Data Management, provides storage and rotation of backup computer media as part of corporate disaster recovery plans, including 
service and courier operations, server and computer backup services and related services offerings ("Data Management").
Global Digital Solutions, develops, implements and supports comprehensive storage and information management solutions for the 
complete lifecycle of our customers’ information, including the management of physical records, conversion of documents to digital 
formats and digital storage of information ("Global Digital Solutions"). In August 2024, we launched the InSight Digital Experience 
Platform (also referred to as DXP), a secure, software-as-a-service platform designed to automate customer workflows, enhance 
data accessibility, ensure audit compliance and optimize customer data for AI applications.
Secure Shredding, includes the scheduled pick-up of office records that customers accumulate in specially designed secure 
containers we provide and is a natural extension of our hardcopy records management operations, completing the lifecycle of a 
record. Through a combination of shredding facilities and mobile shredding units consisting of custom built trucks, we are able to 
offer secure shredding services to our customers.
Media and Archive Services, includes entertainment and media services, which help industry clients store, safeguard and deliver 
physical media of all types, and provides digital content repository systems that house, distribute and archive key media assets.
Consumer Storage, provides on-demand, valet storage for consumers ("Consumer Storage") utilizing data analytics and machine 
learning to provide effective customer acquisition and a convenient and seamless consumer storage experience.
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IRON MOUNTAIN 2024 FORM 10-K

GLOBAL DATA CENTER BUSINESS
The Global Data Center Business segment provides enterprise-class data center facilities and hyperscale-ready capacity to protect 
mission-critical assets and ensure the continued operation of our customers’ IT infrastructure with secure, reliable and flexible data 
center options. The world’s most heavily regulated organizations have trusted us as a data center operator for over 20 years, with 
five of the largest global hyperscalers among our customers.
CORPORATE AND OTHER
Corporate and Other consists primarily of our ALM and Fine Arts businesses and other corporate items ("Corporate and Other").
ALM, provides hyperscale and corporate IT infrastructure managers with services and solutions that enable the decommissioning, 
data erasure, processing and disposition, and recycling or sale of IT hardware and component assets. ALM services are enabled 
by: secure logistics, chain of custody and complete asset traceability practices, environmentally-responsible asset processing and 
recycling, and data sanitization and asset refurbishment services that enable value recovery through asset remarketing. In addition, 
ALM also offers workplace IT asset management services including storage, configuration, deployment, device support, end-of-life 
disposition and recycling or sale of employee IT devices. Our ALM services focus on protecting and eradicating customer data 
while maintaining strong, auditable and transparent chain of custody practices. 
Fine Arts, provides technical expertise in the handling, installation and storing of art ("Fine Arts").
Corporate and Other also includes costs related to executive and staff functions, including finance, human resources and IT, which 
benefit the enterprise as a whole.
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IRON MOUNTAIN 2024 FORM 10-K
3

BUSINESS ATTRIBUTES
Our business has the following attributes: 
Large, Diversified,
Global Business
The world’s most heavily regulated organizations trust us with the storage of their records. Our 
mission-critical storage offerings and related services generated approximately $6.1 billion in 
annual revenue in 2024. Our business has a highly diverse customer base of more than 240,000 
customers - with no single customer accounting for more than approximately 1% of revenue 
during the year ended December 31, 2024 - and operates in 61 countries globally. This presents 
a significant cross-sell opportunity for our expanding solutions, including digital, data center and 
ALM.
Recurring, Durable 
Revenue Stream
A majority of our revenue is recurring in nature. In our Records Management business, our 
contracted storage rental fee agreements generally range from one to five years in length. As of 
December 31, 2024, we stored more than 730 million cubic feet of physical volume and we have 
consistently experienced strong customer retention levels. In our Global Data Center Business, 
our lease durations vary by customer, with a weighted average lease expiration of 10.6 years as 
of December 31, 2024.
Comprehensive 
Information
Management Solution
As an S&P 500 REIT with approximately 1,350 locations globally and with offerings spanning 
physical storage, digitization solutions and digital storage, we are positioned to provide a holistic 
offering to our customers. We are able to cater to our customers’ physical and digital needs and to 
help guide their digital transformation journey.
Significant Owner and 
Operator
of Real Estate
We operate approximately 98 million square feet of real estate worldwide. Our owned real estate 
footprint spans to over 24 million square feet.
Limited Revenue 
Cyclicality
Historically, economic downturns have not significantly affected our storage rental business. Due 
to the durability of our total global physical volumes, the success of our revenue management 
initiatives and the growth of our Global Data Center Business, we believe we can continue to 
grow organic storage rental revenue over time.
Shifting Revenue Mix
We have identified a number of areas where we see opportunity for growth as we position 
ourselves to unlock greater value for our customers. These business lines, including Global Data 
Center, ALM and Global Digital Solutions, represent markets with strong, secular growth.
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IRON MOUNTAIN 2024 FORM 10-K

In addition, our Global Data Center Business has the following attributes:
Large Data Center
Platform with Significant
Expansion Opportunity
As of December 31, 2024, we had 416 MW of leasable capacity with an additional 864 
MW under construction or held for development.
Differentiated Compliance
and Security
We offer comprehensive compliance support as well as physical and cybersecurity. Our 
Security-in-Depth strategy integrates both technical and human security measures, with 
oversight provided by senior security leaders with military and public sector 
backgrounds. As of December 31, 2024, our data center portfolio has achieved 
numerous certifications and received third party assurance reports, making it one of the 
most comprehensive compliance programs in the industry. These certifications and 
reports on compliance include the global ISO 27001, ISO 22301, ISO 9001, SOC 2 and 
PCI-DSS standards, as well as HIPAA, NIST 800-53 and FISMA HIGH in the United 
States. The program also includes enterprise-wide certified ISO 14001 and 50001 
environmental and energy management systems and complies with ISO 14064 for 
greenhouse gas emissions, supporting our commitment to sustainability.
Efficient Access
and Flexibility
We have the ability to provide customers with a range of deployment options from one 
cabinet to an entire building, leveraging our global portfolio of hyperscale-ready and 
underground data centers. We also provide access to numerous carriers, cloud providers 
and peering exchanges with migration support.
100% Clean Energy
Data Centers
We have matched 100% of the energy consumption in our data centers with clean energy 
annually since 2017. This approach enables our Green Power Pass offering, which allows 
customers to report the power they consume at any Iron Mountain Data Center as clean 
power in their public reporting, making Iron Mountain a key part of their decarbonization 
roadmaps and goals. Our data center business is a founding signatory to the UN 
Compact on 24/7 Carbon-Free Energy (“CFE”), which seeks hour-by-hour matching of 
site consumption with local CFE by 2040.
COMPETITION
We face competition from numerous storage and information management services providers globally, as well as storage and 
information management services that are managed and operated internally by organizations. Competition for records and 
information customers is driven by factors such as pricing, reputation and reliability, the quality and security of storage solutions 
and the scope and scale of technology. While the majority of our competitors operate in only one market or region, we believe we 
provide a differentiated global offering that competes effectively in these areas.
We also compete with numerous data center developers, owners and operators, many of whom own properties comparable to ours 
in several of the same metropolitan areas where our facilities are located. We believe that competition for data center customers is 
based on availability of power, security measures, location, connectivity and rental rates, and we are confident in our ability to 
compete effectively in each of these areas. Additionally, we believe our strong brand, global footprint and excellent commercial 
relationships empower us to compete successfully and provide significant cross-selling opportunities with our existing customer 
base.
In our ALM business, we compete with both hyperscalers and individual corporate clients who manage their own asset recycling, 
disposition and management, in addition to external competitors.
HUMAN CAPITAL MANAGEMENT
EMPLOYEES
As of December 31, 2024, we employed approximately 11,150 employees in the United States and approximately 17,700 
employees outside of the United States. As of December 31, 2024, approximately 375 employees were represented by unions in 
North America and approximately 1,375 employees were represented by unions in Latin America. All union employees are currently 
under renewed labor agreements or operating under an extension agreement.
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IRON MOUNTAIN 2024 FORM 10-K
5

BENEFIT PROGRAMS
We provide our employees with benefits that are designed to support their overall physical, financial, emotional and social well-
being. These benefits vary by location but generally include health and welfare benefits, paid time off and programs to support 
financial security. Additionally, employees are able to access emotional well-being resources through global employee assistance 
programs. Certain unionized employees receive benefits through unions and are not eligible to participate in our benefit programs. 
In addition to base compensation and other usual benefits, a significant portion of full-time employees participate in some form of 
incentive-based compensation program that provides payments based on revenues, profits or attainment of specific objectives for 
the unit in which they work. 
COMPANY CULTURE
We are committed to making a meaningful impact on our customers, our people and our business by cultivating a culture that is 
firmly grounded in our values: Acting with Integrity, Owning Safety and Security, Building Customer Value, Taking Ownership and 
Promoting Inclusion and Teamwork. 
While we foster an environment of learning, collaboration, diversity and wellbeing, we know culture truly thrives in the everyday 
experience of working at Iron Mountain. 
Our culture encourages open communication and innovation while fostering trust, engagement and exceptional performance. We 
evaluate this through regular employee surveys and by leveraging data to gain a deeper understanding of our global workforce, 
and how they work. These insights collectively enable us to drive enhanced employee engagement, measure effectiveness and 
refine our approach for sustained success.
Led by our President and CEO, William Meaney, our Inclusive Leadership Alliance (the "Alliance") includes members of the 
Executive Leadership Team and plays a pivotal role in advancing our culture and driving growth. The Alliance reviews and supports 
key initiatives, monitors progress toward enterprise goals, ensures accountability through measurable targets and communicates 
achievements to stakeholders.
Our volunteer-based global employee resource groups play an essential role in supporting talent attraction, retention and 
development, and serving as valuable allies across our company. Each group is sponsored by one or more members of Iron 
Mountain’s Executive Leadership Team.
COMMUNITY INVOLVEMENT
We are committed to integrating responsible and sustainable practices throughout our organization to help our operations have a 
positive impact on the environment and the communities in which we operate. We aim to give back to the communities where we 
live and work and believe that this commitment helps in our efforts to attract and retain employees. We offer philanthropic support 
to our global community through our Living Legacy Initiative, which is our commitment to help preserve and make accessible 
cultural and historical information and artifacts. We encourage volunteerism in the communities in which we live and work through 
our Moving Mountains volunteer program, offering paid time off for employees to help community-based and civic-minded 
organizations.
INSURANCE
For strategic risk transfer purposes, we maintain a comprehensive insurance program with insurers that we believe to be reputable 
and which have adequate capitalization in amounts that we believe to be appropriate. Property insurance is purchased on a 
comprehensive basis, including flood and earthquake (including excess coverage), subject to certain policy conditions, sublimits 
and deductibles. Property is insured based upon the replacement cost of real and personal property, including leasehold 
improvements, business income loss and extra expense. Other types of insurance that we carry, which are also subject to certain 
policy conditions, sublimits and deductibles, include medical, workers’ compensation, general liability, umbrella, automobile, 
professional, cyber, warehouse legal liability and directors’ and officers’ liability policies.
GOVERNMENT REGULATION
We are required to comply with numerous laws and regulations covering a wide variety of subject matters which may have a 
material effect on our capital expenditures, earnings and competitive position.
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IRON MOUNTAIN 2024 FORM 10-K

For example, some of our currently and formerly owned or leased properties were previously used by entities other than us for 
industrial or other purposes, or were affected by waste generated from nearby properties, that involved the use, storage, 
generation and/or disposal of hazardous substances and wastes, including petroleum products. In some instances, this prior use 
involved the operation of underground storage tanks or the presence of asbestos-containing materials. Where we are aware of 
environmental conditions that require remediation, we undertake appropriate activity, in accordance with all legal requirements. 
Although we have from time to time conducted limited environmental investigations and remedial activities at some of our former 
and current facilities, we have not undertaken environmental reviews of all of our properties. We therefore may be potentially liable 
for environmental costs and may be unable to sell, rent, mortgage or use contaminated real estate owned or leased by us. Under 
various federal, state and local environmental laws, we may be liable for environmental compliance and remediation costs to 
address contamination, if any, located at owned and leased properties as well as damages arising from such contamination, 
whether or not we know of, or were responsible for, the contamination, or the contamination occurred while we owned or leased the 
property. Environmental conditions for which we might be liable may also exist at properties that we may acquire in the future. In 
addition, future regulatory action and environmental laws may impose costs for environmental compliance that do not exist today.
We transfer a portion of our risk of financial loss due to currently undetected environmental matters by purchasing an 
environmental impairment liability insurance policy, which covers all owned and leased locations. Coverage is provided for both 
liability and remediation costs.
In addition, we are subject to numerous laws and regulations relating to data privacy and cybersecurity, which are complex, change 
frequently and have tended to become more stringent over time. We have an established global privacy compliance framework and 
devote substantial resources, and may in the future have to devote significant additional resources, to facilitate compliance with 
these laws and regulations, and to investigate, defend or remedy actual or alleged violations or breaches. Any failure by us to 
comply with, or remedy any violations or breaches of, these laws and regulations could negatively impact our operations, result in 
the imposition of fines and penalties, liability and litigation, significant costs and expenses and reputational harm.
For more information about laws and regulations that could affect our business, see "Item 1A. Risk Factors" included in this Annual 
Report.
SUSTAINABILITY
At Iron Mountain, we are using our influence and expertise to drive innovations that protect and elevate the effectiveness of our 
customers’ endeavors, while also creating a meaningful, positive impact on individuals, the environment, and our overall 
performance. Iron Mountain is committed to sustainable growth, and this is highlighted through initiatives and targets within our 
company. We aim to minimize our environmental impact, foster a culture and processes that support the well-being of our global 
teams, and to be a catalyst for positive change within our communities.
We transparently report on our sustainability efforts and the advancement of our objectives by using widely adopted reporting 
frameworks such as the Global Reporting Initiative, CDP and EcoVadis. In addition, we continue to further align our reporting with 
the recommendations of the Financial Stability Board’s Task Force on Climate-related Financial Disclosures.
Our work continues to receive recognition. In 2024, the Science Based Targets initiative ("SBTi") validated our targets, which are 
aligned with the Paris Climate Agreement aspiration of limiting the global temperature increase to 1.5 degrees Celsius. Our data 
center team was recognized with the Decarbonization of Electricity award from BroadGroup International for their work and thought 
leadership on carbon-free energy.
As of December 31, 2024, we are a constituent of multiple indexes that focus on corporate sustainability standards, including 
several MSCI All Country World Indexes (ACWI), such as the ACWI Low Carbon Leaders, ACWI Climate Paris Aligned, ACWI ESG 
Leaders and ACWI Socially Responsible Index (SRI). We have also been a constituent of the FTSE4Good Index for more than ten 
years. A copy of our sustainability report is available on the "Who we are" section of our website, www.ironmountain.com, under the 
heading "Sustainability". We are not including the information contained on or available through our website as part of, or 
incorporating such information by reference into, this Annual Report.
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STRONG ENVIRONMENTAL FOCUS
•
Iron Mountain provides a Green Power Pass solution in the data center market to help customers manage their carbon 
footprint.
•
Founding signatory of the UN Compact on 24/7 Carbon Free Energy. As of 2024, Iron Mountain has over 190 locations 
globally with the ability to track and match renewable energy usage on an hourly basis.
•
87% of our global electricity use was covered by renewable sources in 2023.
•
Iron Mountain has near and long-term science-based emissions reduction targets that have been validated by SBTi.
•
Reduced Scope 1 and 2 greenhouse gas (GHG) emissions by 10% from 2022 to 2023.
•
Achieved a landfill diversion rate of 81% in 2023, reducing waste to landfill and lowering emissions associated with waste 
processing.
INTERNET WEBSITE
Our internet address is www.ironmountain.com. Under the "Investors" section on our website, we make available, free of charge, 
our Annual Reports on Form 10-K, our Quarterly Reports on Form 10-Q, our Current Reports on Form 8-K and amendments to 
those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act") as 
soon as reasonably practicable after such forms are filed with or furnished to the SEC. We are not including the information 
contained on or available through our website as a part of, or incorporating such information by reference into, this Annual Report. 
Copies of our corporate governance guidelines, code of ethics and the charters of our audit, compensation, finance, nominating 
and governance and risk and safety committees are available on the "Investors" section of our website, www.ironmountain.com, 
under the heading "Corporate Governance".
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ITEM 1A. RISK FACTORS.
We face many risks. If any of the events or circumstances described below actually occur, we and our businesses, financial 
condition or results of operations could suffer, and the trading price of our debt or equity securities could decline. Our current and 
potential investors should consider the following risks and the information contained under the heading "Cautionary Note Regarding 
Forward-Looking Statements" before deciding to invest in our securities.
BUSINESS RISKS
Failure to execute our strategic growth plan may adversely impact our financial condition and results of operations.
As part of our strategic growth plan, including Project Matterhorn, we expect to invest in our existing businesses, including records 
and information management storage and services businesses in our higher-growth markets, data centers, digital solutions, ALM 
business and other complementary businesses, and in new businesses, business strategies, products, services, technologies and 
geographies. These initiatives may involve significant risks and uncertainties, including:
•
our inability to maintain relationships with key customers and suppliers or to execute on our plan to incorporate the digitization of 
our customers’ records and new digital information technologies into our offerings;
•
failure to achieve satisfactory returns on new product offerings, acquired companies, joint ventures, growth initiatives or other 
investments, particularly in markets where we do not currently operate or have a substantial presence;
•
our inability to identify suitable companies to acquire, invest in or partner with;
•
our inability to complete acquisitions or investments on satisfactory terms;
•
our inability to structure acquisitions or investments in a manner that complies with our debt covenants or is consistent with our 
leverage ratio goals;
•
challenges in managing costs to offset the impact of inflationary pressure;
•
increased demands on our management, operating systems, internal controls and financial and physical resources and, if 
necessary, our inability to successfully expand our infrastructure; 
•
incurring additional debt necessary to acquire suitable companies or make other growth investments if we are unable to pay the 
purchase price or make the investment out of working capital or the issuance of our common stock or other equity securities;
•
our inability to manage the budgeting, forecasting and other process control issues presented by future growth, particularly with 
respect to new lines of business;
•
insufficient revenues to offset expenses and liabilities associated with new investments; and
•
our inability to attract, develop and retain skilled employees to lead and support our strategic growth plan, particularly in new 
businesses, technologies, products or offerings outside our core competencies.
Our new ventures are inherently risky and we can provide no assurance that such strategies and offerings will be successful in 
achieving the desired returns within a reasonable timeframe, if at all, and that they will not adversely affect our business, 
reputation, financial condition and operating results. 
If stored records and tapes become less active, our service revenue growth and profits from related services may decline.
Our Records Management and Data Management service revenue growth is being negatively impacted by declining activity rates 
as stored records and tapes are becoming less active and more archival. The amount of information available to customers digitally 
or in their own information systems has been steadily increasing in recent years, and we believe this trend will continue. As a result, 
our customers are less likely than they have been in the past to retrieve records and rotate tapes, thereby reducing their activity 
levels. At the same time, many of our costs related to records and tape related services remain relatively fixed. In addition, our 
reputation for providing secure information storage is critical to our success, and actions to manage cost structure, such as 
outsourcing certain transportation, security or other functions, could negatively impact our reputation and adversely affect our 
business, and, if we are unable to appropriately align our cost structure with decreased levels of service activity, our operating 
results could be adversely affected. 
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Our customers continue to evolve the way they store records, which could impact our storage revenue.
We derive substantial revenues from rental fees for the storage of physical records and computer backup media and from storage 
related services. Volume in and demand for our traditional storage related services has evolved as our customers adopt alternative 
storage technologies or as retention requirements change, which may require significantly less space than traditional physical 
records and tape storage; however, volumes in our Global RIM Business segment were relatively steady in 2024 and we expect 
them to remain relatively consistent in the near term. We can provide no assurance that our customers will continue to store most 
or a portion of their records as paper documents or as tapes, or that the paper documents or tapes they do store with us will require 
our storage related services at the same levels as they have in the past. A significant shift by our customers to storage of data 
through non-paper or non-tape-based technologies, whether now existing or developed in the future, could adversely affect our 
businesses. In addition, the digitization of records may shift our revenue mix from the more predictable storage revenue to service 
revenue, which is inherently more volatile.
We and our customers are subject to laws and governmental regulations relating to data privacy and cybersecurity, and our 
customers’ demands in this area are increasing. This may cause us to incur significant expenses and non-compliance with such 
regulations and demands could harm our business.
We and our customers are subject to numerous laws and regulations relating to data privacy and cybersecurity. These regulations 
are complex, change frequently and have tended to become more stringent over time. In addition, a growing number of regulatory 
bodies have adopted data breach notification requirements and increased enforcement of regulations regarding the use, access, 
accuracy and security of personal information. Finally, as a result of the continued emphasis on information security and instances 
in which personal information has been compromised, our customers are requesting that we take increasingly sophisticated 
measures to enhance security and comply with cybersecurity and data privacy regulations and that we assume higher liability 
under our contracts. 
We have an established global privacy compliance program and devote substantial resources, and may in the future have to 
devote significant additional resources, to facilitate compliance with global laws and regulations, our customers’ data privacy, data 
residency and security demands, and to investigate, defend or remedy actual or alleged violations or breaches. Any failure by us to 
comply with, or remedy any violations or breaches of, laws and regulations or customer requirements could negatively impact our 
operations, result in the imposition of fines and penalties, contractual liability and litigation, significant costs and expenses and 
reputational harm.
Expansion into Global Digital Solutions and ALM services means that our privacy and security risk profile is increasing. In 
particular, we are hosting increasing volumes of customer digital data, including sensitive and confidential data, and disposing of 
customer data-bearing devices. This may result in increased regulatory exposure, contractual liability and security expectations 
from customers. Finally, emerging AI regulations, increasing use of AI and generative AI tools and their integration into our 
businesses may require additional resources and create additional compliance and cybersecurity risks.
Attacks on our internal IT systems could damage our reputation, cause us to lose revenues and adversely affect our business, 
financial condition and results of operations.
Our reputation for providing secure information storage to customers is critical to the success of our business. Our reputation or 
brand, and specifically, the trust our customers place in us, could be negatively impacted in the event of perceived or actual failures 
by us to store information securely. Although we seek to prevent and detect attempts by unauthorized users to gain access to our 
IT systems, and incur significant costs to do so, our IT and network infrastructure has in the past been and may in the future be 
vulnerable to attacks by hackers, including state-sponsored organizations with significant financial and technological resources, 
breaches due to employee error, fraud or malice or other disruptions (including, but not limited to, computer viruses and other 
malware, denial of service and ransomware), which may involve a breach requiring us to notify regulators, clients or employees 
and enlist identity theft protection. Moreover, until we have migrated businesses we acquire onto our IT systems or ensured 
compliance with our information technology security standards, we have in the past and may in the future face additional risks 
because of the continued use of predecessor IT systems. We utilize remote work arrangements and outsource certain support 
services, including cloud storage systems and cloud computing services, to third parties, which has in the past and may in the 
future subject our IT and other sensitive information to additional risk. A successful breach of the security of our IT systems could 
lead to theft or misuse of our customers’ proprietary or confidential information or our employees’ personal information and result in 
third party claims against us, regulatory penalties and reputational harm. Although we maintain insurance coverage for various 
cybersecurity risks, there is no guarantee that all costs or losses incurred will be fully insured. Damage to our reputation could 
make us less competitive, which could negatively impact our business, financial condition and results of operations.
Failure to successfully integrate acquired businesses could negatively impact our balance sheet and results of operations.
Strategic acquisitions are an important element of our growth strategy and the success of any acquisition we make depends in part 
on our ability to integrate the acquired business and realize anticipated synergies. The process of integrating acquired businesses, 
particularly in new markets or for new offerings, may involve difficulties and may require a disproportionate amount of our 
management’s attention and our financial and other resources.
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For example, the success of our significant acquisitions depends, in large part, on our ability to realize the anticipated benefits, 
including cost savings or revenue acceleration from combining the acquired businesses with ours. To realize these anticipated 
benefits, we must be able to successfully integrate our business and the acquired businesses, and this integration is complex and 
time-consuming. We may encounter challenges in the integration process including the following:
•
challenges and difficulties associated with managing our larger, more complex, company;
•
conforming standards, controls, procedures and policies, business cultures and compensation and benefits structures between 
the two businesses;
•
consolidating corporate and administrative infrastructures;
•
coordinating geographically dispersed organizations;
•
retaining critical acquired talent;
•
potential unknown liabilities and unforeseen expenses or delays associated with an acquisition; and
•
our ability to deliver on our strategy going forward.
Further, our acquisitions subject us to liabilities (including tax liabilities) that may exist at an acquired company, some of which may 
be unknown. Although we and our advisors conduct due diligence on the businesses we acquire, there can be no guarantee that 
we are aware of all liabilities of an acquired company. These liabilities, and any additional risks and uncertainties related to an 
acquired company not known to us or that we may deem immaterial or unlikely to occur at the time of the acquisition, could 
negatively impact our future business, financial condition and results of operations.
We can give no assurance that we will ultimately be able to effectively integrate and manage the operations of any acquired 
business or realize anticipated synergies. The failure to successfully integrate the cultures, operating systems, procedures and 
information technologies of an acquired business could have a material adverse effect on our financial condition and results of 
operations.
Our future growth depends in part upon our ability to continue to effectively manage and execute on revenue management.
Our organic revenue growth has been positively impacted by our ability to effectively introduce, expand and monitor revenue 
management. If we are not able to continue and effectively manage pricing, our results of operations could be adversely affected 
and we may not be able to execute on our strategic growth plan.
Our customer contracts may not always limit our liability and may sometimes contain terms that could subject us to significant 
liability or lead to disputes in contract interpretation.
Our customer contracts typically contain standardized provisions limiting our liability regarding the services we perform and the loss 
or destruction of, or damage to, records, information or other items stored with us; however, some of our contracts with large 
customers and governmental entities and some of the contracts assumed in our acquisitions contain no such limits or contain non-
standard limits. We can provide no assurance that our limitation of liability provisions will be enforceable in all instances or, if 
enforceable, that they would otherwise protect us from liability. In the past, we have had relatively few disputes with our customers 
regarding the terms of their customer contracts, and most disputes to date have not been material, but we can provide no 
assurance that we will not have material disputes in the future. Moreover, as we expand our operations into new businesses, 
including Global Digital Solutions, ALM, and the storage of valuable items, and respond to customer demands for higher limitation 
of liability, our exposure to contracts with higher or no limitations of liability and disputes with customers over contract interpretation 
may increase. Although we maintain a comprehensive insurance program, we can provide no assurance that we will be able to 
maintain insurance policies on acceptable terms or with high enough coverage amounts to cover losses to us in connection with 
customer contract disputes.
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As a global company, we are subject to the unique risks of operating in many countries.
As of December 31, 2024, we operated in 61 countries. The global nature of our business and our growth strategy, which includes 
continued acquisitions and investments in countries where we do not currently operate, is subject to numerous risks, including:
•
fluctuations of currency exchange rates in the markets in which we operate;
•
the impact of laws and regulations that apply to us in countries in which we operate or have made investments; in particular, we 
are subject to sanctions and anti-corruption laws, such as the Foreign Corrupt Practices Act and the United Kingdom Bribery Act, 
and, although we have implemented internal controls, policies and procedures and training to deter prohibited practices, our 
employees, partners, contractors or agents may violate or circumvent such policies and the law; 
•
costs and difficulties associated with managing global operations, including cross-border sales;
•
the volatility of certain economies in which we operate;
•
political uncertainties and changes in the global political climate or other global events, such as war or other military conflict, 
trade wars or global pandemics, which may create additional risk in relation to our global operations, which may become more 
pronounced as we consolidate operations across countries and need to move data across borders; 
•
the risk that business partners upon whom we depend for technical assistance or management and acquisition expertise in 
some markets will not perform as expected;
•
difficulties attracting and retaining local management and key employees to operate our business in certain countries; and
•
cultural differences and differences in business practices and operating standards, as well as risks and challenges in expanding 
into countries where we have no prior operational experience.
If we fail to meet our commitment to transition to more renewable and sustainable sources of energy, it may negatively impact our 
ability to attract and retain customers, employees and investors who focus on this commitment. Furthermore, changes to 
environmental laws and standards may increase the cost to operate some of our businesses. This could impact our results of 
operations, our competitiveness and the trading value of our stock.
We have made a commitment to prioritize sustainable energy practices, reduce our carbon footprint and transition to more 
renewable and sustainable sources of energy, particularly in our Global Data Center Business. We have made progress towards 
reducing our carbon footprint, but if we are not successful in continuing this reduction or if our customers, employees and investors 
are not satisfied with our sustainability efforts, it may negatively impact our ability to attract and retain customers, employees and 
investors who focus on this commitment. This could negatively impact our results of operations and the trading of our stock.
Furthermore, changes in environmental laws in any jurisdiction in which we operate could increase compliance costs or impose 
limitations on our operations. For example, our emergency generators at our data centers are subject to regulations and permit 
requirements governing air pollutants, and the heating, ventilation and air conditioning and fire suppression systems at some of our 
data centers and data management locations may include ozone-depleting substances that are subject to regulation. While 
environmental regulations do not normally impose material costs upon operations at our facilities, unexpected events, equipment 
malfunctions, human error and changes in law or regulations, among other factors, could result in unexpected costs, which could 
be material.
Our use of joint ventures or other co-investment vehicles could expose us to additional risks and liabilities, including our lack of sole 
decision-making authority and our reliance on joint venture or other co-investment vehicle partners who may have economic and 
business interests that are inconsistent with our business interests.
As part of our growth strategy, particularly in connection with our international and data center expansion, we currently, and may in 
the future, co-invest with third parties using joint ventures or other co-investment vehicles. These ventures can result in our holding 
non-controlling interests in, or not having sole control over managing the affairs of, a property or portfolio of properties, business, 
partnership, joint venture or other entity. In connection with our pursuit or entrance into any such venture, we may be subject to 
additional risks, including:
•
our ability to sell our interests in the venture may be limited by the venture agreement;
•
we may not have the right to exercise sole decision-making authority regarding the properties, business, partnership, venture or 
other entity;
•
we may be liable for the venture's failure to comply with applicable law despite only having a non-controlling interest in the 
venture;
•
if our partners become bankrupt or fail to fund their share of required capital contributions, we may choose or be required to 
contribute unplanned capital; 
•
our partners may have economic, tax or other interests or goals that are inconsistent with our interests or goals, which could 
affect our ability to negotiate satisfactory venture terms, to operate the property or business or to maintain our qualification for 
taxation as a REIT; and
•
disputes may arise between us and our partners that result in litigation or arbitration that would increase our expenses and divert 
the attention of our officers and directors.
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Each of these factors may result in returns on these investments being less than we expect or in losses, and our financial and 
operating results may be adversely affected. 
Significant costs or disruptions at our data centers could adversely affect our business, financial condition and results of operations.
Our Global Data Center Business depends on providing customers with highly reliable facilities, power infrastructure and 
operations solutions, and we will need to retain and hire qualified personnel to manage our data centers. Service interruptions or 
significant equipment damage could result in difficulty maintaining service-level commitment obligations that we owe to certain of 
our customers. Service interruptions or equipment damage may occur at one or more of our data centers because of numerous 
factors, including: human error; equipment failure; physical, electronic and cybersecurity breaches; fire, hurricane, flood, 
earthquake and other natural disasters; water damage; fiber cuts; extreme temperatures; power loss or telecommunications failure; 
war, terrorism and any related conflicts or similar events worldwide; and sabotage and vandalism. 
We purchase significant amounts of electricity and water for cooling from suppliers that are subject to environmental laws, 
regulations and permit requirements. These environmental requirements are subject to material change, which could result in 
increases in our suppliers’ compliance costs that may be passed through to us or otherwise constrain the availability of such 
resources. In addition, climate change may increase the likelihood that our data centers are affected by some of these factors.
While these risks could impact our overall business, they could have a more significant impact on our Global Data Center 
Business, where we have service-level commitment obligations to certain of our customers. As a result, service interruptions or 
significant equipment damage at our data centers could result in difficulty maintaining service-level commitments to these 
customers and potential claims related to such failures. Because our data centers are critical to many of our customers’ 
businesses, service interruptions or significant equipment damage at our data centers could also result in lost profits or other 
indirect or consequential damages to our customers, which could in turn result in contractual liability to our customers or impair our 
ability to obtain and retain customers, which would adversely affect both our ability to generate revenue and our results of 
operations.
We also rely on third party telecommunications carriers to provide internet connectivity to our customers. These carriers may elect 
not to offer or to restrict their services within our data centers or may elect to discontinue such services. Furthermore, carriers may 
face business difficulties, which could affect their ability to provide telecommunications services or the quality of such services. If 
connectivity is interrupted or terminated, our financial condition and results of operations may be adversely affected. Events such 
as these may also impact our reputation as a data center provider which could adversely affect our results of operations.
Our Global Data Center Business is susceptible to regional and local costs of power, power shortages, planned or unplanned 
power outages and limitations on the availability of adequate power resources. We rely on third parties to provide power to our data 
centers. We are therefore subject to an inherent risk that such third parties may fail to deliver such power in adequate quantities or 
on a consistent basis. If the power delivered to our data centers is insufficient or interrupted, we would be required to provide power 
through the operation of our on-site generators, generally at a significantly higher operating cost. Additionally, global fluctuations in 
the price of power can increase the cost of energy, and we may be limited in our ability to, or may not always choose to, pass these 
increased costs on to our customers. 
We face additional risks in expanding our Global Data Center Business, including the significant amount of capital required.
Expanding our Global Data Center Business requires significant capital. In addition, we may be required to commit significant 
operational and financial resources in connection with the organic growth of our Global Data Center Business substantially in 
advance of such newly developed data centers generating revenue.
We are currently experiencing rising construction costs which reflect the increase in cost of labor and raw materials, as well as 
supply chain and logistical challenges. Unexpected disruptions to our supply chain, continued inflationary pressures or high interest 
rates, tariffs, delays in construction, limited financing availability, constrained supplies of new power, or changes in customer 
requirements could significantly affect the cost or timing of our planned expansion projects, have consequences under our project 
financing and partnership agreements, and interfere with our ability to meet commitments to customers who have contracted for 
space in new data centers under construction. 
All construction-related data center projects require us to carefully select, manage, and rely on the experience of one or more 
design firms, general contractors, and associated subcontractors during the design and construction process, and to obtain critical 
government permits and authorizations. Should a design firm, general contractor, significant subcontractor, or key supplier 
experience financial or operational problems during the design or construction process or fail to perform properly, or should we be 
unable to obtain, or experience delays in obtaining, all necessary zoning, land-use, building, occupancy and other governmental 
permits and authorizations, we could experience significant delays, increased costs to complete the project, penalties under 
customer preleases and other negative impacts to the expected return on our committed capital. 
There can be no assurance we will have sufficient customer demand to support the data centers we have acquired or built, or that 
we will not be adversely affected by the risks noted above under "Significant costs or disruptions at our data centers could 
adversely affect our business, financial condition and results of operations", which could make it difficult for us to realize expected 
returns on our investments, if any.
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Our ALM business may be subject to additional risks, including those related to its client and geographic concentration, 
government trade policies, and macroeconomic conditions. 
A significant portion of the revenue from our ALM business is derived from a limited number of clients and tied to cyclical projects 
involving the decommissioning and destruction of IT assets and the disposition of components of such assets to purchasers in 
concentrated geographies. Though we generally enter into long-term contracts with such clients, the volume of work we perform for 
specific clients may vary over the life of each contract due to various factors including changes in client behavior or macroeconomic 
conditions impacting the availability of new IT assets in the marketplace. There can be no assurance that we will be able to retain 
our current volumes, existing clients or that, if we were to lose one or more of our significant clients, we would be able to replace 
such clients with clients that generate a comparable amount of revenue. Further, many of the purchasers of the decommissioned IT 
asset components are geographically concentrated, particularly within mainland China. If governments enact trade policies or 
environmental regulations that restrict or increase the cost of exporting IT assets into China or other markets in which we sell 
decommissioned IT asset components or recyclable materials, or increase the enforcement of such policies, then the revenue from 
the sale of these assets may be negatively impacted. Additionally, uncertain macroeconomic conditions, particularly within 
mainland China, may reduce our purchasers’ demand for the IT asset components that we sell, thereby reducing our revenues and 
earnings.
Failure to comply with certain regulatory and contractual requirements under our United States Government contracts could 
adversely affect our revenues, operating results and financial position and reputation.
Having the United States Government as a customer subjects us to certain regulatory and contractual requirements. Failure to 
comply with these requirements could subject us to investigations, price reductions, up to treble damages, and civil penalties. 
Noncompliance with certain regulatory and contractual requirements could also result in us being suspended or debarred from 
future United States Government contracting. We may also face private derivative securities claims because of adverse 
government actions. Any of these outcomes could have a material adverse effect on our revenues, operating results, financial 
position and reputation.
We may be subject to certain costs and potential liabilities associated with the real estate required for our business.
As of December 31, 2024, we operated approximately 1,350 facilities worldwide, including approximately 550 in the United States, 
and face special risks attributable to the real estate we own or lease, which could have a material adverse effect on our revenues, 
operating results and financial position. Such risks include:
•
acquisition and occupancy costs that make it difficult to meet anticipated margins and difficulty locating suitable facilities due to a 
relatively small number of available buildings having the desired characteristics in some real estate markets; 
•
increases in rent expense and property taxes as a result of the increasing demand for industrial real estate;
•
uninsured losses or damage to our facilities due to an inability to obtain full coverage on a cost-effective basis for some 
casualties, such as fires, hurricanes and earthquakes, or any coverage for certain losses, such as losses from riots or terrorist 
activities;
•
inability to use our real estate holdings effectively and costs associated with vacating or consolidating facilities if the demand for 
physical storage were to diminish;
•
liability under environmental laws for the costs of investigation and cleanup of contaminated real estate owned or leased by us, 
whether or not (i) we know of, or were responsible for, the contamination, or (ii) the contamination occurred while we owned or 
leased the property; and
•
costs of complying with fire protection and safety standards.
Some of our current and formerly owned or leased properties were previously used by entities other than us for industrial or other 
purposes, or were affected by waste generated from nearby properties, that involved the use, storage, generation and/or disposal 
of hazardous substances and wastes, including petroleum products. In some instances, this prior use involved the operation of 
underground storage tanks or the presence of asbestos-containing materials. Where we are aware of environmental conditions that 
require remediation, we undertake appropriate activity, in accordance with all legal requirements. Although we have from time to 
time conducted limited environmental investigations and remedial activities at some of our former and current facilities, we have not 
undertaken an environmental review of all of our properties, including those we have acquired. We therefore may be potentially 
liable for environmental costs like those discussed above and may be unable to sell, rent, mortgage or use contaminated real 
estate owned or leased by us. Environmental conditions for which we might be liable may also exist at properties that we may 
acquire in the future. In addition, future regulatory action and environmental laws may impose costs for environmental compliance 
that do not exist today.
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Unexpected events, including those resulting from climate change or geopolitical events, could disrupt our operations and 
adversely affect our reputation and results of operations.
Unexpected events, including fires or explosions at our facilities, war or other military conflict, terrorist activities, natural disasters 
such as earthquakes and wildfires, unplanned power outages, supply disruptions, failure of equipment or systems, and severe 
weather events, such as droughts, heat waves, hurricanes, and flooding, could adversely affect our reputation and results of 
operations through physical damage to our facilities, equipment and customers' inventory and through physical damage to, or 
disruption of, local infrastructure. During the past several years, we have seen an increase in the frequency and intensity of severe 
weather events and we expect this trend to continue due to climate change. Some of our key facilities worldwide are vulnerable to 
severe weather events, and global weather pattern changes may also pose long-term risks of physical impacts to our business. 
Our customers rely on us to securely store and timely retrieve their critical information, and, while we maintain disaster recovery 
and business continuity plans that would be implemented in these situations, these unexpected events could result in customer 
service disruption, physical damage to one or more key operating facilities and the information stored in those facilities, the closure 
of one or more key operating facilities or the disruption of information systems, each of which could negatively impact our 
reputation and results of operations. In addition, these unexpected events could negatively impact our reputation if such events 
result in adverse publicity, governmental investigations or litigation or if customers do not otherwise perceive our response to be 
adequate. 
Fluctuations in commodity prices may affect our operating revenues and results of operations.
Our operating revenues and results of operations are impacted by significant changes in commodity prices. In particular, our secure 
shredding operations generate revenue from the sale of shredded paper for recycling. Additionally, our ALM business may be 
affected by the prices of scrap metals. Significant declines in the cost of paper or scrap metals may negatively impact our revenues 
and results of operations, and increases in other commodity prices, including steel, may negatively impact our results of operations.
Failure to manage and adequately implement our new IT systems could negatively affect our business.
We rely on IT infrastructure, including hardware, networks, software, people and processes, to provide information to support 
assessments and conclusions about our operating performance. We are in the process of upgrading a number of our IT systems, 
including consolidating our existing finance operations platforms, and we face risks relating to these transitions. For example, we 
may incur greater costs than we anticipate training our personnel on the new systems, we may experience service disruptions or 
errors in accurately capturing data or retaining our records, and we may be delayed in meeting our various reporting obligations. 
There can be no assurance that we will manage our IT systems and implement these new systems as planned or that we will do so 
without disruptions to our operations, which could have an adverse effect on our business, financial condition, results of operations 
and cash flows.
RISKS RELATED TO OUR INDEBTEDNESS
Our indebtedness could adversely affect our financial health and prevent us from fulfilling our obligations under our various debt 
instruments.
As of December 31, 2024, our total long-term debt was approximately $13,836.4 million, stockholders' deficit was approximately 
$503.1 million and we had cash and cash equivalents of approximately $155.7 million. Our indebtedness could have important 
consequences to our current and potential investors. These risks include:
•
inability to satisfy our obligations with respect to our various debt instruments;
•
inability to make borrowings to fund future working capital, capital expenditures and strategic growth opportunities, including 
acquisitions, further organic development of, and investment into, our Global Data Center, ALM and Global Digital Solutions 
businesses and other service offerings, and other general corporate requirements, including possible required repurchases, 
redemptions or prepayments of our various indebtedness;
•
limits on our distributions to stockholders; in this regard if these limits prevented us from satisfying our REIT distribution 
requirements, we could fail to remain qualified for taxation as a REIT or, if these limits do not jeopardize our qualification for 
taxation as a REIT but do nevertheless prevent us from distributing 100% of our REIT taxable income, we will be subject to 
federal corporate income tax, and potentially a nondeductible excise tax, on the retained amounts;
•
limits on future borrowings under our existing or future credit arrangements, which could affect our ability to pay our 
indebtedness or to fund our other liquidity needs;
•
inability to generate sufficient funds to cover required interest payments;
•
restrictions on our ability to refinance our indebtedness on commercially reasonable terms;
•
limits on our flexibility in planning for, or reacting to, changes in our business and the information management services industry; 
and
•
inability to adjust to adverse economic conditions that could place us at a disadvantage to our competitors with less debt and 
who, therefore, may be able to take advantage of opportunities that our indebtedness prevents us from pursuing.
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IRON MOUNTAIN 2024 FORM 10-K
15

Certain of our indebtedness, including indebtedness under our Credit Agreement (as defined below), is paid at floating interest 
rates, and as a result, our interest expense or the cost of our debt may increase due to rising interest rates or changes to 
benchmark rates.
Restrictive debt covenants may limit our ability to pursue our growth strategy.
Our Credit Agreement and our indentures contain covenants restricting or limiting our ability to, among other things:
•
incur additional indebtedness;
•
pay dividends or make other restricted payments;
•
make asset dispositions;
•
create or permit liens;
•
sell, transfer or exchange assets;
•
guarantee certain indebtedness;
•
make acquisitions and other investments; and
•
enter into partnerships, joint ventures and co-investment vehicles.
These restrictions and our long-term commitment to maintain our leverage ratio may adversely affect our ability to pursue 
acquisitions and other growth strategies, including our strategic growth plan.
We may not have the ability to raise the funds necessary to finance the repurchase of outstanding senior notes upon a change of 
control event as required by our indentures.
Upon the occurrence of a "change of control", as defined in our indentures, we will be required to offer to repurchase all of our 
outstanding senior notes. However, it is possible that we will not have sufficient funds at the time of a change of control to make the 
required repurchase of any outstanding notes or that restrictions in our Credit Agreement will not allow such repurchases. Failure to 
make the required repurchases could result in cross defaults or payment acceleration events under our other debt instruments. 
Certain important corporate events, however, such as leveraged recapitalizations that would increase the level of our indebtedness, 
would not constitute a "change of control" under our indentures.
IMI is a holding company, and, therefore, its ability to make payments on its various debt obligations depends in large part on the 
operations of its subsidiaries.
IMI is a holding company; substantially all of its assets consist of the equity in its subsidiaries, and substantially all of its operations 
are conducted by its direct and indirect consolidated subsidiaries. As a result, its ability to make payments on its debt obligations 
will be dependent upon the receipt of sufficient funds from its subsidiaries, whose ability to distribute funds may be limited by local 
capital requirements, joint venture and co-investment vehicle structures and other applicable restrictions. However, our various 
debt obligations are guaranteed, on a joint and several and full and unconditional basis, by IMI’s U.S. subsidiaries that represent 
the substantial majority of its U.S. operations.
RISKS RELATED TO OUR TAXATION AS A REIT
If we fail to remain qualified for taxation as a REIT, we will be subject to tax at corporate income tax rates and will not be able to 
deduct distributions to stockholders when computing our taxable income.
We have elected to be taxed as a REIT for federal income tax purposes beginning with our 2014 taxable year. We believe that our 
organization and method of operation comply with the rules and regulations promulgated under the Internal Revenue Code of 
1986, as amended (the "Code"), such that we will continue to qualify for taxation as a REIT. However, we can provide no assurance 
that we will remain qualified for taxation as a REIT. We also have invested in subsidiaries that have elected or that we expect will 
elect to be taxed as REITs and therefore must independently satisfy all REIT qualification requirements. We may in the future invest 
in other such subsidiary REITs. If such a subsidiary REIT were to fail to qualify as a REIT, it may cause us to fail to remain qualified 
for taxation as a REIT. If we fail to remain qualified for taxation as a REIT, including as a result of a cascading failure of any 
subsidiary REIT to remain qualified as a REIT, we will be subject to federal income taxation at corporate income tax rates unless 
certain relief provisions apply.
Qualification for taxation as a REIT involves the application of highly technical and complex provisions of the Code to our 
operations, as well as various factual determinations concerning matters and circumstances not entirely within our control. There 
are limited judicial or administrative interpretations of applicable REIT provisions of the Code.
If, in any taxable year, we fail to remain qualified for taxation as a REIT and are not entitled to relief under the Code:
•
we will not be allowed a deduction for distributions to stockholders in computing our taxable income;
•
we will be subject to federal and state income tax on our taxable income at regular corporate income tax rates; and
•
we would not be eligible to elect REIT status again until the fifth taxable year that begins after the first year for which we failed to 
qualify for taxation as a REIT.
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IRON MOUNTAIN 2024 FORM 10-K

Any such corporate tax liability could be substantial and would reduce the amount of cash available for other purposes. If we fail to 
remain qualified for taxation as a REIT, we may need to borrow additional funds or liquidate some investments to pay any 
additional tax liability. Accordingly, funds available for investment and distributions to stockholders could be reduced.
As a REIT, failure to make required distributions would subject us to federal corporate income tax.
We expect to continue paying regular quarterly distributions; however, the amount, timing and form of our regular quarterly 
distributions will be determined, and will be subject to adjustment, by our board of directors. To remain qualified for taxation as a 
REIT, we are generally required to distribute at least 90% of our REIT taxable income (determined without regard to the dividends 
paid deduction and excluding net capital gain) each year, or in limited circumstances, the following year, to our stockholders. 
Generally, we expect to distribute all or substantially all of our REIT taxable income. If our cash available for distribution falls short 
of our estimates, we may be unable to maintain distributions that approximate our REIT taxable income and may fail to remain 
qualified for taxation as a REIT. In addition, our cash flows from operations may be insufficient to fund required distributions as a 
result of nondeductible expenditures or as a result of differences in timing between the actual receipt of income and the payment of 
expenses and the recognition of income and expenses for federal income tax purposes.
To the extent that we satisfy the 90% distribution requirement but distribute less than 100% of our REIT taxable income, we will be 
subject to federal corporate income tax on our undistributed taxable income. In addition, we will be subject to a 4% nondeductible 
excise tax on our undistributed taxable income if the actual amount that we distribute to our stockholders for a calendar year is less 
than the minimum amount specified under the Code.
We may be required to borrow funds, sell assets or raise equity to satisfy our REIT distribution requirements, to comply with asset 
ownership tests or to fund capital expenditures, future growth and expansion initiatives.
In order to satisfy our REIT distribution requirements and maintain our qualification and taxation as a REIT, or to fund capital 
expenditures, future growth and expansion initiatives, we may need to borrow funds, sell assets or raise equity, even if our financial 
condition or the then-prevailing market conditions are not favorable for these borrowings, sales or offerings. Furthermore, the REIT 
distribution requirements and our commitment to investors on dividend growth may result in increasing our financing needs to fund 
capital expenditures, future growth and expansion initiatives, which would increase our indebtedness. An increase in our 
outstanding debt could lead to a downgrade of our credit ratings, which could negatively impact our ability to access credit markets. 
Further, certain of our current debt instruments limit the amount of indebtedness we and our subsidiaries may incur. Additional 
financing, therefore, may be unavailable, more expensive or restricted by the terms of our outstanding indebtedness. For a 
discussion of risks related to our substantial level of indebtedness, see "Risks Related to Our Indebtedness".
Complying with REIT requirements may limit our flexibility, cause us to forgo otherwise attractive opportunities that we would 
otherwise pursue to execute our strategic growth plan, or otherwise reduce our income and amounts available for distribution to our 
stockholders.
To remain qualified for taxation as a REIT, we must satisfy tests concerning, among other things, the sources of our income, the 
nature and diversification of our assets and the amounts we distribute to our stockholders. Thus, compliance with these tests may 
require us to refrain from certain activities and may hinder our ability to make certain attractive investments, including the purchase 
of non-REIT qualifying operations or assets, the expansion of non-real estate activities, and investments in the businesses to be 
conducted by our taxable REIT subsidiaries ("TRSs"), and, to that extent, limit our opportunities and our flexibility to change our 
business strategy and execute on our strategic growth plan. This may restrict our ability to acquire certain businesses, enter into 
joint ventures or co-investment vehicles, or acquire minority interests of companies. Furthermore, acquisition opportunities in 
domestic and international markets may be adversely affected if we need or require the target company to comply with some REIT 
requirements prior to closing.
We conduct a significant portion of our business activities, including our information management services businesses and several 
of our international operations, through domestic and foreign TRSs. Under the Code, no more than 20% of the value of the assets 
of a REIT may be represented by securities of one or more TRSs. Similar rules apply to other nonqualifying assets. These 
limitations may affect our ability to make additional investments in non-REIT qualifying operations or assets or in international 
operations through TRSs.
If we fail to comply with specified asset ownership tests applicable to REITs as measured at the end of any calendar quarter, we 
generally must correct such failure within 30 days after the end of the applicable calendar quarter or qualify for statutory relief 
provisions to avoid losing our qualification for taxation as a REIT. As a result, we may be required to liquidate assets or to forgo our 
pursuit of otherwise attractive investments or executing on portions of our strategic growth plan. These actions may reduce our 
income and amounts available for distribution to our stockholders.
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IRON MOUNTAIN 2024 FORM 10-K
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As a REIT, we are limited in our ability to fund distribution payments using cash generated through our TRSs.
Our ability to receive distributions from our TRSs is limited by the rules with which we must comply to maintain our qualification for 
taxation as a REIT. In particular, at least 75% of our gross income for each taxable year as a REIT must be derived from real 
estate, which generally includes gross income from providing customers with secure storage space or colocation or wholesale data 
center space. Consequently, no more than 25% of our gross income may consist of dividend income from our TRSs and other 
nonqualifying types of income. Thus, our ability to receive distributions from our TRSs may be limited, which may impact our ability 
to fund distributions to our stockholders using cash flows from our TRSs. Specifically, if our TRSs become highly profitable, we 
might become limited in our ability to receive net income from our TRSs in an amount required to fund distributions to our 
stockholders commensurate with that profitability.
In addition, a significant amount of our income and cash flows from our TRSs is generated from our international operations. In 
many cases, there are local withholding taxes and currency controls that may impact our ability or willingness to repatriate funds to 
the United States to help satisfy REIT distribution requirements.
Our extensive use of TRSs, including for certain of our international operations, may cause us to fail to remain qualified for taxation 
as a REIT.
Our operations include an extensive use of TRSs. The net income of our TRSs is not required to be distributed to us, and income 
that is not distributed to us generally is not subject to the REIT income distribution requirement. However, there may be limitations 
on our ability to accumulate earnings in our TRSs and the accumulation or reinvestment of significant earnings in our TRSs could 
result in adverse tax treatment. In particular, if the accumulation of cash in our TRSs causes (i) the fair market value of our 
securities in our TRSs to exceed 20% of the fair market value of our assets or (ii) the fair market value of our securities in our TRSs 
and other nonqualifying assets to exceed 25% of the fair market value of our assets, then we will fail to remain qualified for taxation 
as a REIT. Further, a substantial portion of our operations are conducted overseas, and a material change in foreign currency rates 
could also affect the value of our foreign holdings in our TRSs, negatively impacting our ability to remain qualified for taxation as a 
REIT.
Even if we remain qualified for taxation as a REIT, some of our business activities are subject to corporate level income tax and 
foreign taxes, which will continue to reduce our cash flows, and we will have potential deferred and contingent tax liabilities.
Even if we remain qualified for taxation as a REIT, we may be subject to some federal, state, local and foreign taxes, including 
taxes on any undistributed income, and state, local or foreign income, franchise, property and transfer taxes. In addition, we could 
in certain circumstances be required to pay an excise or penalty tax, which could be significant in amount, in order to utilize one or 
more relief provisions under the Code to maintain our qualification for taxation as a REIT.
A portion of our business is conducted through TRSs because certain of our business activities could generate nonqualifying REIT 
income as currently structured and operated. The income of our domestic TRSs will continue to be subject to federal and state 
corporate income taxes. In addition, our international assets and operations will continue to be subject to taxation in the foreign 
jurisdictions where those assets are held or those operations are conducted. Any of these taxes would decrease our earnings and 
our available cash.
We will also be subject to a federal corporate level income tax at the highest regular corporate income tax rate on gain recognized 
from a sale of a REIT asset where our basis in the asset is determined by reference to the basis of the asset in the hands of a C 
corporation (such as an asset that we hold in one of our qualified REIT subsidiaries ("QRSs") following the liquidation or other 
conversion of a former TRS). This tax is generally applicable to any disposition of such an asset during the five-year period after 
the date we first owned the asset as a REIT asset, to the extent of the built-in-gain based on the fair market value of such asset on 
the date we first held the asset as a REIT asset. In addition, any depreciation recapture income that we recognize because of 
accounting method changes that we make in connection with our acquisition activities will be fully subject to this tax.
Complying with REIT requirements may limit our ability to hedge effectively and increase the cost of our hedging and may cause us 
to incur tax liabilities.
The REIT provisions of the Code limit our ability to hedge assets, liabilities, revenues and expenses. Generally, income from 
hedging transactions that we enter into to manage risk of interest rate changes with respect to borrowings made or to be made by 
us to acquire or carry real estate assets and income from certain currency hedging transactions related to our non-United States 
operations, as well as income from qualifying counteracting hedges, do not constitute "gross income" for purposes of the REIT 
gross income tests. To the extent that we enter into other types of hedging transactions, the income from those transactions is likely 
to be treated as nonqualifying income for purposes of the REIT gross income tests. As a result of these rules, we may need to limit 
our use of advantageous hedging techniques or implement those hedges through our TRSs. This could increase the cost of our 
hedging activities because our TRSs would be subject to tax on income or gains resulting from hedges entered into by them and 
may expose us to greater risks associated with changes in interest rates or exchange rates than we would otherwise want to bear. 
In addition, hedging losses in any of our TRSs generally will not provide any tax benefit, except for being carried forward for 
possible use against future income or gain in the TRSs.
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Distributions payable by REITs generally do not qualify for preferential tax rates, which could reduce the demand for and market 
price of our common stock.
Dividends payable by United States corporations to noncorporate stockholders, such as individuals, trusts and estates, are 
generally eligible for reduced United States federal income tax rates applicable to "qualified dividends". Distributions paid by REITs 
generally are not treated as "qualified dividends" under the Code, and the reduced rates applicable to such dividends do not 
generally apply. However, for tax years beginning before 2026, REIT dividends paid to noncorporate stockholders that meet 
specified holding period requirements are generally taxed at an effective tax rate lower than applicable ordinary income tax rates 
due to the availability of a deduction under the Code for specified forms of income from passthrough entities. More favorable rates 
will nevertheless continue to apply to regular corporate "qualified" dividends, which may cause some investors to perceive that an 
investment in a REIT is less attractive than an investment in a non-REIT entity that pays dividends, thereby reducing the demand 
and market price of our common stock.
The ownership and transfer restrictions contained in our certificate of incorporation may not protect our qualification for taxation as 
a REIT, could have unintended antitakeover effects and may prevent our stockholders from receiving a takeover premium.
In order for us to remain qualified for taxation as a REIT, no more than 50% of the value of outstanding shares of our capital stock 
may be owned, beneficially or constructively, by five or fewer individuals at any time during the last half of each taxable year. In 
addition, rents from "affiliated tenants" will not qualify as qualifying REIT income if we own 10% or more by vote or value of the 
customer, whether directly or after application of attribution rules under the Code. Subject to certain exceptions, our certificate of 
incorporation prohibits any stockholder from owning, beneficially or constructively, more than (i) 9.8% in value of the outstanding 
shares of all classes or series of our capital stock or (ii) 9.8% in value or number, whichever is more restrictive, of the outstanding 
shares of any class or series of our capital stock. We refer to these restrictions collectively as the "ownership limits" and we 
included them in our certificate of incorporation to facilitate our compliance with REIT tax rules. The constructive ownership rules 
under the Code are complex and may cause the outstanding stock owned by a group of related individuals or entities to be deemed 
to be constructively owned by one individual or entity. As a result, the acquisition of less than 9.8% of our outstanding common 
stock (or the outstanding shares of any class or series of our capital stock) by an individual or entity could cause that individual or 
entity or another individual or entity to own constructively in excess of the relevant ownership limits. Any attempt to own or transfer 
shares of our common stock or of any of our other capital stock in violation of these restrictions may result in the shares being 
automatically transferred to a charitable trust or may be void. Even though our certificate of incorporation contains the ownership 
limits, there can be no assurance that these provisions will be effective to prevent our qualification for taxation as a REIT from 
being jeopardized, including under the affiliated tenant rule. Furthermore, there can be no assurance that we will be able to monitor 
and enforce the ownership limits. If the restrictions in our certificate of incorporation are not effective and, as a result, we fail to 
satisfy the REIT tax rules described above, then, absent an applicable relief provision, we will fail to remain qualified for taxation as 
a REIT.
In addition, the ownership and transfer restrictions could delay, defer or prevent a transaction or a change in control that might 
involve a premium price for our stock or otherwise be in the best interest of our stockholders. As a result, the overall effect of the 
ownership and transfer restrictions may be to render more difficult or discourage any attempt to acquire us, even if such acquisition 
may be favorable to the interests of our stockholders. 
Legislative or other actions affecting REITs could have a negative effect on us or our stockholders.
At any time, the federal or state income tax laws governing REITs, the administrative interpretations of those laws, or local laws 
impacting our REIT structure for our international operations may be amended. Federal, state and local tax laws are constantly 
under review by persons involved in the legislative process, the United States Internal Revenue Service, the United States 
Department of the Treasury and state and local taxing authorities. Changes to the tax laws, regulations and administrative 
interpretations or local laws governing our international operations, which may have retroactive application, could adversely affect 
us. In addition, some of these changes could have a more significant impact on us as compared to other REITs due to the nature of 
our business and our substantial use of TRSs, particularly non-United States TRSs, or how we have structured our operations 
outside the United States to comply with REIT qualification requirements. We cannot predict with certainty whether, when, in what 
forms, or with what effective dates, the tax laws, regulations, administrative interpretations or local laws applicable to us may be 
changed or if such laws would impact our ability to remain qualified for taxation as a REIT or the costs of doing so. 
GENERAL RISK FACTORS
Our cash distributions are not guaranteed and may fluctuate.
As a REIT, we are generally required to distribute at least 90% of our REIT taxable income to our stockholders. Furthermore, we 
are committed to growing our dividends, and have stated this publicly.
Our board of directors, in its sole discretion, will determine, on a quarterly basis, the amount of cash to be distributed to our 
stockholders based on a number of factors including, but not limited to, our results of operations, cash flow and capital 
requirements, economic conditions, tax considerations, borrowing capacity and other factors, including debt covenant restrictions 
that may impose limitations on cash payments, future acquisitions and divestitures, any stock repurchase program and general 
market demand for our space and related services. Consequently, our distribution levels may fluctuate and we may not be able to 
meet our public commitments with respect to dividend growth.
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Our business could be adversely impacted if there are deficiencies in our disclosure controls and procedures or internal control 
over financial reporting.
The design and effectiveness of our disclosure controls and procedures and internal control over financial reporting may not 
prevent all errors, misstatements or misrepresentations. While management will continue to review the effectiveness of our 
disclosure controls and procedures and internal control over financial reporting, there can be no guarantee that our internal control 
over financial reporting will be effective in accomplishing all control objectives all of the time. Furthermore, our disclosure controls 
and procedures and internal control over financial reporting with respect to entities that we do not control or manage may be 
substantially more limited than those we maintain with respect to the subsidiaries that we have controlled or managed over the 
course of time. Deficiencies, including any material weakness, in our internal control over financial reporting which may occur in the 
future could result in misstatements of our results of operations, restatements of our financial statements, a decline in our stock 
price, or otherwise materially adversely affect our business, reputation, results of operations, financial condition or liquidity.
We face competition for customers.
We compete with multiple businesses in all geographic areas where we operate; our current or potential customers may choose to 
use those competitors instead of us. In addition, if we are successful in winning record storage customers from competitors, the 
process of moving their stored records into our facilities is often costly and time consuming. We also compete, in some of our 
business lines, with our current and potential customers’ internal storage and information management services capabilities and 
their cloud-based alternatives. These organizations may not begin or continue to use us for their future storage and information 
management service needs.
The performance of our businesses relies on our ability to attract, develop, and retain talented personnel, while controlling our labor 
costs.
We are highly dependent on skilled and qualified personnel to operate our businesses. Furthermore, our contracts with the United 
States Government require us to use personnel with security clearances, and we may not be successful or may experience delays 
in attracting, training or retaining qualified personnel with the requisite skills or security clearances. The failure to attract and retain 
qualified employees or to effectively control our labor costs could negatively affect our competitive position and operating results. 
Our ability to control labor costs and attract qualified personnel is subject to numerous external factors, including prevailing wages, 
labor shortages, the impact of legislation or regulations governing wages and hours, labor relations, immigration, healthcare and 
other benefits, other employment-related costs and the hiring practices of our competitors.
ITEM 1B. UNRESOLVED STAFF COMMENTS.
None.
ITEM 1C. CYBERSECURITY.
RISK MANAGEMENT AND STRATEGY 
We maintain a robust information security program that is designed to protect our information and the information of our customers. 
Our information security program is based on a recognized cybersecurity framework established by the National Institute of 
Standards and Technology ("NIST") and establishes controls to mitigate critical areas of cybersecurity risk. Our information security 
program has adopted all elements of the NIST cybersecurity framework, including the six functions of identify, protect, detect, 
respond, recover and govern, as well as each of the categories and control groups thereunder. This does not imply that we meet 
any particular technical standards, specifications, or requirements, but only that we use the NIST framework as a guide to ensure 
our information security program is designed to manage cybersecurity risks relevant to our business. Among other things, the 
cybersecurity controls in our information security program address information access rights, incident monitoring and response 
processes, information technology system configuration, network security, security architecture planning, mobile device security 
and compliance with information security policy requirements and protocols. These cybersecurity controls are designed to oversee, 
identify and mitigate risks from all cybersecurity threats, including those arising from our use of third-party service providers. Our 
cybersecurity controls are evaluated regularly by our internal information security team, and we engage a third party examiner to 
assess the maturity of our information security program against the NIST cybersecurity framework no less frequently than bi-
annually. Additionally, our information security program is assessed periodically by a federal regulator in the United States as part 
of its routine audit of the Company. In addition to our internal assessments, we also assess our third-party service providers on a 
regular basis using a risk-based approach that assigns a risk calculation to each such service provider. The results of our 
assessments are tracked and evaluated to ensure these third parties comply with our cybersecurity standards. We require all 
employees to undertake data protection and cybersecurity training and compliance programs annually.
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IRON MOUNTAIN 2024 FORM 10-K

Our reputation for providing secure information storage to customers is critical to the success of our business, and protecting 
against material cybersecurity risks is an integral part of maintaining that reputation. A successful cybersecurity breach could lead 
to theft or misuse of our or our customers’ proprietary or confidential information or our employees’ personal information and result 
in third-party claims against us, regulatory penalties and reputational harm. As part of our information security program, we also 
actively monitor emerging cyberattack patterns to develop custom detection capabilities and mitigation techniques to protect 
against material risk of cybersecurity threats. Upon encountering a cybersecurity incident, our information security team responds 
using our detailed cybersecurity incident response plan ("CSIRP"), which is based on industry best practices, relevant legal 
requirements and our contractual commitments. Among other things, the CSIRP sets forth the specific criteria used to assess a 
cybersecurity incident, mitigate risks of adverse consequences associated with any such incident, protocols to escalate the 
management of the incident and the process to inform our executive management team and any impacted functions of our 
business. All cybersecurity incidents are assessed to determine whether disclosure is required pursuant to any contractual or 
regulatory requirements and any material cybersecurity incident is also reported to our board of directors (our "Board"). 
To date, our information security program has been successful in protecting against risks from cybersecurity threats, and we have 
not had any cybersecurity incidents that have materially affected or are reasonably likely to materially affect our business strategy, 
results of operations or financial condition. Additional information about cybersecurity risks we face is discussed in Item 1A of Part I, 
“Risk Factors,” under the heading “Attacks on our internal IT systems could damage our reputation, cause us to lose revenues, and 
adversely affect our business, financial condition and results of operations”, which should be read in conjunction with the 
information above.
GOVERNANCE 
Our Board reviews and discusses significant risks with executive management, including cybersecurity risk, that affect us. Although 
our executive management team and our Board work together on risk matters, our Board has the ultimate oversight authority over 
all enterprise risks, including cybersecurity risk. Our Board reserves the right to, and periodically does, consult with third-party 
advisors and experts to assist our Board in understanding and anticipating future cybersecurity threats and trends. The risk and 
safety committee of our Board (the "RSC") is specifically tasked with reviewing and monitoring cybersecurity and information 
security risk, as well as the risk management strategies, systems and policies, and processes implemented, established and 
reported on by our executive management team. The RSC is also primarily responsible for assisting our Board with oversight of our 
enterprise risk management program. 
Our executive management team, with oversight from our Board, is responsible for our enterprise risk management process and 
the day-to-day supervision and mitigation of enterprise risks, including cybersecurity risk. Our enterprise risk management program 
includes our executive management team receiving regular reports from our operations personnel. As part of our enterprise risk 
program, our executive management team has established an enterprise risk committee (the "ERC"), which is chaired by our Chief 
Risk Officer and is otherwise composed of each of our other executive vice presidents. The ERC oversees our risk and compliance 
activities to ensure that management has appropriate policies and management plans in place for managing risks of the business, 
including cybersecurity risk, as well as reviewing and prioritizing significant risks and allocating resources for risk mitigation.
Our Chief Risk Officer provides reports at each meeting of the RSC on areas of potential risks to us, including cybersecurity risk, 
and our Chief Information Security Officer provides quarterly reports to the RSC on the key performance indicators of our 
information security program to facilitate the RSC’s oversight of the program through objective measurements, including metrics 
regarding software patching, IT asset management, cyber incident management and cybersecurity training. Reports by our Chief 
Information Security Officer also include detailed information on the activities of our cyber incident response team to allow for 
analysis of trends and the identification of any control gaps that require remediation.
We also maintain a business information security committee (the "ISC") with employee representation across geographies, 
business lines and business functions. The ISC includes a cross functional group of our employees with expertise and 
responsibilities in areas such as operations, digital product solutions, information technology, compliance, security, finance, privacy, 
internal audit and legal risk mitigation. The ISC is managed by our Chief Information Security Officer and meets regularly to receive 
updates on our cybersecurity posture, emerging risks and new cybersecurity capabilities. Members of the ISC act as points of 
contact during incident response activities to provide oversight and logistical support to the information security team.
The information security team is made primarily of full-time employees; however, we routinely engage consultants to provide 
supplemental labor and additional expertise in specific areas on an as-needed basis. Our information security team is organized 
based on industry best practices in alignment with NIST recommendations. All of the leaders in our information security team have 
over 10 years of cybersecurity experience and most of our information security staff maintain cybersecurity program certifications 
such as CMU Cybersecurity Executive Certification, ISACA Certifications (CISSP & CISM) and other relevant vendor certifications. 
Our information security team also regularly undergoes continuing education to ensure our implementation of best-in-class 
techniques. 
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21

ITEM 2. PROPERTIES. 
As of December 31, 2024, we conducted operations through 1,110 leased facilities and 236 owned facilities. Our facilities are 
divided among our reportable segments and Corporate and Other as follows: Global RIM Business (1,211), Global Data Center 
Business (33) and Corporate and Other (102). These facilities contain a total of approximately 98.1 million square feet of space. A 
breakdown of owned and leased facilities by country (and by state within the United States) is listed below:
North America
United States (Including Puerto Rico)
Alabama
 
3 
 
293,193 
 — 
 
— 
 
3 
 
293,193 
Arizona
 
7 
 
486,528 
 
6 
 
1,207,281 
 13 
 
1,693,809 
Arkansas
 
2 
 
63,604 
 — 
 
— 
 
2 
 
63,604 
California
 69 
 
7,092,102 
 
9 
 
942,356 
 78 
 
8,034,458 
Colorado
 
5 
 
274,461 
 
4 
 
484,490 
 
9 
 
758,951 
Connecticut
 
3 
 
208,253 
 
3 
 
527,666 
 
6 
 
735,919 
Delaware
 
3 
 
236,719 
 
2 
 
162,721 
 
5 
 
399,440 
District of Columbia
 
1 
 
1,670 
 — 
 
— 
 
1 
 
1,670 
Florida
 31 
 
2,777,184 
 
1 
 
119,374 
 32 
 
2,896,558 
Georgia
 13 
 
1,100,981 
 
2 
 
129,611 
 15 
 
1,230,592 
Idaho
 
1 
 
45,000 
 — 
 
— 
 
1 
 
45,000 
Illinois
 12 
 
1,237,895 
 
7 
 
1,309,975 
 19 
 
2,547,870 
Indiana
 
4 
 
290,116 
 — 
 
— 
 
4 
 
290,116 
Iowa
 
1 
 
100,000 
 
1 
 
14,200 
 
2 
 
114,200 
Kansas
 
3 
 
479,786 
 — 
 
— 
 
3 
 
479,786 
Kentucky
 — 
 
— 
 
4 
 
418,760 
 
4 
 
418,760 
Louisiana
 
4 
 
388,475 
 — 
 
— 
 
4 
 
388,475 
Maine
 — 
 
— 
 
1 
 
95,000 
 
1 
 
95,000 
Maryland
 20 
 
1,997,098 
 
1 
 
19,001 
 21 
 
2,016,099 
Massachusetts
 10 
 
566,633 
 
5 
 
862,350 
 15 
 
1,428,983 
Michigan
 11 
 
845,398 
 
1 
 
39,502 
 12 
 
884,900 
Minnesota
 10 
 
810,337 
 — 
 
— 
 10 
 
810,337 
Mississippi
 
2 
 
171,000 
 — 
 
— 
 
2 
 
171,000 
Missouri
 12 
 
1,335,639 
 
1 
 
25,120 
 13 
 
1,360,759 
Montana
 
3 
 
38,548 
 — 
 
— 
 
3 
 
38,548 
Nebraska
 
1 
 
34,560 
 
2 
 
266,733 
 
3 
 
301,293 
Nevada
 
9 
 
227,840 
 
1 
 
107,041 
 10 
 
334,881 
New Hampshire
 
1 
 
2,188 
 
1 
 
146,467 
 
2 
 
148,655 
New Jersey
 27 
 
3,375,178 
 
8 
 
2,476,635 
 35 
 
5,851,813 
New Mexico
 
2 
 
114,473 
 — 
 
— 
 
2 
 
114,473 
New York
 17 
 
1,003,191 
 10 
 
970,800 
 27 
 
1,973,991 
North Carolina
 21 
 
1,073,820 
 
1 
 
97,000 
 22 
 
1,170,820 
Ohio
 10 
 
1,138,809 
 
3 
 
242,087 
 13 
 
1,380,896 
Oklahoma
 
4 
 
196,044 
 — 
 
— 
 
4 
 
196,044 
Oregon
 12 
 
438,586 
 — 
 
— 
 12 
 
438,586 
Pennsylvania
 20 
 
2,590,759 
 
3 
 
2,062,761 
 23 
 
4,653,520 
Puerto Rico
 
4 
 
223,089 
 
1 
 
54,352 
 
5 
 
277,441 
Rhode Island
 
1 
 
94,968 
 — 
 
— 
 
1 
 
94,968 
South Carolina
 
4 
 
168,636 
 
2 
 
214,238 
 
6 
 
382,874 
Tennessee
 
5 
 
256,743 
 
4 
 
63,909 
 
9 
 
320,652 
Texas
 37 
 
2,582,518 
 19 
 
1,838,880 
 56 
 
4,421,398 
Utah
 
2 
 
78,148 
 
1 
 
90,553 
 
3 
 
168,701 
Vermont
 
1 
 
35,200 
 — 
 
— 
 
1 
 
35,200 
Virginia
 17 
 
1,306,303 
 
7 
 
1,165,472 
 24 
 
2,471,775 
Washington
 
9 
 
729,435 
 
4 
 
180,228 
 13 
 
909,663 
West Virginia
 
2 
 
105,502 
 — 
 
— 
 
2 
 
105,502 
Wisconsin
 
4 
 
325,520 
 — 
 
— 
 
4 
 
325,520 
Total United States
 440 
 
36,942,130 
 115 
 16,334,563 
 555 
 53,276,693 
Canada
 39 
 
2,769,235 
 14 
 
1,652,793 
 53 
 
4,422,028 
Total North America
 479 
 
 
39,711,365 
 
 129 
 
 17,987,356 
 
 608 
 57,698,721 
 
LEASED
OWNED
TOTAL
COUNTRY/STATE
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
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Part I
22
IRON MOUNTAIN 2024 FORM 10-K

International
Argentina
2
 
134,753 
4
 
298,864 
6
 
433,617 
Australia
46
 
2,913,577 
1
 
13,885 
47
 
2,927,462 
Austria
1
 
2,691 
1
 
58,771 
2
 
61,462 
Bahrain
2
 
33,659 
 — 
 
— 
2
 
33,659 
Belgium
3
 
190,740 
 — 
 
— 
3
 
190,740 
Brazil
42
 
2,816,571 
 
6 
 
291,280 
48
 
3,107,851 
Bulgaria
1
 
68,889 
 — 
 
— 
1
 
68,889 
Chile
2
 
3,692 
 18 
 
715,894 
20
 
719,586 
China Mainland (including China - Hong Kong S.A.R., 
China-Taiwan and China-Macau S.A.R.)
52
 
1,985,570 
 
1 
 
20,721 
53
 
2,006,291 
Colombia
17
 
771,479 
 — 
 
— 
17
 
771,479 
Croatia
1
 
26,049 
 
1 
 
36,447 
2
 
62,496 
Cyprus
2
 
51,118 
 
2 
 
46,246 
4
 
97,364 
Czech Republic
7
 
138,788 
 — 
 
— 
7
 
138,788 
Denmark
3
 
161,361 
 — 
 
— 
3
 
161,361 
Egypt
3
 
113,506 
 
1 
 
163,611 
4
 
277,117 
England
66
 
5,615,341 
 17 
 
552,986 
83
 
6,168,327 
Estonia
1
 
38,861 
 — 
 
— 
1
 
38,861 
Eswatini
3
 
6,997 
 — 
 
— 
3
 
6,997 
Finland
3
 
95,896 
 — 
 
— 
3
 
95,896 
France
26
 
2,150,804 
 12 
 
936,486 
38
 
3,087,290 
Germany
17
 
852,231 
 
3 
 
308,504 
20
 
1,160,735 
Greece
10
 
903,245 
 — 
 
— 
10
 
903,245 
Hungary
7
 
345,645 
 — 
 
— 
7
 
345,645 
India
81
 
4,038,809 
 
3 
 
226,432 
84
 
4,265,241 
Indonesia
18
 
527,746 
 
2 
 
58,965 
20
 
586,711 
Ireland
7
 
413,662 
 
5 
 
178,558 
12
 
592,220 
Jordan
1
 
107,639 
 — 
 
— 
1
 
107,639 
Kuwait
2
 
11,626 
 — 
 
— 
2
 
11,626 
Latvia
2
 
37,868 
 — 
 
— 
2
 
37,868 
Lesotho
1
 
3,617 
 — 
 
— 
1
 
3,617 
Lithuania
2
 
70,041 
 — 
 
— 
2
 
70,041 
Malaysia
10
 
495,755 
 — 
 
— 
10
 
495,755 
Mexico
8
 
430,868 
 
8 
 
585,885 
16
 
1,016,753 
Morocco
7
 
660,484 
 — 
 
— 
7
 
660,484 
The Netherlands
4
 
412,225 
 — 
 
— 
4
 
412,225 
New Zealand
6
 
388,888 
 — 
 
— 
6
 
388,888 
Northern Ireland
2
 
55,310 
 — 
 
— 
2
 
55,310 
Norway
4
 
155,323 
 — 
 
— 
4
 
155,323 
Oman
2
 
71,059 
 — 
 
— 
2
 
71,059 
Peru
2
 
47,265 
 10 
 
433,770 
12
 
481,035 
Philippines
13
 
427,312 
 — 
 
— 
13
 
427,312 
Poland
18
 
779,173 
 — 
 
— 
18
 
779,173 
Qatar
1
 
27,663 
 — 
 
— 
1
 
27,663 
Romania
7
 
484,773 
 — 
 
— 
7
 
484,773 
Saudi Arabia
7
 
400,687 
 — 
 
— 
7
 
400,687 
Scotland
2
 
86,386 
 
3 
 
324,751 
5
 
411,137 
Serbia
2
 
132,373 
 — 
 
— 
2
 
132,373 
Singapore
8
 
489,467 
 
2 
 
186,956 
10
 
676,423 
Slovakia
5
 
172,769 
 — 
 
— 
5
 
172,769 
South Africa
14
 
468,094 
 — 
 
— 
14
 
468,094 
South Korea
7
 
246,577 
 — 
 
— 
7
 
246,577 
Spain
19
 
511,793 
 
4 
 
204,527 
23
 
716,320 
Sweden
7
 
327,213 
 — 
 
— 
7
 
327,213 
Switzerland
11
 
287,410 
 — 
 
— 
11
 
287,410 
Thailand
6
 
375,940 
 
2 
 
105,487 
8
 
481,427 
LEASED
OWNED
TOTAL
COUNTRY/STATE
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
Table of Contents
                                                                                                                                                                                                                                  Part I
IRON MOUNTAIN 2024 FORM 10-K
23

International (continued)
Turkey
 
10 
 
694,437 
 — 
 
— 
 
10 
 
694,437 
Ukraine
 
9 
 
185,648 
 — 
 
— 
 
9 
 
185,648 
United Arab Emirates
 
7 
 
695,118 
 
1 
 
434,442 
 
8 
 
1,129,560 
Vietnam
 
2 
 
54,829 
 — 
 
— 
 
2 
 
54,829 
Total International
 
631 
 34,197,310 
 107 
 
 
6,183,468 
 
738 
 40,380,778 
Total
 1,110 
 73,908,675 
 236 
 24,170,824 
 1,346 
 98,079,499 
LEASED
OWNED
TOTAL
COUNTRY/STATE
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
NUMBER
SQUARE FEET
The leased facilities typically have initial lease terms of five to 10 years with one or more renewal options. In addition, some of the 
leases contain either a purchase option or a right of first refusal upon the sale of the property. We believe that the space available 
in our facilities is adequate to meet our current needs, although future growth may require that we lease or purchase additional real 
property.
Our total building utilization and total racking utilization as of December 31, 2024 in Records Management and Data Management 
are as follows:
RECORDS MANAGEMENT(1)
DATA MANAGEMENT
BUILDING
UTILIZATION
RACKING
UTILIZATION
BUILDING
UTILIZATION
RACKING
UTILIZATION
77%
83%
37%
57%
(1) Total building utilization and total racking utilization for Records Management includes the utilization for Global Digital Solutions and Consumer Storage.
See Note 2.j. to Notes to Consolidated Financial Statements included in this Annual Report for information regarding our minimum 
annual lease commitments as a lessee.
See Schedule III—Schedule of Real Estate and Accumulated Depreciation in this Annual Report for information regarding the cost, 
accumulated depreciation and encumbrances associated with our owned real estate.
The following table sets forth a summary of the lease expirations for leases in place related to our Global Data Center Business, for 
which we are the lessor, as of December 31, 2024. The information set forth in the table assumes that tenants will exercise any 
early termination rights that do not have significant penalties and will not exercise any renewal options.
YEAR
NUMBER OF 
LEASES EXPIRING
TOTAL MEGAWATTS
EXPIRING
PERCENTAGE
OF TOTAL 
MEGAWATTS
EXPIRING
ANNUALIZED
TOTAL CONTRACT
RENT EXPIRING 
(IN THOUSANDS)
PERCENTAGE OF
TOTAL CONTRACT 
VALUE ANNUALIZED
RENT
2025
 
947 
 
32.8 
 6.1 %
$ 
87,435 
 10.8 %
2026
 
372 
 
28.3 
 5.3 %
 
71,103 
 8.8 %
2027
 
189 
 
14.8 
 2.8 %
 
43,542 
 5.4 %
2028
 
111 
 
38.5 
 7.2 %
 
69,900 
 8.6 %
2029
 
66 
 
50.5 
 9.5 %
 
52,612 
 6.5 %
2030
 
27 
 
54.5 
 10.2 %
 
67,744 
 8.4 %
2031
 
5 
 
2.5 
 0.5 %
 
4,913 
 0.6 %
Thereafter
 
28 
 
311.8 
 58.4 %
 
412,800 
 50.9 %
Total
 
1,745 
 
533.7 
 100.0 %
$ 
810,049 
 100.0 %
Table of Contents
Part I
24
IRON MOUNTAIN 2024 FORM 10-K

ITEM 3. LEGAL PROCEEDINGS.
We are involved in litigation from time to time in the ordinary course of business. A portion of the defense and/or settlement costs 
associated with such litigation is covered by various commercial liability insurance policies purchased by us and, in limited cases, 
indemnification from third parties. In the opinion of management, no material legal proceedings are pending to which we, or any of 
our properties, are subject. 
ITEM 4. MINE SAFETY DISCLOSURES.
None.
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                                                                                                                                                                                                                                  Part I
IRON MOUNTAIN 2024 FORM 10-K
25


PART II
ITEM 5. MARKET FOR REGISTRANT'S COMMON 
EQUITY, RELATED STOCKHOLDER MATTERS AND 
ISSUER PURCHASES OF EQUITY SECURITIES.
Our common stock is traded on the NYSE under the symbol "IRM". The closing price of our common stock on the NYSE on 
February 7, 2025 was $106.06. As of February 7, 2025, there were 3,444 holders of record of our common stock. See Note 9 to 
Notes to Consolidated Financial Statements included in this Annual Report for additional information on dividends declared on our 
common stock. 
UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF 
PROCEEDS
We did not sell any unregistered equity securities during the three months ended December 31, 2024, nor did we repurchase any 
shares of our common stock during the three months ended December 31, 2024.
ITEM 6. [RESERVED.]
ITEM 7. MANAGEMENT'S DISCUSSION AND 
ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS.
The following discussion should be read in conjunction with the Consolidated Financial Statements and Notes thereto and the other 
financial and operating information included elsewhere in this Annual Report.
This discussion contains "forward-looking statements" as that term is defined in the Private Securities Litigation Reform Act of 1995 
and in other securities laws. See "Cautionary Note Regarding Forward-Looking Statements" on page iii of this Annual Report and 
"Item 1A. Risk Factors" beginning on page 9 of this Annual Report.
Table of Contents
IRON MOUNTAIN 2024 FORM 10-K
27

OVERVIEW
PROJECT MATTERHORN
In September 2022, we announced Project Matterhorn, a global program designed to accelerate the growth of our business. 
Project Matterhorn investments focus on transforming our operating model to a global operating model. Project Matterhorn 
focuses on the formation of a solution-based sales approach that is designed to allow us to optimize our shared services and 
best practices to better serve our customers' needs. We are investing to accelerate growth and to capture a greater share of the 
large, global addressable markets in which we operate. We have incurred approximately $378.5 million in Restructuring and other 
transformation costs from the inception of Project Matterhorn through December 31, 2024. We expect to incur approximately 
$150.0 million in costs related to Project Matterhorn during the year ending December 31, 2025, at which point the program is 
expected to be completed. Costs are comprised of (1) restructuring costs, which include (i) site consolidation and other related 
exit costs, (ii) employee severance costs and (iii) certain professional fees associated with these activities, and (2) other 
transformation costs, which include professional fees such as project management costs and costs for third party consultants 
who are assisting in the enablement of our growth initiatives. The following chart presents (in thousands) total Restructuring and 
other transformation costs related to Project Matterhorn from the inception of Project Matterhorn through December 31, 2024 and 
for the years ended December 31, 2024 and 2023:
     
From the Inception of Project
Matterhorn through
December 31, 2024
$378,507
     
For the Year ended
December 31, 2024
$161,359
     
For the Year ended
December 31, 2023
$175,215
GENERAL
RESULTS OF OPERATIONS - KEY TRENDS 
•
Our organic storage rental revenue growth is primarily driven by revenue management in our Global RIM Business segment, 
where we expect volume to be relatively stable in the near term, as well as by growth in our Global Data Center Business 
segment, primarily driven by lease commencements.
•
Our organic service revenue growth is primarily due to increases in our service activity. We expect organic service revenue 
growth in 2025 to benefit from our new and existing Global Digital Solutions offerings and ALM, as well as our traditional 
services.
•
We expect continued total revenue and Adjusted earnings before interest, taxes, depreciation and amortization ("EBITDA") 
growth in 2025 as a result of our focus on new product and service offerings, innovation, customer solutions and market 
expansion in line with our Project Matterhorn objectives.
Our revenues consist of storage rental revenues and service revenues and are reflected net of sales and value-added taxes. 
Storage rental revenues, which are considered a key driver of financial performance for the storage and information management 
services industry, consist primarily of recurring periodic rental charges related to the storage of materials or data (generally on a per 
unit basis) that are typically retained by customers for many years and of revenues associated with our data center operations. 
Service revenues include charges for related service activities, the most significant of which include: (1) the handling of records, 
including the addition of new records, temporary removal of records from storage, refiling of removed records, customer termination 
and permanent withdrawal fees, project revenues and courier operations, consisting primarily of the pickup and delivery of records 
upon customer request; (2) secure shredding of sensitive documents and the subsequent sale of shredded paper for recycling, the 
price of which can fluctuate from period to period; (3) the decommissioning, data erasure, processing and disposition, and recycling 
or sale of IT hardware and component assets; (4) digital solutions, including the scanning, imaging and document conversion 
services of active and inactive records, consulting services and the sale of software as a service; and (5) data center services, 
including set up, monitoring and support of our customers' assets which are protected in our data center facilities, and special 
project services, including data center fitout.
Cost of sales (excluding depreciation and amortization) consists primarily of labor, including wages and benefits for field personnel, 
facility occupancy costs (including rent and utilities), data center pass-through power costs, transportation expenses (including 
vehicle leases and fuel), other product cost of sales and other equipment costs and supplies. Of these, labor and facility occupancy 
costs are the most significant. Selling, general and administrative expenses consist primarily of wages and benefits for 
management, administrative, IT, sales, account management and marketing personnel, as well as expenses related to 
communications, travel, professional fees, bad debts, training, office equipment and supplies. 
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Part II
28
IRON MOUNTAIN 2024 FORM 10-K

Cost of sales (excluding depreciation and amortization) and Selling, general and administrative expenses for the year ended 
December 31, 2024 consists of the following:
COST OF SALES
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES
Trends in facility occupancy costs are impacted by:
•
the total number of facilities we occupy;
•
the mix of properties we own versus properties we lease;
•
fluctuations in per square foot occupancy costs;
•
the levels of utilization of these properties; and
•
data center power costs.
Trends in total wages and benefits in dollars and as a percentage of total revenue are influenced by:
•
changes in headcount and compensation levels;
•
achievement of incentive compensation targets;
•
workforce productivity; and
•
variability in costs associated with medical insurance and workers’ compensation.
Our depreciation and amortization charges result primarily from depreciation related to storage systems, which include buildings, 
building and leasehold improvements, data center infrastructure, racking structures and computer systems hardware and software. 
Amortization relates primarily to customer and supplier relationship intangible assets, Contract Costs (as defined below in Critical 
Accounting Estimates) and data center lease-based intangible assets. Both depreciation and amortization are impacted by the 
timing of acquisitions.
Our consolidated revenues and expenses are subject to the net effect of foreign currency translation related to our operations 
outside the United States. It is difficult to predict the future fluctuations of foreign currency exchange rates and how those 
fluctuations will impact our Consolidated Statements of Operations. As a result of the relative size of our international operations, 
these fluctuations may be material on individual balances. Our revenues and expenses from our international operations are 
generally denominated in the local currency of the country in which they are derived or incurred. Therefore, the impact of currency 
fluctuations on our operating income and operating margin is partially mitigated. In order to provide a framework for assessing how 
our underlying businesses performed excluding the effect of foreign currency fluctuations, we compare the percentage change in 
the results from one period to another period in this report using constant currency presentation. The constant currency growth 
rates are calculated by translating the 2023 results at the 2024 average exchange rates. Constant currency growth rates are a non-
GAAP measure.
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Part II
IRON MOUNTAIN 2024 FORM 10-K
29

The following table is a comparison of underlying average exchange rates of the foreign currencies that had the most significant 
impact on our United States dollar-reported revenues and expenses:
 
PERCENTAGE OF 
UNITED STATES DOLLAR-
REPORTED REVENUE FOR THE
YEAR ENDED DECEMBER 31,
AVERAGE EXCHANGE RATES
FOR THE YEAR ENDED
DECEMBER 31,
PERCENTAGE
(WEAKENING) / 
STRENGTHENING OF
FOREIGN CURRENCY
 
2024
2023
2024
2023
Australian dollar
 2.6 %
 2.6 %
$ 
0.660 
$ 
0.664 
 (0.6) %
British pound sterling
 6.9 %
 7.2 %
$ 
1.278 
$ 
1.243 
 2.8 %
Canadian dollar
 4.9 %
 5.1 %
$ 
0.730 
$ 
0.741 
 (1.5) %
Euro
 6.8 %
 6.6 %
$ 
1.082 
$ 
1.081 
 0.1 %
The percentage of United States dollar-reported revenues for all other foreign currencies was 13.6% and 14.5% for the years 
ended December 31, 2024 and 2023, respectively.
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Part II
30
IRON MOUNTAIN 2024 FORM 10-K

NON-GAAP MEASURES
ADJUSTED EBITDA
We define Adjusted EBITDA as net income (loss) before interest expense, net, provision (benefit) for income taxes, depreciation 
and amortization (inclusive of our share of Adjusted EBITDA from our unconsolidated joint ventures), and excluding certain items 
we do not believe to be indicative of our core operating results, specifically:
EXCLUDED
•
Acquisition and Integration Costs (as defined below)
•
Restructuring and other transformation
•
Loss (gain) on disposal/write-down of property, plant and 
equipment, net (including real estate)
•
Other expense (income), net
•
Stock-based compensation expense
•
Intangible impairments
Adjusted EBITDA Margin is calculated by dividing Adjusted EBITDA by total revenues. We also show Adjusted EBITDA and 
Adjusted EBITDA Margin for each of our reportable segments under "Results of Operations – Segment Analysis" below.
Adjusted EBITDA excludes both interest expense, net and the provision (benefit) for income taxes. These expenses are associated 
with our capitalization and tax structures, which we do not consider when evaluating the operating profitability of our core 
operations. Adjusted EBITDA does not include depreciation and amortization expenses, in order to eliminate the impact of capital 
investments, which we evaluate by comparing capital expenditures to incremental revenue generated and as a percentage of total 
revenues. Adjusted EBITDA and Adjusted EBITDA Margin should be considered in addition to, but not as a substitute for, other 
measures of financial performance reported in accordance with accounting principles generally accepted in the United States of 
America ("GAAP"), such as operating income, net income (loss) or cash flows from operating activities. 
RECONCILIATION OF NET INCOME (LOSS) TO ADJUSTED EBITDA (IN THOUSANDS):
 
YEAR ENDED DECEMBER 31,
 
2024
2023
Net Income (Loss)
$ 
183,666 
$ 
187,263 
Add/(Deduct):
Interest expense, net
 
721,559 
 
585,932 
Provision (benefit) for income taxes
 
60,872 
 
39,943 
Depreciation and amortization
 
900,905 
 
776,159 
Acquisition and Integration Costs(1)
 
35,842 
 
25,875 
Restructuring and other transformation
 
161,359 
 
175,215 
Loss (gain) on disposal/write-down of property, plant and equipment, net (including real estate)
 
6,196 
 
(12,825) 
Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint 
ventures(2)
 
39,159 
 
98,891 
Stock-based compensation expense
 
118,138 
 
73,799 
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures
 
8,684 
 
11,425 
Adjusted EBITDA
$ 
2,236,380 
$ 
1,961,677 
(1) Represent operating expenditures directly associated with the closing and integration activities of our business acquisitions that have closed, or are highly probable 
of closing, and include (i) advisory, legal and professional fees to complete business acquisitions and (ii) costs to integrate acquired businesses into our existing 
operations, including move, severance and system integration costs (collectively, "Acquisition and Integration Costs").
(2) Includes foreign currency transaction (gains) losses, net, debt extinguishment expense and other, net. See Note 2.v. to Notes to Consolidated Financial Statements 
included in this Annual Report for additional information regarding the components of Other expense (income), net.
Table of Contents
Part II
IRON MOUNTAIN 2024 FORM 10-K
31

ADJUSTED EPS
We define Adjusted EPS as reported earnings per share fully diluted from net income (loss) attributable to Iron Mountain 
Incorporated (inclusive of our share of adjusted losses (gains) from our unconsolidated joint ventures) and excluding certain items, 
specifically:
EXCLUDED
•
Acquisition and Integration Costs
•
Restructuring and other transformation
•
Loss (gain) on disposal/write-down of property, plant and 
equipment, net (including real estate)
•
Other expense (income), net
•
Stock-based compensation expense
•
Non-cash amortization related to derivative instruments
•
Tax impact of reconciling items and discrete tax items
•
Amortization related to the write-off of certain customer 
relationship intangible assets
We do not believe these excluded items to be indicative of our ongoing operating results, and they are not considered when we are 
forecasting our future results. We believe Adjusted EPS is of value to our current and potential investors when comparing our 
results from past, present and future periods.
RECONCILIATION OF REPORTED EPS—FULLY DILUTED FROM NET INCOME (LOSS) ATTRIBUTABLE TO 
IRON MOUNTAIN INCORPORATED TO ADJUSTED EPS—FULLY DILUTED FROM NET INCOME (LOSS) 
ATTRIBUTABLE TO IRON MOUNTAIN INCORPORATED:
 
YEAR ENDED 
DECEMBER 31,
 
2024
2023
Reported EPS—Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated
$ 
0.61 
$ 
0.63 
Add/(Deduct): 
Acquisition and Integration Costs
 
0.12 
 
0.09 
Restructuring and other transformation
 
0.54 
 
0.60 
Loss (gain) on disposal/write-down of property, plant and equipment, net (including real estate)
 
0.02 
 
(0.04) 
        Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures
 
0.13 
 
0.34 
Stock-based compensation expense
 
0.40 
 
0.25 
Non-cash amortization related to derivative instruments(1)
 
0.06 
 
0.07 
Tax impact of reconciling items and discrete tax items(2)
 
(0.12)  
(0.12) 
     Income (Loss) Attributable to Noncontrolling Interests
 
0.01 
 
0.01 
Adjusted EPS—Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated(3)
$ 
1.77 
$ 
1.82 
(1) Relates to the amortization of the excluded component of our cross-currency swap agreements, which is recognized on a straight-line basis as a component of 
Interest expense, net in our Consolidated Statements of Operations.
(2) The differences between our effective tax rates and our structural tax rate (or adjusted effective tax rates) for the years ended December 31, 2024 and 2023 are 
primarily due to (i) the reconciling items above, which impact our reported net income (loss) before provision (benefit) for income taxes but have an insignificant 
impact on our reported provision (benefit) for income taxes and (ii) other discrete tax items. Our structural tax rate for purposes of the calculation of Adjusted EPS for 
the years ended December 31, 2024 and 2023 was 15.6% and 12.3%, respectively.
(3) Columns may not foot due to rounding.
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32
IRON MOUNTAIN 2024 FORM 10-K

FFO (NAREIT) AND FFO (NORMALIZED)
Funds from operations ("FFO") is defined by the National Association of Real Estate Investment Trusts as net income (loss) 
excluding depreciation on real estate assets, losses and gains on sale of real estate, net of tax, and amortization of data center 
leased-based intangibles ("FFO (Nareit)"). We calculate our FFO measures, including FFO (Nareit), adjusting for our share of 
reconciling items from our unconsolidated joint ventures. FFO (Nareit) does not give effect to real estate depreciation because 
these amounts are computed, under GAAP, to allocate the cost of a property over its useful life. Because values for well-
maintained real estate assets have historically increased or decreased based upon prevailing market conditions, we believe that 
FFO (Nareit) provides investors with a clearer view of our operating performance. Our most directly comparable GAAP measure to 
FFO (Nareit) is net income (loss).
We modify FFO (Nareit), as is common among REITs seeking to provide financial measures that most meaningfully reflect their 
particular business ("FFO (Normalized)"). Our definition of FFO (Normalized) excludes certain items included in FFO (Nareit) that 
we believe are not indicative of our core operating results, specifically:
EXCLUDED
•
Acquisition and Integration Costs
•
Restructuring and other transformation
•
Loss (gain) on disposal/write-down of property, plant and 
equipment, net (excluding real estate)
•
Other expense (income), net
•
Stock-based compensation expense
•
Non-cash amortization related to derivative instruments
•
Real estate financing lease depreciation
•
Tax impact of reconciling items and discrete tax items
•
Intangible impairments
•
(Income) loss from discontinued operations, net of tax
RECONCILIATION OF NET INCOME (LOSS) TO FFO (NAREIT) AND FFO (NORMALIZED) (IN THOUSANDS):
YEAR ENDED DECEMBER 31,
2024
2023
Net Income (Loss)
$ 
183,666 
$ 
187,263 
Add/(Deduct):
Real estate depreciation(1)
 
367,362 
 
322,045 
(Gain) loss on sale of real estate, net of tax(2)
 
(6,698)  
(16,656) 
Data center lease-based intangible assets amortization(3)
 
22,304 
 
22,322 
Our share of FFO (Nareit) reconciling items from our unconsolidated joint ventures
 
4,830 
 
2,226 
FFO (Nareit)
 
571,464 
 
517,200 
Add/(Deduct):
Acquisition and Integration Costs
 
35,842 
 
25,875 
Restructuring and other transformation
 
161,359 
 
175,215 
Loss (gain) on disposal/write-down of property, plant and equipment, net (excluding real estate)
 
14,025 
 
4,307 
Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint 
ventures
 
39,159 
 
98,891 
Stock-based compensation expense
 
118,138 
 
73,799 
Non-cash amortization related to derivative instruments
 
16,705 
 
21,097 
Real estate financing lease depreciation
 
13,135 
 
12,019 
Tax impact of reconciling items and discrete tax items(4)
 
(37,248)  
(35,307) 
Our share of FFO (Normalized) reconciling items from our unconsolidated joint ventures
 
(17)  
(374) 
FFO (Normalized)
$ 
932,562 
$ 
892,722 
(1) Includes depreciation expense related to owned real estate assets (land improvements, buildings, building and leasehold improvements, data center infrastructure 
and racking structures), excluding depreciation related to real estate financing leases.
(2) Tax expense associated with the gain on sale of real estate for the years ended December 31, 2024 and 2023 was approximately $1.1 million and $0.5 million, 
respectively.
(3) Includes amortization expense for Data Center In-Place Leases and Data Center Tenant Relationships as defined in Note 2.m. to Notes to Consolidated Financial 
Statements included in this Annual Report.
(4) Represents the tax impact of (i) the reconciling items above, which impact our reported net income (loss) before provision (benefit) for income taxes but has an 
insignificant impact on our reported provision (benefit) for income taxes and (ii) other discrete tax items. Discrete tax items resulted in a (benefit) provision for income 
taxes of $(6.2) million and $(18.1) million for the years ended December 31, 2024 and 2023, respectively.
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IRON MOUNTAIN 2024 FORM 10-K
33

CRITICAL ACCOUNTING ESTIMATES
Our discussion and analysis of our financial condition and results of operations are based upon our Consolidated Financial 
Statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to 
make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and 
related disclosure of contingent assets and liabilities at the date of the financial statements and for the period then ended. On an 
ongoing basis, we evaluate the estimates used. We base our estimates on historical experience, actuarial estimates, current 
conditions and various other assumptions that we believe to be reasonable under the circumstances. These estimates form the 
basis for making judgments about the carrying values of assets and liabilities and are not readily apparent from other sources. 
Actual results may differ from these estimates. The following should be read in conjunction with Note 2 to Notes to Consolidated 
Financial Statements included in this Annual Report, which provides a summary of our significant accounting policies. Our critical 
accounting estimates include the following, which are listed in no particular order: 
REVENUE RECOGNITION 
Revenue is recognized when or as control of promised goods or services is transferred to the customer, in an amount that reflects 
the consideration we expect to be entitled to in exchange for those goods or services. See Note 2.s. to Notes to Consolidated 
Financial Statements included in this Annual Report for additional details on our revenue recognition policies. Revenue for all our 
lines of business, with the exception of storage revenues in our Global Data Center Business (which is subject to Accounting 
Standards Codification ("ASC") Topic 842, Leases), is recognized in accordance with ASC 606, Revenue from Contracts with 
Customers ("ASC 606"), the application of which requires that we make significant judgments related to performance obligations 
and the transfer of control to the customer.
We have determined that the majority of our contracts contain series performance obligations which qualify to be recognized under 
a practical expedient available in ASC 606 known as the "right to invoice". This determination allows variable consideration in such 
contracts to be allocated to and recognized in the period to which the consideration relates, which is typically the period in which it 
is billed, rather than requiring estimation of variable consideration at the inception of the contract.
Certain costs to fulfill or obtain customer contracts and certain initial direct costs of obtaining data center leases, including the costs 
associated with the initial movement of customer records into physical storage and certain commission expenses, are collectively 
referred to as "Contract Costs". Contract Costs are capitalized and amortized as a component of depreciation and amortization in 
our Consolidated Statements of Operations, generally over a three year term, which we have determined is consistent with the 
transfer of the underlying performance obligations to which the assets relate. Different determinations on term length would result 
in differences in the amount and timing of amortization expense recognized.
ACCOUNTING FOR ACQUISITIONS
Part of our growth strategy has been to acquire businesses. The purchase price of each acquisition is determined after due 
diligence of the target business, market research, strategic planning and the forecasting of expected future results and synergies. 
Estimated future results and expected synergies are subject to revisions as we integrate each acquisition and attempt to leverage 
resources. 
Accounting for acquisitions of a business has resulted in the capitalization of the cost in excess of the estimated fair value of the 
net assets acquired in each of these acquisitions as goodwill. We estimate the fair values of the assets acquired in each acquisition 
as of the date of acquisition and these estimates are subject to adjustment based on the final assessments of the fair value of 
intangible assets (primarily customer and supplier relationship and data center lease-based intangible assets), property, plant and 
equipment (primarily buildings, building and leasehold improvements, data center infrastructure and racking structures), operating 
leases, contingencies and income taxes (primarily deferred income taxes). See Note 3 to Notes to Consolidated Financial 
Statements included in this Annual Report for a description of recent acquisitions. 
Determining the fair values of the net assets acquired requires management’s judgment and often involves the use of assumptions 
with respect to future cash inflows and outflows, discount rates and market data, among other items. As it relates to our data center 
acquisitions, the fair values of the net assets acquired requires management’s judgment and often involves the use of assumptions 
with respect to (i) certain economic costs (as described more fully in Note 2.m. to Notes to Consolidated Financial Statements 
included in this Annual Report) avoided by acquiring a data center operation with active tenants that would have otherwise been 
incurred if the data center operation was purchased vacant, (ii) market rental rates and (iii) expectations of lease renewals and 
extensions. Due to the inherent uncertainty of future events, actual values of net assets acquired could be different from our 
estimated fair values and could have a material impact on our financial statements.
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IRON MOUNTAIN 2024 FORM 10-K

Of the net assets acquired in our acquisitions, the fair value of owned buildings, including data center infrastructure and building 
improvements, customer and supplier relationship and data center lease-based intangible assets, racking structures and operating 
leases are generally the most common and most significant. For significant acquisitions or acquisitions involving new markets or 
new products, we generally use third parties to assist us in estimating the fair value of owned buildings, including data center 
infrastructure and building improvements, customer and supplier relationship and lease-based intangible assets and market rental 
rates for acquired operating leases. For acquisitions that are not significant or do not involve new markets or new products, we 
generally use third parties to assist us in estimating the fair value of owned buildings, including data center infrastructure and 
building improvements, and market rental rates for acquired operating leases. When not using third party appraisals of the fair 
value of acquired net assets, the fair value of acquired customer and supplier relationship intangible assets, above and below 
market in-place operating leases, and racking structures is determined internally. When estimating fair values internally, we use 
discounted cash flow models to determine the fair value of customer and supplier relationship intangible assets, which requires a 
significant amount of judgment by management, including estimating expected lives of the relationships, expected future cash flows 
and discount rates. The fair value of above and below market in-place operating leases is determined internally using a discounted 
cash flow model, utilizing the difference in cash flows between the contractual lease payments over the remaining lease term and 
estimated market rental rates on comparable assets at the time of the acquisition. The fair value of acquired racking structures is 
determined internally by taking current estimated replacement cost at the date of acquisition for the quantity of racking structures 
acquired, discounted to take into account the quality (e.g. age, material and type) of the racking structures. We determine the fair 
value of tangible data center assets using an estimated replacement cost at the date of acquisition, then discounting for age, 
economic and functional obsolescence.
The fair value of the deferred purchase obligation associated with the ITRenew Transaction (as defined in Note 3 to Notes to 
Consolidated Financial Statements included in this Annual Report) was determined utilizing a Monte-Carlo simulation model and 
takes into account our forecasted projections as it relates to the underlying performance of the business. The Monte-Carlo 
simulation model incorporates assumptions as to expected gross profits over the applicable achievement period, including 
adjustments for the volatility of timing and amount of the associated revenue and costs, as well as discount rates that account for 
the risk of the underlying arrangement and overall market risks.
The fair value of the deferred purchase obligation associated with the Regency Transaction (as defined in Note 3 to Notes to 
Consolidated Financial Statements included in this Annual Report) was determined utilizing a Monte-Carlo simulation model and 
takes into account our forecasted projections as it relates to the underlying performance of the business. The Monte-Carlo 
simulation model incorporates assumptions as to expected revenue over the achievement period, including adjustments for 
volatility and timing, as well as discount rates that account for the risk of the arrangement and overall market risks. 
Our estimates of fair value are based upon assumptions believed to be reasonable at that time but which are inherently uncertain 
and unpredictable. Assumptions may be incomplete or inaccurate, and unanticipated events and circumstances may occur, which 
may affect the accuracy of such assumptions. Total supplier relationship intangible assets acquired in our 2024 acquisitions was 
approximately $131.5 million.
IMPAIRMENT OF TANGIBLE AND INTANGIBLE ASSETS 
ASSETS SUBJECT TO DEPRECIATION OR AMORTIZATION 
We review long-lived assets, including finite-lived intangible assets, for impairment whenever events or changes in circumstances 
indicate the carrying amount of such assets may not be recoverable. Examples of events or circumstances that may be indicative 
of impairment include, but are not limited to:
•
A significant decrease in the market price of an asset;
•
A significant change in the extent or manner in which a long-lived asset is being used or in its physical condition;
•
A significant adverse change in legal factors or in the business climate that could affect the value of the asset;
•
An accumulation of costs significantly greater than the amount originally expected for the acquisition or construction of an asset;
•
A current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast 
that demonstrates continuing losses associated with the use of a long-lived asset; and
•
A current expectation that, more likely than not, an asset will be sold or otherwise disposed of significantly before the end of its 
previously estimated useful life.
If events indicate the carrying value of such assets may not be recoverable, recoverability of these assets is determined by 
comparing the sum of the forecasted undiscounted net cash flows of the operation to which the assets relate to their carrying 
amount. The operations are generally distinguished by the business segment and geographic region in which they operate. If it is 
determined that we are unable to recover the carrying amount of the assets, the long-lived assets are written down, on a pro rata 
basis, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the 
assets.
We did not record impairment charges for any of our long-lived assets or finite-lived intangibles during the years ended 
December 31, 2024 and 2023.
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35

GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS NOT SUBJECT TO 
AMORTIZATION
Goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment, or more frequently if 
impairment indicators arise. Other than goodwill, we currently have no intangible assets that have indefinite lives and which are not 
amortized. See Note 2.l. to Notes to Consolidated Financial Statements included in this Annual Report for additional details on our 
goodwill and other indefinite-lived intangible assets policies.
We have selected October 1 as our annual goodwill impairment review date. We have performed our annual goodwill impairment 
review as of October 1, 2024 and 2023. We concluded that as of October 1, 2024 and 2023, goodwill was not impaired.
Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2024 were as follows:
•
North American Records and Information Management reporting 
unit ("North America RIM")
•
Europe Records and Information Management reporting unit 
("Europe RIM")
•
Latin America Records and Information Management reporting 
unit ("Latin America RIM")
•
Asia, Australia and New Zealand Records and Information 
Management reporting unit ("APAC RIM")
•
Media and Archive Services (formerly Entertainment Services)
•
Global Data Center
•
Fine Arts
•
ALM
See Note 2.l. to Notes to Consolidated Financial Statements included in this Annual Report for a description of our reporting units.
Based on our goodwill impairment analysis as of October 1, 2024, all of our reporting units had estimated fair values exceeding 
their carrying values by greater than 35%. The ALM reporting unit represented approximately $749.6 million, or 14.7%, of our 
consolidated goodwill balance at December 31, 2024, and its fair value is most sensitive to changes in our assumptions. The 
following is a summary of the ALM reporting unit including the goodwill balance (in thousands), the percentage by which the fair 
value of the reporting unit exceeded its carrying value and certain key assumptions used by us in determining the fair value of the 
reporting unit as of October 1, 2024:
REPORTING UNIT
GOODWILL
BALANCE AT
OCTOBER 1,
2024
PERCENTAGE BY
WHICH THE FAIR VALUE
OF THE REPORTING
UNIT EXCEEDED THE
REPORTING UNIT
CARRYING VALUE AS OF
OCTOBER 1, 2024
KEY ASSUMPTIONS IN THE FAIR VALUE OF REPORTING UNIT
MEASUREMENT AS OF OCTOBER 1, 2024
DISCOUNT
RATE
AVERAGE ANNUAL
ADJUSTED EBITDA
MARGIN USED IN
DISCOUNTED
CASH FLOW
AVERAGE
ANNUAL CAPITAL
EXPENDITURES AS
PERCENTAGE OF
REVENUE(1)
TERMINAL
GROWTH
RATE(2)
ALM
$748,000
57.4%
15.5%
15.4%
1.4%
3.5%
(1)
For purposes of our goodwill impairment analysis, the term "capital expenditures" includes both growth investment and recurring capital expenditures.
(2)
Terminal growth rates are applied after year 10 of our discounted cash flow analysis.
The fair values of our reporting units are generally determined using a combined approach based on the present value of future 
cash flows (the "Discounted Cash Flow Model") and market multiples (the "Market Approach"). There are inherent uncertainties and 
judgments involved when determining the fair value of the reporting units for purposes of our annual goodwill impairment testing. 
The following includes supplemental information to the table above for the ALM reporting unit where the estimated fair value 
exceeded its carrying value by approximately 57.4% as of October 1, 2024. The fair value of our ALM reporting unit was 
determined using a Discounted Cash Flow Model approach. We do not use a Market Approach when determining the fair value of 
our ALM reporting unit given a lack of directly comparable publicly traded guideline companies to ALM. The success of these 
businesses and the achievement of certain key assumptions developed by management and used in the Discounted Cash Flow 
Model are contingent upon various factors including, but not limited to, (i) achieving growth from existing customers, (ii) sales to 
new customers, (iii) increased market penetration and (iv) market pricing trends of IT hardware and component assets.
ALM
Our ALM business provides hyperscale and corporate IT infrastructure managers with services and solutions that enable the 
decommissioning, data erasure, processing and disposition, and recycling or sale of IT hardware and component assets. ALM 
services are enabled by: (i) secure logistics, chain of custody and complete asset traceability practices; (ii) environmentally-
responsible asset processing and recycling; and (iii) data sanitization and asset refurbishment services that enable value recovery 
through asset remarketing. The assumptions we used in determining fair value reflect the ongoing and anticipated expansion of 
these services, the maintenance and further development of the supplier relationships required to expand this business and meet 
customer demand and decommissioning schedules of our supplier's IT hardware and component assets, as well as demand for 
such assets at that time. The assumptions used also reflect market pricing for IT hardware and component assets that is consistent 
with pricing we observed in the current year.
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IRON MOUNTAIN 2024 FORM 10-K

KEY ASSUMPTIONS
Key factors that could reasonably be expected to have a negative impact on the estimated fair value of these reporting units and 
potentially result in impairment charges include, but are not limited to: (i) a deterioration in general economic conditions, (ii) 
significant adverse changes in regulatory factors or in the business climate, (iii) adverse actions or assessment by regulators and 
(iv) changes in market trends due to the evolution of technology, all of which could result in adverse changes to the key 
assumptions used in valuing the reporting units. The inability to meet the assumptions used in the Discounted Cash Flow Model 
and Market Approach for each of the reporting units, or future adverse market conditions not currently known, could lead to a fair 
value that is less than the carrying value in any one of our reporting units. 
The Discounted Cash Flow Model incorporates significant assumptions including future revenue growth rates, operating margins, 
discount rates and capital expenditures. The Market Approach requires us to make assumptions related to EBITDA multiples. 
Changes in economic and operating conditions impacting these assumptions or changes in multiples could result in goodwill 
impairments in future periods. In conjunction with our annual goodwill impairment reviews, we reconcile the sum of the valuations 
of all of our reporting units to our market capitalization as of such dates.
Although we believe we have sufficient historical and projected information available to us to test for goodwill impairment, it is 
possible that actual results could differ from the estimates used in our impairment tests. Of the key assumptions that impact the 
goodwill impairment test, the expected future cash flows and discount rate are among the most sensitive and are considered to be 
critical assumptions, as changes to these estimates could have an effect on the estimated fair value of each of our reporting units. 
We have assessed the sensitivity of these assumptions on each of our reporting units as of October 1, 2024. 
We noted that, based on the estimated fair value of all of our reporting units determined as of October 1, 2024:
•
a hypothetical decrease of 10% in the expected annual future cash flows of these reporting units, with all other assumptions 
unchanged, would have decreased the estimated fair value of our reporting units as of October 1, 2024 by a range of 
approximately 9.9% to 12.5% but would not, however, have resulted in the carrying value of any of our reporting units 
exceeding their estimated fair value; and
•
a hypothetical increase of 100 basis points in the discount rate, with all other assumptions unchanged, would have decreased 
the estimated fair value of our reporting units as of October 1, 2024 by a range of approximately 3.8% to 14.0% but would not, 
however, have resulted in the carrying value of any of our reporting units exceeding their estimated fair value.
At December 31, 2024, no factors were identified that would alter the conclusions of our October 1, 2024 goodwill impairment 
analysis. In making this assessment, we considered a number of factors including operating results, business plans, anticipated 
future cash flows, transactions and marketplace data. There are inherent uncertainties related to these factors and our judgment in 
applying them to the analysis of goodwill impairment.
INCOME TAXES
Accounting for income taxes requires the recognition of deferred tax assets and liabilities for the expected future tax consequences 
of temporary differences between the tax and financial reporting bases of assets and liabilities and for loss and credit 
carryforwards. We measure deferred tax assets and liabilities using enacted tax rates expected to be applied to taxable income in 
the years in which those temporary differences and carryforwards are expected to be recovered or settled. The effect on deferred 
tax assets and liabilities as a result of a change in tax rates is recognized in income in the period that the change is enacted. 
Valuation allowances are provided when recovery of deferred tax assets does not meet the more likely than not standard as 
defined in GAAP. Valuation allowances would be reversed as a reduction to the provision for income taxes if related deferred tax 
assets are deemed realizable based on changes in facts and circumstances relevant to the recoverability of the asset.
At December 31, 2024, we have federal net operating loss carryforwards of $95.5 million and disallowed interest expense 
carryforwards of $152.2 million, both of which can be carried forward indefinitely, and of which $89.2 million and $68.7 million, 
respectively, are expected to be realized to reduce future federal taxable income. We have assets for foreign net operating losses 
of $146.6 million and foreign disallowed interest expense carryforwards of $17.7 million, with various expiration dates (and in some 
cases no expiration date), subject to valuation allowances of approximately 72.0% and 46.5%, respectively. If actual results differ 
unfavorably from certain of our estimates used, we may not be able to realize all or part of our net deferred income tax assets and 
additional valuation allowances may be required. Although we believe our estimates are reasonable, no assurance can be given 
that our estimates reflected in the tax provisions and accruals will equal our actual results. These differences could have a material 
impact on our income tax provision and operating results in the period in which such determination is made.
The evaluation of an uncertain tax position is a two-step process. The first step is a recognition process whereby we determine 
whether it is more likely than not that a tax position will be sustained upon examination, including resolution of any related appeals 
or litigation processes, based on the technical merits of the position. The second step is a measurement process whereby a tax 
position that meets the more likely than not recognition threshold is calculated to determine the amount of benefit to recognize in 
the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being 
realized upon ultimate settlement.
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37

We are subject to income taxes in the United States and numerous foreign jurisdictions. We are subject to examination by various 
tax authorities in jurisdictions in which we have business operations or a taxable presence. We regularly assess the likelihood of 
additional assessments by tax authorities and provide for these matters as appropriate. As of December 31, 2024 and 2023, we 
had approximately $25.9 million and $23.6 million, respectively, of reserves related to uncertain tax positions. The reversal of these 
reserves will be recorded as a reduction of our income tax provision if sustained. Although we believe our tax estimates are 
appropriate, the final determination of tax audits and any related litigation could result in changes in our estimates.
We provide for foreign withholding taxes on the undistributed earnings of our foreign TRSs because it is not our intention to reinvest 
the undistributed earnings of our foreign TRSs indefinitely outside the United States. As a REIT, future repatriation of incremental 
undistributed earnings of our foreign subsidiaries will not be subject to federal or state income tax.
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IRON MOUNTAIN 2024 FORM 10-K

RESULTS OF OPERATIONS
The following information summarizes our results of operations for the year ended December 31, 2024 compared to the year ended 
December 31, 2023. For a discussion of our results for the year ended December 31, 2023 compared to the year ended 
December 31, 2022, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" 
included in our Annual Report on Form 10-K filed with the SEC on February 22, 2024.
COMPARISON OF YEAR ENDED DECEMBER 31, 2024 TO YEAR ENDED DECEMBER 31, 2023
(IN THOUSANDS):
 
YEAR ENDED DECEMBER 31,
DOLLAR
CHANGE
PERCENTAGE
CHANGE
 
2024
2023
Revenues
$ 
6,149,909 
$ 
5,480,289 
$ 
669,620 
 12.2 %
Operating Expenses
 
5,140,390 
 
4,558,511 
 
581,879 
 12.8 %
Operating Income
 
1,009,519 
 
921,778 
 
87,741 
 9.5 %
Other Expenses, Net
 
825,853 
 
734,515 
 
91,338 
 12.4 %
Net Income (Loss)
 
183,666 
 
187,263 
 
(3,597) 
 (1.9) %
Net Income (Loss) Attributable to Noncontrolling Interests
 
3,510 
 
3,029 
 
481 
 15.9 %
Net Income (Loss) Attributable to Iron Mountain Incorporated
$ 
180,156 
$ 
184,234 
$ 
(4,078) 
 (2.2) %
Adjusted EBITDA(1)
$ 
2,236,380 
$ 
1,961,677 
$ 
274,703 
 14.0 %
Adjusted EBITDA Margin(1)
 36.4 %
 35.8 %
 
(1)
See "Non-GAAP Measures—Adjusted EBITDA" in this Annual Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, reconciliation of Net 
Income (Loss) to Adjusted EBITDA and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and 
potential investors.
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39

REVENUES
Total revenues consist of the following (in thousands):
 
YEAR ENDED DECEMBER 31,
 
PERCENTAGE CHANGE
 
2024
2023
DOLLAR
CHANGE
ACTUAL
CONSTANT
CURRENCY(1)
IMPACT OF 
ACQUISITIONS
ORGANIC
GROWTH(2)
Storage Rental
$ 
3,682,259 
$ 
3,370,645 
$ 
311,614 
 9.2 %
 9.7 %
 0.8 %
 8.9 %
Service
 
2,467,650 
 
2,109,644 
 
358,006 
 17.0 %
 17.3 %
 8.3 %
 9.0 %
Total Revenues
$ 
6,149,909 
$ 
5,480,289 
$ 
669,620 
 12.2 %
 12.6 %
 3.6 %
 9.0 %
(1)
Constant currency growth rate, which is a non-GAAP measure, is calculated by translating the 2023 results at the 2024 average exchange rates.
(2)
Our organic revenue growth rate, which is a non-GAAP measure, represents the year-over-year growth rate of our revenues excluding the impact of business 
acquisitions, divestitures and foreign currency exchange rate fluctuations. Our organic revenue growth rate includes the impact of acquisitions of customer 
relationships.
TOTAL REVENUES
For the year ended December 31, 2024, the increase in reported revenue was primarily driven by reported storage rental revenue 
growth and reported service revenue growth. 
STORAGE RENTAL REVENUE AND SERVICE REVENUE
Primary factors influencing the change in reported storage rental revenue and reported service revenue for the year ended 
December 31, 2024 compared to the year ended December 31, 2023 include the following: 
STORAGE RENTAL REVENUE
•
organic storage rental revenue growth driven by increased volume in faster growing 
markets and our Global Data Center Business segment and revenue management.
SERVICE REVENUE
•
organic service revenue growth driven by increased service activity levels in our Global 
RIM Business and organic service revenue growth in our ALM business as a result of 
increased volume and improved component pricing; and
•
an increase of $137.0 million due to our acquisition of Regency Technologies.
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40
IRON MOUNTAIN 2024 FORM 10-K

OPERATING EXPENSES
COST OF SALES
Cost of sales (excluding depreciation and amortization) consists of the following expenses (in thousands):
 
YEAR ENDED 
DECEMBER 31,
PERCENTAGE 
CHANGE
% OF
CONSOLIDATED
REVENUES
PERCENTAGE
CHANGE
(FAVORABLE)/
UNFAVORABLE
 
2024
2023
DOLLAR 
CHANGE
ACTUAL
CONSTANT
CURRENCY
2024
2023
Labor
$ 1,052,568 
$ 891,351 
$ 
161,217 
 18.1 %
 18.6 %
 17.1 %
 16.3 %
 0.8 %
Facilities
 1,114,316 
 1,028,765 
 
85,551 
 8.3 %
 8.5 %
 18.1 %
 18.8 %
 (0.7) %
Transportation
 
179,166 
 
158,737 
 
20,429 
 12.9 %
 13.2 %
 2.9 %
 2.9 %
 — %
Product Cost of Sales and Other  
350,499 
 
278,947 
 
71,552 
 25.7 %
 26.1 %
 5.7 %
 5.1 %
 0.6 %
Total Cost of sales
$ 2,696,549 
$ 2,357,800 
$ 
338,749 
 14.4 %
 14.7 %
 43.8 %
 43.0 %
 0.8 %
Primary factors influencing the change in reported Cost of sales for the year ended December 31, 2024 compared to the year 
ended December 31, 2023 include the following: 
•
an increase in labor costs driven by an increase in service activity, primarily within our Global RIM Business, and the impact of 
recent acquisitions;
•
an increase in facilities expenses driven by increases in rent expense, utilities and real estate taxes;
•
an increase in transportation expenses in our ALM business primarily driven by our acquisition of Regency Technologies; and
•
an increase in product cost of sales in our ALM business as a result of higher product volumes and our acquisition of Regency 
Technologies.
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IRON MOUNTAIN 2024 FORM 10-K
41

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES
Selling, general and administrative expenses consists of the following expenses (in thousands):
 
YEAR ENDED 
DECEMBER 31,
 
PERCENTAGE 
CHANGE
% OF
CONSOLIDATED
REVENUES
PERCENTAGE
CHANGE
(FAVORABLE)/
UNFAVORABLE
 
DOLLAR
CHANGE
 
2024
2023
ACTUAL
CONSTANT
CURRENCY
2024
2023
General, Administrative and Other
$ 977,345 
$ 873,195 
$ 104,150 
 11.9 %
 12.3 %
 15.9 %
 15.9 %
 — %
Sales, Marketing and Account 
Management
 
362,194 
 
363,092 
 
(898) 
 (0.2) %
 — %
 5.9 %
 6.6 %
 (0.7) %
Total Selling, general and 
administrative expenses
$ 1,339,539 $ 1,236,287 
$ 103,252 
 8.4 %
 8.7 %
 21.8 %
 22.6 %
 (0.8) %
Primary factors influencing the change in reported Selling, general and administrative expenses for the year ended December 31, 
2024 compared to the year ended December 31, 2023 include the following: 
•
an increase in general, administrative and other expenses, primarily driven by higher compensation expense, recent 
acquisitions, professional fees and IT costs; and 
•
a decrease in sales, marketing and account management expenses, driven by lower compensation expense, primarily offset by 
increased professional fees and marketing costs.
DEPRECIATION AND AMORTIZATION
Our depreciation and amortization charges result primarily from depreciation related to storage systems, which include buildings, 
building and leasehold improvements, data center infrastructure, racking structures and computer systems hardware and software. 
Amortization relates primarily to customer and supplier relationship intangible assets, Contract Costs and data center lease-based 
intangible assets. Both depreciation and amortization are impacted by the timing of acquisitions.
Depreciation expense increased $103.4 million, or 19.7%, on a reported dollar basis for the year ended December 31, 2024 
compared to the year ended December 31, 2023. See Note 2.i. to Notes to Consolidated Financial Statements included in this 
Annual Report for additional information regarding the useful lives over which our property, plant and equipment is depreciated. 
Amortization expense increased $21.3 million, or 8.5%, on a reported dollar basis for the year ended December 31, 2024 
compared to the year ended December 31, 2023.
ACQUISITION AND INTEGRATION COSTS
Acquisition and Integration Costs for the years ended December 31, 2024 and 2023 were approximately $35.8 million and 
$25.9 million, respectively. 
RESTRUCTURING AND OTHER TRANSFORMATION
Restructuring and other transformation costs for the years ended December 31, 2024 and 2023 were approximately $161.4 million 
and $175.2 million, respectively, and related to operating expenses associated with the implementation of Project Matterhorn.
LOSS (GAIN) ON DISPOSAL/WRITE-DOWN OF PROPERTY, PLANT AND
EQUIPMENT, NET
Loss (gain) on disposal/write-down of property, plant and equipment, net for the years ended December 31, 2024 and 2023 was 
approximately $6.2 million and $(12.8) million, respectively.
OTHER EXPENSES, NET
INTEREST EXPENSE, NET
Interest expense, net increased $135.6 million to $721.6 million in the year ended December 31, 2024 from $585.9 million in the 
year ended December 31, 2023. The increase is primarily due to higher average debt outstanding during the year ended 
December 31, 2024 compared to the prior year period. Our weighted average interest rate, inclusive of the fees associated with our 
outstanding letters of credit, was 5.7% and 5.6% at December 31, 2024 and 2023, respectively. See Note 7 to Notes to 
Consolidated Financial Statements included in this Annual Report for additional information regarding our indebtedness.
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IRON MOUNTAIN 2024 FORM 10-K

OTHER EXPENSE (INCOME), NET 
Other expense (income), net consists of the following (in thousands):
 
YEAR ENDED DECEMBER 31,
DOLLAR
CHANGE
DESCRIPTION
2024
2023
Foreign currency transaction (gains) losses, net(1)
$ 
(39,064) $ 
36,799 
$ 
(75,863) 
Debt extinguishment expense
 
5,678 
 
— 
 
5,678 
Other, net(2)
 
76,808 
 
71,841 
 
4,967 
Other expense (income), net
$ 
43,422 
$ 
108,640 
$ 
(65,218) 
(1) We recorded net foreign currency transaction gains of $39.1 million in the year ended December 31, 2024, based on period-end exchange rates. These gains 
resulted primarily from the impact of changes in the exchange rate of the British pound sterling and the Euro against the United States dollar compared to 
December 31, 2023 on our intercompany balances with and between certain of our subsidiaries.
(2) Other, net for the year ended December 31, 2024 primarily consists of (i) a loss of approximately $41.0 million due to the change in value of our deferred purchase 
obligations and other deferred payments, (ii) approximately $29.2 million in charges associated with the agreement to purchase the remaining interest in the Web 
Werks JV (as defined and discussed in Note 3 to Notes to Consolidated Financial Statements included in this Annual Report) and (iii) losses on our equity method 
investments.
PROVISION (BENEFIT) FOR INCOME TAXES
We have been organized and have operated as a REIT beginning with our taxable year ended December 31, 2014.
Our effective tax rates for the years ended December 31, 2024 and 2023 were 24.9% and 17.6%, respectively. Our effective tax 
rate is subject to variability in the future due to, among other items: (i) changes in the mix of income between our QRSs and our 
TRSs, as well as among the jurisdictions in which we operate, (ii) tax law changes, (iii) volatility in foreign exchange gains and 
losses, (iv) the timing of the establishment and reversal of tax reserves, (v) our ability to utilize net operating losses and interest 
expenses that we generate and (vi) the taxability or deductibility of significant transactions.
The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate were:
YEAR ENDED DECEMBER 31,
2024
2023
The lack of tax benefits recognized for the ordinary losses and 
disallowed interest expenses of certain entities of $37.0 million and 
differences in the tax rates to which our foreign earnings are subject of 
$13.3 million, partially offset by the benefits derived from the dividends 
paid deduction of $33.9 million. In addition, we recorded gains and 
losses in Other expense (income), net during the period, for which there 
was no tax impact.
The benefits derived from the dividends paid deduction of $39.3 million 
and the differences in the tax rates to which our foreign earnings are 
subject of $6.9 million. In addition, there were gains and losses 
recorded in Other expense (income), net for which there was no tax 
impact.
As a REIT, we are entitled to a deduction for dividends paid, resulting in a substantial reduction of federal income tax expense. As a 
REIT, substantially all of our income tax expense will be incurred based on the earnings generated by our foreign subsidiaries and 
our domestic TRSs.
We are subject to income taxes in the United States and numerous foreign jurisdictions. We are subject to examination by various 
tax authorities in jurisdictions in which we have business operations or a taxable presence. We regularly assess the likelihood of 
additional assessments by tax authorities and provide for these matters as appropriate. Although we believe our tax estimates are 
appropriate, the final determination of tax audits and any related litigation could result in changes in our estimates.
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IRON MOUNTAIN 2024 FORM 10-K
43

NET INCOME (LOSS) AND ADJUSTED EBITDA
The following table reflects the effect of the foregoing factors on our net income (loss) and Adjusted EBITDA (in thousands):
YEAR ENDED DECEMBER 31,
DOLLAR
CHANGE
PERCENTAGE
CHANGE
2024
2023
Net Income (Loss)
$ 
183,666 
$ 
187,263 
$ 
(3,597) 
 (1.9) %
Net Income (Loss) as a percentage of Revenue
 3.0 %
 3.4 %
Adjusted EBITDA
$ 
2,236,380 
$ 
1,961,677 
$ 
274,703 
 14.0 %
Adjusted EBITDA Margin
 36.4 %
 35.8 %
Adjusted EBITDA Margin for the year ended December 31, 
2024 increased 60 basis points from the prior year driven by 
favorable overhead management, offset by changes in our 
revenue mix.
↑ INCREASED BY $274.7 MILLION
OR 14.0%
Adjusted EBITDA
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IRON MOUNTAIN 2024 FORM 10-K

SEGMENT ANALYSIS 
See the discussion of Business Segments under Item I and Note 11 to Notes to Consolidated Financial Statements, both included 
in this Annual Report, for a description of our reportable segments.
GLOBAL RIM BUSINESS (IN THOUSANDS)
 
YEAR ENDED DECEMBER 31,
PERCENTAGE CHANGE
 
2024
2023
DOLLAR
CHANGE
ACTUAL
CONSTANT
CURRENCY
IMPACT OF
ACQUISITIONS
ORGANIC
GROWTH
Storage Rental
$ 3,009,094 
$ 2,834,352 
$ 
174,742 
 6.2 %
 6.7 %
 0.4 % 
 6.3 %
Service
 
1,970,344 
 
1,827,424 
 
142,920 
 7.8 %
 8.3 %
 0.4 % 
 7.9 %
Segment Revenue
$ 4,979,438 
$ 4,661,776 
$ 
317,662 
 6.8 %
 7.3 %
 0.4 %
 6.9 %
Segment Adjusted EBITDA
$ 2,223,117 
$ 2,027,037 
$ 
196,080 
 
 
 
Segment Adjusted EBITDA Margin
 44.6 %
 43.5 %
 
 
 
SEGMENT ANALYSIS: GLOBAL RIM BUSINESS (IN MILLIONS)
Storage Rental 
Revenue
Service 
Revenue
Segment 
Revenue
Segment Adjusted 
EBITDA
$2,834.4
$1,827.4
$4,661.8
$3,009.1
$1,970.3
$4,979.4
2023
2024
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
$2,027.0
$2,223.1
43.5%
44.6%
Segment Adjusted 
EBITDA Margin
0%
20%
40%
60%
Primary factors influencing the change in revenue and Adjusted EBITDA Margin in our Global RIM Business segment for the year 
ended December 31, 2024 compared to the year ended December 31, 2023 include the following:
•
organic storage rental revenue growth driven by revenue management;
•
organic service revenue growth primarily driven by increases in our traditional service activity levels and growth in our Global 
Digital Solutions business; and
•
a 110 basis point increase in Adjusted EBITDA Margin primarily driven by ongoing cost containment measures and revenue 
management.
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IRON MOUNTAIN 2024 FORM 10-K
45

GLOBAL DATA CENTER BUSINESS (IN THOUSANDS)
 
YEAR ENDED DECEMBER 31,
PERCENTAGE CHANGE
IMPACT OF 
ACQUISITIONS
ORGANIC
GROWTH
 
2024
2023
DOLLAR
CHANGE
ACTUAL
CONSTANT
CURRENCY
Storage Rental
$ 
606,294 
$ 
474,066 
$ 132,228 
 27.9 %
 27.6 %
 2.8 %
 24.8 %
Service
 
13,734 
 
20,960 
 
(7,226) 
 (34.5) %
 (34.6) %  
 — %
 (34.6) %
Segment Revenue
$ 
620,028 
$ 
495,026 
$ 125,002 
 25.3 %
 25.0 %
 2.8 %
 22.2 %
Segment Adjusted EBITDA
$ 
282,513 
$ 
215,945 
$ 
66,568 
Segment Adjusted EBITDA Margin
 45.6 %
 43.6 %
 
 
 
SEGMENT ANALYSIS: GLOBAL DATA CENTER BUSINESS (IN MILLIONS) 
Storage Rental 
Revenue
Service 
Revenue
Segment 
Revenue
Segment Adjusted 
EBITDA
$474.1
$21.0
$495.1
$606.3
$13.7
$620.0
2023
2024
0
50
100
150
200
250
300
350
400
450
500
550
600
650
$215.9
$282.5
43.6%
45.6%
Segment Adjusted 
EBITDA Margin
0%
25%
50%
Primary factors influencing the change in revenue and Adjusted EBITDA Margin in our Global Data Center Business segment for 
the year ended December 31, 2024 compared to the year ended December 31, 2023 include the following:
•
organic storage rental revenue growth from leases that commenced during 2024 and in prior periods, improved pricing and 
higher pass-through power costs, partially offset by churn of 700 basis points;
•
an increase in Adjusted EBITDA primarily driven by organic storage rental revenue growth; and
•
a 200 basis point increase in Adjusted EBITDA Margin reflecting recent lease commencements, improved pricing and cost 
containment, partially offset by increased usage of pass-through power.
 
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IRON MOUNTAIN 2024 FORM 10-K

CORPORATE AND OTHER (IN THOUSANDS)
 
YEAR ENDED DECEMBER 31,
PERCENTAGE CHANGE
IMPACT OF
ACQUISITIONS
ORGANIC
GROWTH
 
2024
2023
DOLLAR
CHANGE
ACTUAL
CONSTANT
CURRENCY
Storage Rental
$ 
66,871 
$ 
62,227 
$ 
4,644 
 7.5 %
 7.0 %
 1.7 %
 5.3 %
Service
 
483,572 
 
261,260 
 222,312 
 85.1 %
 84.7 %
 64.5 %
 20.2 %
Revenue
$ 
550,443 
$ 
323,487 
$ 226,956 
 70.2 %
 69.7 %
 52.4 %
 17.3 %
Adjusted EBITDA
$ 
(269,250) 
$ 
(281,305) 
$ 12,055 
 
 
 
Primary factors influencing the change in revenue and Adjusted EBITDA in Corporate and Other for the year ended December 31, 
2024 compared to the year ended December 31, 2023 include the following:
•
an increase in service revenue of $137.0 million due to our acquisition of Regency Technologies;
•
organic service revenue growth in our ALM business reflecting increased volume and improved component pricing; and
•
an increase in Adjusted EBITDA driven by service revenue improvement in our ALM business, including from the Regency 
Technologies acquisition, partially offset by higher compensation expense, professional fees and IT costs.
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IRON MOUNTAIN 2024 FORM 10-K
47

LIQUIDITY AND CAPITAL RESOURCES
GENERAL
We expect to meet our short-term and long-term cash flow requirements through cash generated from operations, cash on hand, 
borrowings under our Credit Agreement (as defined below), as well as other potential financings (such as the issuance of debt). 
Our cash flow requirements, both in the near and long term, include, but are not limited to, capital expenditures, the repayment of 
outstanding debt, shareholder dividends, potential business acquisitions and normal business operation needs.
PROJECT MATTERHORN
As disclosed above, in September 2022, we announced Project Matterhorn. We have incurred approximately $378.5 million in 
Restructuring and other transformation costs from the inception of Project Matterhorn through December 31, 2024. We expect to 
incur approximately $150.0 million in costs related to Project Matterhorn during the year ending December 31, 2025, at which point 
the program is expected to be completed. During the years ended December 31, 2024 and 2023, we incurred approximately 
$161.4 million and $175.2 million, respectively, of Restructuring and other transformation costs related to Project Matterhorn, which 
are comprised of (1) restructuring costs, which include (i) site consolidation and other related exit costs, (ii) employee severance 
costs and (iii) certain professional fees associated with these activities, and (2) other transformation costs, which include 
professional fees such as project management costs and costs for third party consultants who are assisting in the enablement of 
our growth initiatives.
CASH FLOWS
The following is a summary of our cash balances and cash flows (in thousands) as of and for the years ended December 31,
2024
2023
Cash Flows from Operating Activities
$ 
1,196,708 
$ 
1,113,567 
Cash Flows from Investing Activities
 
(2,136,761)  
(1,444,356) 
Cash Flows from Financing Activities
 
876,745 
 
425,666 
Cash and Cash Equivalents, End of Year
 
155,716 
 
222,789 
A. CASH FLOWS FROM OPERATING ACTIVITIES
For the year ended December 31, 2024, net cash flows provided by operating activities increased by $83.1 million compared to the 
prior year period primarily due to an increase in net income (excluding non-cash charges) of $114.9 million, partially offset by a 
decrease in cash from working capital of $31.8 million.
B. CASH FLOWS FROM INVESTING ACTIVITIES
Our significant investing activities during the year ended December 31, 2024 included:
•
Cash paid for capital expenditures of $1,791.6 million. Additional details of our capital spending are included in the "Capital 
Expenditures" section below.
•
Cash paid for acquisitions, net of cash acquired, of $178.4 million, primarily funded by borrowings under the Revolving Credit 
Facility (as defined below).
C. CASH FLOWS FROM FINANCING ACTIVITIES
Our significant financing activities during the year ended December 31, 2024 included:
•
Net proceeds of approximately $1,188.0 million associated with the issuance of the 61/4% Notes (as defined below).
•
Net proceeds of approximately $492.0 million, primarily associated with borrowings under our data center credit facilities, which 
were used to partially finance the construction of our data centers.
•
Payment of dividends in the amount of $789.5 million on our common stock.
•
Equity contributions from noncontrolling interests of $230.8 million.
•
Payments of deferred purchase obligations of $158.8 million.
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IRON MOUNTAIN 2024 FORM 10-K

CAPITAL EXPENDITURES 
We present two categories of capital expenditures: (1) Growth Investment Capital Expenditures and (2) Recurring Capital 
Expenditures with the following sub-categories: (i) Data Center; (ii) Real Estate; (iii) Innovation and Other (for Growth Investment 
Capital Expenditures only); and (iv) Non-Real Estate (for Recurring Capital Expenditures only). 
GROWTH INVESTMENT CAPITAL EXPENDITURES:
•
Data Center: Expenditures primarily related to investments in the construction of data center facilities (including the acquisition 
of land), as well as investments to drive revenue growth, expand capacity or achieve operational or cost efficiencies.
•
Real Estate: Expenditures primarily related to investments in land, buildings, building and leasehold improvements and racking 
structures to grow our revenues, extend the useful life of an asset or achieve operational or cost efficiencies.
•
Innovation and Other: Discretionary capital expenditures for new products and services as well as computer hardware and 
software to drive revenue growth, expand capacity or to achieve operational cost efficiencies in businesses other than our data 
center business. Integration costs of acquisitions are also included.
RECURRING CAPITAL EXPENDITURES:
•
Data Center: Expenditures related to the replacement of equivalent components and overall maintenance of existing data 
center assets.
•
Real Estate: Expenditures primarily related to the replacement of components of real estate assets such as buildings, building 
and leasehold improvements and racking structures.
•
Non-Real Estate: Expenditures primarily related to the replacement of containers and shred bins, warehouse equipment, 
fixtures, computer hardware, or third-party or internally-developed software assets that support the maintenance of existing 
revenues or avoidance of an increase in costs.
The following table presents our capital spend for 2024 and 2023 organized by the type of the spending as described above.
NATURE OF CAPITAL SPEND (IN THOUSANDS)
2024
2023
Growth Investment Capital Expenditures:
 
 
Data Center
$ 1,422,118 
$ 
964,198 
Real Estate
 
204,248 
 
201,036 
Innovation and Other
 
131,195 
 
81,135 
Total Growth Investment Capital Expenditures
 
1,757,561 
 
1,246,369 
Recurring Capital Expenditures:
 
Data Center
 
19,728 
 
17,198 
Real Estate
 
56,781 
 
58,465 
Non-Real Estate
 
66,558 
 
64,743 
Total Recurring Capital Expenditures
 
143,067 
 
140,406 
Total Capital Spend (on accrual basis)
 
1,900,628 
 
1,386,775 
Net (decrease) increase in prepaid capital expenditures
 
(1,627)  
14,174 
Net (increase) decrease in accrued capital expenditures
 
(107,437)  
(61,726) 
Total Capital Spend (on cash basis)
$ 1,791,564 
$ 
1,339,223 
Excluding capital expenditures associated with potential future acquisitions, we expect total capital expenditures of approximately 
$1,950.0 million for the year ending December 31, 2025. Of this, we expect capital expenditures for growth investment of 
approximately $1,800.0 million, and recurring capital expenditures of approximately $150.0 million.
DIVIDENDS
See Note 9 to Notes to Consolidated Financial Statements included in this Annual Report for information on dividends.
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49

NONCONTROLLING INTERESTS
During the quarter ended September 30, 2024, a put option available to our partner in our Iron Mountain Data Centers Virginia 4/5 
JV, LP joint venture expired, triggering a change in the presentation of the related noncontrolling interest. Prior to September 30, 
2024, the noncontrolling interest of approximately $53.4 million was presented as Redeemable noncontrolling interests in our 
Consolidated Balance Sheets. Our partner's interest is now presented as Noncontrolling interests in our Consolidated Balance 
Sheet.
During the quarter ended September 30, 2024, we entered into an agreement with a partner to form our Iron Mountain Data 
Centers Virginia 6/7 JV, LLC joint venture, which resulted in an initial Noncontrolling interest of approximately $103.1 million 
recorded in our Consolidated Balance Sheet at September 30, 2024.
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IRON MOUNTAIN 2024 FORM 10-K

FINANCIAL INSTRUMENTS AND DEBT
Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money 
market funds and time deposits) and accounts receivable. We had no significant concentrations of liquid investments as of 
December 31, 2024.
Long-term debt as of December 31, 2024 is as follows (in thousands): 
 
DECEMBER 31, 2024
 
DEBT (INCLUSIVE
OF DISCOUNT)
UNAMORTIZED
DEFERRED
FINANCING 
COSTS
CARRYING
AMOUNT
Revolving Credit Facility
$ 
121,000 
$ 
(9,253) $ 
111,747 
Term Loan A
 
216,016 
 
— 
 
216,016 
Term Loan B due 2031
 
1,840,181 
 
(14,690)  
1,825,491 
Virginia 3 Term Loans
 
271,079 
 
(3,013)  
268,066 
Virginia 4/5 Term Loans
 
76,535 
 
(2,752)  
73,783 
Virginia 6 Term Loans
 
137,495 
 
(4,605)  
132,890 
Virginia 7 Term Loans
 
32,074 
 
(7,591)  
24,483 
Australian Dollar Term Loan
 
175,813 
 
(265)  
175,548 
UK Bilateral Revolving Credit Facility
 
175,503 
 
(1,034)  
174,469 
37/8% GBP Senior Notes due 2025 (the "GBP Notes")
 
501,437 
 
(789)  
500,648 
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")
 
1,000,000 
 
(3,910)  
996,090 
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")
 
825,000 
 
(3,838)  
821,162 
5% Senior Notes due 2028 (the "5% Notes due 2028")
 
500,000 
 
(2,592)  
497,408 
7% Senior Notes due 2029 (the "7% Notes due 2029")
 
1,000,000 
 
(8,686)  
991,314 
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")
 
1,000,000 
 
(6,871)  
993,129 
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")
 
1,300,000 
 
(8,399)  
1,291,601 
41/2% Senior Notes due 2031 (the "41/2% Notes")
 
1,100,000 
 
(7,674)  
1,092,326 
5% Senior Notes due 2032 (the "5% Notes due 2032")
 
750,000 
 
(9,900)  
740,100 
55/8% Senior Notes due 2032 (the "55/8% Notes")
 
600,000 
 
(4,404)  
595,596 
61/4% Senior Notes due 2033 (the "61/4% Notes")
 
1,200,000 
 
(14,517)  
1,185,483 
Real Estate Mortgages, Financing Lease Liabilities and Other
 
614,231 
 
(1,825)  
612,406 
Accounts Receivable Securitization Program
 
400,000 
 
(670)  
399,330 
Total Long-term Debt
 
13,836,364 
 
(117,278)  
13,719,086 
Less Current Portion
 
(715,109)  
— 
 
(715,109) 
Long-term Debt, Net of Current Portion
$ 
13,121,255 
$ 
(117,278) $ 
13,003,977 
See Note 7 to Notes to Consolidated Financial Statements included in this Annual Report for additional information regarding our 
long-term debt. 
CREDIT AGREEMENT
Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the "Revolving Credit Facility"), a term loan A 
facility (the "Term Loan A") and a term loan B facility (the "Term Loan B due 2031"). The Credit Agreement also included a second 
term loan B facility (the "Term Loan B due 2026") until its extinguishment in August 2024. On June 7, 2024, July 2, 2024, August 
19, 2024 and November 7, 2024, we completed amendments to our Credit Agreement. See Note 7 to Notes to Consolidated 
Financial Statements included in this Annual Report for additional information regarding the various Credit Agreement 
amendments.
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51

The Revolving Credit Facility and the Term Loan A are scheduled to mature on March 18, 2030, at which point all obligations 
become due. The Term Loan B due 2031 is scheduled to mature on January 31, 2031, at which point all obligations become due. 
As of December 31, 2024, we had $121.0 million, $216.0 million and $1,850.7 million outstanding under the Revolving Credit 
Facility, Term Loan A and the Term Loan B due 2031, respectively. As of December 31, 2024, we had various outstanding letters of 
credit totaling $7.8 million under the Revolving Credit Facility. The remaining amount available for borrowing under the Revolving 
Credit Facility as of December 31, 2024, which is based on IMI’s leverage ratio, the last 12 months' earnings before interest, taxes, 
depreciation and amortization and rent expense ("EBITDAR"), other adjustments as defined in the Credit Agreement and current 
external debt, was $2,621.2 million (which amount represents the maximum availability as of such date). Available borrowings 
under the Revolving Credit Facility are subject to compliance with our indenture covenants as discussed below. The weighted 
average interest rate in effect under the Revolving Credit Facility as of December 31, 2024 was 6.3%. The interest rates in effect 
under the Term Loan A and the Term Loan B due 2031 as of December 31, 2024 were 6.1% and 6.4%, respectively.
VIRGINIA CREDIT AGREEMENTS
As our Global Data Center Business continues to expand, we have entered into credit agreements in order to partially finance the 
construction of various data centers. These agreements primarily consist of term loan facilities with the following terms (in 
thousands):
AGREEMENT
MAXIMUM 
BORROWING
AMOUNT
OUTSTANDING 
BORROWINGS AS 
OF December 31, 
2024
DIRECT 
OBLIGOR
CONTRACTUAL INTEREST 
RATE(1)
UNUSED 
COMMITMENT 
FEE
MATURITY 
DATE(2)
Virginia 4/5
$ 
204,987 
$ 
76,535 
Iron Mountain Data Centers 
Virginia 4/5 Subsidiary, LLC
SOFR plus a credit spread 
adjustment of 0.1% plus 1.625%
 0.49 %
October 31, 2025
Virginia 3
 
275,000 
 
271,079 
Iron Mountain Data Centers 
Virginia 3, LLC
SOFR plus 2.50%
 0.75 %
August 31, 2026
Virginia 7 Term 
Loans
 
300,000 
 
32,074 
Iron Mountain Data Centers 
Virginia 7, LLC
SOFR plus 2.50%
 0.75 %
April 12, 2027
Virginia 6 Term 
Loans
 
210,000 
 
137,495 
Iron Mountain Data Centers 
Virginia 6, LLC
SOFR plus 2.75%
 0.75 %
May 3, 2027
(1) The term loans are indexed to the one-month Secured Overnight Financing Rate (the "SOFR") benchmark rate.
(2) All obligations will become due on the specified maturity dates. Each agreement includes two one-year options that allow us to extend the initial maturity date, subject 
to the conditions specified in the agreements.
See Note 7 to Notes to Consolidated Financial Statements included in this Annual Report for additional information regarding these 
agreements.
DECEMBER 2024 OFFERING
On December 6, 2024, IMI completed a private offering of (in thousands):
SERIES OF NOTES
AGGREGATE PRINCIPAL 
AMOUNT
MATURITY DATE
INTEREST PAYMENT 
DUE
PAR CALL DATE(1)
61/4% Notes
$ 
1,200,000 
January 15, 2033
January 15 and July 15
December 6, 2029
(1) We may redeem the 61/4% Notes at any time, at our option, in whole or in part. Prior to the par call date, we may redeem the 61/4% Notes at the redemption price or 
make-whole premium specified in the indenture governing the 61/4% Notes, together with accrued and unpaid interest to, but excluding, the redemption date. On or 
after the par call date, we may redeem the 61/4% Notes at a price equal to 100% of the principal amount being redeemed, together with accrued and unpaid interest 
to, but excluding, the redemption date.
The 61/4% Notes were issued at 100% of par. The total net proceeds of approximately $1,188.0 million from the issuance, after 
deducting the initial purchasers' commissions, were used to repay a portion of the outstanding borrowings under the Revolving 
Credit Facility.
DEBT COVENANTS
The Credit Agreement, our bond indentures and other agreements governing our indebtedness contain certain restrictive financial 
and operating covenants, including covenants that restrict our ability to complete acquisitions, pay cash dividends, incur 
indebtedness, make investments, sell assets and take other specified corporate actions. The covenants do not contain a rating 
trigger. Therefore, a change in our debt rating would not trigger a default under the Credit Agreement, our bond indentures or other 
agreements governing our indebtedness. The Credit Agreement requires that we satisfy a net total lease adjusted leverage ratio 
and a fixed charge coverage ratio on a quarterly basis, and our bond indentures require that, among other things, we satisfy a 
leverage ratio (not lease adjusted) or a fixed charge coverage ratio (not lease adjusted), as a condition to taking actions such as 
paying dividends and incurring indebtedness.
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The Credit Agreement uses EBITDAR-based calculations and the bond indentures use EBITDA based calculations as the primary 
measures of financial performance for purposes of calculating leverage and fixed charge coverage ratios. The EBITDAR- and 
EBITDA-based leverage calculations include our consolidated subsidiaries, other than those we have designated as "Unrestricted 
Subsidiaries" as defined in the Credit Agreement and bond indentures. Generally, the Credit Agreement and the bond indentures 
use a trailing four fiscal quarter basis for purposes of the relevant calculations and require certain adjustments and exclusions for 
purposes of those calculations, which make the calculation of financial performance under the Credit Agreement and bond 
indentures not directly comparable to Adjusted EBITDA as presented herein. These adjustments can be significant. For example, 
the calculation of financial performance under the Credit Agreement and certain of our bond indentures includes (subject to 
specified exceptions and caps) adjustments for non-cash charges and for expected benefits associated with (i) completed 
acquisitions, (ii) certain executed lease agreements associated with our data center business that have yet to commence and (iii) 
restructuring and other strategic initiatives. The calculation of financial performance under our other bond indentures includes, for 
example, adjustments for non-cash charges and for expected benefits associated with (i) completed acquisitions and (ii) events 
that are extraordinary, unusual or non-recurring.
Our leverage and fixed charge coverage ratios under the Credit Agreement as of December 31, 2024 are as follows:
 
DECEMBER 31, 2024
MAXIMUM/MINIMUM ALLOWABLE
Net total lease adjusted leverage ratio
 
5.0 
Maximum allowable of 7.0
Fixed charge coverage ratio
 
2.4 
Minimum allowable of 1.5
We are in compliance with our leverage and fixed charge coverage ratios under the Credit Agreement, our bond indentures and 
other agreements governing our indebtedness as of December 31, 2024. Noncompliance with these leverage and fixed charge 
coverage ratios would have a material adverse effect on our financial condition and liquidity.
___________________________________________________________________________________________________
Our ability to pay interest on or to refinance our indebtedness depends on our future performance, working capital levels and 
capital structure, which are subject to general economic, financial, competitive, legislative, regulatory and other factors which may 
be beyond our control. There can be no assurance that we will generate sufficient cash flow from our operations or that future 
financings will be available on acceptable terms or in amounts sufficient to enable us to service or refinance our indebtedness or to 
make necessary capital expenditures.
DERIVATIVE INSTRUMENTS
INTEREST RATE SWAP AGREEMENTS
We utilize interest rate swap agreements designated as cash flow hedges to limit our exposure to changes in interest rates on a 
portion of our floating rate indebtedness. Certain of our interest rate swap agreements have notional amounts that will increase with 
the underlying hedged transaction. Under our interest rate swap agreements, we receive variable rate interest payments 
associated with the notional amount of each interest rate swap, based upon the SOFR, in exchange for the payment of fixed 
interest rates as specified in the interest rate swap agreements. Our interest rate swap agreements are marked to market at the 
end of each reporting period, representing the fair values of the interest rate swap agreements, and any changes in fair value are 
recognized as a component of Accumulated other comprehensive items, net. Unrealized gains are recognized as assets, while 
unrealized losses are recognized as liabilities. 
In April 2023, in anticipation of the discontinuance of the London Inter-Bank Offered Rate ("LIBOR") reference rate on June 30, 
2023, we terminated interest rate swap agreements with notional amounts totaling $350.0 million that were indexed to the one-
month LIBOR benchmark rate. The terminated swap agreements had associated unrealized gains at the termination date of 
approximately $10.1 million. These gains were included in Accumulated other comprehensive items, net and have been reclassified 
into earnings as reductions to interest expense from the termination date through March 2024, the original maturity date of these 
interest rate swap agreements.
As of December 31, 2024 and 2023, we have approximately $1,482.0 million and $520.0 million, respectively, in notional value 
outstanding on our interest rate swap agreements. As of December 31, 2024, our interest rate swap agreements have maturity 
dates ranging from October 2025 through May 2027.
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CROSS-CURRENCY SWAP AGREEMENTS
We utilize cross-currency interest rate swaps to hedge the variability of exchange rate impacts between the United States dollar 
and certain of our foreign functional currencies, including the Euro and the Canadian dollar. As of December 31, 2024, our cross-
currency interest rate swap agreements have maturity dates ranging from August 2025 through November 2026.
The notional values of our cross-currency interest rate swaps, by currency, as of December 31, 2024 and 2023 are as follows (in 
thousands):
 
YEAR ENDED DECEMBER 31,
 
2024
2023
Euro
$ 
509,187 
$ 
509,187 
Canadian dollar
 
350,000 
 
— 
$ 
859,187 
$ 
509,187 
We have designated these cross-currency swap agreements as hedges of net investments in our Euro and Canadian dollar 
denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap 
agreements are marked to market at the end of each reporting period, representing the fair values of the cross-currency swap 
agreements, and any changes in fair value are recognized as a component of Accumulated other comprehensive items, net. 
Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The excluded component of our 
cross-currency swap agreements is recorded in Accumulated other comprehensive items, net and amortized to interest expense on 
a straight-line basis.
See Note 6 to Notes to Consolidated Financial Statements included in this Annual Report for additional information on our 
derivative instruments. 
ACQUISITIONS
See Note 3 to Notes to Consolidated Financial Statements included in this Annual Report for information regarding our acquisitions.
REGENCY TECHNOLOGIES
On January 3, 2024, in order to expand our ALM business, we acquired 100% of RSR Partners, LLC (doing business as Regency 
Technologies), an IT asset disposition services provider with operations throughout the United States, for an initial purchase price 
of approximately $200.0 million, subject to certain working capital adjustments at, and subsequent to, the closing, with 
$125.0 million paid at closing, funded by borrowings under the Revolving Credit Facility, and the remaining $75.0 million (the 
"January 2025 Payment"), paid in January 2025 (the "Regency Transaction"). The present value of the January 2025 Payment is 
included as a component of Accrued expenses and other current liabilities in our Consolidated Balance Sheet at December 31, 
2024. The agreement for the Regency Transaction also includes a performance-based contingent consideration with a potential 
earnout range from zero to $200.0 million based upon achievement of certain three-year cumulative revenue targets, which would 
be payable in 2027, if earned. The preliminary fair value estimate of this deferred purchase obligation as of the acquisition date was 
approximately $78.4 million. The fair value of the deferred purchase obligation is included as a component of Other long-term 
liabilities in our Consolidated Balance Sheet at December 31, 2024. Subsequent increases or decreases in the fair value estimate 
of the deferred purchase obligation, as well as the accretion of the discount to present value, is included as a component of Other 
expense (income), net in our Consolidated Statements of Operations until the deferred purchase obligation is settled or paid. 
Subsequent to the acquisition, the results of Regency Technologies are included as a component of Corporate and Other.
PRIOR YEAR ACQUISITION UPDATE
On July 1, 2024, we entered into an agreement with the minority shareholders of Web Werks India Private Limited to acquire the 
remaining approximately 36.61% interest in the Web Werks JV in two separate transactions. As a result of the agreement, during 
the third quarter of 2024, we recognized a charge of approximately $29.2 million, which is included as a component of Other 
expense (income), net in our Consolidated Statement of Operations for the year ended December 31, 2024. On July 5, 2024, we 
completed the acquisition of an approximately 8.55% interest in the Web Werks JV ("Tranche I") for approximately 3,000.0 million 
Indian rupees (or approximately $35.0 million based upon the exchange rate between the United States dollar and the Indian rupee 
on the closing date of Tranche I). Subsequent to the Tranche I payment, our ownership interest in the Web Werks JV is 
approximately 71.94%. In March 2025, we will be required to make an additional payment of approximately 9,600.0 million Indian 
rupees (or approximately $112.2 million, based upon the exchange rate between the United States dollar and the Indian rupee as 
of December 31, 2024) to acquire the remaining approximately 28.06% interest in the Web Werks JV ("Tranche II"). As part of the 
Tranche II payment in March 2025, we may also make an incremental payment of approximately 1,000.0 million Indian rupees (or 
approximately $11.7 million, based upon the exchange rate between the United States dollar and the Indian rupee as of December 
31, 2024) (the "Incremental Payment") if certain infrastructure goals are achieved before December 31, 2024. We are currently 
assessing the achievement of these goals. The liability associated with Tranche II and our current estimate of the Incremental 
Payment is included within Accrued expenses and other current liabilities in our Consolidated Balance Sheet at December 31, 
2024.
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IRON MOUNTAIN 2024 FORM 10-K

INVESTMENTS
JOINT VENTURE SUMMARY
The following joint venture is accounted for as an equity method investment and is presented as a component of Other within Other 
assets, net in our Consolidated Balance Sheets. The carrying value and equity interest in our unconsolidated joint venture at 
December 31, 2024 is as follows (in thousands):
December 31, 2024
CARRYING VALUE
EQUITY INTEREST
Joint venture with AGC Equity Partners
$ 
61,075 
 20.00 %
NET OPERATING LOSSES
At December 31, 2024, we have federal net operating loss carryforwards of $95.5 million and disallowed interest expense 
carryforwards of $152.2 million, both of which can be carried forward indefinitely, and of which $89.2 million and $68.7 million, 
respectively, are expected to be realized to reduce future federal taxable income. We have assets for foreign net operating losses 
of $146.6 million and foreign disallowed interest expense carryforwards of $17.7 million, with various expiration dates (and in some 
cases no expiration date), subject to valuation allowances of approximately 72.0% and 46.5%, respectively.
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ITEM 7A. QUANTITATIVE AND QUALITATIVE 
DISCLOSURES ABOUT MARKET RISK.
CREDIT RISK
Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money 
market funds and time deposits) and accounts receivable. We had no significant concentrations of liquid investments as of 
December 31, 2024. As per our risk management investment policy, we limit exposure to concentration of credit risk by limiting the 
amount invested in any one mutual fund to a maximum of 1% of the fund's total assets or in any one financial institution to a 
maximum of $75.0 million. As of December 31, 2024, our cash and cash equivalents balance was $155.7 million.
INTEREST RATE RISK
Given the recurring nature of our revenues and the long-term nature of our asset base, we have the ability and the preference to 
use long-term, fixed interest rate debt to finance our business at attractive rates, thereby helping to preserve our long-term returns 
on invested capital. Occasionally, we may use interest rate swaps as a tool to maintain our targeted level of fixed rate debt.
As of December 31, 2024, approximately 14.4%, or $1,989.4 million, of our total long-term debt outstanding was subject to variable 
interest rates. If the weighted average variable interest rate on our variable rate debt had increased by 1%, our net income for the 
year ended December 31, 2024 would have been reduced by approximately $23.2 million. 
See Note 6 to Notes to Consolidated Financial Statements included in this Annual Report for a discussion on our interest rate 
swaps and Note 7 to Notes to Consolidated Financial Statements included in this Annual Report for a discussion of our long-term 
indebtedness, including the fair values of such indebtedness as of December 31, 2024.
CURRENCY RISK 
Our international investments may be subject to risks and uncertainties related to fluctuations in currency valuation. Our reporting 
currency is the United States dollar. However, our international revenues and expenses are generated in the currencies of the 
countries in which we operate, primarily the British pound sterling, Euro, Canadian dollar and Australian dollar. Declines in the 
value of the local currencies in which we are paid relative to the United States dollar will cause revenues in United States dollar 
terms to decrease and dollar-denominated liabilities to increase in local currency. The impact of currency fluctuations on our 
earnings is mitigated by the fact that most operating and other expenses are also incurred and paid in the local currency. We also 
have several intercompany obligations with and between certain of our subsidiaries of differing functional currencies, resulting in 
foreign transaction gains or losses based on period-end exchange rates.
We have adopted and implemented a number of strategies to mitigate the risks associated with fluctuations in foreign currency 
exchange rates. One strategy is to finance certain of our international subsidiaries with debt that is denominated in local currencies, 
thereby providing a natural hedge. In determining the amount of any such financing, we take into account local tax considerations, 
among other factors. Another strategy we utilize is for IMI or IMIM to borrow in foreign currencies to hedge our intercompany 
financing activities. In addition, on occasion, we enter into currency swaps to temporarily or permanently hedge an overseas 
investment, such as a major acquisition, to lock in certain transaction economics. IM UK has financed a portion of its capital needs 
through the issuance of the GBP Notes and through borrowings under the UK Bilateral Revolving Credit Facility, each of which are 
denominated in British pounds sterling. Our Australian business has financed a portion of its capital needs through direct 
borrowings in Australian dollars under the AUD Term Loan. This creates a tax efficient natural currency hedge. 
We have entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United 
States dollar and certain of our functional foreign currencies, including the Euro and the Canadian dollar. These cross-currency 
swap agreements are designated as a hedge of net investment against certain of our Euro and Canadian dollar denominated 
subsidiaries and require an exchange of the notional amounts at maturity. These cross-currency swap agreements are marked to 
market at the end of each reporting period, representing the fair values of the cross-currency swap agreements, and any changes 
in fair value are recognized as a component of Accumulated other comprehensive items, net. Unrealized gains are recognized as 
assets, which are recorded as either a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net, while 
unrecognized losses are recognized as liabilities, which are recorded as either a component of (i) Accrued expenses and other 
current liabilities or (ii) Other long-term liabilities in our Consolidated Balance Sheets. 
See Note 6 to Notes to Consolidated Financial Statements included in this Annual Report for a discussion on our cross-currency 
swap agreements.
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The impact of devaluation or depreciating currency on an entity depends on the residual effect on the local economy and the ability 
of an entity to raise prices and/or reduce expenses. Due to our constantly changing currency exposure and the potential substantial 
volatility of currency exchange rates, we cannot predict the effect of exchange fluctuations on our business. The effect of a change 
in foreign currency exchange rates on our net investment in foreign subsidiaries is reflected in the "Accumulated Other 
Comprehensive Items, net" component of equity. A 10% depreciation in year-end 2024 functional currencies, relative to the United 
States dollar, would result in a reduction in our equity of $335.6 million.
ITEM 8. FINANCIAL STATEMENTS AND 
SUPPLEMENTARY DATA.
The information required by this item is included in Item 15(a) of this Annual Report.
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH 
ACCOUNTANTS ON ACCOUNTING AND FINANCIAL 
DISCLOSURE.
None.
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ITEM 9A. CONTROLS AND PROCEDURES. 
DISCLOSURE CONTROLS AND PROCEDURES
The term "disclosure controls and procedures" is defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act. These rules refer 
to the controls and other procedures of a company that are designed to ensure that information is recorded, processed, 
accumulated, summarized, communicated and reported to management, including its principal executive and principal financial 
officers, as appropriate to allow timely decisions regarding what is required to be disclosed by a company in the reports that it files 
under the Exchange Act. As of December 31, 2024 (the "Evaluation Date"), we carried out an evaluation, under the supervision and 
with the participation of our management, including our chief executive officer and chief financial officer, of the effectiveness of our 
disclosure controls and procedures. Based upon that evaluation, our chief executive officer and chief financial officer concluded 
that, as of the Evaluation Date, our disclosure controls and procedures are effective.
MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER 
FINANCIAL REPORTING
Our management, with the participation of our principal executive officer and principal financial officer, is responsible for 
establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the 
Exchange Act. Our internal control system is designed to provide reasonable assurance to our management and board of directors 
regarding the preparation and fair presentation of published financial statements. Due to their inherent limitations, internal control 
over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods 
are subject to the risks that controls may become inadequate because of changes in conditions or that the degree of compliance 
with policies or procedures may deteriorate. Under the supervision and with the participation of our management, including our 
chief executive officer and chief financial officer, we conducted an evaluation of the effectiveness of our internal control over 
financial reporting based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of 
Sponsoring Organizations of the Treadway Commission. Based on this evaluation, our management concluded that our internal 
control over financial reporting was effective as of December 31, 2024.
The effectiveness of our internal control over financial reporting has been audited by Deloitte & Touche LLP, an independent 
registered public accounting firm, as stated in their report which is included in this Annual Report.
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REPORT OF INDEPENDENT REGISTERED PUBLIC 
ACCOUNTING FIRM
To the shareholders and the Board of Directors of Iron Mountain Incorporated
OPINION ON INTERNAL CONTROL OVER FINANCIAL REPORTING
We have audited the internal control over financial reporting of Iron Mountain Incorporated and subsidiaries (the "Company") as of 
December 31, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of 
Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, 
effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control — 
Integrated Framework (2013) issued by COSO.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(PCAOB), the consolidated financial statements as of and for the year ended December 31, 2024, of the Company and our report 
dated February 14, 2025, expressed an unqualified opinion on those financial statements.
BASIS FOR OPINION
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment 
of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal 
Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial 
reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with 
respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the 
Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material 
respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a 
material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed 
risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a 
reasonable basis for our opinion.
DEFINITION AND LIMITATIONS OF INTERNAL CONTROL OVER FINANCIAL 
REPORTING
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability 
of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted 
accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain 
to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that 
could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ DELOITTE & TOUCHE LLP
Boston, Massachusetts
February 14, 2025
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59

CHANGES IN INTERNAL CONTROL OVER FINANCIAL 
REPORTING
Our management, with the participation of our principal executive officer and principal financial officer, is responsible for 
establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the 
Exchange Act. Our internal control system is designed to provide reasonable assurance to our management and board of directors 
regarding the preparation and fair presentation of published financial statements.
There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the 
quarter ended December 31, 2024 that have materially affected, or are reasonably likely to materially affect, our internal control 
over financial reporting.
ITEM 9B. OTHER INFORMATION.
During the three months ended December 31, 2024, no director or officer of the Company adopted, modified, or terminated a “Rule 
10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
ITEM 9C. DISCLOSURE REGARDING FOREIGN 
JURISDICTIONS THAT PREVENT INSPECTIONS.
Not applicable.
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PART III
ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND 
CORPORATE GOVERNANCE.
The information required by Item 10 is incorporated by reference to our Proxy Statement.
The Company has adopted its Insider Trading Policy containing insider trading policies and procedures governing the purchase, 
sale, and/or other dispositions of the Company’s securities by the Company or its directors, officers and employees that we believe 
are reasonably designed to promote compliance with insider trading laws, rules and regulations, and any listing standards 
applicable to the Company. A copy of the Insider Trading Policy is filed hereto as Exhibit 19.1 to this Annual Report on Form 10-K.
ITEM 11. EXECUTIVE COMPENSATION.
The information required by Item 11 is incorporated by reference to our Proxy Statement.
ITEM 12. SECURITY OWNERSHIP OF CERTAIN 
BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS.
The information required by Item 12 is incorporated by reference to our Proxy Statement.
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED 
TRANSACTIONS, AND DIRECTOR INDEPENDENCE.
The information required by Item 13 is incorporated by reference to our Proxy Statement.
ITEM 14. PRINCIPAL ACCOUNTANT FEES AND 
SERVICES. 
The information required by Item 14 is incorporated by reference to our Proxy Statement.
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PART IV
ITEM 15. EXHIBITS AND FINANCIAL STATEMENT 
SCHEDULES.
(a) Financial Statements filed as part of this report:
 
PAGE
IRON MOUNTAIN INCORPORATED
Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34) 
65
Consolidated Balance Sheets, December 31, 2024 and 2023
67
Consolidated Statements of Operations, Years Ended December 31, 2024, 2023 and 2022
68
Consolidated Statements of Comprehensive Income (Loss), Years Ended December 31, 2024, 2023 and 2022
69
Consolidated Statements of (Deficit) Equity, Years Ended December 31, 2024, 2023 and 2022
70
Consolidated Statements of Cash Flows, Years Ended December 31, 2024, 2023 and 2022
71
Notes to Consolidated Financial Statements
72
Financial Statement Schedule III—Schedule of Real Estate and Accumulated Depreciation
124
(b) Exhibits filed as part of this report: As listed in the Exhibit Index following the Financial Statement Schedule III-Schedule of 
Real Estate and Accumulated Depreciation.
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REPORT OF INDEPENDENT REGISTERED PUBLIC 
ACCOUNTING FIRM
To the shareholders and the Board of Directors of Iron Mountain Incorporated
OPINION ON THE FINANCIAL STATEMENTS
We have audited the accompanying consolidated balance sheets of Iron Mountain Incorporated and subsidiaries (the "Company") 
as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive income (loss), (deficit) 
equity, and cash flows, for each of the three years in the period ended December 31, 2024, and the related notes and the schedule 
listed in the Index at Item 15 (collectively referred to as the "financial statements"). In our opinion, the financial statements present 
fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its 
operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting 
principles generally accepted in the United States of America.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(PCAOB), the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal 
Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and 
our report dated February 14, 2025, expressed an unqualified opinion on the Company's internal control over financial reporting.
BASIS FOR OPINION
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the 
Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required 
to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and 
regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to 
error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, 
whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a 
test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the 
accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the 
financial statements. We believe that our audits provide a reasonable basis for our opinion.
CRITICAL AUDIT MATTER
The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was 
communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are 
material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The 
communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we 
are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the 
accounts or disclosures to which it relates.
Table of Contents
Part IV
IRON MOUNTAIN 2024 FORM 10-K
65

GOODWILL - ASSET LIFECYCLE MANAGEMENT REPORTING UNIT - REFER TO NOTE 2.L. 
TO THE FINANCIAL STATEMENTS 
CRITICAL AUDIT MATTER DESCRIPTION
The Company’s evaluation of goodwill for impairment involves the comparison of the fair value of the reporting unit to its carrying 
value. The Company determined the fair value of the Asset Lifecycle Management reporting unit based on the present value of 
future cash flows (the "Discounted Cash Flow Model"). The determination of the fair value using the Discounted Cash Flow Model 
requires management to make significant assumptions related to future revenue growth rates, operating margins, and discount 
rates. Changes in economic and operating conditions impacting these assumptions could result in goodwill impairment in future 
periods. The goodwill balance allocated to the Asset Lifecycle Management reporting unit was $748.0 million as of October 1, 2024 
(goodwill impairment testing date). The fair value of the Asset Lifecycle Management reporting unit exceeded its carrying value as 
of the measurement date and, therefore, no impairment was recognized.
We identified the evaluation of goodwill for the Asset Lifecycle Management reporting unit for impairment as a critical audit matter 
because of the significant judgments made by management to estimate the fair value of the Asset Lifecycle Management reporting 
unit. Performing audit procedures to evaluate the reasonableness of management’s estimates and assumptions related to selection 
of the discount rate and forecasts of future revenue and operating margin of the Asset Lifecycle Management reporting unit 
required a high degree of auditor judgment and an increased extent of effort, including the need to involve our fair value specialists.
HOW THE CRITICAL AUDIT MATTER WAS ADDRESSED IN THE AUDIT
Our audit procedures related to testing the reasonableness of key assumptions within the Discounted Cash Flow Model of the 
Asset Lifecycle Management reporting unit. The key assumptions include future revenue growth rates, operating margins, and the 
selection of the discount rate. We performed the following procedures as part of the audit: 
•
We evaluated management’s ability to accurately forecast by comparing actual results to management’s historical forecasts. 
•
We evaluated the reasonableness of the revenue growth rates and operating margins presented within management’s 
Discounted Cash Flow Model by comparing it to (1) historical results, (2) internal communications to management and the Board 
of Directors, and (3) forecasted information included in Company press releases and industry reports in which Asset Lifecycle 
Management operates.
•
With the assistance of our fair value specialists, we evaluated the discount rate, including testing the underlying source 
information and the mathematical accuracy of the calculation, and developing a range of independent estimates and comparing 
that to the discount rate selected by management.
•
We tested the effectiveness of controls over the evaluation of goodwill for impairment, including those over the Discounted Cash 
Flow Model and discount rate.
/s/ DELOITTE & TOUCHE LLP
Boston, Massachusetts
February 14, 2025
We have served as the Company’s auditor since 2002.
Table of Contents
Part IV
66
IRON MOUNTAIN 2024 FORM 10-K

CONSOLIDATED BALANCE SHEETS
(IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
 
DECEMBER 31,
 
2024
2023
ASSETS
 
 
Current Assets:
 
 
Cash and cash equivalents
$ 
155,716 
$ 
222,789 
Accounts receivable (less allowances of $86,712 and $74,762 as of December 31, 2024 and 2023, 
respectively)
 
1,291,379 
 
1,259,826 
Prepaid expenses and other
 
244,127 
 
252,930 
Total Current Assets
 
1,691,222 
 
1,735,545 
Property, plant and equipment
 
11,985,997 
 
10,373,989 
Less—Accumulated depreciation
 
(4,354,398)  
(4,059,120) 
Property, Plant and Equipment, Net
 
7,631,599 
 
6,314,869 
Other Assets, Net:
 
 
Goodwill
 
5,083,817 
 
5,017,912 
Customer and supplier relationships and other intangible assets
 
1,274,731 
 
1,279,800 
Operating lease right-of-use assets 
 
2,489,893 
 
2,696,024 
Other
 
545,853 
 
429,652 
Total Other Assets, Net
 
9,394,294 
 
9,423,388 
Total Assets
$ 
18,717,115 
$ 
17,473,802 
LIABILITIES AND EQUITY
 
 
Current Liabilities:
 
 
Current portion of long-term debt
$ 
715,109 
$ 
120,670 
Accounts payable
 
678,716 
 
539,594 
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)
 
1,366,568 
 
1,250,259 
Deferred revenue
 
326,882 
 
325,665 
Total Current Liabilities
 
3,087,275 
 
2,236,188 
Long-term Debt, net of current portion
 
13,003,977 
 
11,812,500 
Long-term Operating Lease Liabilities, net of current portion
 
2,334,826 
 
2,562,394 
Other Long-term Liabilities
 
312,199 
 
237,590 
Deferred Income Taxes
 
205,341 
 
235,410 
Commitments and Contingencies
Redeemable Noncontrolling Interests 
 
78,171 
 
177,947 
(Deficit) Equity:
 
 
Iron Mountain Incorporated Stockholders’ (Deficit) Equity:
 
 
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)
 
— 
 
— 
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 
293,592,637 shares and 292,142,739 shares as of December 31, 2024 and 2023, respectively)
 
2,936 
 
2,921 
Additional paid-in capital
 
4,647,330 
 
4,533,691 
(Distributions in excess of earnings) Earnings in excess of distributions
 
(4,583,436)  
(3,953,808) 
Accumulated other comprehensive items, Net
 
(569,952)  
(371,156) 
Total Iron Mountain Incorporated Stockholders’ (Deficit) Equity
 
(503,122)  
211,648 
Noncontrolling Interests
 
198,448 
 
125 
Total (Deficit) Equity
 
(304,674)  
211,773 
Total Liabilities and (Deficit) Equity
$ 
18,717,115 
$ 
17,473,802 
 
The accompanying notes are an integral part of these consolidated financial statements.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
IRON MOUNTAIN 2024 FORM 10-K
67

CONSOLIDATED STATEMENTS OF OPERATIONS
(IN THOUSANDS, EXCEPT PER SHARE DATA)
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Revenues:
 
 
 
Storage rental
$ 
3,682,259 
$ 
3,370,645 
$ 
3,034,023 
Service
 
2,467,650 
 
2,109,644 
 
2,069,551 
Total Revenues
 
6,149,909 
 
5,480,289 
 
5,103,574 
Operating Expenses:
 
 
 
Cost of sales (excluding depreciation and amortization)
 
2,696,549 
 
2,357,800 
 
2,189,120 
Selling, general and administrative
 
1,339,539 
 
1,236,287 
 
1,140,577 
Depreciation and amortization
 
900,905 
 
776,159 
 
727,595 
Acquisition and Integration Costs
 
35,842 
 
25,875 
 
47,746 
Restructuring and other transformation
 
161,359 
 
175,215 
 
41,933 
Loss (gain) on disposal/write-down of property, plant and equipment, net
 
6,196 
 
(12,825)  
(93,268) 
Total Operating Expenses
 
5,140,390 
 
4,558,511 
 
4,053,703 
Operating Income (Loss)
 
1,009,519 
 
921,778 
 
1,049,871 
Interest Expense, Net (includes Interest Income of $14,672, $12,471 and $8,276 in 2024, 
2023 and 2022, respectively)
 
721,559 
 
585,932 
 
488,014 
Other Expense (Income), Net
 
43,422 
 
108,640 
 
(69,781) 
Net Income (Loss) Before Provision (Benefit) for Income Taxes
 
244,538 
 
227,206 
 
631,638 
Provision (Benefit) for Income Taxes
 
60,872 
 
39,943 
 
69,489 
Net Income (Loss)
 
183,666 
 
187,263 
 
562,149 
Less: Net income (loss) attributable to noncontrolling interests
 
3,510 
 
3,029 
 
5,168 
Net Income (Loss) Attributable to Iron Mountain Incorporated
$ 
180,156 
$ 
184,234 
$ 
556,981 
Earnings (Losses) Per Share Attributable to Iron Mountain Incorporated:
 
 
 
Basic
$ 
0.61 
$ 
0.63 
$ 
1.92 
Diluted
$ 
0.61 
$ 
0.63 
$ 
1.90 
Weighted Average Common Shares Outstanding:
Basic
 
293,365 
 
291,936 
 
290,812 
Diluted
 
296,234 
 
293,965 
 
292,444 
The accompanying notes are an integral part of these consolidated financial statements.
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Part IV
IRON MOUNTAIN INCORPORATED
68
IRON MOUNTAIN 2024 FORM 10-K

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME 
(LOSS)
(IN THOUSANDS)
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Net Income (Loss)
$ 
183,666 
$ 
187,263 
$ 
562,149 
Other Comprehensive (Loss) Income:
 
 
Foreign Currency Translation Adjustment
 
(195,368)  
80,657 
 
(113,966) 
   Change in Fair Value of Derivative Instruments
 
(1,767)  
(2,454)  
9,829 
   Reclassifications from Accumulated Other Comprehensive Items, net
 
(2,528)  
(7,580)  
— 
Total Other Comprehensive (Loss) Income
 
(199,663)  
70,623 
 
(104,137) 
Comprehensive (Loss) Income
 
(15,997)  
257,886 
 
458,012 
Comprehensive Income (Loss) Attributable to Noncontrolling Interests
 
2,643 
 
2,805 
 
4,687 
Comprehensive (Loss) Income Attributable to Iron Mountain Incorporated
$ 
(18,640) $ 
255,081 
$ 
453,325 
The accompanying notes are an integral part of these consolidated financial statements.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
IRON MOUNTAIN 2024 FORM 10-K
69

CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY
(IN THOUSANDS, EXCEPT SHARE DATA)
 
IRON MOUNTAIN INCORPORATED STOCKHOLDERS’ (DEFICIT) EQUITY
 
COMMON STOCK
ADDITIONAL
PAID-IN
CAPITAL
(DISTRIBUTIONS IN
EXCESS OF
EARNINGS) 
EARNINGS IN
EXCESS OF
DISTRIBUTIONS
ACCUMULATED
OTHER
COMPREHENSIVE
ITEMS, NET
NONCONTROLLING
INTERESTS
REDEEMABLE 
NONCONTROLLING 
INTERESTS
 
TOTAL
SHARES
AMOUNTS
Balance, December 31, 2021
$ 
857,068 
 289,757,061 
$ 
2,898 
$ 
4,412,553 
$ 
(3,221,152) 
$ 
(338,347) 
$ 
1,116 
$ 
72,411 
Issuance of shares under 
employee stock purchase and 
option plans and stock-based 
compensation
 
52,012 
 
1,073,235 
 
10 
 
52,002 
 
— 
 
— 
 
— 
 
— 
Changes in equity related to 
noncontrolling interests
 
9,734 
 
— 
 
— 
 
6,099 
 
— 
 
— 
 
3,635 
 
(8,264) 
Parent cash dividends 
declared
 
(728,101)  
— 
 
— 
 
— 
 
(728,101) 
 
— 
 
— 
 
— 
Other comprehensive (loss) 
income
 
(104,250)  
— 
 
— 
 
— 
 
— 
 
(103,656) 
 
(594) 
 
113 
Net income (loss)
 
557,343 
 
— 
 
— 
 
— 
 
556,981 
 
— 
 
362 
 
4,806 
Noncontrolling interests equity 
contributions and related costs
 
(2,494)  
— 
 
— 
 
(2,619) 
 
— 
 
— 
 
125 
 
29,047 
Noncontrolling interests 
dividends
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
(2,953) 
Redemption of noncontrolling 
Interests
 
(4,519)  
— 
 
— 
 
— 
 
— 
 
— 
 
(4,519) 
 
— 
Balance, December 31, 2022
 
636,793 
 290,830,296 
 
2,908 
 
4,468,035 
 
(3,392,272) 
 
(442,003) 
 
125 
 
95,160 
Issuance and net settlement of 
shares under employee stock 
purchase and option plans and 
stock-based compensation
 
65,045 
 
1,312,443 
 
13 
 
65,032 
 
— 
 
— 
 
— 
 
— 
Changes in equity related to 
redeemable noncontrolling 
interests 
 
970 
 
— 
 
— 
 
970 
 
— 
 
— 
 
— 
 
(1,367) 
Parent cash dividends 
declared
 
(745,770)  
— 
 
— 
 
— 
 
(745,770) 
 
— 
 
— 
 
— 
Other comprehensive income 
(loss)
 
70,847 
 
— 
 
— 
 
— 
 
— 
 
70,847 
 
— 
 
(224) 
Net income (loss)
 
184,234 
 
— 
 
— 
 
— 
 
184,234 
 
— 
 
— 
 
3,029 
Noncontrolling interests equity 
contributions and related costs
 
(346)  
— 
 
— 
 
(346) 
 
— 
 
— 
 
— 
 
24,684 
Noncontrolling interests 
dividends
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
(3,855) 
Redemption of noncontrolling 
Interests
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
— 
 
60,520 
Balance, December 31, 2023
 
211,773 
 292,142,739 
 
2,921 
 
4,533,691 
 
(3,953,808) 
 
(371,156) 
 
125 
 
177,947 
Issuance and net settlement of 
shares under employee stock 
purchase and option plans and 
stock-based compensation
 
105,941 
 
1,449,898 
 
15 
 
105,926 
 
— 
 
— 
 
— 
 
— 
Changes in equity related to 
redeemable noncontrolling 
interests
 
(9,529)  
— 
 
— 
 
(62,940) 
 
— 
 
— 
 
53,411 
 
(105,470) 
Parent cash dividends 
declared
 
(809,784)  
— 
 
— 
 
— 
 
(809,784) 
 
— 
 
— 
 
— 
Other comprehensive (loss) 
income
 
(198,796)  
— 
 
— 
 
— 
 
— 
 
(198,796) 
 
— 
 
(867) 
Net income (loss)
 
181,819 
 
— 
 
— 
 
— 
 
180,156 
 
— 
 
1,663 
 
1,847 
Noncontrolling interests equity 
contributions and related costs
 
213,910 
 
— 
 
— 
 
70,653 
 
— 
 
— 
 
143,257 
 
7,390 
Noncontrolling interests 
dividends
 
(8)  
— 
 
— 
 
— 
 
— 
 
— 
 
(8) 
 
(2,676) 
Balance, December 31, 2024
$ 
(304,674)  293,592,637 
$ 
2,936 
$ 
4,647,330 
$ 
(4,583,436) 
$ 
(569,952) 
$ 
198,448 
$ 
78,171 
The accompanying notes are an integral part of these consolidated financial statements.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
70
IRON MOUNTAIN 2024 FORM 10-K

CONSOLIDATED STATEMENTS OF CASH FLOWS
(IN THOUSANDS)
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Cash Flows from Operating Activities:
 
 
 
Net income (loss)
$ 
183,666 
$ 
187,263 
$ 
562,149 
Adjustments to reconcile net income (loss) to cash flows from operating activities:
 
 
Depreciation
 
629,296 
 
525,850 
 
478,984 
Amortization (includes amortization of deferred financing costs and discounts of $25,580, $16,859 and 
$18,044 in 2024, 2023 and 2022, respectively)
 
297,189 
 
267,168 
 
266,655 
Revenue reduction associated with amortization of customer inducements and data center above- and 
below-market leases
 
5,347 
 
7,036 
 
8,119 
Stock-based compensation expense
 
118,138 
 
73,799 
 
56,861 
(Benefit) provision for deferred income taxes
 
(41,415)  
(35,264)  
(55,920) 
Loss (gain) on disposal/write-down of property, plant and equipment, net 
 
6,196 
 
(12,825)  
(93,268) 
Loss on deconsolidation
 
— 
 
— 
 
105,825 
Loss (gain) associated with the remeasurement of deferred purchase obligations
 
29,498 
 
— 
 
(93,600) 
Loss (gain) associated with the Clutter transactions
 
— 
 
38,000 
 
(35,821) 
Foreign currency transactions and other, net
 
41,191 
 
103,134 
 
(19,853) 
(Increase) decrease in assets
 
(78,282)  
(70,287)  
(224,641) 
Increase (decrease) in liabilities
 
5,884 
 
29,693 
 
(27,795) 
Cash Flows from Operating Activities
 
1,196,708 
 
1,113,567 
 
927,695 
Cash Flows from Investing Activities:
 
 
Capital expenditures 
 
(1,791,564)  
(1,339,223)  
(875,378) 
Cash paid for acquisitions, net of cash acquired
 
(178,414)  
(41,849)  
(803,690) 
Acquisition of customer intangibles
 
(62,386)  
(5,874)  
(8,205) 
Contract costs
 
(112,542)  
(95,124)  
(70,336) 
Investments in joint ventures and other investments, net
 
(9,834)  
(15,830)  
(73,233) 
Proceeds from sales of property and equipment and other, net
 
17,979 
 
53,544 
 
170,419 
Cash Flows from Investing Activities
 
(2,136,761)  
(1,444,356)  
(1,660,423) 
Cash Flows from Financing Activities:
 
 
Repayment of revolving credit facility, term loan facilities and other debt
 
(14,473,019)  
(18,191,921)  
(11,593,452) 
Proceeds from revolving credit facility, term loan facilities and other debt
 
14,965,010 
 
18,386,168 
 
12,949,766 
Net proceeds from sales of senior notes
 
1,188,000 
 
990,000 
 
— 
Equity contributions from noncontrolling interests
 
230,814 
 
24,684 
 
29,172 
Debt repayment and equity distribution to noncontrolling interests
 
(2,684)  
(3,855)  
(2,953) 
Repurchase of noncontrolling interest
 
(35,203)  
(400)  
(4,519) 
Parent cash dividends
 
(789,527)  
(737,650)  
(724,388) 
Payment of deferred purchase obligations
 
(158,775)  
— 
 
— 
Net (payments) proceeds associated with employee stock-based awards 
 
(12,197)  
(8,754)  
(4,849) 
Other, net
 
(35,674)  
(32,606)  
(9,570) 
Cash Flows from Financing Activities
 
876,745 
 
425,666 
 
639,207 
Effect of Exchange Rates on Cash and Cash Equivalents
 
(3,765)  
(13,885)  
(20,510) 
(Decrease) increase in Cash and Cash Equivalents
 
(67,073)  
80,992 
 
(114,031) 
Cash and Cash Equivalents, Beginning of Year
 
222,789 
 
141,797 
 
255,828 
Cash and Cash Equivalents, End of Year
$ 
155,716 
$ 
222,789 
$ 
141,797 
Supplemental Information:
 
 
Cash Paid for Interest
$ 
770,688 
$ 
512,446 
$ 
482,673 
Cash Paid for Income Taxes, Net
$ 
90,742 
$ 
89,599 
$ 
99,631 
Non-Cash Investing and Financing Activities:
 
 
Financing Leases and Other
$ 
144,498 
$ 
135,492 
$ 
49,836 
Accrued Capital Expenditures
$ 
341,752 
$ 
234,315 
$ 
172,589 
Deferred Purchase Obligations and Other Deferred Payments
$ 
268,861 
$ 
18,575 
$ 
193,033 
Dividends Payable
$ 
222,649 
$ 
202,392 
$ 
194,272 
The accompanying notes are an integral part of these consolidated financial statements.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
IRON MOUNTAIN 2024 FORM 10-K
71

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
DECEMBER 31, 2024
(In thousands, except share and per share data) 
1. NATURE OF BUSINESS
The accompanying financial statements represent the consolidated accounts of Iron Mountain Incorporated, a Delaware 
corporation ("IMI"), and its subsidiaries ("we" or "us"). 
IMI was founded in an underground facility near Hudson, New York in 1951 where it stored business records. Today, we are a 
global leader in information management services, and we are trusted by more than 240,000 customers in 61 countries, including 
approximately 95% of the Fortune 1000, to help unlock value and intelligence from their assets through services that transcend the 
physical and digital worlds. Our broad range of solutions address their information management, digital transformation, information 
security, data center and asset lifecycle management (“ALM”) needs. Our longstanding commitment to safety, security, 
sustainability and innovation in support of our customers underpins everything we do. We currently serve customers across an 
array of market verticals — commercial, legal, financial, healthcare, technology, insurance, life sciences, energy, business services, 
entertainment and government organizations. 
We have been organized and have operated as a real estate investment trust for United States federal income tax purposes 
("REIT") beginning with our taxable year ended December 31, 2014.
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
A. PRINCIPLES OF CONSOLIDATION
The accompanying financial statements reflect our financial position, results of operations, comprehensive income (loss), (deficit) 
equity and cash flows on a consolidated basis. The accompanying financial statements include the results of those entities over 
which we have a controlling financial interest or of which we are deemed to be the primary beneficiary. All intercompany 
transactions and account balances have been eliminated.
B. USE OF ESTIMATES
The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 
("GAAP") requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, 
revenues and expenses, and the related disclosure of contingent assets and liabilities at the date of the financial statements and 
for the period then ended. On an ongoing basis, we evaluate the estimates used. We base our estimates on historical experience, 
actuarial estimates, current conditions and various other assumptions that we believe to be reasonable under the circumstances. 
These estimates form the basis for making judgments about the carrying values of assets and liabilities and are not readily 
apparent from other sources. Actual results may differ from these estimates.
C. CHANGES IN PRESENTATION
Certain items previously reported under specific captions within the statement of cash flows and Note 10 have been reclassified to 
conform to the current year presentation.
D. FOREIGN CURRENCY
Local currencies are the functional currencies for our operations outside the United States, with the exception of certain foreign 
holding companies, whose functional currency is the United States dollar. In those instances where the local currency is the 
functional currency, assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated 
at average exchange rates for the applicable period. See Note 2.r.
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Part IV
IRON MOUNTAIN INCORPORATED
72
IRON MOUNTAIN 2024 FORM 10-K

E. CASH AND CASH EQUIVALENTS
Cash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining 
maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair 
value.
F. ALLOWANCE FOR DOUBTFUL ACCOUNTS AND CREDIT MEMO RESERVES
We maintain an allowance for doubtful accounts and a credit memo reserve for estimated losses resulting from the potential 
inability of our customers to make required payments and potential disputes regarding billing and service issues. We evaluate and 
monitor the collectability of accounts receivable based on a combination of factors, including historical loss experience, 
assessments of trends in our aged receivables and credit memo activity, the location of our businesses, the composition of our 
customer base, our product and service lines, potential future macroeconomic factors, including natural disasters, and reasonable 
and supportable forecasts for expected future collectability of our outstanding receivables. Continued adjustments will be made, as 
it becomes evident, should there be any material change to reasonable and supportable forecasts that may impact our likelihood of 
collection. Our highly diverse global customer base, with no single customer accounting for more than approximately 1% of 
revenue during the years ended December 31, 2024, 2023 and 2022, limits our exposure to concentration of credit risk. 
Additionally, we write off uncollectible balances as circumstances warrant, generally no later than one year past due.
The rollforward of the allowance for doubtful accounts and credit memo reserves is as follows:
YEAR ENDED DECEMBER 31,
BALANCE AT
BEGINNING OF
THE YEAR
CREDIT MEMOS
CHARGED TO
REVENUE
ALLOWANCE FOR
BAD DEBTS CHARGED
TO EXPENSE
DEDUCTIONS
AND OTHER(1)
BALANCE AT
END OF
THE YEAR
2024
$ 
74,762 
$ 
104,130 
$ 
45,123 
$ 
(137,303) $ 
86,712 
2023
 
54,143 
 
92,881 
 
32,692 
 
(104,954)  
74,762 
2022
 
62,009 
 
62,891 
 
13,666 
 
(84,423)  
54,143 
(1) Primarily consists of the issuance of credit memos, the write-off of accounts receivable and the impact associated with currency translation adjustments.
G. CONCENTRATIONS OF CREDIT RISK
Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money 
market funds and time deposits) and accounts receivable. We had no significant concentrations of liquid investments as of 
December 31, 2024 and 2023. As per our risk management investment policy, we limit exposure to concentration of credit risk by 
limiting the amount invested in any one mutual fund to a maximum of 1% of the fund's total assets or in any one financial institution 
to a maximum of $75,000. See Note 2.p.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
73

H. PREPAID EXPENSES AND ACCRUED EXPENSES
Prepaid expenses totaled $131,615 and $126,904 as of December 31, 2024 and 2023, respectively. There were no other items 
greater than 5% of total current assets included within Prepaid expenses and other as of December 31, 2024 and 2023.
Accrued expenses and other current liabilities with items greater than 5% of total current liabilities are shown separately and 
consist of the following:
 
DECEMBER 31,
DESCRIPTION
2024
2023
Current portion of operating lease liabilities
$ 
315,400 
$ 
291,795 
Accrued compensation and benefits
 
244,499 
 
242,992 
Dividends
 
222,649 
 
202,392 
Interest
 
164,336 
 
175,218 
Deferred purchase obligations, purchase price holdbacks and other
 
137,207 
 
171,273 
Other
 
282,477 
 
166,589 
Accrued expenses and other current liabilities
$ 
1,366,568 
$ 
1,250,259 
I. PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in 
years):
DESCRIPTION
RANGE
Buildings, building improvements and data center infrastructure
5 to 40
Leasehold improvements
5 to 20 or life of the lease (whichever is shorter)
Racking structures
1 to 20 or life of the lease (whichever is shorter)
Warehouse equipment/vehicles
1 to 10
Furniture and fixtures
1 to 10
Computer hardware and software
2 to 7
Property, plant and equipment (including financing leases in the respective categories), at cost, consist of the following:
 
DECEMBER 31,
DESCRIPTION
2024
2023
Land
$ 
670,529 
$ 
536,780 
Buildings, building improvements and data center infrastructure
 
4,768,835 
 
3,819,241 
Leasehold improvements
 
1,536,919 
 
1,166,810 
Racking structures
 
1,978,923 
 
2,054,046 
Warehouse equipment/vehicles
 
644,340 
 
526,965 
Furniture and fixtures
 
45,918 
 
46,094 
Computer hardware and software
 
751,627 
 
601,273 
Construction in progress
 
1,588,906 
 
1,622,780 
Property, plant and equipment
$ 
11,985,997 
$ 
10,373,989 
Minor maintenance costs are expensed as incurred. Major improvements which (i) extend the life, (ii) increase the capacity or 
functionality or (iii) improve the safety or the efficiency of property owned are capitalized and depreciated. Major improvements to 
leased buildings are capitalized as leasehold improvements and depreciated.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
74
IRON MOUNTAIN 2024 FORM 10-K

CAPITALIZED INTEREST
We capitalize interest expense during the active construction period of major capital projects. Capitalized interest is added to the 
cost of the underlying assets and is amortized over the useful lives of the assets. During the years ended December 31, 2024, 
2023 and 2022, capitalized interest is as follows: 
YEAR ENDED DECEMBER 31,
2024
2023
2022
Capitalized interest
$ 
63,333 
$ 
44,845 
$ 
14,078 
INTERNAL USE SOFTWARE
We develop various software applications for internal use. Computer software costs associated with internal use software are 
expensed as incurred until certain capitalization criteria are met. Third party consulting costs, as well as payroll and related costs 
for employees directly associated with, and devoting time to, the development of internal use computer software projects (to the 
extent time is spent directly on the project) are capitalized. Capitalization of costs, including costs incurred for upgrades and 
enhancements that provide additional functionality to our existing software, generally begins during the application development 
stage of the project, which occurs after it is probable that the project will be completed and used to perform the function intended. 
Capitalization ends when the asset is ready for its intended use. Capitalized internal use software costs are depreciated on a 
straight-line basis over the expected useful life of the software, commencing when the software is ready for its intended use. 
Computer software costs that are capitalized are periodically evaluated for impairment.
During the years ended December 31, 2024, 2023 and 2022, capitalized costs associated with the development of internal use 
computer software projects are as follows:
YEAR ENDED DECEMBER 31,
2024
2023
2022
Capitalized costs associated with the development of internal use computer software 
projects
$ 
69,055 
$ 
64,488 
$ 
44,152 
ASSET RETIREMENT OBLIGATIONS
Entities are required to record the fair value of a liability for an asset retirement obligation in the period in which it is incurred. Asset 
retirement obligations represent the costs to replace or remove tangible long-lived assets required by law, regulatory rule or 
contractual agreement. Our asset retirement obligations are primarily the result of requirements under our facility lease agreements 
which generally have "return to original condition" clauses which would require us to remove or restore items such as shred pits, 
vaults, demising walls and office build-outs, among others. The significant assumptions used in estimating our aggregate asset 
retirement obligations are the timing of removals, the probability of a requirement to perform, estimated cost and associated 
expected inflation rates that are consistent with historical rates and credit-adjusted risk-free rates that approximate our incremental 
borrowing rate. Our asset retirement obligations at December 31, 2024 and 2023 were $43,844 and $36,602, respectively, and are 
included in Other Long-term Liabilities in our Consolidated Balance Sheets.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
75

J. LEASES
We lease facilities for certain warehouses, data centers and office spaces. We also have land leases, including those on which 
certain facilities are located. The majority of our leased facilities are classified as operating leases that, on average, have initial 
lease terms of five to 10 years, with one or more lease renewal options to extend the lease term. Our lease renewal option terms 
generally range from one to five years. The exercise of the lease renewal option is at our sole discretion and may contain fixed 
rent, fair market value based rent or Consumer Price Index rent escalation clauses. We include option periods in the lease term 
when our failure to renew the lease would result in an economic disincentive, thereby making it reasonably certain that we will 
renew the lease. We recognize straight line rental expense over the life of the lease and any fair market value or Consumer Price 
Index rent escalations are recognized as variable lease expense in the period in which the obligation is incurred. In addition, we 
lease certain vehicles and equipment. Vehicle and equipment leases typically have lease terms ranging from one to seven years. 
We account for all leases, both operating and financing, in accordance with Accounting Standards Codification ("ASC") Topic 842, 
Leases ("ASC 842"). Our accounting policy provides that leases with an initial term of 12 months or less will not be included within 
the lease right-of-use assets and lease liabilities recognized on our Consolidated Balance Sheets. We recognize the lease 
payments for those leases with an initial term of 12 months or less in our Consolidated Statements of Operations on a straight-line 
basis over the lease term.
The lease right-of-use assets and related lease liabilities are classified as either operating or financing. Lease right-of-use assets 
are calculated as the net present value of future payments plus any capitalized initial direct costs less any tenant improvements or 
lease incentives. Lease liabilities are calculated as the net present value of future payments. In calculating the present value of the 
lease payments, we utilize the rate stated in the lease (in the limited circumstances when such rate is explicitly stated) or, if no rate 
is explicitly stated, we utilize a rate that reflects our securitized incremental borrowing rate by geography for the lease term. We 
account for nonlease components (which include common area maintenance, taxes, and insurance) with the related lease 
component. Any variable nonlease components are not included within the lease right-of-use asset and lease liability on our 
Consolidated Balance Sheets, and instead, are reflected as an expense in the period incurred.
Operating and financing lease right-of-use assets and lease liabilities as of December 31, 2024 and 2023 are as follows:
 
DECEMBER 31,
DESCRIPTION
2024
2023
Assets:
Operating lease right-of-use assets(1)
$ 
2,489,893 
$ 
2,696,024 
Financing lease right-of-use assets, net of accumulated depreciation(2)(3)
 
359,265 
 
304,600 
Liabilities:
Current
Operating lease liabilities
$ 
315,400 
$ 
291,795 
Financing lease liabilities(3)
 
128,397 
 
39,089 
Long-term
Operating lease liabilities
$ 
2,334,826 
$ 
2,562,394 
Financing lease liabilities(3)
 
278,444 
 
310,776 
(1)
At December 31, 2024 and 2023, these assets are comprised of approximately 99% real estate related assets (which include land, buildings, data center 
infrastructure and racking structures) and 1% non-real estate related assets (which include warehouse equipment, vehicles, furniture and fixtures and computer 
hardware and software).
(2)
At December 31, 2024, these assets are comprised of approximately 58% real estate related assets and 42% non-real estate related assets. At December 31, 
2023, these assets are comprised of approximately 68% real estate related assets and 32% non-real estate related assets.
(3)
Financing lease right-of-use assets, current financing lease liabilities and long-term financing lease liabilities are included within Property, Plant and Equipment, Net, 
Current portion of long-term debt and Long-term Debt, net of current portion, respectively, within our Consolidated Balance Sheets.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
76
IRON MOUNTAIN 2024 FORM 10-K

The components of the lease expense for the years ended December 31, 2024, 2023 and 2022 are as follows:
YEAR ENDED DECEMBER 31,
DESCRIPTION
2024
2023
2022
Operating lease cost(1)
$ 
682,960 
$ 
660,889 
$ 
574,115 
Financing lease cost:
Depreciation of financing lease right-of-use assets
$ 
50,548 
$ 
42,089 
$ 
42,708 
Interest expense for financing lease liabilities
 
21,949 
 
18,638 
 
17,329 
(1)
Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $163,916, $142,154 and $119,184 for the years ended 
December 31, 2024, 2023 and 2022, respectively. 
Weighted average remaining lease terms and discount rates as of December 31, 2024 and 2023 are as follows:
DECEMBER 31, 2024
DECEMBER 31, 2023
OPERATING LEASES
FINANCING LEASES
OPERATING LEASES
FINANCING LEASES
Remaining Lease Term
9.9 years
7.8 years
10.6 years
9.2 years
Discount Rate
 6.8 %
 6.3 %
 6.6 %
 6.1 %
The estimated minimum future lease payments (receipts) as of December 31, 2024 are as follows: 
YEAR
OPERATING LEASES(1)
SUBLEASE INCOME
FINANCING LEASES(1)
2025
$ 
479,248 
$ 
(5,471) $ 
143,971 
2026
 
447,698 
 
(3,469)  
55,849 
2027
 
409,142 
 
(2,980)  
45,534 
2028
 
364,352 
 
(2,135)  
81,501 
2029
 
327,061 
 
(1,331)  
33,958 
Thereafter
 
1,669,671 
 
(1,402)  
125,841 
Total minimum lease payments (receipts)
 
3,697,172 
$ 
(16,788)  
486,654 
Less amounts representing interest or imputed interest
 
1,046,946 
 
79,813 
Present value of lease obligations
$ 
2,650,226 
$ 
406,841 
(1)
Estimated minimum future lease payments exclude variable common area maintenance charges, insurance and taxes. 
Other information: Supplemental cash flow information relating to our leases for the years ended December 31, 2024, 2023 and 
2022 is as follows:
YEAR ENDED DECEMBER 31,
CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE 
LIABILITIES:
2024
2023
2022
Operating cash flows used in operating leases
$ 
473,474 
$ 
450,412 
$ 
409,163 
Operating cash flows used in financing leases (interest)
 
21,949 
 
18,638 
 
17,329 
Financing cash flows used in financing leases
 
54,366 
 
52,284 
 
44,869 
NON-CASH ITEMS:
Operating lease modifications and reassessments
$ 
29,345 
$ 
86,948 
$ 
179,094 
New operating leases (including acquisitions and sale-leaseback 
transactions) 
 
118,813 
 
306,479 
 
540,830 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
77

K. LONG-LIVED ASSETS
We review long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such 
assets may not be recoverable. Recoverability of these assets is determined by comparing the sum of the forecasted undiscounted 
net cash flows of the operation to which the assets relate to their carrying amount. The operations are generally distinguished by 
the business segment and geographic region in which they operate. If it is determined that we are unable to recover the carrying 
amount of the assets, the long-lived assets are written down, on a pro rata basis, to fair value. Fair value is determined based on 
discounted cash flows or appraised values, depending upon the nature of the assets. Long-lived assets, including finite-lived 
intangible assets, are amortized over their useful lives. Annually, or more frequently if events or circumstances warrant, we assess 
whether a change in the lives over which long-lived assets, including finite-lived intangible assets, are amortized is necessary.
Loss (gain) on disposal/write-down of property, plant and equipment, net for the years ended December 31, 2024, 2023 and 2022 
is as follows:
YEAR ENDED DECEMBER 31,
2024
2023
2022
Loss (gain) on 
disposal/write-down of 
property, plant and 
equipment, net
$ 
6,196 $ 
(12,825) $ 
(93,268) 
Primarily consists of(1):
•
Losses related to the disposal 
of assets associated with 
facility consolidations.
•
Gains associated with sale and 
sale-leaseback transactions of 
approximately $19,500, of which 
approximately $18,500 relates to a 
sale-leaseback transaction of a 
facility in Singapore during the first 
quarter of 2023. These gains are 
partially offset by losses related to 
the disposal of assets associated 
with facility consolidations.
•
Gains associated with sale and sale-
leaseback transactions of approximately 
$94,500, of which (i) approximately 
$49,000 relates to sale and sale-
leaseback transactions of 11 facilities and 
parcels of land in the United States during 
the second quarter of 2022, (ii) 
approximately $17,000 relates to sale-
leaseback transactions of two facilities in 
the United States and one in Canada 
during the third quarter of 2022 and (iii) 
approximately $28,500 relates to sale and 
sale-leaseback transactions of 12 facilities 
and one parcel of land in the United States 
and one facility in the United Kingdom 
during the fourth quarter of 2022.
(1)   The gains recognized during the years ended December 31, 2023 and 2022 are the result of our program to monetize a small portion of our industrial assets through 
sale and sale-leaseback transactions. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in Note 2.j.
L. GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS
Goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment, or more frequently if 
impairment indicators arise. Other than goodwill, we currently have no intangible assets that have indefinite lives and which are not 
amortized.
We test goodwill annually on October 1, and more frequently if impairment indicators arise that would require an interim test. We 
have performed our annual goodwill impairment review as of October 1, 2024, 2023 and 2022. We concluded that as of October 1, 
2024, 2023 and 2022, goodwill was not impaired.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
78
IRON MOUNTAIN 2024 FORM 10-K

REPORTING UNITS AS OF OCTOBER 1, 2023
Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2023 were as follows: 
•
North America Records and Information Management ("North 
America RIM")
•
Europe Records and Information Management ("Europe RIM")
•
Middle East, North Africa, South Africa and Turkey Information 
Management ("MENATSA RIM")
•
Latin America Records and Information Management ("Latin 
America RIM")
•
Asia Pacific Records and Information Management ("APAC RIM")
•
Entertainment Services
•
Global Data Center
•
Fine Arts
•
ALM
There were no changes to the composition of our reporting units between October 1, 2023 and December 31, 2023.
GOODWILL BY REPORTING UNIT AS OF DECEMBER 31, 2023
The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2023 is as follows: 
SEGMENT
REPORTING UNIT
CARRYING VALUE AS OF DECEMBER 31, 2023
Global RIM Business
North America RIM
$ 
2,694,093 
Europe RIM
 
541,860 
MENATSA RIM
 
26,502 
Latin America RIM
 
120,119 
APAC RIM
 
496,944 
Entertainment Services
 
32,427 
Global Data Center Business
Global Data Center
 
478,930 
Corporate and Other
Fine Arts
 
47,535 
ALM
 
579,502 
Total
$ 
5,017,912 
2024 REPORTING UNIT CHANGES
During 2024, as a result of the realignment of our global managerial structure, we reassessed the composition of our reporting 
units. The realignment of our global managerial structure did not change the composition of our reportable segments (as described 
and defined in Note 11). As a result of the reassessment, our businesses that were previously managed under our former 
MENATSA RIM reporting unit are now managed as part of our "Europe RIM" reporting unit. Additionally, our former Entertainment 
Services reporting unit is now referred to as "Media and Archive Services" to more accurately reflect the offerings of this business. 
There were no changes to our other reporting units.
REPORTING UNITS AS OF OCTOBER 1, 2024
Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2024 were as follows:
•
North America RIM
•
Europe RIM
•
Latin America RIM
•
APAC RIM
•
Media and Archive Services
•
Global Data Center
•
Fine Arts
•
ALM
There were no changes to the composition of our reporting units between October 1, 2024 and December 31, 2024.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
79

GOODWILL BY REPORTING UNIT AS OF DECEMBER 31, 2024
The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2024 is as follows: 
SEGMENT
REPORTING UNIT
CARRYING VALUE AS OF DECEMBER 31, 2024
Global RIM Business
North America RIM
$ 
2,675,999 
Europe RIM
 
542,521 
Latin America RIM
 
99,599 
APAC RIM
 
467,059 
Media and Archive Services
 
31,696 
Global Data Center Business
Global Data Center
 
469,461 
Corporate and Other
Fine Arts
 
47,925 
ALM
 
749,557 
Total
$ 
5,083,817 
The fair value of our reporting units has generally been determined using a combined approach based on the present value of 
future cash flows (the "Discounted Cash Flow Model") and market multiples (the "Market Approach"). 
The Discounted Cash Flow Model incorporates significant 
assumptions including future revenue growth rates, 
operating margins, discount rates and capital expenditures. 
The Market Approach requires us to make assumptions 
related to Adjusted EBITDA (as defined in Note 11) 
multiples. 
Changes in economic and operating conditions impacting these assumptions or changes in multiples could result in goodwill 
impairments in future periods. In conjunction with our annual goodwill impairment reviews, we reconcile the sum of the valuations 
of all of our reporting units to our market capitalization as of such dates.
The changes in the carrying value of goodwill attributable to each reportable segment for the years ended December 31, 2024 and 
2023 are as follows:
 
GLOBAL RIM 
BUSINESS 
GLOBAL
DATA 
CENTER
BUSINESS
CORPORATE 
AND OTHER 
TOTAL
CONSOLIDATED
Goodwill balance, net of accumulated amortization, as of December 31, 
2022
$ 
3,852,946 
$ 
418,502 
$ 
611,286 
$ 
4,882,734 
Tax deductible goodwill acquired during the year
 
— 
 
— 
 
11,928 
 
11,928 
Non-tax deductible goodwill acquired during the year
 
21,594 
 
56,674 
 
383 
 
78,651 
Fair value and other adjustments
 
(80)  
— 
 
2,333 
 
2,253 
Currency effects
 
37,485 
 
3,754 
 
1,107 
 
42,346 
Goodwill balance, net of accumulated amortization, as of December 31, 
2023
 
3,911,945 
 
478,930 
 
627,037 
 
5,017,912 
Tax deductible goodwill acquired during the year
 
— 
 
— 
 
132,891 
 
132,891 
Non-tax deductible goodwill acquired during the year
 
— 
 
— 
 
39,646 
 
39,646 
Fair value and other adjustments
 
372 
 
(186)  
(186)  
— 
Currency effects
 
(95,443)  
(9,283)  
(1,906)  
(106,632) 
Goodwill balance, net of accumulated amortization, as of December 31, 
2024
$ 
3,816,874 
$ 
469,461 
$ 
797,482 
$ 
5,083,817 
Accumulated Goodwill Impairment Balance as of December 31, 2023
$ 
132,409 
$ 
— 
$ 
26,011 
$ 
158,420 
Accumulated Goodwill Impairment Balance as of December 31, 2024
$ 
132,409 
$ 
— 
$ 
26,011 
$ 
158,420 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
80
IRON MOUNTAIN 2024 FORM 10-K

M. FINITE-LIVED INTANGIBLE ASSETS AND LIABILITIES
I. CUSTOMER AND SUPPLIER RELATIONSHIP INTANGIBLE ASSETS
Customer and supplier relationship intangible assets, which are acquired through either business combinations or acquisitions of 
customer relationships, are generally amortized over periods ranging from 10 to 30 years. Customer and supplier relationship 
intangible assets are recorded based upon estimates of their fair value.
II. CUSTOMER INDUCEMENTS
Payments that are made to a customer in order to terminate the customer’s storage of records with its current records management 
vendor ("Permanent Withdrawal Fees"), or direct payments to a customer for which no distinct benefit is received in return, are 
collectively referred to as "Customer Inducements". Customer Inducements are treated as a reduction of the transaction price over 
the associated contract terms, which range from one to 10 years, and are included in storage and service revenue in the 
accompanying Consolidated Statements of Operations. If the customer terminates its relationship with us, the unamortized carrying 
value of the Customer Inducement intangible asset is charged to revenue. However, in the event of such termination, we generally 
collect, and record as revenue, Permanent Withdrawal Fees that generally equal or exceed the amount of the unamortized 
Customer Inducement intangible asset. 
III. DATA CENTER INTANGIBLE ASSETS AND LIABILITIES
Finite-lived intangible assets associated with our Global Data Center Business consist of the following:
DATA CENTER IN-PLACE LEASE INTANGIBLE ASSETS AND DATA CENTER TENANT RELATIONSHIP INTANGIBLE 
ASSETS
Data center in-place lease intangible assets ("Data Center In-Place Leases") and data center tenant relationship intangible assets 
("Data Center Tenant Relationships") reflect the value associated with acquiring a data center operation with active tenants as of 
the date of acquisition. The value of Data Center In-Place Leases is determined based upon an estimate of the economic costs 
(such as lost revenues, tenant improvement costs, commissions, legal expenses and other costs to acquire new data center 
leases) avoided by acquiring a data center operation with active tenants. Data Center In-Place Leases are amortized over the 
weighted average remaining term of the acquired data center leases. The value of Data Center Tenant Relationships is determined 
based upon an estimate of the economic costs avoided upon lease renewal of the acquired tenants, based upon expectations of 
lease renewal. Data Center Tenant Relationships are amortized over the weighted average remaining anticipated life of the 
relationship with the acquired tenant.
DATA CENTER ABOVE-MARKET AND BELOW-MARKET IN-PLACE LEASE INTANGIBLE ASSETS
Data center above-market in-place lease intangible assets ("Data Center Above-Market Leases") and data center below-market in-
place lease intangible assets ("Data Center Below-Market Leases") are recorded at the net present value of the difference between 
(i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of the fair market lease rates 
for each corresponding in-place lease. Data Center Above-Market Leases and Data Center Below-Market Leases are amortized 
over the remaining non-cancellable term of the acquired in-place lease to storage revenue.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
81

The gross carrying amount and accumulated amortization of our finite-lived intangible assets as of December 31, 2024 and 2023, 
respectively, are as follows:
DECEMBER 31, 2024
DECEMBER 31, 2023
DESCRIPTION
GROSS 
CARRYING 
AMOUNT
ACCUMULATED 
AMORTIZATION
NET 
CARRYING 
AMOUNT
GROSS 
CARRYING 
AMOUNT
ACCUMULATED 
AMORTIZATION
NET 
CARRYING 
AMOUNT
Assets:
Customer and supplier relationship intangible 
assets(1)
$ 2,268,949 $ 
(1,035,846) $ 1,233,103 
$ 2,144,641 $ 
(933,084) $ 1,211,557 
Customer inducements(1)
 
38,782  
(19,706)  
19,076 
 
47,565  
(25,562)  
22,003 
Data center lease-based intangible assets(1)(2)  
138,714  
(116,162)  
22,552 
 
141,628  
(95,422)  
46,206 
Third-party commissions asset and other(3)
 
86,314  
(51,508)  
34,806 
 
77,638  
(39,323)  
38,315 
Liabilities:
Data center below-market leases(4)
$ 
10,819 $ 
(7,275) $ 
3,544 
$ 
10,873 $ 
(5,772) $ 
5,101 
(1) Included in Customer and supplier relationship and other intangible assets in the accompanying Consolidated Balance Sheets.
(2) Data center lease-based intangible assets includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases.
(3) Included in Other (within Other Assets, Net) in the accompanying Consolidated Balance Sheets.
(4) Included in Other long-term liabilities in the accompanying Consolidated Balance Sheets.
Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Customer 
Inducements and net revenue reduction associated with the amortization of Data Center Above-Market Leases and Data Center 
Below-Market Leases for the years ended December 31, 2024, 2023 and 2022 is as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Amortization expense included in depreciation and amortization associated with:
 
 
 
Customer and supplier relationship intangible assets
$ 
155,872 
$ 
153,128 
$ 
156,779 
Data center in-place leases and tenant relationships
 
22,304 
 
22,322 
 
16,955 
Third-party commissions asset and other
 
16,478 
 
12,541 
 
16,148 
Revenue reduction associated with amortization of:
 
 
 
Customer inducements and data center above-market and below-market leases
$ 
5,347 
$ 
7,036 
$ 
8,119 
Estimated amortization expense for existing finite-lived intangible assets (excluding Contract Costs, as defined in Note 2.s.) is as 
follows:
 
ESTIMATED AMORTIZATION
YEAR
INCLUDED IN DEPRECIATION 
AND AMORTIZATION
REVENUE REDUCTION ASSOCIATED WITH 
CUSTOMER INDUCEMENTS 
AND DATA CENTER ABOVE-MARKET AND
BELOW-MARKET LEASES
2025
$ 
178,310 
$ 
4,493 
2026
 
150,079 
 
3,887 
2027
 
131,057 
 
2,838 
2028
 
121,642 
 
1,400 
2029
 
107,935 
 
1,114 
Thereafter
 
601,323 
 
1,915 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
82
IRON MOUNTAIN 2024 FORM 10-K

N. DEFERRED FINANCING COSTS
Deferred financing costs are amortized over the life of the related debt. If debt is retired early, the related unamortized deferred 
financing costs are written off in the period the debt is retired and included as a component of Other expense (income), net. See 
Note 7.
O. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Derivative instruments are measured at fair value and are recorded as either assets or liabilities in our Consolidated Balance 
Sheets. Periodically, we acquire derivative instruments that are intended to hedge either cash flows or values that are subject to 
foreign exchange or other market price risk and not for trading purposes. We have formally documented our hedging relationships, 
including identification of the hedging instruments and the hedged items, as well as our risk management objectives and strategies 
for undertaking each hedge transaction concurrently with the execution of the derivative instrument. Given the recurring nature of 
our revenues and the long-term nature of our asset base, we have the ability and the preference to use long-term, fixed interest 
rate debt to finance our business, thereby preserving our long-term returns on invested capital. We may use interest rate swaps as 
a tool to maintain our targeted level of fixed rate debt. In addition, we may enter into cross-currency swaps to hedge the variability 
of exchange rates between the United States dollar and the currencies of our foreign subsidiaries, as well as interest rates. We 
may also use borrowings in foreign currencies, either obtained in the United States or by our foreign subsidiaries, to hedge foreign 
currency risk associated with our international investments. Gains and losses realized as a result of the maturing or termination of 
our interest rate swaps and cross-currency swaps are reflected as operating cash flows within our Consolidated Statements of 
Cash Flows. As of December 31, 2024 and 2023, none of our derivative instruments contained credit-risk related contingent 
features. See Note 6.
P. FAIR VALUE MEASUREMENTS
Entities are permitted under GAAP to elect to measure certain financial instruments and certain other items at either fair value or 
cost. We have elected the cost measurement option in all circumstances where we had an option. 
Our financial assets or liabilities that are carried at fair value are required to be measured using inputs from the three levels of the 
fair value hierarchy. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input 
that is significant to the fair value measurement. The three levels of the fair value hierarchy are as follows:
Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that we have the ability to access at 
the measurement date.
Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets 
or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest 
rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or 
other means (market corroborated inputs).
Level 3—Unobservable inputs that reflect our assumptions about the assumptions that market participants would use in pricing the 
asset or liability. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
83

The assets and liabilities carried at fair value and measured on a recurring basis as of December 31, 2024 and 2023, respectively, 
are as follows:
 
 
FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2024 USING
DESCRIPTION
TOTAL CARRYING 
VALUE AT 
DECEMBER 31, 2024
QUOTED PRICES IN 
ACTIVE MARKETS 
(LEVEL 1) 
 
SIGNIFICANT OTHER 
OBSERVABLE INPUTS 
(LEVEL 2) 
 
SIGNIFICANT 
UNOBSERVABLE 
INPUTS 
(LEVEL 3)(6)
Money Market Funds(1)
$ 
2,488 
$ 
— 
$ 
2,488 
$ 
— 
Time Deposits(1)
 
9,612 
 
— 
 
9,612 
 
— 
Trading Securities
 
8,144 
 
6,390 (2)  
1,754 (3)  
— 
Derivative Assets(4)
 
28,092 
 
— 
 
28,092 
 
— 
Derivative Liabilities(4)
 
5,326 
 
— 
 
5,326 
 
— 
Deferred Purchase Obligations(5)
 
147,055 
 
— 
 
— 
 
147,055 
 
 
FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2023 USING
DESCRIPTION
TOTAL CARRYING 
VALUE AT 
DECEMBER 31, 2023
QUOTED PRICES IN 
ACTIVE MARKETS 
(LEVEL 1) 
 
SIGNIFICANT OTHER 
OBSERVABLE INPUTS 
(LEVEL 2) 
 
SIGNIFICANT 
UNOBSERVABLE 
INPUTS 
(LEVEL 3)(6)
Money Market Funds(1)
$ 
66,008 
$ 
— 
$ 
66,008 
$ 
— 
Time Deposits(1)
 
15,913 
 
— 
 
15,913 
 
— 
Trading Securities
 
9,952 
 
6,149 (2)  
3,803 (3)  
— 
Derivative Assets(4)
 
6,359 
 
— 
 
6,359 
 
— 
Derivative Liabilities(4)
 
5,769 
 
— 
 
5,769 
 
— 
Deferred Purchase Obligations(5)
 
208,265 
 
— 
 
— 
 
208,265 
(1) Money market funds and time deposits are measured based on quoted prices for similar assets and/or subsequent transactions.
(2) Certain trading securities are measured at fair value using quoted market prices.
(3) Certain trading securities are measured based on inputs other than quoted market prices that are observable.
(4) Derivative assets and liabilities include (i) interest rate swap agreements, and (ii) cross-currency swap agreements to hedge the variability of exchange rate impacts 
between the United States dollar and certain of our foreign functional currencies, including the Euro and the Canadian dollar. Our derivative financial instruments are 
measured using industry standard valuation models using market-based observable inputs, including interest rate curves, forward and spot prices for currencies and 
implied volatilities. See Note 6 for additional information on our derivative financial instruments.
(5) Primarily relates to the fair values of the deferred purchase obligations associated with the ITRenew Transaction and the Regency Transaction (each as defined in 
Note 3).
(6) The following is a rollforward of the Level 3 liabilities presented above for December 31, 2023 through December 31, 2024:
Balance as of December 31, 2023
$ 
208,265 
Additions
 
63,700 
Payments
 
(158,775) 
Other changes
 
33,865 
Balance as of December 31, 2024
$ 
147,055 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
84
IRON MOUNTAIN 2024 FORM 10-K

The level 3 valuations of the deferred purchase obligations were determined utilizing Monte-Carlo models and take into account our 
forecasted projections as they relate to the underlying performance of the respective businesses. The Monte-Carlo simulation 
model applied in assessing the fair value of the deferred purchase obligation associated with the ITRenew Transaction incorporates 
assumptions as to expected gross profits over the achievement period, including adjustments for the volatility of timing and amount 
of the associated revenue and costs, as well as discount rates that account for the risk of the arrangement and overall market risks. 
The Monte-Carlo simulation model applied in assessing the fair value of the deferred purchase obligation associated with the 
Regency Transaction incorporates assumptions as to expected revenue over the achievement period, including adjustments for 
volatility and timing, as well as discount rates that account for the risk of the arrangement and overall market risks. Any material 
change to these assumptions may result in a significantly higher or lower fair value of the related deferred purchase obligation.
There were no material items that were measured at fair value on a non-recurring basis for the years ended December 31, 2024 
and 2023 other than (i) the reporting units as presented in our goodwill impairment analysis (as disclosed in Note 2.l.); (ii) assets 
acquired and liabilities assumed through our acquisitions (as disclosed in Note 3); (iii) the redemption value of recently acquired 
noncontrolling interests and previously held equity interests (both as disclosed in Note 3); (iv) contributions to our equity method 
investments; and (v) the fair value of our retained investment of our deconsolidated businesses (as described in Note 4), all of 
which are based on Level 3 inputs.
The fair value of our long-term debt, which was determined based on Level 2 and Level 3 inputs, is disclosed in Note 7. Long-term 
debt is measured at cost in our Consolidated Balance Sheets as of December 31, 2024 and 2023. 
Q. NONCONTROLLING INTERESTS
Unaffiliated third parties own noncontrolling interests in certain of our consolidated subsidiaries. The classification of these 
ownership interests are evaluated under ASC 810, Consolidation and ASC 480, Distinguishing Liabilities from Equity. Ownership 
interests are classified as equity unless the underlying agreements contain provisions requiring classification as a liability or 
temporary equity. Noncontrolling interests are presented as a separate component of Iron Mountain's Stockholders’ (Deficit) Equity 
in the accompanying Consolidated Balance Sheets and Consolidated Statements of (Deficit) Equity. 
Certain agreements with our noncontrolling interest shareholders contain put options which allow the noncontrolling interest 
shareholders to require us to purchase their respective interests in such subsidiaries at certain times and at purchase prices as 
stipulated in the underlying agreements (generally at fair value). These ownership interests, otherwise known as redeemable 
noncontrolling interests, are classified as temporary equity in our Consolidated Balance Sheets and Consolidated Statements of 
(Deficit) Equity. Redeemable noncontrolling interests are reported as temporary equity at the greater of their redemption value or 
the noncontrolling interest holders’ proportionate share of the underlying subsidiary’s net carrying value. Increases or decreases in 
the redemption value are offset against Additional Paid-in Capital. Changes in ownership interests that do not result in a loss of 
control are accounted for as equity transactions. If control is lost, the subsidiary’s assets, liabilities and noncontrolling interests are 
derecognized, and any resulting gain or loss is recorded in earnings.
The amount of consolidated net income attributable to noncontrolling interests, including redeemable noncontrolling interests, are 
presented in the accompanying Consolidated Statements of Operations and Consolidated Statements of Comprehensive Income 
(Loss).
When ownership interests are determined to be mandatorily redeemable, they are classified as liabilities and included as a 
component of Accrued expenses and other current liabilities or Other long-term liabilities on our Consolidated Balance Sheets, 
depending on the timing of the obligation.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
85

R. ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET
The changes in Accumulated other comprehensive items, net for the years ended December 31, 2024, 2023 and 2022 are as 
follows:
 
FOREIGN 
CURRENCY
 TRANSLATION 
AND
OTHER 
ADJUSTMENTS
CHANGE IN FAIR 
VALUE OF 
DERIVATIVE
INSTRUMENTS
TOTAL
Balance as of December 31, 2021
$ 
(341,024) $ 
2,677 
$ 
(338,347) 
Other comprehensive (loss) income:
Foreign currency translation and other adjustments
 
(113,485)  
— 
 
(113,485) 
Change in fair value of derivative instruments
 
— 
 
9,829 
 
9,829 
Total other comprehensive (loss) income
 
(113,485)  
9,829 
 
(103,656) 
Balance as of December 31, 2022
 
(454,509)  
12,506 
 
(442,003) 
Other comprehensive income (loss):
Foreign currency translation and other adjustments
 
80,881 
 
— 
 
80,881 
Change in fair value of derivative instruments
 
— 
 
(2,454)  
(2,454) 
Reclassifications from Accumulated Other Comprehensive Items, net
 
— 
 
(7,580)  
(7,580) 
Total other comprehensive income (loss)
 
80,881 
 
(10,034)  
70,847 
Balance as of December 31, 2023
 
(373,628)  
2,472 
 
(371,156) 
Other comprehensive (loss) income:
Foreign currency translation and other adjustments
 
(194,501)  
— 
 
(194,501) 
Change in fair value of derivative instruments
 
— 
 
(1,767)  
(1,767) 
Reclassifications from Accumulated Other Comprehensive Items, net
 
— 
 
(2,528)  
(2,528) 
Total other comprehensive (loss) income 
 
(194,501)  
(4,295)  
(198,796) 
Balance as of December 31, 2024
$ 
(568,129) $ 
(1,823) $ 
(569,952) 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
86
IRON MOUNTAIN 2024 FORM 10-K

S. REVENUES
Our revenues consist of storage rental revenues and service revenues and are reflected net of sales and value-added taxes. 
Storage rental revenues, which are considered a key driver of financial performance for the storage and information management 
services industry, consist primarily of recurring periodic rental charges related to the storage of materials or data (generally on a per 
unit basis) that are typically retained by customers for many years and of revenues associated with our data center operations. 
Service revenues include charges for related service activities, the most significant of which include: (1) the handling of records, 
including the addition of new records, temporary removal of records from storage, refiling of removed records, customer termination 
and permanent withdrawal fees, project revenues and courier operations consisting primarily of the pickup and delivery of records 
upon customer request; (2) secure shredding of sensitive documents and the subsequent sale of shredded paper for recycling, the 
price of which can fluctuate from period to period; (3) the decommissioning, data erasure, processing and disposition, and recycling 
or sale of information technology ("IT") hardware and component assets; (4) digital solutions, including the scanning, imaging and 
document conversion services of active and inactive records, consulting services and the sale of software as a service; and (5) 
data center services, including set up, monitoring and support of our customers' assets which are protected in our data center 
facilities, and special project services, including data center fitout. 
We account for our revenue in accordance with ASC 606, Revenue from Contracts with Customers ("ASC 606"), with the exception 
of our data center storage revenue, as described below. Customers are generally billed monthly based on contractually agreed-
upon terms, and storage rental and service revenues are recognized in the month the respective storage rental or service is 
provided, in line with the transfer of control to the customer. When storage rental fees or services are billed in advance, amounts 
related to future storage rental or prepaid service contracts are accounted for as deferred revenue and recognized upon the 
transfer of control to the customer, generally ratably over the contract term. Customer contracts generally include promises to 
provide monthly recurring storage and related services that are essentially the same over time and have the same pattern of 
transfer of control to the customer; therefore, most performance obligations represent a promise to deliver a series of distinct 
services over time (as determined for purposes of ASC 606, a "series"). For those contracts that qualify as a series, we apply the 
"right to invoice" practical expedient as we have a right to consideration from the customer in an amount that corresponds directly 
with the value of the underlying performance obligation transferred to the customer to date. Additionally, each purchasing decision 
is fully in the control of the customer; therefore, consideration beyond the current reporting period is variable and allocated to the 
specific period to which the consideration relates, which is consistent with the practical expedient. Revenue from product sales, the 
significant majority of which are shred paper and IT asset sales, is recognized at the point in time at which control transfers to the 
customer, which is generally upon shipment.
Our Global Data Center Business features storage rental provided to the customer at contractually specified rates over a fixed 
contractual period. The revenue related to the storage component of our Global Data Center Business is recognized on a straight-
line basis over the contract term in accordance with ASC 842. The revenue related to the service component of our Global Data 
Center Business is recognized in the period the related services are provided.
From time to time, we make payments to entities that are also customers under a revenue contract. These payments are primarily 
comprised of (i) Customer Inducements and (ii) payments to customers of our ALM business under revenue sharing arrangements 
for the remarketing of the customer's disposed IT assets. Customer Inducements do not represent payments for a distinct service, 
and, as such, are treated as a reduction of the transaction price over periods ranging from one to 10 years. Payments for disposed 
IT assets are for a distinct good and, as such, are expensed as cost of sales in the period when the asset is sold and the 
corresponding revenue is recognized.
Certain costs to fulfill or obtain customer contracts and certain initial direct costs of obtaining data center leases, including the costs 
associated with the initial movement of customer records into physical storage and certain commission expenses, are collectively 
referred to as "Contract Costs". The following describes our significant Contract Costs:
INTAKE COSTS (AND ASSOCIATED DEFERRED REVENUE)
The costs of the initial intake of customer records into physical storage ("Intake Costs") are deferred and amortized as a 
component of depreciation and amortization in our Consolidated Statements of Operations generally over three years, consistent 
with the transfer of the performance obligation to the customer to which the asset relates. In instances where such Intake Costs are 
billed to the customer, the associated revenue is deferred and recognized over the same three-year period. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
87

COMMISSIONS
Certain commission payments that are directly associated with obtaining long-term contracts are capitalized and amortized as a 
component of depreciation and amortization in our Consolidated Statements of Operations generally over three years, consistent 
with the transfer of the performance obligation to the customer to which the asset relates. We also apply the practical expedient to 
expense certain commission payments as incurred when the amortization period for those commission payments is one year or 
less.
Contract Costs, which are included as a component of Other within Other Assets, Net as of December 31, 2024 and 2023 are as 
follows: 
DECEMBER 31, 2024
DECEMBER 31, 2023
DESCRIPTION
GROSS
CARRYING
AMOUNT
ACCUMULATED
AMORTIZATION
NET
CARRYING
AMOUNT
GROSS
CARRYING
AMOUNT
ACCUMULATED
AMORTIZATION
NET 
CARRYING 
AMOUNT
Intake Costs asset
$ 
89,057 
$ 
(43,783) $ 
45,274 
$ 
76,150 
$ 
(39,617) $ 
36,533 
Commissions asset
 
200,149 
 
(78,955)  
121,194 
 
156,639 
 
(64,279)  
92,360 
Amortization expense associated with the Intake Costs and Commissions assets for the years ended December 31, 2024, 2023 
and 2022 are as follows:
YEAR ENDED DECEMBER 31,
DESCRIPTION
2024
2023
2022
Intake Costs asset
$ 
22,114 
$ 
18,904 
$ 
18,117 
Commissions asset
 
54,841 
 
43,413 
 
40,612 
Estimated amortization expense for Contract Costs is as follows:
YEAR
ESTIMATED AMORTIZATION
2025
$ 
85,924 
2026
 
56,997 
2027
 
23,547 
Deferred revenue liabilities, which also include deferred revenues primarily related to contracts within our Global Data Center 
Business accounted for under ASC 842 (as described below), are reflected as follows in our Consolidated Balance Sheets: 
DECEMBER 31,
DESCRIPTION
LOCATION IN BALANCE SHEET
2024
2023(1)
Deferred revenue - Current(2)
Deferred revenue
$ 
326,882 
$ 
325,665 
Deferred revenue - Long-term(3)
Other Long-term Liabilities
 
110,601 
 
100,770 
(1) The beginning balance of current and long-term deferred revenue for the year ended December 31, 2023 was $328,910 and $32,960, respectively.
(2) The current deferred revenue accounted for under ASC 842 is approximately $25,500 and $44,200 as of December 31, 2024 and 2023, respectively.
(3) The long-term deferred revenue accounted for under ASC 842 is approximately $95,000 and $70,900 as of December 31, 2024 and 2023, respectively.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
88
IRON MOUNTAIN 2024 FORM 10-K

DATA CENTER LESSOR CONSIDERATIONS
Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed 
contractual period. Our data center revenue contracts are accounted for in accordance with ASC 842. ASC 842 provides a practical 
expedient which allows lessors to account for nonlease components with the related lease component if both the timing and pattern 
of transfer are the same for nonlease components and the lease component, and the lease component, if accounted for separately, 
would be classified as an operating lease. The single combined component is accounted for under ASC 842 if the lease component 
is the predominant component and is accounted for under ASC 606 if the nonlease components are the predominant components. 
We have elected to take this practical expedient. Our data center revenue contracts may contain Consumer Price Index rent 
escalation clauses. Consumer Price Index rent escalation clauses are considered variable lease payments and are recognized as 
income in the period earned.
Storage rental revenue associated with our Global Data Center Business for the years ended December 31, 2024, 2023 and 2022 
are as follows:
YEAR ENDED DECEMBER 31,
2024
2023
2022
Storage rental revenue
$ 
606,294 
$ 
474,066 
$ 
372,208 
The revenue related to the service component of our Global Data Center Business is recognized in the period the related services 
are provided.
The future minimum lease payments we expect to receive under non-cancellable data center operating leases for which we are the 
lessor, excluding month to month leases, for the next five years and thereafter are as follows:
YEAR
FUTURE MINIMUM LEASE 
PAYMENTS(1)
2025
$ 
479,296 
2026
 
433,670 
2027
 
429,431 
2028
 
399,736 
2029
 
366,612 
Thereafter
 
2,300,334 
(1) Future minimum lease payments we expect to receive exclude contingent and variable costs such as taxes, insurance and common area maintenance, which are 
included in our total storage revenue. These amounts also exclude $1,745,958 in total expected future minimum lease payments for non-cancellable leases that have 
not yet commenced, which we expect to receive over a weighed average period of 15 years.
T. STOCK-BASED COMPENSATION
We record stock-based compensation expense, utilizing the straight-line method, for the cost of stock options, restricted stock units 
("RSUs"), and performance units ("PUs") (together, "Employee Stock-Based Awards"). Forfeitures are recorded in the period during 
which they occur. Our non-employee directors are considered employees for purposes of our Employee Stock-Based Awards and 
the associated reporting of these awards.
Our equity compensation plans generally provide that, upon a vesting change in control (as defined in each plan), any unvested 
options and other awards granted thereunder shall vest immediately if an employee is terminated as a result of the change in 
control or terminates their own employment for good reason (as defined in each plan). Other than in specified circumstances, no 
equity-based award will vest before the first anniversary of the date of grant.
On January 20, 2015, our stockholders approved the adoption of the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan, as amended (the "2014 Plan"). The 2014 Plan permits us to continue to grant awards through May 12, 2031.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
89

A total of 20,750,000 shares of common stock have been reserved for grants of options and other rights under our various stock 
incentive plans, including the 2014 Plan. The number of shares available for grant under our various stock incentive plans at 
December 31, 2024 was 4,984,132.
RETIREMENT ELIGIBLE CRITERIA
Our Employee Stock-Based Awards include the following retirement provision:
•
Upon an employee’s retirement on or after attaining age 55 with at least five years of service, if the sum of (i) the award 
recipient’s age at retirement and (ii) the award recipient’s years of service with us totals at least 65, the award recipient is entitled 
to continued vesting of any outstanding Employee Stock-Based Awards, provided that their retirement occurs on or after a 
minimum of six months from the grant date (the "Retirement Criteria").
•
Accordingly, (i) grants of Employee Stock-Based Awards to an employee who has met the Retirement Criteria on or before the 
date of grant, or will meet the Retirement Criteria before the six month anniversary in the year of the grant, will be expensed over 
six months from the date of grant and (ii) grants of Employee Stock-Based Awards to employees who will meet the Retirement 
Criteria during the award’s normal vesting period will be expensed between the date of grant and the date upon which the award 
recipient meets the Retirement Criteria.
•
Stock options and RSUs granted to award recipients who meet the Retirement Criteria will be delivered to the award recipient 
based upon the original vesting schedule. If an award recipient retires and has met the Retirement Criteria, stock options will 
remain exercisable until the original expiration date of the stock options. PUs granted to award recipients who meet the 
Retirement Criteria will be delivered in accordance with the original vesting schedule of the applicable PU award and remain 
subject to the same performance conditions.
Stock-based compensation expense for Employee Stock-Based Awards included in Selling, general and administrative expenses in 
the accompanying Consolidated Statements of Operations for the years ended December 31, 2024, 2023 and 2022 is as follows: 
YEAR ENDED DECEMBER 31,
2024
2023
2022
Stock-based compensation expense
$ 
118,138 
$ 
73,799 
$ 
56,861 
Stock-based compensation expense, after tax
 
109,252 
 
68,309 
 
52,600 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
90
IRON MOUNTAIN 2024 FORM 10-K

STOCK OPTIONS
Options are generally granted with exercise prices equal to the market price of the stock on the date of grant; however, in certain 
instances, options are granted at exercise prices greater than the market price of the stock on the date of grant. We issue options 
that become exercisable ratably over a period of three years from the date of grant and have a contractual life of 10 years from the 
date of grant, unless the holder’s employment is terminated sooner. Dividends and dividend equivalents are not paid with respect to 
stock options.
The fair value of stock options granted in 2024, 2023 and 2022 was $22.58, $10.98 and $7.44 per share, respectively. These 
values were estimated on the date of grant using the Black-Scholes option pricing model. The assumptions used for stock option 
grants in the years ended December 31, 2024, 2023 and 2022 are as follows:
YEAR ENDED DECEMBER 31,
STOCK OPTION GRANT ASSUMPTIONS
2024
2023
2022
Expected volatility(1)
 28.6 %
 29.1 %
 28.0 %
Risk-free interest rate(2)
 4.25 %
 3.92 %
 1.72 %
Expected dividend yield(3)
 3.2 %
 4.7 %
 5.0 %
Expected life(4)
10.0 years
10.0 years
10.0 years
(1) Expected volatility is calculated utilizing daily historical volatility over a period that equates to the expected life of the option. 
(2) Risk-free interest rate is based on the United States Treasury interest rates whose term is consistent with the expected life (estimated period of time outstanding) of 
the stock options. 
(3) Expected dividend yield is considered in the option pricing model and represents our annualized expected per share dividends over the trade price of our common 
stock at the date of grant. 
(4) Expected life of the stock options granted is estimated using the historical exercise behavior of employees.
A summary of stock option activity for the year ended December 31, 2024 is as follows:
 
OPTIONS
WEIGHTED
AVERAGE
EXERCISE 
PRICE
WEIGHTED AVERAGE
REMAINING
CONTRACTUAL
TERM (YEARS)
AGGREGATE
INTRINSIC
VALUE
Outstanding at December 31, 2023
 
4,060,597 
$ 
37.84 
Granted
 
83,054 
 
81.03 
Exercised
 
(433,732)  
45.95 
Outstanding at December 31, 2024
 
3,709,919 
$ 
37.85 
3.89
$ 
249,538 
Options exercisable at December 31, 2024
 
3,451,625 
$ 
36.12 
3.57
$ 
238,128 
Options expected to vest
 
258,294 
$ 
60.93 
8.22
$ 
11,410 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
91

RESTRICTED STOCK UNITS
Our RSUs generally have a vesting period of three years from the date of grant. However, RSUs granted to our non-employee 
directors vest immediately upon grant. All RSUs accrue dividend equivalents associated with the underlying stock as we declare 
dividends. Dividends will generally be paid to holders of RSUs in cash upon the vesting date of the associated RSU and will be 
forfeited if the RSU does not vest. The fair value of RSUs is the excess of the market price of our common stock at the date of 
grant over the holder's purchase price (which is typically zero).
The fair value of RSUs vested during the years ended December 31, 2024, 2023 and 2022 are as follows:
 
YEAR ENDED DECEMBER 31,
2024
2023
2022
Fair value of RSUs vested
$ 
29,852 
$ 
32,664 
$ 
27,078 
A summary of RSU activity for the year ended December 31, 2024 is as follows:
 
RSUs
WEIGHTED-AVERAGE
GRANT-DATE FAIR VALUE
Non-vested at December 31, 2023
 
1,360,264 
$ 
50.24 
Granted
 
712,061 
 
83.78 
Vested
 
(647,901)  
46.07 
Forfeited
 
(230,049)  
62.87 
Non-vested at December 31, 2024
 
1,194,375 
$ 
70.06 
PERFORMANCE UNITS
The PUs we issue vest based on our performance against predefined operational performance and relative total shareholder return 
based targets over a three-year performance period. The vesting is subject to a minimum level of return on invested capital in the 
third year of the performance period, and the number of PUs earned is based on certain metrics determined at the outset of the 
performance period.
The number of PUs earned is based on:
•
either (i) the revenue performance for each year averaged at the end of the three-year performance period, or (ii) if (a) absolute 
Company total shareholder return is positive at the end of the three-year performance period and (b) a predetermined revenue 
hurdle is achieved in the third year of the performance period, then the revenue performance achieved in the third year of the 
performance period; and
•
the total return on our common stock relative to the companies comprising the Morgan Stanley Capital International ("MSCI") 
United States REIT Index.
The number of PUs earned will range from 0% to approximately 350% of the initial award.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
92
IRON MOUNTAIN 2024 FORM 10-K

All of our PUs will be settled in shares of our common stock and are subject to cliff vesting three years from the date of the original 
PU grant. As detailed above, PUs granted are subject to the Retirement Criteria. PUs are generally expensed over the three-year 
performance period, unless they are granted to a recipient who meets the Retirement Criteria, for which expense will be recognized 
as described above. PUs granted to recipients who meet the Retirement Criteria will continue to vest and be delivered in 
accordance with the original vesting schedule of the applicable PU award and remain subject to the same performance conditions.
All PUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid 
to holders of PUs in cash upon the settlement date of the associated PU and will be forfeited if the PU does not vest.
During the years ended December 31, 2024, 2023 and 2022, we issued 462,501, 641,412 and 435,675 PUs, respectively. We 
forecast the likelihood of achieving the predefined targets for our PUs in order to calculate the expected PUs to be earned. We 
record a compensation charge based on either the forecasted PUs to be earned (during the performance period) or the actual PUs 
earned (at the three-year anniversary of the grant date) over the vesting period for each of the awards. The fair value of PUs based 
on our performance against predefined targets is the excess of the market price of our common stock at the date of grant over the 
purchase price (which is typically zero). For PUs earned based on a market condition, we utilize a Monte Carlo simulation to 
estimate the fair value of these awards at the date of grant.
The fair value of earned PUs that vested during the years ended December 31, 2024, 2023 and 2022 is as follows:
 
YEAR ENDED DECEMBER 31,
2024
2023
2022
Fair value of earned PUs that vested
$ 
24,617 
$ 
34,896 
$ 
20,059 
A summary of PU activity for the year ended December 31, 2024 is as follows:
 
ORIGINAL
PU AWARDS
PU
ADJUSTMENT(1)
TOTAL PU
AWARDS
WEIGHTED-AVERAGE
GRANT-DATE
FAIR VALUE
Non-vested at December 31, 2023
 
804,910 
 
(323,557)  
481,353 
$ 
43.16 
Granted
 
462,501 
 
— 
 
462,501 
 
92.01 
Prior year grant adjustments for performance(1)
 
— 
 
273,653 
 
273,653 
 
52.33 
Vested
 
(574,225)  
— 
 
(574,225)  
42.87 
Forfeited
 
(81,254)  
— 
 
(81,254)  
76.29 
Non-vested at December 31, 2024
 
611,932 
 
(49,904)  
562,028 
$ 
83.33 
(1) Represents an increase or decrease in the number of original PUs awarded based on either the final performance criteria or market condition achievement at the end 
of the performance period of such PUs.
EMPLOYEE STOCK PURCHASE PLAN
We offer an Employee Stock Purchase Plan ("ESPP") in which participation is available to substantially all United States and 
Canadian employees who meet certain service eligibility requirements. Shares of our common stock may be purchased by eligible 
employees at six-month intervals at 95% of the fair market price at the end of each six-month period, without a look-back feature, 
up to a maximum of 15% of their gross compensation during the offering period. We do not recognize compensation expense for 
the ESPP shares purchased. The number of shares of Common Stock authorized for issuance under our ESPP is 2,000,000. For 
the years ended December 31, 2024, 2023 and 2022, there were 82,244, 120,647 and 112,486 shares, respectively, purchased 
under the ESPP. As of December 31, 2024, we have 788,613 shares available under the ESPP.
As of December 31, 2024, unrecognized compensation cost related to the unvested portion of our Employee Stock-Based Awards, 
inclusive of our estimated achievement of the performance metrics, was $77,627 and is expected to be recognized over a 
weighted-average period of 1.9 years.
We issue shares of our common stock for the exercises of stock options, and the vesting of RSUs, PUs and shares of our common 
stock under our ESPP from unissued reserved shares.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
93

U. ACQUISITION AND INTEGRATION COSTS
Acquisition and integration costs represent operating expenditures directly associated with the closing and integration activities of 
our business acquisitions that have closed, or are highly probable of closing, and include (i) advisory, legal and professional fees to 
complete business acquisitions and (ii) costs to integrate acquired businesses into our existing operations, including move, 
severance and system integration costs (collectively, "Acquisition and Integration Costs"). Acquisition and integration costs for the 
years ended December 31, 2024, 2023 and 2022 were $35,842, $25,875 and $47,746, respectively.
V. OTHER EXPENSE (INCOME), NET
Other expense (income), net for the years ended December 31, 2024, 2023 and 2022 consists of the following:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Foreign currency transaction (gains) losses, net(1)
$ 
(39,064) $ 
36,799 
$ 
(61,684) 
Debt extinguishment expense
 
5,678 
 
— 
 
671 
Other, net(2)(3)(4)
 
76,808 
 
71,841 
 
(8,768) 
Other expense (income), net
$ 
43,422 
$ 
108,640 
$ 
(69,781) 
(1) The gain or loss on foreign currency transactions, calculated as the difference between the historical exchange rate and the exchange rate at the applicable 
measurement date, includes gains or losses primarily related to (i) certain foreign currency denominated intercompany obligations of our foreign subsidiaries to us 
and between our foreign subsidiaries, which are not considered permanently invested, and (ii) borrowings in certain foreign currencies under the Revolving Credit 
Facility (as defined in Note 7).
(2) Other, net for the year ended December 31, 2024 primarily consists of (i) a loss of approximately $41,000 due to the change in value of our deferred purchase 
obligations and other deferred payments, (ii) approximately $29,200 in charges associated with the agreement to purchase the remaining interest in the Web Werks 
JV (as defined and discussed in Note 3) and (iii) losses on our equity method investments.
(3) Other, net for the year ended December 31, 2023 consists primarily of a loss of approximately $38,000 associated with the remeasurement to fair value of our 
previously held equity interest in the Clutter JV (as defined and discussed in Note 3), as well as losses on our equity method investments and the change in value of 
our deferred purchase obligations.
(4) Other, net for the year ended December 31, 2022 consists primarily of (i) a gain of approximately $93,600 associated with the remeasurement of the deferred 
purchase obligation associated with the ITRenew Transaction to the present value of our best estimate of fair value and (ii) a gain of approximately $35,800 
associated with the Clutter Transaction (as defined in Note 3), partially offset by (iii) a loss of approximately $105,800 associated with the OSG Deconsolidation (as 
defined in Note 4) and (iv) losses on our equity method investments.
W. INCOME TAXES
Accounting for income taxes requires the recognition of deferred tax assets and liabilities for the expected future tax consequences 
of temporary differences between the tax and financial reporting bases of assets and liabilities and for loss and credit 
carryforwards. Valuation allowances are provided when recovery of deferred tax assets does not meet the more likely than not 
standard as defined in GAAP. We have elected to recognize interest and penalties associated with uncertain tax positions as a 
component of the Provision (benefit) for income taxes in the accompanying Consolidated Statements of Operations.
X. INCOME (LOSS) PER SHARE—BASIC AND DILUTED
Basic income (loss) per common share is calculated by dividing income (loss) by the weighted average number of common shares 
outstanding. The calculation of diluted income (loss) per share is consistent with that of basic income (loss) per share but gives 
effect to all potential common shares (that is, securities such as stock options, RSUs, PUs, warrants or convertible securities) that 
were outstanding during the period, unless the effect is antidilutive. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
94
IRON MOUNTAIN 2024 FORM 10-K

The calculation of basic and diluted income (loss) per share for the years ended December 31, 2024, 2023 and 2022 is as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Net Income (Loss)
$ 
183,666 
$ 
187,263 
$ 
562,149 
Less: Net Income (Loss) Attributable to Noncontrolling Interests
 
3,510 
 
3,029 
 
5,168 
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator 
of Earnings Per Share calculation)
$ 
180,156 
$ 
184,234 
$ 
556,981 
Weighted-average shares—basic
 
293,365,000 
 
291,936,000 
 
290,812,000 
Effect of dilutive potential stock options
 
2,241,000 
 
1,435,000 
 
1,125,068 
Effect of dilutive potential RSUs and PUs
 
628,000 
 
594,000 
 
507,109 
Weighted-average shares—diluted
 
296,234,000 
 
293,965,000 
 
292,444,177 
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
 
 
 
Basic
$ 
0.61 
$ 
0.63 
$ 
1.92 
Diluted
$ 
0.61 
$ 
0.63 
$ 
1.90 
Antidilutive stock options, RSUs and PUs, excluded from the calculation
 
225,847 
 
81,817 
 
305,527 
Y. NEW ACCOUNTING PRONOUNCEMENTS
RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS
In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 
2023-07, Improvements to Reportable Segments Disclosures ("ASU 2023-07") to provide more detail in the disclosures for 
reportable segments. The main provisions of ASU 2023-07 requires (i) enhanced disclosures about significant segment expenses, 
(ii) extension of certain annual disclosures to interim periods and (iii) certain qualitative information on the chief operating decision 
maker. We adopted ASU 2023-07 on January 1, 2024 on a retrospective basis. The required disclosures are included in Note 11.
In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) ("ASU 2020-04"). ASU 2020-04 provides 
optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions, for a limited 
period of time, to ease the potential burden of recognizing the effects of reference rate reform on financial reporting. The 
amendments in ASU 2020-04 apply to contracts, hedging relationships and other transactions that reference the London Inter-Bank 
Offered Rate ("LIBOR") or another reference rate expected to be discontinued due to the global transition away from LIBOR and 
certain other interbank offered rates. Under ASU 2020-04, an entity could elect to apply the amendments beginning March 12, 
2020 through December 31, 2022. In December 2022, the FASB issued ASU No. 2022-06, Reference Rate Reform (Topic 848), 
Deferral of the Sunset Date of Topic 848 ("ASU 2022-06") to defer the sunset date of Topic 848 from December 31, 2022 to 
December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. We adopted the guidance in 
these updates on January 1, 2024, and there was no material impact on our consolidated financial statements.
OTHER AS YET ADOPTED ACCOUNTING PRONOUNCEMENTS
In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures 
("ASU 2023-09") to provide disaggregated income tax disclosures on the rate reconciliation and income taxes paid. Further, certain 
requirements related to uncertain tax positions and unrecognized deferred tax liabilities are eliminated. The amendments in this 
update should be applied on a prospective basis, with retrospective application permitted. ASU 2023-09 will be effective for us on 
January 1, 2025, with early adoption permitted. We do not expect ASU 2023-09 to have a material impact on our consolidated 
financial statements. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
95

In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense 
Disaggregation Disclosures (Subtopic 220-40), Disaggregation of Income Statement Expenses ("ASU 2024-03"), which requires 
disclosure of additional information about specific expense categories in the notes to financial statements on an annual and interim 
basis. The amendments in this update should be applied on a prospective basis, with retrospective application permitted. The 
amendments in this update are effective for annual reporting periods beginning after December 15, 2026, and interim reporting 
periods beginning after December 15, 2027, with early adoption permitted. We do not expect ASU 2024-03 to have a material 
impact on our consolidated financial statements. 
3. ACQUISITIONS
We account for acquisitions using the acquisition method of accounting, and, accordingly, the assets and liabilities acquired are 
recorded at their estimated fair values and the results of operations for each acquisition have been included in our consolidated 
results from their respective acquisition dates. 
A. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2024
REGENCY TECHNOLOGIES
On January 3, 2024, in order to expand our ALM business, we acquired 100% of RSR Partners, LLC (doing business as Regency 
Technologies), an IT asset disposition services provider with operations throughout the United States, for an initial purchase price 
of approximately $200,000, subject to certain working capital adjustments at, and subsequent to, the closing, with $125,000 paid at 
closing, funded by borrowings under the Revolving Credit Facility, and the remaining $75,000 (the "January 2025 Payment"), paid 
in January 2025 (the "Regency Transaction"). The present value of the January 2025 Payment is included as a component of 
Accrued expenses and other current liabilities in our Consolidated Balance Sheet at December 31, 2024. The agreement for the 
Regency Transaction also includes a performance-based contingent consideration with a potential earnout range from zero to 
$200,000 based upon achievement of certain three-year cumulative revenue targets, which would be payable in 2027, if earned. 
The preliminary fair value estimate of this deferred purchase obligation as of the acquisition date was approximately $78,400. See 
Note 2.p. for details on the methodology used to establish the fair value. The fair value of the deferred purchase obligation is 
included as a component of Other long-term liabilities in our Consolidated Balance Sheet at December 31, 2024. Subsequent 
increases or decreases in the fair value estimate of the deferred purchase obligation, as well as the accretion of the discount to 
present value, is included as a component of Other expense (income), net in our Consolidated Statements of Operations until the 
deferred purchase obligation is settled or paid. Subsequent to the acquisition, the results of Regency Technologies are included as 
a component of Corporate and Other (as defined in Note 11).
B. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2023
WEB WERKS
On July 7, 2023, we made our final contractual investment in a joint venture with the shareholders of Web Werks India Private 
Limited (the "Web Werks JV") of approximately 3,750,000 Indian rupees (or approximately $45,300, based upon the exchange rate 
between the United States dollar and Indian rupee on the closing date of this investment). As a result of this transaction, our 
interest in the Web Werks JV increased to 63.39%, we assumed control of its board of directors and the financial results of the Web 
Werks JV are consolidated within our Global Data Center Business segment. We recognized noncontrolling interests of 
approximately $78,600 based upon the fair value attributable to these interests at the time of this transaction, of which 
approximately $18,100 of the noncontrolling interests were determined to be a current liability and included as a component of 
Accrued expenses and other current liabilities on our Consolidated Balance Sheet at December 31, 2023.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
96
IRON MOUNTAIN 2024 FORM 10-K

On July 1, 2024, we entered into an agreement with the minority shareholders of Web Werks India Private Limited to acquire the 
remaining approximately 36.61% interest in the Web Werks JV in two separate transactions. As a result of the agreement, during 
the third quarter of 2024, we recognized a charge of approximately $29,200, which is included as a component of Other expense 
(income), net in our Consolidated Statement of Operations for the year ended December 31, 2024. On July 5, 2024, we completed 
the acquisition of an approximately 8.55% interest in the Web Werks JV ("Tranche I") for approximately 3,000,000 Indian rupees (or 
approximately $35,000, based upon the exchange rate between the United States dollar and the Indian rupee on the closing date 
of Tranche I). Subsequent to the Tranche I payment, our ownership interest in the Web Werks JV is approximately 71.94%. In 
March 2025, we will be required to make an additional payment of approximately 9,600,000 Indian rupees (or approximately 
$112,200, based upon the exchange rate between the United States dollar and the Indian rupee as of December 31, 2024) to 
acquire the remaining approximately 28.06% interest in the Web Werks JV ("Tranche II"). As part of the Tranche II payment in 
March 2025, we may also make an incremental payment of approximately 1,000,000 Indian rupees (or approximately $11,700, 
based upon the exchange rate between the United States dollar and the Indian rupee as of December 31, 2024) (the "Incremental 
Payment") if certain infrastructure goals are achieved before December 31, 2024. We are currently assessing the achievement of 
these goals. The liability associated with Tranche II and our current estimate of the Incremental Payment is included within Accrued 
expenses and other current liabilities in our Consolidated Balance Sheet at December 31, 2024.
CLUTTER
In February 2022, the joint venture formed by MakeSpace Labs, Inc. and us (the "MakeSpace JV") entered into an agreement with 
Clutter, Inc. pursuant to which the equityholders of the MakeSpace JV contributed their ownership interests in the MakeSpace JV, 
and Clutter, Inc.’s shareholders contributed their ownership interests in Clutter, Inc., to create a newly formed venture (the "Clutter 
JV"). In exchange for our 49.99% interest in the MakeSpace JV, we received an approximately 27% interest in the Clutter JV (the 
"Clutter Transaction"). As a result of the Clutter Transaction, we recognized a gain related to our contributed interest in the 
MakeSpace JV of approximately $35,800, which was recorded to Other, net, a component of Other expense (income), net during 
the year ended December 31, 2022.
On June 29, 2023, in order to further expand our on-demand consumer storage business, we acquired 100% of the outstanding 
shares of Clutter Intermediate, Inc. and control of all assets of the Clutter JV (collectively, "Clutter") for total consideration of 
$60,600 (the "Clutter Acquisition"). Our previously held approximately 27% interest in the Clutter JV was remeasured to fair value 
at the closing date of the Clutter Acquisition. As a result, we recognized a loss of approximately $38,000 to Other, net, a component 
of Other expense (income), net, during the second quarter of 2023. The financial results of the Clutter JV are now consolidated 
within our Global RIM Business segment. In October 2023, we sold 15% of the equity interests in Clutter to certain former 
stakeholders of the Clutter JV for a total consideration of $7,500, which represents the fair value attributable to these interests, 
which is included as a component of Redeemable Noncontrolling Interests on our Consolidated Balance Sheet at December 31, 
2023.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
3. ACQUISITIONS (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
97

C. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2022
ITRENEW
On January 25, 2022, in order to expand our ALM operations, we acquired an approximately 80% interest in ITRenew at an agreed 
upon purchase price of $725,000, subject to certain working capital adjustments at, and subsequent to, the closing (the "ITRenew 
Transaction"). At closing, we paid $748,846 and acquired $30,720 of cash on hand, for a net purchase price of $718,126 for the 
ITRenew Transaction. The acquisition agreement includes a deferred purchase obligation that provides us the option to purchase, 
and provides the shareholders of ITRenew the option to sell, the remaining approximately 20% interest in ITRenew as follows: (i) 
approximately 16% on or after the second anniversary of the ITRenew Transaction and (ii) approximately 4% on or after the third 
anniversary of the ITRenew Transaction (collectively, the "Remaining Interests"). The total payments for the Remaining Interests, 
based on the achievement of certain targeted performance metrics, will be no less than $200,000 and no more than $531,000. 
From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. The current and long-
term portions of the deferred purchase obligation are reflected as components of Accrued expenses and other current liabilities and 
Other long-term liabilities, respectively, in our Consolidated Balance Sheet at December 31, 2023. The deferred purchase 
obligation is reflected as a component of Accrued expenses and other current liabilities in our Consolidated Balance Sheet at 
December 31, 2024. We have not reflected any non-controlling interests associated with the ITRenew Transaction as the 
Remaining Interests have non-substantive equity interest rights. Subsequent increases or decreases in the fair value estimate of 
the deferred purchase obligation are included as a component of Other expense (income), net in our Consolidated Statements of 
Operations until the deferred purchase obligation is settled or paid. See Note 2.v.
The unaudited consolidated pro forma financial information (the "Pro Forma Financial Information") below summarizes the 
combined results of Iron Mountain and ITRenew on a pro forma basis as if the ITRenew Transaction had occurred on January 1, 
2021. The Pro Forma Financial Information is presented for informational purposes and is not necessarily indicative of the results 
of operations that would have been achieved if the acquisition had taken place on January 1, 2021. The Pro Forma Financial 
Information, for the periods presented, includes purchase accounting adjustments (including amortization of acquired customer and 
supplier intangible assets and depreciation of acquired property, plant and equipment) and related tax effects. Through December 
31, 2022, we and ITRenew collectively incurred $59,370 of operating expenditures to complete the ITRenew Transaction (including 
advisory and professional fees). These operating expenditures have been reflected within the results of operations in the Pro 
Forma Financial Information as if they were incurred on January 1, 2021.
 
YEAR ENDED DECEMBER 31, 2022
Total Revenues
$ 
5,121,548 
Income from Continuing Operations
 
571,381 
In addition to our acquisition of ITRenew, we completed certain other acquisitions during the years ended December 31, 2024, 
2023 and 2022. The Pro Forma Financial Information does not reflect these acquisitions due to the insignificant impact of these 
acquisitions on our consolidated results of operations.
XDATA PROPERTIES
On October 5, 2022, in order to further expand our data center operations in Europe, we completed the acquisition of XData 
Properties S.L.U., a data center colocation space and solutions provider with a data center in Spain, which we accounted for as an 
asset acquisition, for (i) cash consideration of 78,900 Euros (or approximately $78,200, based upon the exchange rate between the 
Euro and the United States dollar on the closing date of this acquisition), subject to adjustments, and (ii) up to 10,000 Euros (or 
approximately $9,900, based upon the exchange rate between the Euro and the United States dollar on the closing date of this 
acquisition) of additional consideration, payable based on the achievement of certain power connection milestones through 
December 2024. In January 2025, a payment was made for the milestones that were achieved.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
3. ACQUISITIONS (CONTINUED)
98
IRON MOUNTAIN 2024 FORM 10-K

D. PURCHASE PRICE ALLOCATION
A summary of the cumulative consideration paid and the allocation of the purchase price paid for all of our acquisitions (including 
asset acquisitions) in each respective year is as follows:
2024
2023
2022
TOTAL
TOTAL
ITRENEW
OTHER FISCAL 
YEAR 2022 
ACQUISITIONS
TOTAL
Cash Paid (gross of cash acquired)(1)
$ 
185,882 
$ 
88,635 
$ 
749,596 
$ 
85,170 
$ 
834,766 
Fair Value of Noncontrolling Interests(2)
 
— 
 
78,598 
 
— 
 
— 
 
— 
Fair Value of Previously Held Equity Interest(2)
 
— 
 
99,718 
 
— 
 
— 
 
— 
Deferred Purchase Obligations, Purchase Price Holdbacks and 
Other(3)
 
134,638 
 
4,790 
 
275,100 
 
13,637 
 
288,737 
Settlement of Pre-Existing Relationships
 
— 
 
21,641 
 
— 
 
— 
 
— 
Total Consideration
 
320,520 
 
293,382 
 
1,024,696 
 
98,807 
 
1,123,503 
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash and Cash Equivalents
 
9,843 
 
49,716 
 
30,694 
 
963 
 
31,657 
Accounts Receivable, Prepaid Expenses and Other Assets
 
24,872 
 
36,274 
 
71,612 
 
3,947 
 
75,559 
Property, Plant and Equipment
 
12,320 
 
140,668 
 
7,541 
 
93,722 
 
101,263 
Customer and Supplier Relationship Intangible Assets(4)
 
131,463 
 
14,330 
 
487,600 
 
3,672 
 
491,272 
Other Intangible Assets
 
140 
 
8,046 
 
47,300 
 
1,442 
 
48,742 
Operating Lease Right-of-Use Assets
 
38,037 
 
29,046 
 
29,545 
 
3,135 
 
32,680 
Debt Assumed
 
— 
 
(22,413)  
— 
 
— 
 
— 
Accounts Payable, Accrued Expenses and Other Liabilities
 
(36,786)  
(19,323)  
(60,157)  
(2,069)  
(62,226) 
Operating Lease Liabilities
 
(26,925)  
(29,046)  
(29,545)  
(3,135)  
(32,680) 
Deferred Income Taxes
 
(4,981)  
(4,495)  
(100,922)  
(10,143)  
(111,065) 
Total Fair Value of Identifiable Net Assets Acquired
 
147,983 
 
202,803 
 
483,668 
 
91,534 
 
575,202 
Goodwill Initially Recorded
$ 
172,537 
$ 
90,579 
$ 
541,028 
$ 
7,273 
$ 
548,301 
(1) Cash paid for acquisitions, net of cash acquired in our Consolidated Statements of Cash Flows includes contingent and other payments of $2,375, $2,930 and $581 
for the years ended December 31, 2024, 2023 and 2022, respectively, related to acquisitions made in the years prior to 2024, 2023 and 2022, respectively.
(2) The fair values of the noncontrolling interests and the previously held equity interest were determined to be the respective interest’s proportionate share of the fair 
value of net assets acquired as of the acquisition date.
(3) In 2024, Deferred purchase obligations, purchase price holdbacks and other consists of the acquisition-date fair values of the deferred purchase obligation 
associated with the Regency Transaction and the January 2025 Payment. In 2022, Deferred purchase obligations, purchase price holdbacks and other includes 
$275,100 related to the original fair value estimate of the deferred purchase obligation for the Remaining Interests.
(4) The weighted average lives of customer and supplier relationship intangible assets associated with acquisitions in 2024, 2023 and 2022 were 20 years, four years 
and 12 years, respectively.
Allocations of the purchase price for acquisitions are based on estimates of the fair value of the net assets acquired and are subject 
to adjustment upon the finalization of the purchase price allocations. The accounting for business combinations requires estimates 
and judgments regarding expectations for future cash flows of the acquired business, and the allocations of those cash flows to 
identifiable tangible and intangible assets, in determining the assets acquired and liabilities assumed. The fair values assigned to 
tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s 
best estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary 
valuation procedures and techniques. The estimates and assumptions underlying the initial valuations are subject to the collection 
of information necessary to complete the valuations within the measurement periods, which are up to one year from the respective 
acquisition dates.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
3. ACQUISITIONS (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
99

As the valuation of certain assets and liabilities for purposes of purchase price allocations are preliminary in nature, they are 
subject to adjustment as additional information is obtained about the facts and circumstances regarding these assets and liabilities 
that existed at the acquisition date. The preliminary purchase price allocations that are not finalized as of December 31, 2024 relate 
to the final assessment of the fair values of property, plant and equipment and intangible assets associated with the acquisitions we 
closed during the year ended December 31, 2024. Any adjustments to our estimates of purchase price allocation will be made in 
the periods in which the adjustments are determined and the cumulative effect of such adjustments will be calculated as if the 
adjustments had been completed as of the acquisition dates. Purchase price allocation adjustments recorded during the fourth 
quarter of 2024 and year ended December 31, 2024 were not material to our balance sheet or results from operations.
4. DECONSOLIDATION
On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in our acquisition of OSG 
Records Management (Europe) Limited, excluding Ukraine (the "OSG Deconsolidation"). We recognized a loss of approximately 
$105,800 associated with the deconsolidation to Other expense (income), net in the first quarter of 2022 representing the 
difference between the net asset value prior to the deconsolidation and the subsequent remeasurement of the retained investment 
to a fair value of zero. We have concluded that the deconsolidation does not meet the criteria to be reported as discontinued 
operations in our consolidated financial statements, as it does not represent a strategic shift that will have a major effect on our 
operations and financial results.
5. INVESTMENTS
The following joint venture is accounted for as an equity method investment and is presented as a component of Other within Other 
assets, net in our Consolidated Balance Sheets. The carrying value and equity interest in our unconsolidated joint venture at 
December 31, 2024 and 2023 is as follows:
DECEMBER 31, 2024
DECEMBER 31, 2023
CARRYING 
VALUE
EQUITY 
INTEREST
CARRYING 
VALUE
EQUITY 
INTEREST
Joint venture with AGC Equity Partners (the "Frankfurt JV")
$ 
61,075 
 20.00 % $ 
57,874 
 20.00 %
6. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Derivative instruments we are party to include: (i) interest rate swap agreements (which are designated as cash flow hedges) and 
(ii) cross-currency swap agreements (which are designated as net investment hedges).
INTEREST RATE SWAP AGREEMENTS DESIGNATED AS CASH FLOW HEDGES
We utilize interest rate swap agreements designated as cash flow hedges to limit our exposure to changes in interest rates on a 
portion of our floating rate indebtedness. Certain of our interest rate swap agreements have notional amounts that will increase with 
the underlying hedged transaction. Under our interest rate swap agreements, we receive variable rate interest payments 
associated with the notional amount of each interest rate swap, based upon the one-month Secured Overnight Financing Rate (the 
"SOFR"), in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements. Our interest rate 
swap agreements are marked to market at the end of each reporting period, representing the fair values of the interest rate swap 
agreements, and any changes in fair value are recognized as a component of Accumulated other comprehensive items, net. 
Unrealized gains are recognized as assets, while unrealized losses are recognized as liabilities. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
3. ACQUISITIONS (CONTINUED)
100
IRON MOUNTAIN 2024 FORM 10-K

In April 2023, in anticipation of the discontinuance of the LIBOR reference rate on June 30, 2023, we terminated interest rate swap 
agreements with notional amounts totaling $350,000 that were indexed to the one-month LIBOR benchmark rate. The terminated 
swap agreements had associated unrealized gains at the termination date of approximately $10,100. These gains were included in 
Accumulated other comprehensive items, net and have been reclassified into earnings as reductions to interest expense from the 
termination date through March 2024, the original maturity date of these interest rate swap agreements.
As of December 31, 2024 and 2023, we have approximately $1,482,000 and $520,000, respectively, in notional value outstanding 
on our interest rate swap agreements. As of December 31, 2024, our interest rate swap agreements have maturity dates ranging 
from October 2025 through May 2027.
CROSS-CURRENCY SWAP AGREEMENTS DESIGNATED AS A HEDGE OF NET 
INVESTMENT
We utilize cross-currency interest rate swaps to hedge the variability of exchange rate impacts between the United States dollar 
and certain of our foreign functional currencies, including the Euro and the Canadian dollar. As of December 31, 2024, our cross-
currency interest rate swap agreements have maturity dates ranging from August 2025 through November 2026.
The notional values of our cross-currency interest rate swaps, by currency, as of December 31, 2024 and 2023 are as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
Euro
$ 
509,187 
$ 
509,187 
Canadian dollar
 
350,000 
 
— 
$ 
859,187 
$ 
509,187 
We have designated these cross-currency swap agreements as hedges of net investments in our Euro and Canadian dollar 
denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap 
agreements are marked to market at the end of each reporting period, representing the fair values of the cross-currency swap 
agreements, and any changes in fair value are recognized as a component of Accumulated other comprehensive items, net. 
Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The excluded component of our 
cross-currency swap agreements is recorded in Accumulated other comprehensive items, net and amortized to interest expense on 
a straight-line basis.
The fair value of derivative instruments recognized in our Consolidated Balance Sheets as of December 31, 2024 and 2023, by 
derivative instrument, are as follows:
Assets
Liabilities
Assets
Liabilities
Cash Flow Hedges(2)
 
 
Interest rate swap agreements
$ 
1,887 
$ 
(5,326) $ 
1,601 
$ 
(3,273) 
Net Investment Hedges(3)
Cross-currency swap agreements
 
26,205 
 
— 
 
4,758 
 
(2,496) 
DERIVATIVE INSTRUMENTS(1)
DECEMBER 31, 2024
DECEMBER 31, 2023
(1) Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net and our derivative liabilities are included as 
a component of (i) Accrued expenses and other current liabilities or (ii) Other long-term liabilities in our Consolidated Balance Sheets. As of December 31, 2024, 
$8,891 is include within Prepaid expenses and other, $19,201 is included within Other assets, and $5,326 is included within Other long-term liabilities. As of 
December 31, 2023, $6,359 is included within Other assets, $2,496 is included within Accrued expenses and other liabilities, and $3,273 is included within Other 
long-term liabilities.
(2) As of December 31, 2024, cumulative net gains recorded within Accumulated other comprehensive items, net associated with our interest rate swap agreements are 
$1,823.
(3) As of December 31, 2024, cumulative net gains recorded within Accumulated other comprehensive items, net associated with our cross-currency swap agreements 
are $73,107, which include $46,902 related to the excluded component of our cross-currency swap agreements.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
6. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
101

Unrealized (losses) gains recognized in Accumulated other comprehensive items, net during the years ending December 31, 2024, 
2023 and 2022, by derivative instrument, are as follows: 
YEAR ENDED DECEMBER 31,
DERIVATIVE INSTRUMENTS
2024
2023
2022
Cash Flow Hedges
Interest rate swap agreements
$ 
(1,767) $ 
(2,454) $ 
20,186 
Net Investment Hedges
Cross-currency swap agreements
 
23,943 
 
(41,382)  
28,044 
Cross-currency swap agreements (excluded component)
 
16,705 
 
21,097 
 
9,100 
Gains (losses) recognized in Net income during the years ending December 31, 2024, 2023 and 2022, by derivative instrument, 
are as follows:
YEAR ENDED DECEMBER 31,
DERIVATIVE INSTRUMENTS
Location of gain (loss)
2024
2023
2022
Cash Flow Hedges
Interest rate swap agreements
Interest expense
$ 
2,528 
$ 
7,580 
$ 
— 
Net Investment Hedges
Cross-currency swap agreements (excluded 
component)
Interest expense
 
(16,705)  
(21,097)  
(9,100) 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
6. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (CONTINUED)
102
IRON MOUNTAIN 2024 FORM 10-K

Long-term debt is as follows:
 
DECEMBER 31, 2024
DECEMBER 31, 2023
 
DEBT 
(INCLUSIVE OF 
DISCOUNT)
UNAMORTIZED 
DEFERRED 
FINANCING 
COSTS
CARRYING 
AMOUNT
FAIR
VALUE
DEBT 
(INCLUSIVE OF 
DISCOUNT)
UNAMORTIZED 
DEFERRED 
FINANCING 
COSTS
CARRYING 
AMOUNT
FAIR
VALUE
Revolving Credit Facility(1)
$ 
121,000 
$ 
(9,253) 
$ 
111,747 
$ 
121,000 
$ 
— 
$ 
(4,621) 
$ 
(4,621) 
$ 
— 
Term Loan A(1)
 
216,016 
 
— 
 
216,016 
 
216,016 
 
228,125 
 
— 
 
228,125 
 
228,125 
Term Loan B due 2026(1)(2)
 
— 
 
— 
 
— 
 
— 
 
659,298 
 
(2,498) 
 
656,800 
 
659,750 
Term Loan B due 2031(1)(3)
 
1,840,181 
 
(14,690) 
 
1,825,491 
 1,850,698 
 
1,191,000 
 
(13,026) 
 
1,177,974 
 1,200,000 
Virginia 3 Term Loans(4)
 
271,079 
 
(3,013) 
 
268,066 
 
271,079 
 
101,218 
 
(4,641) 
 
96,577 
 
101,218 
Virginia 4/5 Term Loans(4)
 
76,535 
 
(2,752) 
 
73,783 
 
76,535 
 
16,338 
 
(5,892) 
 
10,446 
 
16,338 
Virginia 6 Term Loans(4)
 
137,495 
 
(4,605) 
 
132,890 
 
137,495 
 
— 
 
— 
 
— 
 
— 
Virginia 7 Term Loans(4)
 
32,074 
 
(7,591) 
 
24,483 
 
32,074 
 
— 
 
— 
 
— 
 
— 
Australian Dollar Term Loan(4)(5)
 
175,813 
 
(265) 
 
175,548 
 
176,655 
 
197,743 
 
(482) 
 
197,261 
 
199,195 
UK Bilateral Revolving Credit 
Facility(4)
 
175,503 
 
(1,034) 
 
174,469 
 
175,503 
 
178,239 
 
— 
 
178,239 
 
178,239 
37/8% GBP Senior Notes due 2025 
(the "GBP Notes")(6)(7)(8)
 
501,437 
 
(789) 
 
500,648 
 
490,155 
 
509,254 
 
(1,763) 
 
507,491 
 
489,108 
47/8% Senior Notes due 2027 (the 
“47/8% Notes due 2027")(6)(7)(9)
 
1,000,000 
 
(3,910) 
 
996,090 
 
972,500 
 
1,000,000 
 
(5,332) 
 
994,668 
 
967,500 
51/4% Senior Notes due 2028 (the 
“51/4% Notes due 2028")(6)(7)(9)
 
825,000 
 
(3,838) 
 
821,162 
 
804,375 
 
825,000 
 
(5,019) 
 
819,981 
 
800,250 
5% Senior Notes due 2028 (the 
“5% Notes due 2028")(6)(7)(9)
 
500,000 
 
(2,592) 
 
497,408 
 
481,250 
 
500,000 
 
(3,316) 
 
496,684 
 
478,750 
7% Senior Notes due 2029 (the 
"7% Notes due 2029")(6)(7)(9)
 
1,000,000 
 
(8,686) 
 
991,314 
 1,020,000 
 
1,000,000 
 
(10,813) 
 
989,187 
 1,027,500 
47/8% Senior Notes due 2029 (the 
“47/8% Notes due 2029")(6)(7)(9)
 
1,000,000 
 
(6,871) 
 
993,129 
 
945,000 
 
1,000,000 
 
(8,318) 
 
991,682 
 
945,000 
51/4% Senior Notes due 2030 (the 
“51/4% Notes due 2030")(6)(7)(9)
 
1,300,000 
 
(8,399) 
 
1,291,601 
 1,235,000 
 
1,300,000 
 
(9,903) 
 
1,290,097 
 1,241,500 
41/2% Senior Notes due 2031 (the 
“41/2% Notes")(6)(7)(9)
 
1,100,000 
 
(7,674) 
 
1,092,326 
 1,001,000 
 
1,100,000 
 
(8,917) 
 
1,091,083 
 
995,500 
5% Senior Notes due 2032 (the 
“5% Notes due 2032")(6)(7)(10)
 
750,000 
 
(9,900) 
 
740,100 
 
688,125 
 
750,000 
 
(11,206) 
 
738,794 
 
684,375 
55/8% Senior Notes due 2032 (the 
“55/8% Notes")(6)(7)(9)
 
600,000 
 
(4,404) 
 
595,596 
 
570,000 
 
600,000 
 
(4,985) 
 
595,015 
 
567,000 
61/4% Senior Notes due 2033 (the 
“61/4% Notes")(6)(7)(9)
 
1,200,000 
 
(14,517) 
 
1,185,483 
 1,194,000 
 
— 
 
— 
 
— 
 
— 
Real Estate Mortgages, Financing 
Lease Liabilities and Other(11)
 
614,231 
 
(1,825) 
 
612,406 
 
614,231 
 
519,907 
 
(403) 
 
519,504 
 
519,907 
Accounts Receivable 
Securitization Program(4)(12)
 
400,000 
 
(670) 
 
399,330 
 
400,000 
 
358,500 
 
(317) 
 
358,183 
 
358,183 
Total Long-term Debt
 
13,836,364 
 
(117,278) 
 13,719,086 
 
12,034,622 
 
(101,452) 
 11,933,170 
Less Current Portion
 
(715,109) 
 
— 
 
(715,109) 
 
(120,670) 
 
— 
 
(120,670) 
Long-term Debt, Net of Current 
Portion
$ 
13,121,255 
$ 
(117,278) 
$ 13,003,977 
$ 
11,913,952 
$ 
(101,452) 
$ 11,812,500 
(1) The capital stock or other equity interests of our United States subsidiaries representing the substantial majority of our United States operations, and up to 66% of the 
capital stock or other equity interests of most of our first-tier foreign subsidiaries, are pledged to secure these debt instruments, together with all intercompany 
obligations (including promissory notes) of subsidiaries owed to us or to one of our United States subsidiary guarantors. In addition, Iron Mountain Canada 
Operations ULC has pledged 66% of the capital stock of its subsidiaries, and all intercompany obligations (including promissory notes) owed to or held by it, to 
secure the Revolving Credit Facility. The fair value (Level 2 and Level 3 of fair value hierarchy described at Note 2.p.) of these debt instruments approximates the 
carrying value (as borrowings under these debt instruments are based on current variable market interest rates (plus a margin that is subject to change based on our 
consolidated leverage ratio), as of December 31, 2024 and 2023 (collectively, the "Credit Agreement Collateral").
(2) The amount of debt for the Term Loan B due 2026 (as defined below) reflects an unamortized original issue discount of $452 as of December 31, 2023.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT 
IRON MOUNTAIN 2024 FORM 10-K
103

(3) The amount of debt for the Term Loan B due 2031 (as defined below) reflects an unamortized original issue discount of $10,517 and $9,000 as of December 31, 
2024 and 2023, respectively.
(4) The fair value (Level 2 of fair value hierarchy described at Note 2.p.) of this debt instrument approximates the carrying value as borrowings under this debt instrument 
are based on a current variable market interest rate.
(5) The amount of debt for the AUD Term Loan (as defined below) reflects an unamortized original issue discount of $842 and $1,452 as of December 31, 2024 and 
2023, respectively.
(6) The fair values (Level 2 of fair value hierarchy described at Note 2.p.) of these debt instruments are based on quoted market prices for comparable notes on 
December 31, 2024 and 2023, respectively.
(7) Collectively, the "Unregistered Notes". The Unregistered Notes have not been registered under the Securities Act of 1933, as amended (the "Securities Act"), or 
under the securities laws of any other jurisdiction. Unless they are registered, the Unregistered Notes may be offered only in transactions that are exempt from 
registration under the Securities Act or the securities laws of any other jurisdiction.
(8) Iron Mountain (UK) PLC ("IM UK") is the direct obligor on the GBP Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI and IMI’s United 
States subsidiaries that represent the substantial majority of our United States operations (the "Note Guarantors"). These guarantees are joint and several obligations 
of IMI and the Note Guarantors. The remainder of our subsidiaries do not guarantee the GBP Notes. The full amount of the GBP Notes is classified within the current 
portion of long-term debt in our Consolidated Balance Sheet at December 31, 2024.
(9) Collectively, the "Parent Notes". IMI is the direct obligor on the Parent Notes, which are fully and unconditionally guaranteed, on a senior basis, by the Note 
Guarantors. These guarantees are joint and several obligations of the Note Guarantors. The remainder of our subsidiaries do not guarantee the Parent Notes.
(10) Iron Mountain Information Management Services, Inc. ("IMIM Services") is the direct obligor on the 5% Notes due 2032, which are fully and unconditionally 
guaranteed, on a senior basis, by IMI and the Note Guarantors. These guarantees are joint and several obligations of IMI and the Note Guarantors. The remainder of 
our subsidiaries do not guarantee the 5% Notes due 2032.
(11) We believe the fair value (Level 2 of fair value hierarchy described at Note 2.p.) of this debt approximates its carrying value as these borrowings are based on current 
market interest rates. This debt includes the following:
 
DECEMBER 31, 2024
DECEMBER 31, 2023
Real estate mortgages(1)
$ 
74,250 
$ 
57,753 
Financing lease liabilities(2)
 
406,841 
 
349,865 
Other notes and other obligations(3)
 
133,140 
 
112,289 
 
$ 
614,231 
$ 
519,907 
(1) Bear interest at approximately 4.4% and 3.6% at December 31, 2024 and 2023, respectively, and includes $50,000 outstanding under our Mortgage 
Securitization Program at both December 31, 2024 and 2023.
(2) Bear a weighted average interest rate of 5.2% and 6.1% at December 31, 2024 and 2023, respectively.
(3) These notes and other obligations, which were assumed by us as a result of certain acquisitions, bear a weighted average interest rate of 7.2% and 8.5% at 
December 31, 2024 and 2023, respectively.
(12) The Accounts Receivable Securitization Special Purpose Subsidiaries (as defined below) are the obligors under this program.
A. CREDIT AGREEMENT
Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the "Revolving Credit Facility"), a term loan A 
facility (the "Term Loan A") and a term loan B facility (the "Term Loan B due 2031"). The Credit Agreement also included a second 
term loan B facility (the "Term Loan B due 2026") until its extinguishment in August 2024.
During the year ended December 31, 2024, we took the following actions regarding our Credit Agreement:
•
On June 7, 2024, due to the discontinuance of the Canadian Dollar Offered Rate reference rate on June 28, 2024, we amended 
the Credit Agreement to update the interest rate benchmark available for Canadian currency borrowings under our Revolving 
Credit Facility to the Canadian Overnight Repo Rate Average, effective July 1, 2024.
•
On July 2, 2024, we amended the Credit Agreement, which resulted in:
◦
an increase in the principal amount of the Term Loan B due 2031 from approximately $1,194,000 to approximately 
$1,806,700, 
◦
a decrease in the interest rate of the Term Loan B due 2031 from the SOFR plus 2.25% to the SOFR plus 2.00% and 
◦
a decrease in the principal amount of our Term Loan B due 2026 from approximately $656,300 to approximately 
$53,400.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED) 
104
IRON MOUNTAIN 2024 FORM 10-K

•
In connection with the July 2, 2024 amendment, we paid original issue discount fees of approximately $4,300, and we recorded 
a charge to Other expense (income), net related to the extinguishment of debt.
•
On August 19, 2024, we:
◦
repaid the remaining approximately $53,400 principal balance of the Term Loan B due 2026 and
◦
amended the Credit Agreement to increase the principal amount of the Term Loan B due 2031 from approximately 
$1,806,700 to approximately $1,860,000.
•
On November 7, 2024, we amended the Credit Agreement, which resulted in:
◦
an extension of the maturity date of the Revolving Credit Facility and the Term Loan A from March 18, 2027 to March 
18, 2030,
◦
a decrease in the principal amount of the Term Loan A from $250,000 to $218,750,
◦
an increase of the borrowing capacity that IMI and certain of its United States and foreign subsidiaries are able to 
borrow under the Revolving Credit Facility from $2,250,000 to $2,750,000 and
◦
the removal of the 10 basis point credit spread adjustment applicable to the Revolving Credit Facility and Term Loan A.
The Revolving Credit Facility enables IMI and certain of its subsidiaries to borrow an aggregate outstanding amount not to exceed 
$2,750,000 in United States dollars and (subject to sublimits) Canadian dollars. Additionally, the Credit Agreement permits us to 
incur incremental indebtedness thereunder by adding new term loans or revolving loans or by increasing the principal amount of 
any existing loans thereunder. The Revolving Credit Facility and the Term Loan A are scheduled to mature on March 18, 2030, at 
which point all obligations become due. The Term Loan A, which was fully drawn as of December 31, 2024, is to be paid in 
quarterly installments in an amount equal to approximately $2,700 per quarter. The Term Loan B due 2031 is scheduled to mature 
on January 31, 2031, at which point all obligations become due. The Term Loan B due 2031, which was fully drawn as of 
December 31, 2024, is to be paid in quarterly installments in an amount equal to approximately $4,700 per quarter.
IMI and certain subsidiaries of IMI that represent the substantial majority of our operations in the United States, Canada and the 
United Kingdom guarantee all obligations under the Credit Agreement. The interest rate on borrowings under the Revolving Credit 
Facility varies depending on our choice of interest rate benchmark and currency options, plus an applicable margin, which varies 
based on our consolidated leverage ratio. The Term Loan A bears interest at the SOFR plus 1.75%. The Term Loan B due 2026 
bore interest at the synthetic LIBOR rate plus 1.75% until its extinguishment in August 2024. Additionally, the Credit Agreement 
requires the payment of a commitment fee on the unused portion of the Revolving Credit Facility, which fee ranges from 0.2% to 
0.3% based on our consolidated leverage ratio. 
As of December 31, 2024, we had $121,000, $216,016 and $1,850,698 outstanding under the Revolving Credit Facility, Term Loan 
A and the Term Loan B due 2031, respectively. As of December 31, 2024, we had various outstanding letters of credit totaling 
$7,766 under the Revolving Credit Facility. The remaining amount available for borrowing under the Revolving Credit Facility as of 
December 31, 2024, which is based on IMI’s leverage ratio, the last 12 months' earnings before interest, taxes, depreciation and 
amortization and rent expense ("EBITDAR"), other adjustments as defined in the Credit Agreement and current external debt, was 
$2,621,234 (which amount represents the maximum availability as of such date). Available borrowings under the Revolving Credit 
Facility are subject to compliance with our indenture covenants as discussed below. The weighted average interest rate in effect 
under the Revolving Credit Facility as of December 31, 2024 was 6.3%. The interest rates in effect under the Term Loan A as of 
December 31, 2024 and 2023 were 6.1% and 7.2%, respectively. The interest rate in effect under the Term Loan B due 2026 as of 
December 31, 2023 was 5.2%. The interest rates in effect under the Term Loan B due 2031 as of December 31, 2024 and 2023 
were 6.4% and 7.6%, respectively.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
105

REVOLVING CREDIT FACILITY
$2,750,000
TERM LOAN A
$218,750
TERM LOAN B DUE 2031
$1,860,000
Outstanding borrowings
$121,000
Aggregate outstanding principal amount
$216,016
Aggregate outstanding principal amount
$1,850,698
As of December 31, 2024
6.1%
Interest rate
6.4%
Interest rate
As of December 31, 2024
As of December 31, 2024
B. VIRGINIA CREDIT AGREEMENTS
As our Global Data Center Business continues to expand, we have entered into credit agreements in order to partially finance the 
construction of various data centers. These agreements primarily consist of term loan facilities with the following terms:
AGREEMENT
MAXIMUM 
BORROWING
AMOUNT
OUTSTANDING 
BORROWINGS AS 
OF DECEMBER 31, 
2024
DIRECT 
OBLIGOR
CONTRACTUAL INTEREST 
RATE
UNUSED 
COMMITMENT 
FEE
MATURITY 
DATE(1)
Virginia 4/5(2)
$ 
204,987 
$ 
76,535 
Iron Mountain Data Centers 
Virginia 4/5 Subsidiary, LLC
SOFR plus a credit spread 
adjustment of 0.1% plus 1.625%
 0.49 %
October 31, 2025
Virginia 3(3)
 
275,000 
 
271,079 
Iron Mountain Data Centers 
Virginia 3, LLC
SOFR plus 2.50%
 0.75 %
August 31, 2026
Virginia 7 Term 
Loans(4)
 
300,000 
 
32,074 
Iron Mountain Data Centers 
Virginia 7, LLC
SOFR plus 2.50%
 0.75 %
April 12, 2027
Virginia 6 Term 
Loans(5)
 
210,000 
 
137,495 
Iron Mountain Data Centers 
Virginia 6, LLC
SOFR plus 2.75%
 0.75 %
May 3, 2027
(1) All obligations will become due on the specified maturity dates. Each agreement includes two one-year options that allow us to extend the initial maturity date, subject 
to the conditions specified in the agreements. 
(2) Iron Mountain Data Centers Virginia 4/5 Subsidiary, LLC, a wholly-owned subsidiary of Iron Mountain Data Centers Virginia 4/5 JV, LP, has a credit agreement that 
includes a term loan facility (the "Virginia 4/5 Term Loans") and a letter of credit facility (collectively, the "Virginia 4/5 Credit Agreement"). The Virginia 4/5 Credit 
Agreement is secured by the equity interests and assets of Iron Mountain Data Centers Virginia 4/5 Subsidiary, LLC. As of December 31, 2024 and 2023, the Virginia 
4/5 Term Loans have a weighted average interest rate of 5.1% and 6.1%, respectively.
(3) Iron Mountain Data Centers Virginia 3, LLC, a wholly-owned subsidiary of IMI, has a credit agreement that includes a term loan facility (the "Virginia 3 Term Loans") 
and a letter of credit facility (collectively, the "Virginia 3 Credit Agreement"). The Virginia 3 Credit Agreement is secured by the equity interests and assets of Iron 
Mountain Data Centers Virginia 3, LLC. As of December 31, 2024 and 2023, the Virginia 3 Term Loans have a weighted average interest rate of 6.7% and 6.2%, 
respectively.
(4) On April 12, 2024, Iron Mountain Data Centers Virginia 7, LLC, a wholly-owned subsidiary of Iron Mountain Data Centers Virginia 6/7 JV, LLC, entered into a credit 
agreement (the "Virginia 7 Credit Agreement"). The Virginia 7 Credit Agreement consists of a term loan facility (the "Virginia 7 Term Loans") and a letter of credit 
facility. The Virginia 7 Credit Agreement is secured by the equity interests and assets of Iron Mountain Data Centers Virginia 7, LLC. As of December 31, 2024, the 
interest rate in effect under the Virginia 7 Credit Agreement was 7.0%.
(5) On May 3, 2024, Iron Mountain Data Centers Virginia 6, LLC, a wholly-owned subsidiary of Iron Mountain Data Centers Virginia 6/7 JV, LLC, entered into a credit 
agreement (the "Virginia 6 Credit Agreement"). The Virginia 6 Credit Agreement consists of a term loan facility (the "Virginia 6 Term Loans") and a letter of credit 
facility. The Virginia 6 Credit Agreement is secured by the equity interests and assets of Iron Mountain Data Centers Virginia 6, LLC. As of December 31, 2024, the 
interest rate in effect under the Virginia 6 Credit Agreement was 7.1%.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED) 
106
IRON MOUNTAIN 2024 FORM 10-K

C. NOTES ISSUED UNDER INDENTURES
Each series of notes shown below (i) is effectively subordinated to all of our secured indebtedness, including under the Credit 
Agreement, to the extent of the value of the collateral securing such indebtedness, (ii) ranks pari passu in right of payment with 
each other and with debt outstanding under the Credit Agreement, the senior notes shown below and other "senior debt" we incur 
from time to time and (iii) is structurally subordinated to all liabilities of our subsidiaries that do not guarantee such series of notes.
The key terms of our indentures are as follows:
SENIOR NOTES
AGGREGATE
PRINCIPAL 
AMOUNT
DIRECT 
OBLIGOR
MATURITY DATE
CONTRACTUAL 
INTEREST RATE
INTEREST PAYMENTS DUE
PAR CALL DATE(1)
GBP Notes
£ 
400,000  
IM UK
November 15, 2025
37/8%
May 15 and November 15
November 15, 2022
47/8% Notes due 2027
$ 
1,000,000 
IMI
September 15, 2027
47/8%
March 15 and September 15
September 15, 2025
51/4% Notes due 2028
$ 
825,000 
IMI
March 15, 2028
51/4%
March 15 and September 15
March 15, 2025
5% Notes due 2028
$ 
500,000 
IMI
July 15, 2028
5%
January 15 and July 15
July 15, 2025
7% Notes due 2029
$ 
1,000,000 
IMI
February 15, 2029
7%
February 15 and August 15
August 15, 2025
47/8% Notes due 2029
$ 
1,000,000 
IMI
September 15, 2029
47/8%
March 15 and September 15
September 15, 2027
51/4% Notes due 2030
$ 
1,300,000 
IMI
July 15, 2030
51/4%
January 15 and July 15
July 15, 2028
41/2% Notes
$ 
1,100,000 
IMI
February 15, 2031
41/2%
February 15 and August 15
February 15, 2029
5% Notes due 2032
$ 
750,000 
IMIM Services
July 15, 2032
5%
May 15 and November 15
July 15, 2027
55/8% Notes
$ 
600,000 
IMI
July 15, 2032
55/8%
January 15 and July 15
July 15, 2029
61/4% Notes
$ 
1,200,000 
IMI
January 15, 2033
61/4%
January 15 and July 15
December 6, 2029
(1) We may redeem the notes at any time, at our option, in whole or in part. Prior to the par call date, we may redeem the notes at the redemption price or make-whole 
premium specified in the applicable indenture, together with accrued and unpaid interest to, but excluding, the redemption date. On or after the par call date, we may 
redeem the notes at a price equal to 100% of the principal amount being redeemed, together with accrued and unpaid interest to, but excluding, the redemption date.
Each of the indentures for the notes provides that we must repurchase, at the option of the holders, the notes at 101% of their 
principal amount, plus accrued and unpaid interest, upon the occurrence of a "Change of Control", which is defined in each 
respective indenture. Except for required repurchases upon the occurrence of a Change of Control or in the event of certain asset 
sales, each as described in the respective indenture, we are not required to make sinking fund or redemption payments with 
respect to any of the notes.
DECEMBER 2024 OFFERING
On December 6, 2024, IMI completed a private offering of:
SERIES OF NOTES
AGGREGATE 
PRINCIPAL AMOUNT
61/4% Notes
$ 
1,200,000 
The 61/4% Notes were issued at 100% of par. The total net proceeds of approximately $1,188,000 from the issuance, after 
deducting the initial purchasers' commissions, were used to repay a portion of the outstanding borrowings under the Revolving 
Credit Facility.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
107

D. AUSTRALIAN DOLLAR TERM LOAN
Iron Mountain Australia Group Pty, Ltd., a wholly-owned subsidiary of IMI, has an AUD term loan with an original principal balance 
of 350,000 Australian dollars ("AUD Term Loan"). All indebtedness associated with the AUD Term Loan was issued at 99% of par. 
Principal payments on the AUD Term Loan are to be paid in quarterly installments in an aggregate amount of 7,695 Australian 
dollars per year. The AUD Term Loan bears interest at BBSY (an Australian benchmark variable interest rate) plus 3.625%. The 
AUD Term Loan is guaranteed by Iron Mountain Australia Group Pty, Ltd. and certain other Australian subsidiaries (the "Australia 
Group Guarantors") and by the guarantors of the Credit Agreement. The AUD Term Loan is secured by the capital stock and assets 
of the Australia Group Guarantors and by the Credit Agreement Collateral. The AUD Term Loan is scheduled to mature on 
September 30, 2026, at which point all obligations become due.
As of December 31, 2024, we had 284,727 Australian dollars (or $176,655, based upon 
the exchange rate between the United States dollar and the Australian dollar as of 
December 31, 2024) outstanding on the AUD Term Loan. As of December 31, 2023, we 
had 292,422 Australian dollars (or $199,195, based upon the exchange rate between 
the United States dollar and the Australian dollar as of December 31, 2023) outstanding 
on the AUD Term Loan. The interest rate in effect under the AUD Term Loan was 8.1% 
and 8.0% as of December 31, 2024 and 2023, respectively.
OUTSTANDING BORROWINGS
AU$284,727
8.1%
Interest rate
As of December 31, 2024
E. UK BILATERAL REVOLVING CREDIT FACILITY
IM UK and Iron Mountain (UK) Data Centre Limited, wholly owned subsidiaries of IMI 
(collectively, the "UK Borrowers"), have a British pounds sterling Revolving Credit 
Facility (the "UK Bilateral Revolving Credit Facility"). The maximum amount permitted to 
be borrowed under the UK Bilateral Revolving Credit Facility is 140,000 British pounds 
sterling. We have the option to request additional commitments of up to 125,000 British 
pounds sterling, subject to conditions specified in the UK Bilateral Revolving Credit 
Facility. IMI and subsidiaries of IMI that represent the substantial majority of our 
operations in the United States and the United Kingdom guarantee all obligations under 
the UK Bilateral Revolving Credit Facility. The UK Bilateral Revolving Credit Facility is 
secured by certain properties in the United Kingdom. The UK Bilateral Revolving Credit 
Facility bears interest at the Sterling Overnight Index Average plus 2.0%. 
On September 10, 2024, the UK Borrowers amended the UK Bilateral Revolving Credit 
Facility to extend the maturity date from September 24, 2025 to September 24, 2026.
The UK Bilateral Revolving Credit Facility was fully drawn as of December 31, 2024. 
The interest rate in effect under the UK Bilateral Revolving Credit Facility was 7.0% and 
7.3% as of December 31, 2024 and 2023, respectively. 
MAXIMUM AMOUNT
£140,000
OPTIONAL ADDITIONAL 
COMMITMENTS
£125,000
7.0%
Interest rate
As of December 31, 2024
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED) 
108
IRON MOUNTAIN 2024 FORM 10-K

F. ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM 
We participate in an accounts receivable securitization program (the "Accounts Receivable Securitization Program") involving 
several of our wholly-owned subsidiaries and certain financial institutions. Under the Accounts Receivable Securitization Program, 
certain of our subsidiaries sell substantially all of their United States accounts receivable balances to our wholly-owned special 
purpose entities, Iron Mountain Receivables QRS, LLC and Iron Mountain Receivables TRS, LLC (the "Accounts Receivable 
Securitization Special Purpose Subsidiaries"). The Accounts Receivable Securitization Special Purpose Subsidiaries use the 
accounts receivable balances to collateralize loans obtained from certain financial institutions. The Accounts Receivable 
Securitization Special Purpose Subsidiaries are consolidated subsidiaries of IMI. The Accounts Receivable Securitization Program 
is accounted for as a collateralized financing activity, rather than a sale of assets, and therefore: (i) accounts receivable balances 
pledged as collateral are presented as assets and borrowings are presented as liabilities on our Consolidated Balance Sheets, (ii) 
our Consolidated Statements of Operations reflect the associated charges for bad debt expense related to pledged accounts 
receivable (a component of selling, general and administrative expenses) and reductions to revenue due to billing and service 
related credit memos issued to customers and related reserves, as well as interest expense associated with the collateralized 
borrowings and (iii) receipts from customers related to the underlying accounts receivable are reflected as operating cash flows and 
borrowings and repayments under the collateralized loans are reflected as financing cash flows within our Consolidated Statements 
of Cash Flows. Iron Mountain Information Management, LLC retains the responsibility of servicing the accounts receivable 
balances pledged as collateral for the Accounts Receivable Securitization Program and IMI provides a performance guaranty. The 
maximum availability allowed is limited by eligible accounts receivable, as defined under the terms of the Accounts Receivable 
Securitization Program. The Accounts Receivable Securitization Program is secured by a substantial majority of our net receivables 
in the United States.
On June 14, 2024, we amended the Accounts Receivable Securitization Program to (i) 
increase the maximum borrowing capacity from $360,000 to $400,000 and (ii) extend 
the maturity date from July 1, 2025 to July 1, 2027, at which point all obligations become 
due. 
As of December 31, 2024 and 2023, the amount outstanding under the Accounts 
Receivable Securitization Program was $400,000 and $358,500, respectively. The 
interest rate in effect under the Accounts Receivable Securitization Program was 5.6% 
and 6.4% as of December 31, 2024 and 2023, respectively. We have the option to 
increase the borrowing capacity by $75,000. Commitment fees at a rate of 35 basis 
points are charged on amounts made available but not borrowed under the Accounts 
Receivable Securitization Program.
MAXIMUM AMOUNT
$400,000
OUTSTANDING BORROWINGS
$400,000
5.6%
Interest rate
As of December 31, 2024
G. CASH POOLING
Certain of our subsidiaries participate in cash pooling arrangements (the "Cash Pools") to help manage global liquidity 
requirements. We utilize the following Cash Pools: (i) two Cash Pools with ING Bank NV (doing business as Bank Mendes Gans), 
one of which we use to manage global liquidity requirements for our qualified REIT subsidiaries ("QRSs") and the other for our 
taxable REIT subsidiaries ("TRSs"), (ii) two Cash Pools with JP Morgan Chase Bank, N.A. ("JPM"), one of which we use to manage 
liquidity requirements for our QRSs in the Asia Pacific region and the other for our TRSs in the Asia Pacific region and (iii) two Cash 
Pools with JPM, one of which we use to manage liquidity requirements for our QRSs in the Europe, Middle East, and Africa regions 
and the other for our TRSs in the Europe, Middle East, and Africa regions. 
Under each of the Cash Pools, cash deposited by participating subsidiaries with certain financial institutions is pledged as security 
against the debit balances of other participating subsidiaries with legal rights of offset provided to the financial institutions. 
Therefore, such amounts are presented in our Consolidated Balance Sheets on a net basis. Each subsidiary receives interest on 
the cash balances held on deposit or pays interest on its debit balances based on an applicable rate as defined in the Cash Pools.
The net cash position balances as of December 31, 2024 and 2023 are reflected as Cash and cash equivalents in our 
Consolidated Balance Sheets. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
109

H. LETTERS OF CREDIT
As of December 31, 2024, we had outstanding letters of credit totaling $64,147, of which $7,766 reduce our borrowing capacity 
under the Revolving Credit Facility (as described above). The letters of credit expire at various dates between March 2025 and May 
2027.
I. DEBT COVENANTS
The Credit Agreement, our bond indentures and other agreements governing our indebtedness contain certain restrictive financial 
and operating covenants, including covenants that restrict our ability to complete acquisitions, pay cash dividends, incur 
indebtedness, make investments, sell assets and take other specified corporate actions. The covenants do not contain a rating 
trigger. Therefore, a change in our debt rating would not trigger a default under the Credit Agreement, our bond indentures or other 
agreements governing our indebtedness. The Credit Agreement requires that we satisfy a net total lease adjusted leverage ratio 
and a fixed charge coverage ratio on a quarterly basis, and our bond indentures require that, among other things, we satisfy a 
leverage ratio (not lease adjusted) or a fixed charge coverage ratio (not lease adjusted), as a condition to taking actions such as 
paying dividends and incurring indebtedness. 
The Credit Agreement uses EBITDAR-based calculations and the bond indentures use earnings before income, taxes, depreciation 
and amortization ("EBITDA") based calculations as the primary measures of financial performance for purposes of calculating 
leverage and fixed charge coverage ratios. The EBITDAR- and EBITDA-based leverage calculations include our consolidated 
subsidiaries, other than those we have designated as "Unrestricted Subsidiaries" as defined in the Credit Agreement and bond 
indentures. Generally, the Credit Agreement and the bond indentures use a trailing four fiscal quarter basis for purposes of the 
relevant calculations and require certain adjustments and exclusions for purposes of those calculations, which make the calculation 
of financial performance under the Credit Agreement and bond indentures not directly comparable to Adjusted EBITDA as 
presented herein. We are in compliance with our leverage and fixed charge coverage ratios under the Credit Agreement, our bond 
indentures and other agreements governing our indebtedness as of December 31, 2024. Noncompliance with these leverage and 
fixed charge coverage ratios would have a material adverse effect on our financial condition and liquidity.
J. MATURITIES OF LONG-TERM DEBT (GROSS OF DISCOUNTS) ARE AS FOLLOWS:
YEAR
AMOUNT
2025
$ 
715,109 
2026
 
847,189 
2027
 
1,653,222 
2028
 
1,429,616 
2029
 
2,078,681 
Thereafter
 
7,123,905 
 
13,847,722 
Net Discounts
 
(11,358) 
Net Deferred Financing Costs 
 
(117,278) 
Total Long-term Debt (including current portion)
$ 
13,719,086 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
7. DEBT (CONTINUED) 
110
IRON MOUNTAIN 2024 FORM 10-K

A. PURCHASE COMMITMENTS
We have certain contractual obligations related to purchase commitments which require minimum payments as follows:
YEAR
PURCHASE 
COMMITMENTS(1)
2025
$ 
74,975 
2026
 
50,559 
2027
 
94,489 
2028
 
28,174 
2029
 
10,201 
Thereafter
 
9,483 
$ 
267,881 
(1) Purchase commitments (i) include obligations related principally to software maintenance and support services and (ii) exclude our operating and financing lease 
obligations (see Note 2.j.) and our deferred purchase obligations (see Note 2.p.).
In addition to the above, as of December 31, 2024, we have contractual commitments of approximately $886,900 for future 
construction costs associated with the expansion of our Global Data Center Business that are expected to be incurred over the 
next one to two years.
B. SELF-INSURED LIABILITIES
We are self-insured up to certain limits for costs associated with workers’ compensation claims, vehicle accidents, property and 
general business liabilities and benefits paid under employee healthcare and short-term disability programs. At December 31, 2024 
and 2023, there were approximately $45,200 and $42,500, respectively, of self-insurance accruals reflected in Accrued expenses 
on our Consolidated Balance Sheets. The measurement of these costs requires the consideration of historical cost experience and 
judgments about the present and expected levels of cost per claim. We account for these costs primarily through actuarial 
methods, which develop estimates of the undiscounted liability for claims incurred, including those claims incurred but not reported. 
These methods provide estimates of future claim costs based on claims incurred as of the balance sheet date.
C. LITIGATION—GENERAL
We are involved in litigation from time to time in the ordinary course of business, including litigation arising from damage to 
customer assets in our facilities caused by fires and other natural disasters. A portion of the defense and/or settlement costs 
associated with such litigation is covered by various commercial liability insurance policies purchased by us and, in limited cases, 
indemnification from third parties. Our policy is to establish reserves for loss contingencies when the losses are both probable and 
reasonably estimable. We record legal costs associated with loss contingencies as expenses in the period in which they are 
incurred. While the outcome of litigation is inherently uncertain, we do not believe any current litigation will have a material adverse 
effect on our consolidated financial condition, results of operations or cash flows. We have estimated a reasonably possible range 
for all loss contingencies and believe it is reasonably possible that we could incur aggregate losses in addition to amounts currently 
accrued for all matters up to an additional $11,000 over the next several years. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
8. COMMITMENTS AND CONTINGENCIES
IRON MOUNTAIN 2024 FORM 10-K
111

DIVIDENDS
Our board of directors has adopted a dividend policy under which we have paid, and in the future intend to pay, quarterly cash 
dividends on our common stock. The amount and timing of future dividends will continue to be subject to the approval of our board 
of directors, in its sole discretion, and to applicable legal requirements.
In 2022, 2023 and 2024, our board of directors declared the following dividends:
DECLARATION DATE
DIVIDEND
PER SHARE
RECORD DATE
TOTAL AMOUNT
PAYMENT DATE
February 24, 2022
$ 
0.6185 
March 15, 2022
$ 
179,661 
April 6, 2022
April 28, 2022
 
0.6185 
June 15, 2022
 
179,781 
July 6, 2022
August 4, 2022
 
0.6185 
September 15, 2022
 
179,790 
October 4, 2022
November 3, 2022
 
0.6185 
December 15, 2022
 
179,866 
January 5, 2023
February 23, 2023
 
0.6185 
March 15, 2023
 
180,339 
April 5, 2023
May 4, 2023
 
0.6185 
June 15, 2023
 
180,493 
July 6, 2023
August 3, 2023
 
0.6500 
September 15, 2023
 
189,730 
October 5, 2023
November 2, 2023
 
0.6500 
December 15, 2023
 
189,886 
January 4, 2024
February 22, 2024
 
0.6500 
March 15, 2024
 
190,506 
April 4, 2024
May 2, 2024
 
0.6500 
June 17, 2024
 
190,643 
July 5, 2024
August 1, 2024
 
0.7150 
September 16, 2024
 
209,776 
October 3, 2024
November 6, 2024
 
0.7150 
December 16, 2024
 
209,913 
January 7, 2025
On February 13, 2025, we declared a dividend to our stockholders of record as of March 17, 2025 of $0.7850 per share, payable 
on April 4, 2025.
During the years ended December 31, 2024, 2023 and 2022, we declared dividends in an aggregate and per share amount, based 
on the weighted average number of common shares outstanding during each respective year, as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Declared distributions
$ 
800,838 
$ 
740,448 
$ 
719,098 
Amount per share each distribution represents based on weighted average number 
of common shares outstanding
 
2.73 
 
2.54 
 
2.47 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
9. STOCKHOLDERS' EQUITY MATTERS
112
IRON MOUNTAIN 2024 FORM 10-K

For federal income tax purposes, distributions to our stockholders are generally treated as nonqualified ordinary dividends 
(potentially eligible for the lower effective tax rates available for "qualified REIT dividends"), qualified ordinary dividends or return of 
capital. The United States Internal Revenue Service requires historical C corporation earnings and profits to be distributed prior to 
any REIT distributions, which may affect the character of each distribution to our stockholders, including whether and to what extent 
each distribution is characterized as a qualified or nonqualified ordinary dividend. In addition, certain of our distributions qualify as 
capital gain distributions. For the years ended December 31, 2024, 2023 and 2022, the dividends we paid on our common shares 
were classified as follows:
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Nonqualified ordinary dividends
 82.6 %
 98.2 %
 90.4 %
Qualified ordinary dividends(1)
 — %
 0.8 %
 — %
Capital gains(2)
 — %
 — %
 9.6 %
Return of capital
 17.4 %
 1.0 %
 — %
 100.0 %
 100.0 %
 100.0 %
(1) During the year ended December 31, 2023, the percentage of our dividends that was classified as qualified ordinary dividends for federal income tax purposes 
primarily related to the distribution of historical C corporation earnings and profits during the year ended December 31, 2023. 
(2) During the year ended December 31, 2022, the percentage of our dividends that was classified as capital gains primarily related to the sale of land and buildings in 
the United States and Canada.
NONCONTROLLING INTERESTS
During the quarter ended September 30, 2024, a put option available to our partner in our Iron Mountain Data Centers Virginia 4/5 
JV, LP joint venture expired, triggering a change in the presentation of the related noncontrolling interest. Prior to September 30, 
2024, the noncontrolling interest of approximately $53,400 was presented as Redeemable noncontrolling interests in our 
Consolidated Balance Sheets. Our partner's interest is now presented as Noncontrolling interests in our Consolidated Balance 
Sheet.
During the quarter ended September 30, 2024, we entered into an agreement with a partner to form our Iron Mountain Data 
Centers Virginia 6/7 JV, LLC joint venture, which resulted in an initial Noncontrolling interest of approximately $103,100 recorded in 
our Consolidated Balance Sheet at September 30, 2024.
10. INCOME TAXES
We have been organized and have operated as a REIT effective beginning with our taxable year that ended on December 31, 
2014. As a REIT, we are generally permitted to deduct from our federal taxable income the dividends we pay to our stockholders. 
The income represented by such dividends is not subject to federal taxation at the entity level but is taxed, if at all, at the 
stockholder level. The income of our domestic TRSs, which hold our domestic operations that may not be REIT-compliant as 
currently operated and structured, is subject, as applicable, to federal and state corporate income tax. In addition, we and our 
subsidiaries continue to be subject to foreign income taxes in other jurisdictions in which we have business operations or a taxable 
presence, regardless of whether assets are held or operations are conducted through subsidiaries disregarded for federal income 
tax purposes or TRSs. We will also be subject to a separate corporate income tax on any gains recognized on the sale or 
disposition of any asset previously owned by a C corporation during a five-year period after the date we first owned the asset as a 
REIT asset that are attributable to "built-in gains" with respect to that asset on that date. We will also be subject to a built-in gains 
tax on our depreciation recapture recognized into income as a result of accounting method changes in connection with our 
acquisition activities. If we fail to remain qualified for taxation as a REIT, we will be subject to federal income tax at regular 
corporate income tax rates. Even if we remain qualified for taxation as a REIT, we may be subject to some federal, state, local and 
foreign taxes on our income and property in addition to taxes owed with respect to our TRS operations. In particular, while state 
income tax regimes often parallel the federal income tax regime for REITs, many states do not completely follow federal rules and 
some do not follow them at all.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
9. STOCKHOLDERS’ EQUITY MATTERS (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
113

The significant components of our deferred tax assets and deferred tax liabilities as of December 31, 2024 and 2023 are presented 
below:
 
DECEMBER 31,
 
2024
2023
Deferred Tax Assets:
 
 
Accrued liabilities and other adjustments
$ 
156,349 
$ 
100,476 
Net operating loss carryforwards
 
168,773 
 
158,363 
Valuation allowance
 
(132,714)  
(103,897) 
 
192,408 
 
154,942 
Deferred Tax Liabilities:
 
 
Other assets, principally due to differences in amortization
 
(185,301)  
(220,218) 
Property, plant and equipment, principally due to differences in depreciation
 
(63,192)  
(90,156) 
Other
 
(122,844)  
(65,909) 
 
(371,337)  
(376,283) 
Net deferred tax (liability) asset
$ 
(178,929) $ 
(221,341) 
The deferred tax assets and deferred tax liabilities as of December 31, 2024 and 2023 are presented below:
 
DECEMBER 31,
 
2024
2023
Noncurrent deferred tax assets (Included in Other, a component of Other assets, net)
$ 
26,412 
$ 
14,069 
Noncurrent deferred tax liabilities
 
(205,341)  
(235,410) 
At December 31, 2024, we have federal net operating loss carryforwards of $95,543 and disallowed interest expense carryforwards 
of $152,156, both of which can be carried forward indefinitely, and of which $89,178 and $68,745, respectively, are expected to be 
realized to reduce future federal taxable income. We have assets for foreign net operating losses of $146,616 and foreign 
disallowed interest expense carryforwards of $17,746, with various expiration dates (and in some cases no expiration date), subject 
to valuation allowances of approximately 72.0% and 46.5%, respectively. If actual results differ unfavorably from certain of our 
estimates used, we may not be able to realize all or part of our net deferred income tax assets and additional valuation allowances 
may be required. Although we believe our estimates are reasonable, no assurance can be given that our estimates reflected in the 
tax provisions and accruals will equal our actual results. These differences could have a material impact on our income tax 
provision and operating results in the period in which such determination is made.
A rollforward of the valuation allowance is as follows:
YEAR ENDED DECEMBER 31,
BALANCE AT 
BEGINNING OF 
THE YEAR
CHARGED 
(CREDITED) TO
EXPENSE
OTHER 
INCREASES/
(DECREASES)(1)(2)
BALANCE
AT END OF
THE YEAR
2024
$ 
103,897 
$ 
37,018 
$ 
(8,201) $ 
132,714 
2023
 
47,514 
 
4,855 
 
51,528 
 
103,897 
2022
 
51,744 
 
(1,333)  
(2,897)  
47,514 
(1) Other decreases and increases in valuation allowances are primarily related to changes in foreign currency exchange rates and prior year acquisitions.
(2) Prior to 2023, certain of our non-United States tax loss carryforwards were determined to have a remote possibility of realization and therefore were not reported in 
the table above. In connection with the implementation of the Organization for Economic Co-operation and Development (the "OECD") global minimum tax initiative 
known as Pillar Two, any existing deferred taxes not disclosed in our 2023 financial statements will not be available in the future to reduce tax otherwise due under 
Pillar Two. Accordingly, beginning in 2023, we are disclosing in the above table the tax effects of these non-United States tax loss carryforwards offset with a full 
valuation allowance.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
10. INCOME TAXES (CONTINUED)
114
IRON MOUNTAIN 2024 FORM 10-K

The components of net income (loss) before provision (benefit) for income taxes for the years ended December 31, 2024, 2023 
and 2022 are as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
United States
$ 
56,617 
$ 
76,012 
$ 
449,241 
Canada
 
153,450 
 
111,331 
 
103,826 
Other Foreign
 
34,471 
 
39,863 
 
78,571 
Net income (loss) before provision (benefit) for income taxes
$ 
244,538 
$ 
227,206 
$ 
631,638 
The provision (benefit) for income taxes for the years ended December 31, 2024, 2023 and 2022 consist of the following 
components:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Federal—current
$ 
5,205 
$ 
1,255 
$ 
24,331 
Federal—deferred
 
(2,394)  
(18,488)  
(30,581) 
State—current
 
914 
 
1,544 
 
8,553 
State—deferred
 
(3,731)  
(4,630)  
(3,728) 
Foreign—current
 
96,168 
 
72,408 
 
92,525 
Foreign—deferred
 
(35,290)  
(12,146)  
(21,611) 
Provision (Benefit) for Income Taxes
$ 
60,872 
$ 
39,943 
$ 
69,489 
A reconciliation of total income tax expense and the amount computed by applying the current federal statutory tax rate of 21.0% to 
net income (loss) before provision (benefit) for income taxes for the years ended December 31, 2024, 2023 and 2022, respectively, 
is as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Computed "expected" tax provision
$ 
51,353 
$ 
47,713 
$ 
132,644 
Changes in income taxes resulting from:
 
 
 
Tax adjustment relating to REIT
 
(33,926)  
(39,299)  
(82,620) 
State taxes, net of federal tax benefit
 
(2,919)  
(3,147)  
4,043 
Increase (decrease) in valuation allowance
 
37,018 
 
4,855 
 
(1,333) 
Withholding taxes
 
11,359 
 
11,658 
 
10,600 
(Reversal) reserve accrual and audit settlements, net of federal tax benefit
 
(2,052)  
(4,946)  
40 
Change in valuation of acquisition contingencies
 
643 
 
3,242 
 
(19,656) 
Foreign tax rate differential
 
13,322 
 
6,876 
 
22,227 
Adjustments relating to foreign taxes
 
(10,346)  
14,405 
 
2,820 
Excess tax benefits on equity compensation
 
(5,047)  
(1,905)  
(955) 
Other, net
 
1,467 
 
491 
 
1,679 
Provision (Benefit) for Income Taxes
$ 
60,872 
$ 
39,943 
$ 
69,489 
Our effective tax rates for the years ended December 31, 2024, 2023 and 2022 were 24.9%, 17.6% and 11.0%, respectively. Our 
effective tax rate is subject to variability in the future due to, among other items: (i) changes in the mix of income between our 
QRSs and our TRSs, as well as among the jurisdictions in which we operate, (ii) tax law changes, (iii) volatility in foreign exchange 
gains and losses, (iv) the timing of the establishment and reversal of tax reserves, (v) our ability to utilize net operating losses and 
interest expenses that we generate and (vi) the taxability or deductibility of significant transactions.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
10. INCOME TAXES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
115

The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate were:
YEAR ENDED DECEMBER 31,
2024
2023
2022
The lack of tax benefits recognized for the 
ordinary losses and disallowed interest 
expenses of certain entities of $37,018 and 
differences in the tax rates to which our 
foreign earnings are subject of $13,322, 
partially offset by the benefits derived from the 
dividends paid deduction of $33,926. In 
addition, we recorded gains and losses in 
Other expense (income), net during the 
period, for which there was no tax impact.
The benefits derived from the dividends paid 
deduction of $39,299 and the differences in 
the tax rates to which our foreign earnings 
are subject of $6,876. In addition, there were 
gains and losses recorded in Other expense 
(income), net for which there was no tax 
impact.
The benefits derived from the dividends paid 
deduction of $82,620 and the differences in 
the tax rates to which our foreign earnings 
are subject of $22,227. In addition, there 
were gains and losses recorded in Other 
expense (income), net and Gain (loss) on 
disposal/write-down of property, plant and 
equipment, net during the period for which 
there were insignificant tax impacts.
As a REIT, we are entitled to a deduction for dividends paid, resulting in a substantial reduction of federal income tax expense. As a 
REIT, substantially all of our income tax expense will be incurred based on the earnings generated by our foreign subsidiaries and 
our domestic TRSs. 
We provide for foreign withholding taxes on the undistributed earnings of our foreign TRSs because it is not our intention to reinvest 
the undistributed earnings of our foreign TRSs indefinitely outside the United States. As a REIT, future repatriation of incremental 
undistributed earnings of our foreign subsidiaries will not be subject to federal or state income tax.
The OECD has issued proposals that change long-standing tax principles, including a global minimum tax rate of 15% ("Pillar 
Two"). While the United States has not enacted legislation to effectuate Pillar Two, Iron Mountain operates in many foreign 
jurisdictions that have enacted legislation to implement Pillar Two. Pillar Two is applicable for Iron Mountain beginning in 2024. 
Since we do not have material operations in jurisdictions with tax rates lower than the Pillar Two minimum, we are not expecting a 
material impact on our effective tax rate, corporate tax liabilities or cash tax liabilities. We continue to monitor United States and 
global legislative actions as well as administrative guidance related to Pillar Two for potential impacts.
The evaluation of an uncertain tax position is a two-step process. The first step is a recognition process whereby we determine 
whether it is more likely than not that a tax position will be sustained upon examination, including resolution of any related appeals 
or litigation processes, based on the technical merits of the position. The second step is a measurement process whereby a tax 
position that meets the more likely than not recognition threshold is calculated to determine the amount of benefit to recognize in 
the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being 
realized upon ultimate settlement.
We have elected to recognize interest and penalties associated with uncertain tax positions as a component of the provision 
(benefit) for income taxes in the accompanying Consolidated Statements of Operations. We recorded decreases of $375 and 
$2,557 and an increase of $90 for gross interest and penalties for the years ended December 31, 2024, 2023 and 2022, 
respectively. We had $3,558 and $4,183 accrued for the payment of interest and penalties as of December 31, 2024 and 2023, 
respectively.
A summary of tax years that remain subject to examination by major tax jurisdictions is as follows:
TAX YEARS
TAX JURISDICTION
See Below
United States—Federal and State
2021 to present
United Kingdom
2016 to present
Canada
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
10. INCOME TAXES (CONTINUED)
116
IRON MOUNTAIN 2024 FORM 10-K

The normal statute of limitations for United States federal tax purposes is three years from the date the tax return is filed; however, 
the statute of limitations may remain open for periods longer than three years in instances where a federal tax examination is in 
progress. The 2024, 2023 and 2022 tax years and net operating loss carryforwards utilized in these years remain subject to 
examination for United States federal tax purposes. The normal statute of limitations for state purposes is between three to five 
years. However, certain of our state statute of limitations remain open for periods longer than this when audits are in progress.
We are subject to income taxes in the United States and numerous foreign jurisdictions. We are subject to examination by various 
tax authorities in jurisdictions in which we have business operations or a taxable presence. We regularly assess the likelihood of 
additional assessments by tax authorities and provide for these matters as appropriate. As of December 31, 2024, we had $25,876 
of reserves related to uncertain tax positions, of which $19,740 and $6,136 is included in other long-term liabilities and deferred 
income taxes, respectively, in the accompanying Consolidated Balance Sheet. As of December 31, 2023, we had $23,570 of 
reserves related to uncertain tax positions, of which $20,488 and $3,082 is included in other long-term liabilities and deferred 
income taxes, respectively, in the accompanying Consolidated Balance Sheet. Although we believe our tax estimates are 
appropriate, the final determination of tax audits and any related litigation could result in changes to our estimates.
A rollforward of unrecognized tax benefits is as follows:
Gross tax contingencies—January 1, 2022
$ 
27,772 
Gross additions based on tax positions related to the current year
 
2,271 
Gross additions for tax positions of prior years
 
723 
Gross reductions for tax positions of prior years
 
(1,866) 
Acquired unrecognized tax benefits
 
1,354 
Lapses of statutes
 
(2,501) 
Gross tax contingencies—December 31, 2022
 
27,753 
Gross additions based on tax positions related to the current year
 
3,511 
Gross additions for tax positions of prior years
 
634 
Gross reductions for tax positions of prior years
 
(5,454) 
Lapses of statutes
 
(2,874) 
Gross tax contingencies—December 31, 2023
 
23,570 
Gross additions based on tax positions related to the current year
 
3,091 
Gross reductions for tax positions of prior years
 
(1,698) 
Acquired unrecognized tax benefits
 
5,717 
Lapses of statutes
 
(4,804) 
Gross tax contingencies—December 31, 2024
$ 
25,876 
The reversal of the reserves of $25,876 as of December 31, 2024 will be recorded as a reduction of our income tax provision, if 
sustained. We believe that it is reasonably possible that an amount up to $2,941 of our unrecognized tax positions may be 
recognized by the end of 2025 as a result of a lapse of statute of limitations or upon closing and settling significant audits in various 
worldwide jurisdictions.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
10. INCOME TAXES (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
117

Our Chief Operating Decision Maker (“CODM”), our President and CEO, uses Adjusted EBITDA as the basis for evaluating the 
performance of, and allocating resources to, our operating segments. The CODM uses Adjusted EBITDA to ensure that resources, 
including capital, are allocated strategically to support our strategy. Other significant expenses regularly provided to the CODM 
include total Restructuring and other transformation costs, as disclosed in Note 13.
As of December 31, 2024, our two reportable segments are described as follows:
(1) Global Records and Information Management ("Global RIM") Business includes several distinct offerings:
(i)
Records Management, which stores physical records and provides information services, vital records services, courier 
operations, and the collection, handling and disposal of sensitive documents ("Records Management") for customers in 61 
countries around the globe. 
(ii)
Data Management, which provides storage and rotation of backup computer media as part of corporate disaster recovery 
plans, including service and courier operations, server and computer backup services and related services offerings 
("Data Management").
(iii) Global Digital Solutions, which develops, implements and supports comprehensive storage and information management 
solutions for the complete lifecycle of our customers’ information, including the management of physical records, 
conversion of documents to digital formats and digital storage of information. In August 2024, we launched the Insight 
Digital Experience Platform (also referred to as DXP), a secure, software-as-a-service platform designed to automate 
customer workflows, enhance data accessibility, ensure audit compliance and optimize customer data for artificial 
intelligence applications.
(iv) Secure Shredding, which includes the scheduled pick-up of office records that customers accumulate in specially 
designed secure containers we provide and is a natural extension of our hardcopy records management operations, 
completing the lifecycle of a record. Through a combination of shredding facilities and mobile shredding units consisting of 
custom built trucks, we are able to offer secure shredding services to our customers.
(v)
Media and Archive Services, which includes entertainment and media services, which help industry clients store, 
safeguard and deliver physical media of all types, and provides digital content repository systems that house, distribute 
and archive key media assets.
(vi) Consumer Storage, which provides on-demand, valet storage for consumers utilizing data analytics and machine learning 
to provide effective customer acquisition and a convenient and seamless consumer storage experience.
(2) Global Data Center Business, which provides enterprise-class data center facilities and hyperscale-ready capacity to protect 
mission-critical assets and ensure the continued operation of our customers’ IT infrastructure, with secure, reliable and flexible 
data center options. 
The remaining activities of our business consist primarily of our ALM and Fine Arts businesses and Corporate and Other.
(i)
ALM provides hyperscale and corporate IT infrastructure managers with services and solutions that enable the 
decommissioning, data erasure, processing and disposition, and recycling or sale of IT hardware and component assets. 
ALM services are enabled by: secure logistics, chain of custody and complete asset traceability practices, 
environmentally-responsible asset processing and recycling, and data sanitization and asset refurbishment services that 
enable value recovery through asset remarketing. In addition, ALM also offers workplace IT asset management services 
including storage, configuration, deployment, device support, end-of-life disposition and recycling or sale of employee IT 
devices. Our ALM services focus on protecting and eradicating customer data while maintaining strong, auditable and 
transparent chain of custody practices.
(ii)
Fine Arts provides technical expertise in the handling, installation and storing of art.
(iii) Corporate and Other also includes costs related to executive and staff functions, including finance, human resources and 
IT, which benefit the enterprise as a whole.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
11. SEGMENT INFORMATION
118
IRON MOUNTAIN 2024 FORM 10-K

The accounting policies of our reportable segments are the same as those described in Note 2.
An analysis of our business segment information and reconciliation to the accompanying Consolidated Financial Statements is as 
follows:
GLOBAL RIM 
BUSINESS
GLOBAL 
DATA CENTER 
BUSINESS
TOTAL 
REPORTABLE 
SEGMENTS
CORPORATE 
AND OTHER 
TOTAL
CONSOLIDATED
As of and for the Year Ended December 31, 2024
 
 
 
Total Revenues
$ 
4,979,438 
$ 
620,028 
$ 
5,599,466 
$ 
550,443 
$ 
6,149,909 
Storage Rental
 
3,009,094 
 
606,294 
 
3,615,388 
 
66,871 
 
3,682,259 
Service
 
1,970,344 
 
13,734 
 
1,984,078 
 
483,572 
 
2,467,650 
Other Reportable Segment Expenses(1)
 
2,756,321 
 
337,515 
 
3,093,836 
Adjusted EBITDA
 
2,223,117 
 
282,513 
 
2,505,630 
Total Assets(2)
 
10,408,885 
 
6,060,608 
 
16,469,493 
 
2,247,622 
 
18,717,115 
As of and for the Year Ended December 31, 2023
 
 
 
Total Revenues
$ 
4,661,776 
$ 
495,026 
$ 
5,156,802 
$ 
323,487 
$ 
5,480,289 
Storage Rental
 
2,834,352 
 
474,066 
 
3,308,418 
 
62,227 
 
3,370,645 
Service
 
1,827,424 
 
20,960 
 
1,848,384 
 
261,260 
 
2,109,644 
Other Reportable Segment Expenses(1)
 
2,634,739 
 
279,081 
 
2,913,820 
Adjusted EBITDA
 
2,027,037 
 
215,945 
 
2,242,982 
Total Assets(2)
 
10,876,225 
 
4,788,600 
 
15,664,825 
 
1,808,977 
 
17,473,802 
As of and for the Year Ended December 31, 2022
 
 
 
Total Revenues
$ 
4,295,115 
$ 
401,125 
$ 
4,696,240 
$ 
407,334 
$ 
5,103,574 
Storage Rental
 
2,606,721 
 
372,208 
 
2,978,929 
 
55,094 
 
3,034,023 
Service
 
1,688,394 
 
28,917 
 
1,717,311 
 
352,240 
 
2,069,551 
Other Reportable Segment Expenses(1)
 
2,407,526 
 
225,503 
 
2,633,029 
Adjusted EBITDA
 
1,887,589 
 
175,622 
 
2,063,211 
Total Assets(2)
 
10,654,650 
 
3,752,088 
 
14,406,738 
 
1,733,776 
 
16,140,514 
(1) Primarily relates to Cost of sales (excluding depreciation and amortization) and Selling, general and administrative expenses for the respective reportable segment.
(2) Excludes all intercompany receivables or payables and investment in subsidiary balances.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
11. SEGMENT INFORMATION (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
119

A reconciliation of Adjusted EBITDA for our reportable segments to total Net Income (Loss) Before Provision (Benefit) for Income 
Taxes for the years ended December 31, 2024, 2023 and 2022 is as follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Total Adjusted EBITDA for Reportable Segments
$ 
2,505,630 
$ 
2,242,982 
$ 
2,063,211 
Add/(Deduct):
Corporate and other
 
(269,250)  
(281,305)  
(236,154) 
Interest expense, net
 
(721,559)  
(585,932)  
(488,014) 
Depreciation and amortization
 
(900,905)  
(776,159)  
(727,595) 
Acquisition and Integration Costs
 
(35,842)  
(25,875)  
(47,746) 
Restructuring and other transformation
 
(161,359)  
(175,215)  
(41,933) 
(Loss) gain on disposal/write-down of property, plant and equipment, net (including 
real estate)
 
(6,196)  
12,825 
 
93,268 
Other (expense) income, net, excluding our share of losses (gains) from our 
unconsolidated joint ventures
 
(39,159)  
(98,891)  
83,268 
Stock-based compensation expense
 
(118,138)  
(73,799)  
(56,861) 
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint 
ventures
 
(8,684)  
(11,425)  
(9,806) 
Total Net Income (Loss) Before Provision (Benefit) for Income Taxes
$ 
244,538 
$ 
227,206 
$ 
631,638 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
11. SEGMENT INFORMATION (CONTINUED)
120
IRON MOUNTAIN 2024 FORM 10-K

Information as to our operations in different geographical areas for the years ended December 31, 2024, 2023 and 2022 is as 
follows:
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Revenues:
 
 
 
United States
$ 
4,008,402 
$ 
3,507,134 
$ 
3,262,755 
United Kingdom
 
426,462 
 
393,917 
 
332,556 
Canada
 
303,184 
 
279,325 
 
270,836 
Remaining Countries
 
1,411,861 
 
1,299,913 
 
1,237,427 
Long-lived Assets: 
 
United States
$ 
11,399,912 
$ 
9,492,911 
$ 
8,925,643 
United Kingdom
 
1,419,582 
 
1,315,715 
 
1,062,641 
Canada
 
612,581 
 
498,511 
 
514,777 
Remaining Countries
 
3,593,818 
 
4,431,120 
 
4,090,308 
Information as to our revenues by product and service lines by segment for the years ended December 31, 2024, 2023 and 2022 is 
as follows:
GLOBAL RIM 
BUSINESS
GLOBAL
 DATA CENTER 
BUSINESS
CORPORATE 
AND OTHER
TOTAL
CONSOLIDATED
For the Year Ended December 31, 2024
 
 
 
Records Management(1)
$ 
3,899,109 
$ 
— 
$ 
162,366 
$ 
4,061,475 
Data Management(1)
 
515,306 
 
— 
 
— 
 
515,306 
Information Destruction(1)(2)(3)
 
565,023 
 
— 
 
388,077 
 
953,100 
Data Center(1) 
 
— 
 
620,028 
 
— 
 
620,028 
For the Year Ended December 31, 2023
Records Management(1)
$ 
3,625,264 
$ 
— 
$ 
146,389 
$ 
3,771,653 
Data Management(1)
 
520,194 
 
— 
 
— 
 
520,194 
Information Destruction(1)(2)(3)
 
516,318 
 
— 
 
177,098 
 
693,416 
Data Center(1) 
 
— 
 
495,026 
 
— 
 
495,026 
For the Year Ended December 31, 2022
Records Management(1)
$ 
3,287,237 
$ 
— 
$ 
137,845 
$ 
3,425,082 
Data Management(1)
 
510,107 
 
— 
 
185 
 
510,292 
Information Destruction(1)(2)(3)
 
497,771 
 
— 
 
269,304 
 
767,075 
Data Center(1) 
 
— 
 
401,125 
 
— 
 
401,125 
(1) Each of these offerings has a component of revenue that is storage rental related and a component that is service related, except for information destruction, which 
does not have a storage rental component.
(2) Information destruction revenue for our Global RIM Business includes secure shredding services.
(3) Information destruction revenue for Corporate and Other includes product revenue from our ALM business.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
11. SEGMENT INFORMATION (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
121

In October 2020, in connection with the formation of the Frankfurt JV, we entered into agreements whereby we earn various fees, 
including (i) special project revenue and (ii) property management and construction and development fees for services we are 
providing to the Frankfurt JV (the "Frankfurt JV Agreements").
In March 2019, in connection with the formation of the MakeSpace JV, we entered into a storage and service agreement with the 
MakeSpace JV to provide certain storage and related services to the MakeSpace JV (the "MakeSpace Agreement"). In February 
2022, in connection with the formation of the Clutter JV, we terminated the MakeSpace Agreement and entered into a storage and 
service agreement with the Clutter JV to provide certain storage and related services to the Clutter JV (the "Clutter Agreement"). 
On June 29, 2023, we completed the Clutter Acquisition and terminated the Clutter Agreement.
Revenue recognized in the accompanying Consolidated Statements of Operations under these agreements for the years ended 
December 31, 2024, 2023 and 2022 is as follows (approximately):
 
YEAR ENDED DECEMBER 31,
 
2024
2023
2022
Frankfurt JV Agreements(1)
$ 
3,000 
$ 
1,800 
$ 
15,000 
MakeSpace Agreement and Clutter Agreement(2)
 
— 
 
13,000 
 
28,500 
(1) Revenue associated with the Frankfurt JV Agreements is presented as a component of our Global Data Center Business segment.
(2) Revenue associated with the MakeSpace Agreement and the Clutter Agreement is presented as a component of our Global RIM Business segment.
13. RESTRUCTURING AND OTHER TRANSFORMATION
PROJECT MATTERHORN
In September 2022, we announced Project Matterhorn. Project Matterhorn investments focus on transforming our operating model 
to a global operating model. Project Matterhorn focuses on the formation of a solution-based sales approach that is designed to 
allow us to optimize our shared services and best practices to better serve our customers' needs. We are investing to accelerate 
growth and to capture a greater share of the large, global addressable markets in which we operate. We have incurred 
approximately $378,500 in Restructuring and other transformation costs from the inception of Project Matterhorn through 
December 31, 2024. We expect to incur approximately $150,000 in costs related to Project Matterhorn during the year ending 
December 31, 2025, at which point the program is expected to be completed. Costs are comprised of (1) restructuring costs, which 
include (i) site consolidation and other related exit costs, (ii) employee severance costs and (iii) certain professional fees 
associated with these activities, and (2) other transformation costs, which include professional fees such as project management 
costs and costs for third party consultants who are assisting in the enablement of our growth initiatives.
Restructuring and other transformation related to Project Matterhorn included in the accompanying Consolidated Statements of 
Operations for the years ended December 31, 2024, 2023 and 2022 and from the inception of Project Matterhorn through 
December 31, 2024 is as follows:
YEAR ENDED 
DECEMBER 31, 2024
YEAR ENDED 
DECEMBER 31, 2023
YEAR ENDED 
DECEMBER 31, 2022
FROM INCEPTION
THROUGH 
DECEMBER 31, 2024
Restructuring
$ 
51,082 $ 
57,319 $ 
13,292 $ 
121,693 
Other transformation
 
110,277  
117,896  
28,641  
256,814 
Restructuring and other transformation
$ 
161,359 $ 
175,215 $ 
41,933 $ 
378,507 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
12. RELATED PARTY TRANSACTIONS
122
IRON MOUNTAIN 2024 FORM 10-K

Restructuring costs for Project Matterhorn, included as a component of Restructuring and other transformation in the 
accompanying Consolidated Statements of Operations, by segment, for the years ended December 31, 2024, 2023 and 2022 and 
from the inception of Project Matterhorn through December 31, 2024 are as follows:
YEAR ENDED 
DECEMBER 31, 2024
YEAR ENDED 
DECEMBER 31, 2023
YEAR ENDED 
DECEMBER 31, 2022
FROM INCEPTION
THROUGH 
DECEMBER 31, 2024
Global RIM Business
$ 
42,130 $ 
46,722 $ 
13,083 $ 
101,935 
Global Data Center Business
 
3,056  
520  
—  
3,576 
Corporate and Other
 
5,896  
10,077  
209  
16,182 
Total restructuring costs
$ 
51,082 $ 
57,319 $ 
13,292 $ 
121,693 
Other transformation costs for Project Matterhorn, included as a component of Restructuring and other transformation in the 
accompanying Consolidated Statements of Operations, by segment, for the years ended December 31, 2024, 2023 and 2022 and 
from the inception of Project Matterhorn through December 31, 2024 are as follows:
YEAR ENDED 
DECEMBER 31, 2024
YEAR ENDED 
DECEMBER 31, 2023
YEAR ENDED 
DECEMBER 31, 2022
FROM INCEPTION
THROUGH 
DECEMBER 31, 2024
Global RIM Business
$ 
38,337 $ 
28,369 $ 
3,901 $ 
70,607 
Global Data Center Business
 
4,798  
4,964  
58  
9,820 
Corporate and Other
 
67,142  
84,563  
24,682  
176,387 
Total other transformation costs
$ 
110,277 $ 
117,896 $ 
28,641 $ 
256,814 
A rollforward of the accrued restructuring costs and accrued other transformation costs, which are included as components of 
Accrued expenses and other current liabilities in our Consolidated Balance Sheets for December 31, 2022 through December 31, 
2024 is as follows:
RESTRUCTURING
OTHER 
TRANSFORMATION
TOTAL 
RESTRUCTURING 
AND OTHER 
TRANSFORMATION
Balance as of December 31, 2022
$ 
1,058 
$ 
7,029 
$ 
8,087 
Amounts accrued
 
57,319 
 
117,895 
 
175,214 
Payments
 
(47,646)  
(100,070)  
(147,716) 
Balance as of December 31, 2023
 
10,731 
 
24,854 
 
35,585 
Amounts accrued
 
51,082 
 
110,277 
 
161,359 
Payments
 
(54,839)  
(122,127)  
(176,966) 
Balance as of December 31, 2024
$ 
6,974 
$ 
13,004 
$ 
19,978 
Table of Contents
            Part IV
IRON MOUNTAIN INCORPORATED
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(CONTINUED)
DECEMBER 31, 2024
(In thousands, except share and per share data)
13. RESTRUCTURING AND OTHER TRANSFORMATION (CONTINUED)
IRON MOUNTAIN 2024 FORM 10-K
123

Schedule III - Schedule of Real Estate and Accumulated Depreciation ("Schedule III") reflects the cost and associated accumulated 
depreciation for the real estate facilities that are owned. The gross cost included in Schedule III includes the cost for land, land 
improvements, buildings, building improvements, data center infrastructure and racking structures. Schedule III does not reflect the 
1,110 leased facilities in our real estate portfolio. In addition, Schedule III does not include any value for financing leases for 
property that is classified as land, buildings, data center infrastructure and building improvements in our consolidated financial 
statements.
The following table presents a reconciliation of the gross amount of real estate assets, as presented in Schedule III below, to the 
sum of the historical book value of land, buildings and building improvements, data center infrastructure, racking structures and 
construction in progress as disclosed in Note 2.i. to Notes to Consolidated Financial Statements as of December 31, 2024:
Gross Amount of Real Estate Assets, As Reported on Schedule III
$ 
6,714,601 
Add (Deduct) Reconciling Items:
Book value of racking structures included in leased facilities(1)
 
1,448,031 
Book value of financing leases(2)
 
335,310 
Book value of construction in progress(3)
 
515,028 
   Book value of other
 
(5,777) 
     Total Reconciling Items
 
2,292,592 
Gross Amount of Real Estate Assets, As Disclosed in Note 2.i.
$ 
9,007,193 
(1) Represents the gross book value of racking structures installed in our 1,110 leased facilities, which is included in historical book value of racking structures in Note 
2.i., but excluded from Schedule III.
(2) Represents the gross book value of buildings, building improvements and data center infrastructure that are subject to financing leases, which are included in the 
historical book value of buildings, building improvements and data center infrastructure in Note 2.i., but excluded from Schedule III.
(3) Represents the gross book value of non-real estate assets that are included in the historical book value of construction in progress assets in Note 2.i. The historical 
book value of real estate assets associated with owned buildings that were related to construction in progress as of December 31, 2024 is included in Schedule III. 
The following table presents a reconciliation of the accumulated depreciation of real estate assets, as presented in Schedule III 
below, to the total accumulated depreciation for all property, plant and equipment presented on our Consolidated Balance Sheet as 
of December 31, 2024:
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III
$ 
1,453,058 
Add (Deduct) Reconciling Items:
Accumulated Depreciation - non-real estate assets(1)
 
1,635,183 
Accumulated Depreciation - racking structures in leased facilities(2)
 
1,126,621 
Accumulated Depreciation - financing leases(3)
 
141,803 
   Accumulated Depreciation - other
 
(2,267) 
     Total Reconciling Items
 
2,901,340 
Accumulated Depreciation, As Reported on Consolidated Balance Sheet
$ 
4,354,398 
(1) Represents the accumulated depreciation of non-real estate assets that is included in the total accumulated depreciation of property, plant and equipment on our 
Consolidated Balance Sheet, but excluded from Schedule III as the assets to which this accumulated depreciation relates are not considered real estate assets 
associated with owned buildings.
(2) Represents the accumulated depreciation of racking structures as of December 31, 2024 installed in our 1,110 leased facilities, which is included in total accumulated 
depreciation of property, plant and equipment on our Consolidated Balance Sheet, but excluded from Schedule III, as disclosed in Footnote 1 to Schedule III. 
(3) Represents the accumulated depreciation of buildings, building improvements and data center infrastructure as of December 31, 2024 that are subject to financing 
leases, which is included in the total accumulated depreciation of property, plant and equipment on our Consolidated Balance Sheet, but excluded from Schedule III, 
as disclosed in Footnote 1 to Schedule III.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION
DECEMBER 31, 2024
(Dollars in thousands)
124
IRON MOUNTAIN 2024 FORM 10-K

(A)
 
(B)
(C)
(D)
(E)
(F)
 
 
REGION/COUNTRY/
STATE/CAMPUS
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT 
CARRIED AT 
CLOSE OF
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America
 
 
 
 
 
 
 
 
United States
(Including Puerto Rico)
 
 
 
 
 
 
1420 North Fiesta 
Blvd, Gilbert, 
Arizona
 
1 
$ 
— 
$ 
1,637 
$ 
2,923 
$ 
4,560 
$ 
2,829 
2001
Up to 40 years
4802 East Van 
Buren, Phoenix, 
Arizona
 
1 
 
— 
 
15,599 
 
506,035 
 
521,634 
 
35,143 
2019
Up to 40 years
615 North 48th 
Street, Phoenix, 
Arizona
 
1 
 
— 
 
423,107 
 
320,893 
 
744,000 
 
108,388 
2018
(5)
Up to 40 years
2955 S. 
18th Place, 
Phoenix, Arizona
 
1 
 
— 
 
12,178 
 
15,203 
 
27,381 
 
9,839 
2007
Up to 40 years
4449 South 
36th St, Phoenix, 
Arizona
 
1 
 
— 
 
7,305 
 
1,204 
 
8,509 
 
5,865 
2012
Up to 40 years
8521 E. Princess 
Drive, Scottsdale, 
Arizona
 
1 
 
— 
 
87,865 
 
7,280 
 
95,145 
 
29,847 
2018
(5)
Up to 40 years
600 Burning Tree 
Rd, Fullerton, 
California
 
1 
 
— 
 
4,762 
 
3,222 
 
7,984 
 
3,577 
2002
Up to 40 years
21063 Forbes St, 
Hayward, 
California
 
1 
 
— 
 
13,407 
 
780 
 
14,187 
 
3,954 
2019
(11)
Up to 40 years
1025 North 
Highland Ave, 
Los Angeles, 
California
 
1 
 
— 
 
10,168 
 
31,438 
 
41,606 
 
20,205 
1988
Up to 40 years
1010 - 1006 
North Mansfield, 
Los Angeles, 
California
 
1 
 
— 
 
749 
 
268 
 
1,017 
 
209 
2014
Up to 40 years
1350 West Grand 
Ave, Oakland, 
California
 
1 
 
— 
 
15,172 
 
7,775 
 
22,947 
 
17,147 
1997
Up to 40 years
1760 North Saint 
Thomas Circle, 
Orange, 
California
 
1 
 
— 
 
4,576 
 
926 
 
5,502 
 
2,475 
2002
Up to 40 years
1915 South 
Grand Ave, Santa 
Ana, California
 
1 
 
— 
 
3,420 
 
1,861 
 
5,281 
 
2,436 
2001
Up to 40 years
2680 Sequoia Dr, 
South Gate, 
California
 
1 
 
— 
 
6,329 
 
3,337 
 
9,666 
 
4,933 
2002
Up to 40 years
336 Oyster Point 
Blvd, South San 
Francisco, 
California
 
1 
 
— 
 
15,100 
 
1,282 
 
16,382 
 
3,394 
2019
(11)
Up to 40 years
3576 N. Moline, 
Aurora, Colorado
 
1 
 
— 
 
1,583 
 
4,611 
 
6,194 
 
2,823 
2001
Up to 40 years
5151 E. 46th Ave, 
Denver, Colorado
 
1 
 
— 
 
6,312 
 
787 
 
7,099 
 
2,612 
2014
Up to 40 years
11333 E 
53rd Ave, Denver, 
Colorado
 
1 
 
— 
 
7,403 
 
11,227 
 
18,630 
 
12,240 
2001
Up to 40 years
4300 Brighton 
Boulevard, 
Denver, Colorado
 
1 
 
— 
 
116,336 
 
37,745 
 
154,081 
 
33,992 
2017
Up to 40 years
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
125

(A)
 
(B)
(C)
(D)
(E)
(F)
 
 
REGION/COUNTRY/
STATE/CAMPUS
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION 
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America (continued)
 
 
 
 
 
 
 
United States
(Including Puerto Rico)
(continued)
 
 
 
 
 
 
 
20 Eastern Park 
Rd, East Hartford, 
Connecticut
 
1 
$ 
— 
$ 
7,417 
$ 
2,160 
$ 
9,577 
$ 
7,093 
2002
Up to 40 years
Kennedy Road, 
Windsor, 
Connecticut
 
2 
 
— 
 
10,447 
 
33,554 
 
44,001 
 
27,974 
2001
Up to 40 years
1400 Johnson 
Way, New Castle, 
Delaware
 
1 
 
— 
 
5,686 
 
601 
 
6,287 
 
539 
2023
(11)
Up to 40 years
150-200 Todds Ln, 
Wilmington, 
Delaware
 
1 
 
— 
 
7,226 
 
1,269 
 
8,495 
 
5,865 
2002
Up to 40 years
3501 Electronics 
Way, West Palm 
Beach, Florida
 
1 
 
— 
 
4,201 
 
15,542 
 
19,743 
 
10,284 
2001
Up to 40 years
5319 Tulane Drive 
SW, Atlanta, 
Georgia
 
1 
 
— 
 
2,808 
 
4,256 
 
7,064 
 
5,013 
2002
Up to 40 years
6111 Live Oak 
Parkway, 
Norcross, Georgia
 
1 
 
— 
 
3,542 
 
3,682 
 
7,224 
 
1,241 
2017
Up to 40 years
2425 South 
Halsted St, 
Chicago, Illinois
 
1 
 
— 
 
7,470 
 
1,861 
 
9,331 
 
5,138 
2006
Up to 40 years
1301 S. Rockwell 
St, Chicago, 
Illinois
 
1 
 
— 
 
7,947 
 
30,285 
 
38,232 
 
19,387 
1999
Up to 40 years
2604 West 
13th St, Chicago, 
Illinois
 
1 
 
— 
 
404 
 
4,282 
 
4,686 
 
3,169 
2001
Up to 40 years
2211 W. Pershing 
Rd, Chicago, 
Illinois
 
1 
 
— 
 
4,264 
 
14,383 
 
18,647 
 
11,415 
2001
Up to 40 years
1680 and 1700 E. 
Touhy Avenue, 
Des Plaines, 
Illinois
 
— 
 
— 
 
2,216 
 
101,058 
 
103,274 
 
2,134 
2023
Up to 40 years
2255 Pratt Blvd, 
Elk Grove, Illinois
 
1 
 
— 
 
1,989 
 
4,101 
 
6,090 
 
2,368 
2000
Up to 40 years
4175 Chandler 
Dr Opus No. Corp, 
Hanover Park, 
Illinois
 
1 
 
— 
 
22,048 
 
4,658 
 
26,706 
 
12,913 
2014
Up to 40 years
2600 Beverly 
Drive, Lincoln, 
Illinois
 
1 
 
— 
 
1,378 
 
967 
 
2,345 
 
577 
2015
Up to 40 years
6090 NE 
14th Street, Des 
Moines, Iowa
 
1 
 
— 
 
622 
 
584 
 
1,206 
 
592 
2003
Up to 40 years
South 7th St, 
Louisville, 
Kentucky
 
4 
 
— 
 
709 
 
16,242 
 
16,951 
 
8,322 
Various
Up to 40 years
26 Parkway Drive 
(fka 133 Pleasant), 
Scarborough, 
Maine
 
1 
 
— 
 
8,337 
 
690 
 
9,027 
 
4,310 
2015
(11)
Up to 40 years
8928 McGaw Ct, 
Columbia, 
Maryland
 
1 
 
— 
 
2,198 
 
6,723 
 
8,921 
 
5,149 
1999
Up to 40 years
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
126
IRON MOUNTAIN 2024 FORM 10-K

(A)
 
(B)
(C)
(D)
(E)
(F)
 
 
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America (continued)
United States
(Including Puerto Rico)
(continued)
32 George St, 
Boston, 
Massachusetts
 
1 
 
— 
 
1,820 
 
5,880 
 
7,700 
 
6,147 
1991
Up to 40 years
3435 Sharps Lot 
Rd, Dighton, 
Massachusetts
 
1 
 
— 
 
1,911 
 
889 
 
2,800 
 
2,302 
1999
Up to 40 years
77 Constitution 
Boulevard, 
Franklin, 
Massachusetts
 
1 
 
— 
 
5,413 
 
503 
 
5,916 
 
1,473 
2014
Up to 40 years
Bearfoot Road, 
Northboro, 
Massachusetts
 
2 
 
— 
 
55,923 
 
18,523 
 
74,446 
 
49,206 
Various
Up to 40 years
6601 Sterling 
Dr South, Sterling 
Heights, Michigan
 
1 
 
— 
 
1,294 
 
1,255 
 
2,549 
 
1,497 
2002
Up to 40 years
3140 Ryder Trail 
South, Earth City, 
Missouri
 
1 
 
— 
 
3,072 
 
3,957 
 
7,029 
 
3,370 
2004
Up to 40 years
Leavenworth 
St/18th St, 
Omaha, 
Nebraska
 
2 
 
— 
 
2,924 
 
20,007 
 
22,931 
 
10,846 
Various
Up to 40 years
4105 North Lamb 
Blvd, Las Vegas, 
Nevada
 
1 
 
— 
 
3,430 
 
11,359 
 
14,789 
 
8,099 
2002
Up to 40 years
17 Hydro Plant 
Rd, Milton, New 
Hampshire
 
1 
 
— 
 
6,179 
 
4,678 
 
10,857 
 
8,295 
2001
Up to 40 years
3003 Woodbridge 
Avenue, Edison, 
New Jersey
 
1 
 
— 
 
310,404 
 
137,462 
 
447,866 
 
80,555 
2018
(5)
Up to 40 years
811 Route 33, 
Freehold, New 
Jersey
 
3 
 
— 
 
38,697 
 
65,578 
 
104,275 
 
68,137 
Various
Up to 40 years
51-69 & 77-81 
Court St, Newark, 
New Jersey
 
1 
 
— 
 
11,734 
 
19,407 
 
31,141 
 
5,209 
2015
Up to 40 years
560 Irvine Turner 
Blvd, Newark, 
New Jersey
 
1 
 
— 
 
9,522 
 
8,538 
 
18,060 
 
2,448 
2015
Up to 40 years
231 Johnson Ave, 
Newark, New 
Jersey
 
1 
 
— 
 
8,945 
 
5,837 
 
14,782 
 
2,477 
2015
Up to 40 years
650 Howard 
Avenue, 
Somerset, New 
Jersey
 
1 
 
— 
 
3,585 
 
12,603 
 
16,188 
 
8,693 
2006
Up to 40 years
100 Bailey Ave, 
Buffalo, New York
 
1 
 
— 
 
1,324 
 
11,596 
 
12,920 
 
8,784 
1998
Up to 40 years
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
127

(A)
 
(B)
(C)
(D)
(E)
(F)
 
 
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America (continued)
United States
(Including Puerto Rico)
(continued)
1368 County Rd 
8, Farmington, 
New York
 
1 
$ 
— 
$ 
2,611 
$ 
5,336 
$ 
7,947 
$ 
5,917 
1998
Up to 40 years
County Rd 10, 
Linlithgo, New 
York
 
2 
 
— 
 
102 
 
3,275 
 
3,377 
 
2,294 
2001
Up to 40 years
Ulster Ave/Route 
9W, Port Ewen, 
New York
 
3 
 
— 
 
23,137 
 
13,121 
 
36,258 
 
27,464 
2001
Up to 40 years
Binnewater Rd, 
Rosendale, New 
York
 
2 
 
— 
 
5,142 
 
12,037 
 
17,179 
 
10,084 
Various
Up to 40 years
220 Wavel St, 
Syracuse, New 
York
 
1 
 
— 
 
2,929 
 
2,856 
 
5,785 
 
3,769 
1997
Up to 40 years
826 Church 
Street, 
Morrisville, North 
Carolina
 
1 
 
— 
 
7,087 
 
1,965 
 
9,052 
 
2,537 
2017
Up to 40 years
1275 East 40th, 
Cleveland, Ohio
 
1 
 
— 
 
3,129 
 
606 
 
3,735 
 
2,520 
1999
Up to 40 years
7208 Euclid 
Avenue, 
Cleveland, Ohio
 
1 
 
— 
 
3,336 
 
5,001 
 
8,337 
 
5,123 
2001
Up to 40 years
3366 South Tech 
Boulevard, 
Miamisburg, Ohio
 
1 
 
— 
 
29,092 
 
2,629 
 
31,721 
 
7,584 
2018
(5)
Up to 40 years
Branchton Rd, 
Boyers, 
Pennsylvania
 
2 
 
— 
 
21,166 
 
300,402 
 
321,568 
 
108,660 
Various
Up to 40 years
800 Carpenters 
Crossings, 
Folcroft, 
Pennsylvania
 
1 
 
— 
 
2,457 
 
1,079 
 
3,536 
 
2,486 
2000
Up to 40 years
Las Flores 
Industrial Park, 
Rio Grande, 
Puerto Rico
 
1 
 
— 
 
4,185 
 
3,965 
 
8,150 
 
5,718 
2001
Up to 40 years
1061 Carolina 
Pines Road, 
Columbia, South 
Carolina
 
1 
 
— 
 
11,776 
 
2,957 
 
14,733 
 
5,762 
2016
(11)
Up to 40 years
2301 Prosperity 
Way, Florence, 
South Carolina
 
1 
 
— 
 
2,846 
 
1,366 
 
4,212 
 
2,048 
2016
(11)
Up to 40 years
Mitchell Street, 
Knoxville, 
Tennessee
 
2 
 
— 
 
718 
 
4,710 
 
5,428 
 
3,064 
Various
Up to 40 years
6005 Dana Way, 
Nashville, 
Tennessee
 
2 
 
— 
 
1,827 
 
13,309 
 
15,136 
 
3,715 
2000
Up to 40 years
Capital Parkway, 
Carrollton, Texas
 
3 
 
— 
 
8,299 
 
1,586 
 
9,885 
 
3,542 
2015
(11)
Up to 40 years
1800 Columbian 
Club Dr, 
Carrolton, Texas
 
1 
 
— 
 
19,673 
 
2,724 
 
22,397 
 
12,147 
2013
Up to 40 years
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
128
IRON MOUNTAIN 2024 FORM 10-K

(A)
 
(B)
(C)
(D)
(E)
(F)
 
 
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America (continued)
United States
(Including Puerto Rico)
(continued)
1905 John 
Connally Dr, 
Carrolton, Texas
 
1 
$ 
— 
$ 
2,174 
$ 
1,013 
$ 
3,187 
$ 
1,811 
2000
Up to 40 years
13425 Branchview 
Ln, Dallas, Texas
 
1 
 
— 
 
3,518 
 
8,369 
 
11,887 
 
9,226 
2001
Up to 40 years
1819 S. Lamar St, 
Dallas, Texas
 
1 
 
— 
 
3,215 
 
2,447 
 
5,662 
 
3,250 
2000
Up to 40 years
2000 Robotics 
Place Suite B, Fort 
Worth, Texas
 
1 
 
— 
 
5,328 
 
8,790 
 
14,118 
 
4,428 
2002
Up to 40 years
1202 Ave R, 
Grand Prairie, 
Texas
 
1 
 
— 
 
8,354 
 
2,358 
 
10,712 
 
7,185 
2003
Up to 40 years
6203 Bingle Rd, 
Houston, Texas
 
1 
 
— 
 
3,188 
 
12,500 
 
15,688 
 
10,476 
2001
Up to 40 years
2600 Center 
Street, Houston, 
Texas
 
1 
 
— 
 
2,840 
 
2,879 
 
5,719 
 
3,282 
2000
Up to 40 years
5707 Chimney 
Rock, Houston, 
Texas
 
1 
 
— 
 
1,032 
 
1,270 
 
2,302 
 
1,365 
2002
Up to 40 years
5249 Glenmont 
Ave, Houston, 
Texas
 
1 
 
— 
 
3,467 
 
2,961 
 
6,428 
 
3,659 
2000
Up to 40 years
15333 Hempstead 
Hwy, Houston, 
Texas
 
3 
 
— 
 
6,327 
 
38,963 
 
45,290 
 
21,759 
2004
Up to 40 years
5757 Royalton Dr, 
Houston, Texas
 
1 
 
— 
 
1,795 
 
1,131 
 
2,926 
 
1,683 
2000
Up to 40 years
9601 West Tidwell, 
Houston, Texas
 
1 
 
— 
 
1,680 
 
3,420 
 
5,100 
 
1,924 
2001
Up to 40 years
7800 Westpark, 
Houston, Texas
 
1 
 
— 
 
6,323 
 
1,831 
 
8,154 
 
2,683 
2015
(11)
Up to 40 years
1665 S. 5350 
West, Salt Lake 
City, Utah
 
1 
 
— 
 
6,239 
 
5,289 
 
11,528 
 
6,879 
2002
Up to 40 years
11052 Lakeridge 
Pkwy, Ashland, 
Virginia
 
1 
 
— 
 
1,709 
 
2,005 
 
3,714 
 
2,494 
1999
Up to 40 years
11660 Hayden 
Road, Manassas, 
Virginia
 
4 
 
— 
 
104,824 
 
1,684,418 
 
1,789,242 
 
78,846 
2020
Up to 40 years
3725 Thirlane Rd. 
N.W., Roanoke, 
Virginia
 
1 
 
— 
 
2,577 
 
300 
 
2,877 
 
1,499 
2015
(11)
Up to 40 years
6110 Technology 
Creek Drive, 
Sandston, Virginia
 
— 
 
— 
 
8,068 
 
86 
 
8,154 
 
— 
2024
Up to 40 years
22445 Randolph 
Dr, Sterling, 
Virginia
 
1 
 
— 
 
7,598 
 
4,510 
 
12,108 
 
7,520 
2005
Up to 40 years
307 South 
140th St, Burien, 
Washington
 
1 
 
— 
 
2,078 
 
2,922 
 
5,000 
 
3,055 
1999
Up to 40 years
 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
129

(A)
(B)
(C)
(D)
(E)
(F)
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
North America (continued)
United States 
(Including Puerto Rico)
(continued)
6600 Hardeson 
Rd, Everett, 
Washington
 
1 
$ 
— 
$ 
5,399 
$ 
4,269 
$ 
9,668 
$ 
4,641 
2002
Up to 40 years
1201 N. 96th St, 
Seattle, 
Washington
 
1 
 
— 
 
4,496 
 
2,655 
 
7,151 
 
4,996 
2001
Up to 40 years
4330 South Grove 
Road, Spokane, 
Washington
 
1 
 
— 
 
3,906 
 
1,405 
 
5,311 
 
1,146 
2015
Up to 40 years
Total United States
 
115 
$ 
— 
$ 
1,665,741 
$ 
3,708,482 
$ 
5,374,223 
$ 
1,101,170 
Canada
One Command 
Court, Bedford
 
1 
$ 
— 
$ 
3,847 
$ 
4,132 
$ 
7,979 
$ 
4,981 
2000
Up to 40 years
195 Summerlea 
Road, Brampton
 
1 
 
— 
 
5,403 
 
6,084 
 
11,487 
 
6,896 
2000
Up to 40 years
10 Tilbury Court, 
Brampton
 
1 
 
— 
 
5,007 
 
16,303 
 
21,310 
 
11,131 
2000
Up to 40 years
8825 Northbrook 
Court, Burnaby
 
1 
 
— 
 
8,091 
 
1,551 
 
9,642 
 
5,343 
2001
Up to 40 years
8088 Glenwood 
Drive, Burnaby
 
1 
 
— 
 
4,326 
 
6,200 
 
10,526 
 
5,953 
2005
Up to 40 years
5811 26th Street 
S.E., Calgary
 
1 
 
— 
 
14,658 
 
10,742 
 
25,400 
 
13,362 
2000
Up to 40 years
3905-101 Street, 
Edmonton
 
1 
 
— 
 
2,020 
 
822 
 
2,842 
 
1,794 
2000
Up to 40 years
68 Grant Timmins 
Drive, Kingston
 
1 
 
— 
 
3,639 
 
291 
 
3,930 
 
840 
2016
Up to 40 years
3005 Boul. Jean-
Baptiste 
Deschamps, 
Lachine
 
1 
 
— 
 
2,751 
 
592 
 
3,343 
 
1,677 
2000
Up to 40 years
1655 Fleetwood, 
Laval
 
1 
 
— 
 
8,196 
 
17,722 
 
25,918 
 
15,840 
2000
Up to 40 years
4005 Richelieu, 
Montreal
 
1 
 
— 
 
1,800 
 
2,336 
 
4,136 
 
2,222 
2000
Up to 40 years
1209 Algoma Rd, 
Ottawa
 
1 
 
— 
 
1,059 
 
10,006 
 
11,065 
 
6,354 
2000
Up to 40 years
235 Edson Street, 
Saskatoon
 
1 
 
— 
 
829 
 
1,499 
 
2,328 
 
1,113 
2008
Up to 40 years
610 Sprucewood 
Ave, Windsor
 
1 
 
— 
 
1,243 
 
579 
 
1,822 
 
991 
2007
Up to 40 years
Total Canada
 
14 
$ 
— 
$ 
62,869 
$ 
78,859 
$ 
141,728 
$ 
78,497 
Total North America
 
129 
$ 
— 
$ 
1,718,326 
$ 
3,797,627 
$ 
5,515,953 
$ 
1,179,667 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
130
IRON MOUNTAIN 2024 FORM 10-K

(A)
(B)
(C)
(D)
(E)
(F)
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST 
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT 
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION 
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN 
LATEST INCOME
STATEMENT IS
COMPUTED
Europe
 
 
 
 
 
 
 
 
Gewerbeparkstr. 
3, Vienna, Austria
 
1 
$ 
— 
$ 
6,542 
$ 
12,139 
$ 
18,681 
$ 
8,490 
2010
Up to 40 years
Stupničke 
Šipkovine 62, 
Zagreb, Croatia
 
1 
 
— 
 
1,408 
 
(620)  
788 
 
13 
2003
Up to 40 years
Kratitirion 9 
Kokkinotrimithia 
Industrial District, 
Nicosia, Cyprus
 
1 
 
— 
 
3,136 
 
2,446 
 
5,582 
 
1,351 
2003
Up to 40 years
Karyatidon 1, 
Agios Sylas 
Industrial Area 
(3rd), Limassol, 
Cyprus
 
1 
 
— 
 
1,935 
 
(180)  
1,755 
 
377 
2018
Up to 40 years
G2-B, 
Engineering 
Square IDG 
Developer’s Area, 
6th Oct City  
Giza, Egypt
 
1 
 
— 
 
8,984 
 
(7,107)  
1,877 
 
832 
2021
(7)
Up to 40 years
65 Egerton Road, 
Birmingham, 
England
 
1 
 
— 
 
6,980 
 
2,276 
 
9,256 
 
5,871 
2003
Up to 40 years
Otterham Quay 
Lane, Gillingham, 
England
 
9 
 
— 
 
7,418 
 
3,520 
 
10,938 
 
6,376 
2004
Up to 40 years
Kemble Industrial 
Park, Kemble, 
England
 
2 
 
— 
 
5,277 
 
6,699 
 
11,976 
 
9,051 
2003
Up to 40 years
Gayton Road, 
Kings Lynn, 
England
 
3 
 
— 
 
3,119 
 
3,546 
 
6,665 
 
3,536 
2003
Up to 40 years
Harpway Lane, 
Sopley, England
 
1 
 
— 
 
681 
 
1,816 
 
2,497 
 
1,621 
2004
Up to 40 years
Unit 1A 
Broadmoor Road, 
Swindon, 
England
 
1 
 
— 
 
2,636 
 
648 
 
3,284 
 
1,562 
2006
Up to 40 years
Jeumont-
Schneider, 
Champagne Sur 
Seine, France
 
3 
 
— 
 
1,750 
 
2,227 
 
3,977 
 
2,673 
2003
Up to 40 years
Bat I-VII Rue de 
Osiers, 
Coignieres, 
France
 
4 
 
— 
 
21,318 
 
(3,963)  
17,355 
 
7,174 
2016
(4)
Up to 40 years
26 Rue de I 
Industrie, 
Fergersheim, 
France
 
1 
 
— 
 
1,322 
 
(38)  
1,284 
 
528 
2016
(4)
Up to 40 years
Bat A, B, C1, C2, 
C3 Rue 
Imperiale, Gue de 
Longroi, France
 
1 
 
— 
 
3,390 
 
519 
 
3,909 
 
1,736 
2016
(4)
Up to 40 years
Le Petit Courtin 
Site de Dois, 
Gueslin, 
Mingieres, 
France
 
1 
 
— 
 
14,141 
 
(1,068)  
13,073 
 
3,862 
2016
(4)
Up to 40 years
ZI des Sables, 
Morangis, France
 
1 
 
— 
 
12,407 
 
11,602 
 
24,009 
 
18,158 
2004
Up to 40 years
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
131

(A)
(B)
(C)
(D)
(E)
(F)
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST 
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO 
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT 
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION 
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN 
LATEST INCOME
STATEMENT IS
COMPUTED
Europe (continued)
 
 
 
 
 
 
 
 
45 Rue de Savoie, 
Manissieux, Saint 
Priest, France
 
1 
$ 
— 
$ 
5,546 
$ 
(138) $ 
5,408 
$ 
1,679 
2016
(4)
Up to 40 years
Heinrich Lanz Alee 
47, Frankfurt, 
Germany
 
1 
 
— 
 
80,951 
 
106,180 
 
187,131 
 
12,375 
2021
(8)
Up to 40 years
Gutenbergstrabe 
55, Hamburg, 
Germany
 
1 
 
— 
 
4,022 
 
548 
 
4,570 
 
1,847 
2016
(4)
Up to 40 years
Brommer Weg 1, 
Wipshausen, 
Germany
 
1 
 
— 
 
3,220 
 
2,732 
 
5,952 
 
3,707 
2006
Up to 40 years
Kilbarry Industrial 
Park, Dublin Hill, 
Cork, Ireland
 
2 
 
— 
 
831 
 
— 
 
831 
 
24 
2024
Up to 40 years
Loughbeg, 
Ringaskiddy, Cork, 
Ireland
 
— 
 
— 
 
868 
 
— 
 
868 
 
— 
2024
Up to 40 years
Warehouse and 
Offices 4 
Springhill, Cork, 
Ireland
 
1 
 
— 
 
9,040 
 
1,935 
 
10,975 
 
6,359 
2014
Up to 40 years
17 Crag Terrace, 
Dublin, Ireland
 
1 
 
— 
 
2,818 
 
720 
 
3,538 
 
1,681 
2001
Up to 40 years
Damastown 
Industrial Park, 
Dublin, Ireland
 
1 
 
— 
 
16,034 
 
6,142 
 
22,176 
 
11,142 
2012
Up to 40 years
Howemoss Drive, 
Aberdeen, 
Scotland
 
2 
 
— 
 
6,970 
 
5,533 
 
12,503 
 
6,716 
Various
Up to 40 years
Nettlehill Road, 
Houston Industrial 
Estate, Livingston, 
Scotland
 
1 
 
— 
 
11,517 
 
27,595 
 
39,112 
 
23,098 
2001
Up to 40 years
Av Madrid s/n 
Poligono Industrial 
Matillas, Alcala de 
Henares, Spain
 
1 
 
— 
 
186 
 
(186)  
— 
 
— 
2014
Up to 40 years
Calle Bronce, 37, 
Chiloeches, Spain
 
1 
 
— 
 
11,011 
 
3,401 
 
14,412 
 
4,837 
2010
Up to 40 years
Calle del Mar 
Egeo, 4, 28830, 
San Fernando de 
Hanares, Madrid, 
Spain
 
1 
 
— 
 
93,370 
 
102,443 
 
195,813 
 
29 
2022
(9)
Up to 40 years
Ctra M.118 , Km.3 
Parcela 3, Madrid, 
Spain
 
1 
 
— 
 
3,981 
 
6,200 
 
10,181 
 
8,109 
2001
Up to 40 years
Plot No. S10501 & 
S10506 Jebel Ali 
Free Zone 
Authority, United 
Arab Emirates
 
1 
 
— 
 
17,000 
 
(3,747)  
13,253 
 
1,908 
2021
(7)
Up to 40 years
Total Europe
 
50 
$ 
— 
$ 
369,809 
$ 
293,820 
$ 
663,629 
$ 
156,722 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
132
IRON MOUNTAIN 2024 FORM 10-K

Azara 1245, 
Buenos Aires, 
Argentina
 
1 
 
— 
 
166 
 
(166)  
— 
 
— 
1998
Up to 40 years
Spegazzini, 
Ezeiza, Buenos 
Aires, Argentina
 
1 
 
— 
 
12,773 
 
(12,592)  
181 
 
69 
2012
Up to 40 years
Av Ernest de 
Moraes 815, Bairro 
Fim do Campo, 
Jarinu, Brazil
 
1 
 
— 
 
12,562 
 
(5,810)  
6,752 
 
2,283 
2016
(4)
Up to 40 years
Rua Peri 80, 
Jundiai, Brazil
 
1 
 
— 
 
8,894 
 
(4,072)  
4,822 
 
1,778 
2016
(4)
Up to 40 years
Francisco de 
Souza e Melo, Rio 
de Janerio, Brazil
 
3 
 
— 
 
1,868 
 
6,150 
 
8,018 
 
3,682 
Various
Up to 40 years
Hortolandia, Sao 
Paulo, Brazil
 
1 
 
— 
 
24,078 
 
(7,472)  
16,606 
 
4,727 
2014
Up to 40 years
El Otoño 398, 
Lampa, Chile
 
1 
 
— 
 
1,612 
 
— 
 
1,612 
 
254 
2015
Up to 40 years
El Taqueral 99, 
Santiago, Chile
 
10 
 
— 
 
2,629 
 
24,062 
 
26,691 
 
12,698 
Various
Up to 40 years
Panamericana 
Norte 18900, 
Santiago, Chile
 
7 
 
— 
 
4,001 
 
11,281 
 
15,282 
 
7,957 
Various
Up to 40 years
Avenida 
Prolongacion 
del Colli 1104, 
Guadalajara, 
Mexico
 
1 
 
— 
 
374 
 
959 
 
1,333 
 
733 
2002
Up to 40 years
Privada Las Flores 
No. 25 (G3), 
Guadalajara, 
Mexico
 
1 
 
— 
 
905 
 
1,158 
 
2,063 
 
646 
2004
Up to 40 years
Tula KM Parque 
de Las, 
Huehuetoca, 
Mexico
 
2 
 
— 
 
19,937 
 
1,791 
 
21,728 
 
6,089 
2016
(4)
Up to 40 years
Carretera 
Pesqueria 
Km2.5(M3), 
Monterrey, Mexico
 
2 
 
— 
 
3,537 
 
2,811 
 
6,348 
 
2,476 
2004
Up to 40 years
Lote 2, Manzana 
A, (T2& T3), 
Toluca, Mexico
 
1 
 
— 
 
2,204 
 
580 
 
2,784 
 
1,328 
2002
Up to 40 years
Prolongacion de la 
Calle 7 (T4), 
Toluca, Mexico
 
1 
 
— 
 
7,544 
 
11,070 
 
18,614 
 
7,217 
2007
Up to 40 years
Panamericana Sur, 
KM 57.5, Lima, 
Peru
 
7 
 
— 
 
1,549 
 
(504)  
1,045 
 
— 
Various
Up to 40 years
Av. Elmer Faucett 
3462, Lima, Peru
 
2 
 
— 
 
4,112 
 
5,892 
 
10,004 
 
5,092 
Various
Up to 40 years
Calle Los 
Claveles-Seccion 
3, Lima, Peru
 
1 
 
— 
 
8,179 
 
25,997 
 
34,175 
 
11,830 
2010
Up to 40 years
Total Latin America
 
46 
$ 
— 
$ 
117,579 
$ 
61,056 
$ 
178,635 
$ 
68,951 
(A)
(B)
(C)
(D)
(E)
(F)
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST 
TO COMPANY(1)
COST 
CAPITALIZED
SUBSEQUENT TO 
ACQUISITION(1)(2)
GROSS AMOUNT
CARRIED AT 
CLOSE OF 
CURRENT 
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF
CONSTRUCTION 
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN 
LATEST INCOME
STATEMENT IS
COMPUTED
Latin America
 
 
 
 
 
 
 
Amancio Alcorta 
2396, Buenos 
Aires, Argentina
 
2 
$ 
— 
$ 
655 
$ 
(79) $ 
576 
$ 
92 
Various
Up to 40 years
 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
133

(A)
(B)
(C)
(D)
(E)
(F)
REGION/COUNTRY/
STATE/CAMPUS 
ADDRESS
FACILITIES(1)
ENCUMBRANCES
INITIAL COST 
TO COMPANY(1)
COST 
CAPITALIZED 
SUBSEQUENT TO
 ACQUISITION(1)(2)
GROSS AMOUNT 
CARRIED AT
 CLOSE OF 
CURRENT 
PERIOD(1)(11)
ACCUMULATED
DEPRECIATION 
AT CLOSE OF
 CURRENT
 PERIOD(1)(2)(11)
DATE OF 
CONSTRUCTION 
OR ACQUIRED(3)
LIFE ON WHICH
DEPRECIATION IN
LATEST INCOME
STATEMENT IS
COMPUTED
Asia Pacific
 
 
 
 
 
 
8 Whitestone 
Drive, Austins 
Ferry, Australia
 
1 
$ 
— 
$ 
681 
$ 
2,161 
$ 
2,842 
$ 
655 
2012
(4)
Up to 40 years
Warehouse No 4, 
Shanghai, China
 
1 
$ 
— 
$ 
1,530 
$ 
991 
$ 
2,521 
$ 
727 
2013
Up to 40 years
No.464, Pattandur 
Agrahara Village, 
Vertex Tech Park, 
India
 
3 
 
— 
 
113,767 
 
77,814 
 
191,581 
 
2,728 
2023
(10)
Up to 40 years
Jalan Karanggan 
Muda Raya No 
59, Bogor, 
Indonesia
 
1 
 
— 
 
7,897 
 
3,779 
 
11,676 
 
3,606 
2017
Up to 40 years
Jl. Amd Projakal 
KM 5.5 Rt 46, Kel. 
Graha Indah, Kec. 
Balikpapan Utara, 
Indonesia
 
1 
 
— 
 
125 
 
(81)  
44 
 
9 
2021
Up to 40 years
1 Serangoon 
North Avenue 6, 
Singapore
 
1 
 
— 
 
58,637 
 
62,018 
 
120,655 
 
27,752 
2018
(6)
Up to 40 years
2 Yung Ho Road, 
Singapore
 
1 
 
— 
 
10,395 
 
842 
 
11,237 
 
5,116 
2016
(4)
Up to 40 years
IC1 69 Moo 2, Soi 
Wat Namdaeng, 
Bangkok, Thailand
 
2 
 
— 
 
13,226 
 
2,604 
 
15,830 
 
7,125 
2016
(4)
Up to 40 years
Total Asia Pacific
 
11 
$ 
— 
$ 
206,258 
$ 
150,128 
$ 
356,386 
$ 
47,718 
Total
 
236 
$ 
— 
$ 
2,422,256 
$ 
4,292,345 
$ 
6,714,601 
$ 
1,453,058 
(1) The above information only includes the real estate facilities that are owned. The gross cost includes the cost for land, land improvements, buildings, building 
improvements, data center infrastructure and racking structures. The listing does not reflect the 1,110 leased facilities in our real estate portfolio. In addition, the 
above information does not include any value for financing leases for property that is classified as land, buildings, building improvements and data center 
infrastructure in our consolidated financial statements.
(2) Amount includes cumulative impact of foreign currency translation fluctuations.
(3) Date of construction or acquired represents the date we constructed the facility or acquired the facility through purchase or acquisition.
(4) Property was acquired in connection with our acquisition of Recall Holdings Limited.
(5) Property was acquired in connection with our acquisition of IO Data Centers, LLC.
(6) Property was acquired in connection with our acquisition of Credit Suisse International and Credit Suisse AG.
(7) Property was acquired in connection with our acquisition of Information Fort, LLC.
(8) Property was acquired in connection with the Frankfurt data center acquisition.
(9) Property was acquired in connection with our acquisition of XData Properties, S.L.U.
(10) Property was acquired in connection with our acquisition of the Web Werks JV.
(11) This date represents the date the categorization of the property was changed from a leased facility to an owned facility.
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
134
IRON MOUNTAIN 2024 FORM 10-K

(12) The following tables present the changes in gross carrying amount of real estate owned and accumulated depreciation for the years ended December 31, 2024 and 
2023:
YEAR ENDED DECEMBER 31,
GROSS CARRYING AMOUNT OF REAL ESTATE
2024
2023
Gross amount at beginning of period
$ 
4,964,366 
$ 
4,461,195 
Additions during period:
Acquisitions
 
— 
 
— 
Discretionary capital projects
 
1,836,648 
 
535,817 
Foreign currency translation fluctuations
 
(73,945)  
5,046 
 
1,762,703 
 
540,863 
Deductions during period:
Cost of real estate sold, disposed or written-down 
 
(14,872)  
(27,830) 
Other adjustments(1)
 
2,404 
 
(9,862) 
 
 
(12,468)  
(37,692) 
Gross amount at end of period
$ 
6,714,601 
$ 
4,964,366 
(1) For the year ended December 31, 2023, this includes the cost of racking structures associated with the facilities sold as part of the sale-leaseback transactions. 
YEAR ENDED DECEMBER 31,
ACCUMULATED DEPRECIATION
2024
2023
Gross amount of accumulated depreciation at beginning of period
$ 
1,305,461 
$ 
1,187,390 
Additions during period:
 
Depreciation
 
183,138 
 
132,423 
Foreign currency translation fluctuations
 
(28,488)  
3,821 
 
154,650 
 
136,244 
Deductions during period:
 
Amount of accumulated depreciation for real estate assets sold, disposed or written-down
 
(10,619)  
(8,856) 
Other adjustments(1)
 
3,566 
 
(9,317) 
 
(7,053)  
(18,173) 
Gross amount of end of period
$ 
1,453,058 
$ 
1,305,461 
(1) For the year ended December 31, 2023, this includes the accumulated depreciation of racking structures associated with the facilities sold as part of the sale-
leaseback transactions.
The aggregate cost of our real estate assets for federal tax purposes at December 31, 2024 was approximately $6,466,579.
ITEM 16. FORM 10-K SUMMARY.
Not applicable. 
Table of Contents
Part IV
IRON MOUNTAIN INCORPORATED
SCHEDULE III—SCHEDULE OF REAL ESTATE AND 
ACCUMULATED DEPRECIATION (CONTINUED)
DECEMBER 31, 2024
(Dollars in thousands)
IRON MOUNTAIN 2024 FORM 10-K
135

INDEX TO EXHIBITS 
Certain exhibits indicated below are incorporated by reference to documents we have filed with the SEC. Each exhibit marked by a 
pound sign (#) is a management contract or compensatory plan. 
3.1
Certificate of Incorporation of the Company, as filed with the Delaware Secretary of State on June 26, 2014, as 
amended on May 31, 2024. (Incorporated by reference to Annex A of the Iron Mountain Incorporated Proxy 
Statement for the Annual Meeting of Stockholders, filed with the SEC on April 19, 2024.)
3.2
Certificate of Merger, filed by the Company, effective as of January 20, 2015. (Incorporated by reference to the 
Company’s Current Report on Form 8-K dated January 21, 2015.)
3.3
Bylaws of the Company. (Incorporated by reference to the Company’s Current Report on Form 8-K dated May 12, 
2023)
4.1
Senior Indenture, dated as of September 18, 2017, among the Company, the Guarantors named therein and Wells 
Fargo Bank, National Association, as trustee, relating to the 4.875% Senior Notes due 2027. (Incorporated by 
reference to the Company’s Current Report on Form 8-K dated September 18, 2017.)
4.2
Senior Indenture, dated as of November 13, 2017, among the Company, the Guarantors named therein, Wells Fargo 
Bank, National Association, as trustee, and Société Générale Bank & Trust, as paying agent, registrar and transfer 
agent, relating to the 3.875% GBP Senior Notes due 2025. (Incorporated by reference to the Company’s Current 
Report on Form 8-K dated November 13, 2017.)
4.3
Senior Indenture, dated as of December 27, 2017, among the Company, the Guarantors named therein and Wells 
Fargo Bank, National Association, as trustee, relating to the 5.25% Senior Notes due 2028. (Incorporated by 
reference to the Company’s Current Report on Form 8-K dated December 27, 2017.)
4.4
Senior Indenture, dated as of September 9, 2019, among the Company, the Subsidiary Guarantors and Wells Fargo 
Bank, National Association, as trustee, relating to the 4.875% Senior Notes due 2029. (Incorporated by reference to 
the Company's Current Report on Form 8-K dated September 9, 2019.)
4.5
Senior Indenture, dated as of June 22, 2020, among the Company, the Guarantors named therein and Wells Fargo 
Bank, National Association, as trustee, relating to the 5.000% Senior Notes due 2028. (Incorporated by reference to 
the Company’s Current Report on Form 8-K dated June 22, 2020.)
4.6
Senior Indenture, dated as of June 22, 2020, among the Company, the Guarantors named therein and Wells Fargo 
Bank, National Association, as trustee, relating to the 5.250% Senior Notes due 2030. (Incorporated by reference to 
the Company’s Current Report on Form 8-K dated June 22, 2020.)
4.7
Senior Indenture, dated as of June 22, 2020, among the Company, the Guarantors named therein and Wells Fargo 
Bank, National Association, as trustee, relating to the 5.625% Senior Notes due 2032. (Incorporated by reference to 
the Company’s Current Report on Form 8-K dated June 22, 2020.)
4.8
Senior Indenture, dated as of August 18, 2020, among the Company, the Guarantors named therein and Wells Fargo 
Bank, National Association, as trustee, relating to the 4.500% Senior Notes due 2031. (Incorporated by reference to 
the Company’s Current Report on Form 8-K dated August 18, 2020.)
4.9
Senior Indenture, dated as of December 28, 2021, among the Issuer, the Company, the Subsidiary Guarantors 
named therein and Computershare Trust Company, N.A. as trustee, relating to the 5.00% Senior Notes due 2032. 
(Incorporated by reference to the Company's Current Report on Form 8-K dated December 28, 2021.)
4.10
2029 Senior Notes Indenture, dated as of May 15, 2023, among the Company, the Subsidiary Guarantors and 
Computershare Trust Company, N.A., as trustee, relating to the 7% Senior Notes due 2029. (Incorporated by 
reference to the Company's Current Report on Form 8-K dated May 15, 2023.)
4.11
Senior Indenture, dated as of December 6, 2024, among the Issuer, the Company, the Subsidiary Guarantors named 
therein and Computershare Trust Company, N.A. as trustee, relating to the 6.25% Senior Notes due 2033.
(Incorporated by reference to the Company's Current Report on Form 8-K dated December 6, 2024.)
4.12
Form of Stock Certificate representing shares of Common Stock, $0.01 par value per share, of the Company. 
(Incorporated by reference to the Company’s Current Report on Form 8-K dated January 21, 2015.)
4.13
Description of Securities. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year 
ended December 31, 2019.)
10.1
2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan. (#) (Incorporated by 
reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2007.)
10.2
First Amendment to 2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan. (#) 
(Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2008.)
10.3
Second Amendment to 2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan. 
(#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 
2024.)
10.4
Third Amendment to 2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan.
(#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 
2012.)
10.5
Fourth Amendment to 2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan. 
(#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 
2012.)
EXHIBIT
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10.6
Fifth Amendment to 2008 Restatement of the Iron Mountain Incorporated Executive Deferred Compensation Plan. (#) 
(Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 
2024.)
10.7
Iron Mountain Incorporated 1995 Stock Incentive Plan, as amended. (#) (Incorporated by reference to Iron Mountain /
DE’s Current Report on Form 8-K dated April 16, 1999.)
10.8
Iron Mountain Incorporated 2002 Stock Incentive Plan. (#) (Incorporated by reference to the Company’s Annual 
Report on Form 10-K for the year ended December 31, 2002.)
10.9
Third Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan. (#) (Incorporated by reference to the 
Company’s Current Report on Form 8-K dated June 11, 2008.)
10.10
Fourth Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan. (#) (Incorporated by reference to the 
Company’s Current Report on Form 8-K dated December 10, 2008.)
10.11
Fifth Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan. (#) (Incorporated by reference to the 
Company’s Current Report on Form 8-K dated June 9, 2010.)
10.12
Sixth Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan. (#) (Incorporated by reference to the 
Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2011.)
10.13
Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (#) (Incorporated by reference to Appendix A to the 
Company's Proxy Statement for the Annual Meeting of Stockholders, filed with the SEC on April 24, 2013.)
10.14
First Amendment to the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (#) (Incorporated by 
reference to the Company's Current Report on Form 8-K dated May 17, 2021.)
10.15
Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan. (#) (Incorporated by reference to Annex C to the 
Iron Mountain Incorporated Proxy Statement for the Special Meeting of Stockholders, filed with the SEC on 
December 23, 2014.)
10.16
First Amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan. (#) (Incorporated by 
reference to the Company’s Current Report on Form 8-K dated May 23, 2017.)
10.17
Second Amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan. (#) (Incorporated by 
reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2018.)
10.18
Third Amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan. (#) (Incorporated by 
reference to the Company's Current Report on Form 8-K dated May 17, 2021.)
10.19
Form of Iron Mountain Incorporated Amended and Restated Non-Qualified Stock Option Agreement. (#) (Incorporated 
by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2004.)
10.20
Form of Iron Mountain Incorporated Incentive Stock Option Agreement. (#) (Incorporated by reference to the 
Company’s Annual Report on Form 10-K for the year ended December 31, 2004.)
10.21
Form of Iron Mountain Incorporated 1995 Stock Incentive Plan Non-Qualified Stock Option Agreement (version 1). (#) 
(Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2004.)
10.22
Form of Iron Mountain Incorporated 1995 Stock Incentive Plan Amended and Restated Iron Mountain Non-Qualified 
Stock Option Agreement. (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year 
ended December 31, 2004.)
10.23
Form of Iron Mountain Incorporated 1995 Stock Incentive Plan Incentive Stock Option Agreement. (#) (Incorporated 
by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2004.)
10.24
Form of Iron Mountain Incorporated 1995 Stock Incentive Plan Non-Qualified Stock Option Agreement (version 2). (#) 
(Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2004.)
10.25
Form of Iron Mountain Incorporated 2002 Stock Incentive Plan Stock Option Agreement (version 2B). (#) 
(Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.)
10.26
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2002 Stock Incentive Plan (version 
3). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 
2013.)
10.27
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2002 Stock Incentive Plan (version 
20). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 
2013.)
10.28
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2002 Stock Incentive Plan (version 
21). (#) (Incorporated by reference to the Company’s Current Report on Form 8-K dated March 19, 2014.)
10.29
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2002 Stock Incentive Plan 
(version 3). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended 
June 30, 2012.)
10.30
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2002 Stock Incentive Plan 
(version 12). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2017.)
10.31
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 1). (#) (Incorporated by reference to the Company’s Annual Report on Form 10 K for the year ended 
December 31, 2014.)
10.32
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 2). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2017.)
EXHIBIT
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137

10.33
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 3). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter 
ended March 31, 2019.)
10.34
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 4). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2021.)
10.35
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 5). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2023.)
10.36
Form of Restricted Stock Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 6). (#) (Filed herewith.)
10.37
Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 1). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2014.)
10.38
Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 2). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2017.)
10.39
Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 3). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended 
March 31, 2019.)
10.40
Form of Stock Option Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and 
Cash Incentive Plan (version 4). (#) (Incorporated by reference to the Company's Annual Report on Form 10-K for the 
year ended December 31, 2019.)
10.41
Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 5). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2021.)
10.42
Form of Stock Option Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 6). (#) (Filed herewith.)
10.43
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 1). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2016.)
10.44
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 2). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2016.)
10.45
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 3). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2017.)
10.46
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 4). (#) (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter 
ended March 31, 2019.)
10.47
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 5). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2021.)
10.48
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 6). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2023.)
10.49
Form of Performance Unit Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive 
Plan (version 7). (#) (Filed herewith)
10.50
Form of Cash Award Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 1). (#) (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended 
December 31, 2023.)
10.51
Form of Cash Award Agreement pursuant to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan 
(version 2). (#) (Filed herewith.)
10.52
Employment Offer Letter, dated November 30, 2012, from the Company to William L. Meaney. (#) (Incorporated by 
reference to the Company’s Current Report on Form 8-K dated December 3, 2012.) 
10.53
Restated Compensation Plan for Non-Employee Directors. (#) (Filed herewith.)
10.54
Iron Mountain Incorporated Director Deferred Compensation Plan. (#) (Incorporated by reference to the Company’s 
Annual Report on Form 10-K for the year ended December 31, 2007.)
10.55
First Amendment to Iron Mountain Incorporated Director Deferred Compensation Plan. (#) (Incorporated by reference 
to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2024.)
10.56
Second Amendment to Iron Mountain Incorporated Director Deferred Compensation Plan. (#) (Incorporated by 
reference to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2024.)
10.57
Third Amendment to Iron Mountain Incorporated Director Deferred Compensation Plan. (#) (Incorporated by 
reference to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2024.)
EXHIBIT
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10.58
The Iron Mountain Companies Severance Plan. (#) (Incorporated by reference to the Company’s Current Report on 
Form 8-K, dated March 13, 2012.)
10.59
Amended and Restated Severance Plan Severance Program No. 1. (#) (Incorporated by reference to the Company’s 
Quarterly Report on Form 10-Q for the quarter ended March 31, 2012.)
10.60
First Amendment to Amended and Restated Severance Plan Severance Program No. 1. (#) (Incorporated by 
reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.)
10.61
Second Amendment to The Iron Mountain Companies Severance Plan Severance Program No. 1. (#) (Incorporated 
by reference to the Company’s Current Report on Form 8-K dated December 19, 2014.)
10.62
Severance Program No. 2. (#) (Incorporated by reference to the Company’s Current Report on Form 8-K dated 
December 3, 2012.)
10.63
Credit Agreement, dated as of June 27, 2011, as amended and restated as of August 21, 2017, among the Company, 
Iron Mountain Information Management, LLC, certain other subsidiaries of the Company party thereto, the lenders 
and other financial institutions party thereto, JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian 
Administrative Agent, and JPMorgan Chase Bank, N.A., as Administrative Agent. (Incorporated by reference to the 
Company’s Current Report on Form 8-K dated August 21, 2017.)
10.64
First Amendment, dated as of December 12, 2017, to Credit Agreement, dated as of June 27, 2011, as amended and 
restated as of August 21, 2017, among the Company, Iron Mountain Information Management, LLC, certain other 
subsidiaries of the Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase 
Bank, N.A., Toronto Branch, as Canadian Administrative Agent, and JPMorgan Chase Bank, N.A., as Administrative 
Agent. (Incorporated by reference to the Company’s Annual Report on Form 10-K for the year ended December 31, 
2017.)
10.65
Second Amendment, dated as of March 22, 2018, to Credit Agreement, dated as of June 27, 2011, as amended and 
restated as of August 21, 2017, among the Company, Iron Mountain Information Management, LLC, certain other 
subsidiaries of the Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase 
Bank, N.A., Toronto Branch, as Canadian Administrative Agent, and JPMorgan Chase Bank, N.A., as Administrative 
Agent. (Incorporated by reference to the Company’s Current Report on Form 8-K dated March 22, 2018.)
10.66
Third Amendment and Refinancing Facility Agreement, dated as of June 4, 2018, to Credit Agreement, dated as of 
June 27, 2011, as amended and restated as of August 21, 2017, among the Company, Iron Mountain Information 
Management, LLC, certain other subsidiaries of the Company party thereto, the lenders and other financial 
institutions party thereto, JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian Administrative Agent, and 
JPMorgan Chase Bank, N.A., as Administrative Agent. (Incorporated by reference to the Company’s Current Report 
on Form 8-K dated June 4, 2018.)
10.67
Fourth Amendment, dated as of December 20, 2019, to Credit Agreement, dated as of June 27, 2011, as amended 
and restated as of August 21, 2017, among the Company, Iron Mountain Information Management, LLC, certain other 
subsidiaries of the Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase 
Bank, N.A., Toronto Branch, as Canadian Administrative Agent, and JPMorgan Chase Bank, N.A., as Administrative 
Agent. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 
2019.)
10.68
Fifth Amendment, dated as of December 12, 2021, to Credit Agreement, dated as of June 27, 2011, as amended and 
restated, among the Company, Iron Mountain Information Management, LLC, certain other subsidiaries of the 
Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase Bank, N.A., 
Toronto Branch, as Canadian Administrative Agent, and JP Morgan Chase Bank, N.A., as Administrative Agent.
(Incorporated by reference to the Company's Current Report on Form 8-K dated December 16, 2021.)
10.69
Amendment and Restatement Agreement, dated as of March 18, 2022, to the Credit Agreement dated as of June 27, 
2011, as amended and restated as of March 18, 2022, among the Company, certain other subsidiaries of the 
Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase Bank, N.A., as 
Administrative Agent, and JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian Administrative Agent. 
(Incorporated by reference to the Company's Current Report on Form 8-K dated March 18, 2022.)
10.70
Incremental Term Loan Activation Notice, dated as of March 22, 2018, among Iron Mountain Information 
Management, LLC and the lenders party thereto. (Incorporated by reference to the Company’s Current Report on 
Form 8-K dated March 22, 2018.)
10.71
Amendment No. 1 to Credit Agreement dated December 28, 2023 to Credit Agreement, among the Company, certain 
other subsidiaries of the Company party thereto, the lenders and other financial institutions party thereto, and 
JPMorgan Chase Bank N.A., as Administrative Agent. (Incorporated by reference to the Company's Current Report 
on Form 8-K dated December 28, 2023.)
10.72
Amendment No. 2 to Credit Agreement dated as of June 7, 2024, by and among the Company, Iron Mountain 
Information Management, LLC and JPMorgan chase Bank, N.A., as Administrative Agent. (Incorporated by reference 
to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2024.)
10.73
Amendment No. 3 to Credit Agreement dated as of July 2, 2024, by and among the Company, certain other 
subsidiaries of the Company party thereto, the lenders and the other financial institutions party thereto, and 
JPMorgan Chase Bank, N.A. as Administrative Agent. (Incorporated by reference to the Company's Current Report 
on Form 8-K dated July 3, 2024.)
10.74
Amendment No. 4 to Credit Agreement dated as of August 19, 2024, by and among the Company, certain other 
subsidiaries of the Company party thereto, the lenders and the other financial institutions party thereto, and 
JPMorgan Chase Bank, N.A. as Administrative Agent. (Incorporated by reference to the Company’s Quarterly Report 
on Form 10-Q for the quarter ended September 30, 2024.)
EXHIBIT
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139

10.75
Amendment No. 5 to Credit Agreement dated as of November 7, 2024, by and among the Company, certain other 
subsidiaries of the Company party thereto, the lenders and the other financial institutions party thereto, and 
JPMorgan Chase Bank, N.A. as Administrative Agent. (Incorporated by reference to the Company’s Current Report 
on Form 8-K dated November 7, 2024.)
19.1
Insider Trading Policy. (Filed herewith.)
21.1
Subsidiaries of the Company. (Filed herewith.)
23.1
Consent of Deloitte & Touche LLP (Iron Mountain Incorporated, Delaware). (Filed herewith.)
31.1
Rule 13a-14(a) Certification of Chief Executive Officer. (Filed herewith.)
31.2
Rule 13a-14(a) Certification of Chief Financial Officer. (Filed herewith.)
32.1
Section 1350 Certification of Chief Executive Officer. (Furnished herewith.)
32.2
Section 1350 Certification of Chief Financial Officer. (Furnished herewith.)
97.1
Clawback Policy. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended 
December 31, 2023.)
101.INS
XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL 
tags are embedded within the Inline XBRL document.
101.SCH
Inline XBRL Taxonomy Extension Schema Document.
101.CAL
Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF
Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB
Inline XBRL Taxonomy Label Linkbase Document.
101.PRE
Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104
Cover Page Interactive Data File. (Formatted as Inline XBRL and contained in Exhibit 101.)
EXHIBIT
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IRON MOUNTAIN 2024 FORM 10-K

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this 
report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
 
IRON MOUNTAIN INCORPORATED
 
By:
 
/s/ DANIEL BORGES
Daniel Borges
Senior Vice President, Chief Accounting Officer
(Principal Accounting Officer)
Dated: February 14, 2025
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons 
on behalf of the registrant and in the capacities and on the dates indicated.
/s/ WILLIAM L. MEANEY
President and Chief Executive Officer and 
Director (Principal Executive Officer)
February 14, 2025
William L. Meaney
 
 
/s/ BARRY A. HYTINEN
 
Executive Vice President and Chief Financial 
Officer (Principal Financial Officer)
 February 14, 2025
Barry A. Hytinen
/s/ DANIEL BORGES
 
Senior Vice President, Chief Accounting 
Officer (Principal Accounting Officer)
 February 14, 2025
Daniel Borges
/s/ JENNIFER M. ALLERTON
 Director
 February 14, 2025
Jennifer M. Allerton
/s/ PAMELA M. ARWAY
 Director
 February 14, 2025
Pamela M. Arway
/s/ CLARKE H. BAILEY
 Director
 February 14, 2025
Clarke H. Bailey
/s/ KENT P. DAUTEN
 Director
 February 14, 2025
Kent P. Dauten
/s/ JUNE YEE FELIX
Director
February 14, 2025
June Y. Felix
/s/ MONTE E. FORD
Director
February 14, 2025
Monte E. Ford
NAME
 
TITLE
 
DATE
Table of Contents
Part IV
IRON MOUNTAIN 2024 FORM 10-K
141

/s/ ANDRE MACIEL
Director
February 14, 2025
Andre Maciel
/s/ ROBIN L. MATLOCK
Director
February 14, 2025
Robin L. Matlock
/s/ WENDY J. MURDOCK
Director
February 14, 2025
Wendy J. Murdock
/s/ WALTER C. RAKOWICH
Director
February 14, 2025
Walter. C. Rakowich
/s/ THEODORE R. SAMUELS
Director
February 14, 2025
Theodore R. Samuels
/s/ DOYLE R. SIMONS
Director
February 14, 2025
Doyle R. Simons
NAME
 
TITLE
 
DATE
Table of Contents
Part IV
142
IRON MOUNTAIN 2024 FORM 10-K

CORPORATE DIRECTORS AND OFFICERS
(As of 03/01/2025)
DIRECTORS
Pamela M. Arway(2),(3),(6)
Chairperson of the Board of Directors 
Iron Mountain Incorporated 
New York, NY
Jennifer Allerton(1),(5)
Retired Executive  
Hoffmann La Roche Ltd 
Basel, Switzerland
Clarke H. Bailey(1),(3),(5)
Retired Executive 
EDCI Holdings, Inc. 
New York, NY
Kent P. Dauten(1),(3),(4)
Chairman 
Keystone Capital 
Deerfield, IL
June Yee Felix(1),(5) 
Retired Executive
IG Group plc
Miami, FL
EXECUTIVE OFFICERS
William L. Meaney 
President and Chief Executive Officer
Jemma Johns
Executive Vice President, 
Chief Human Resources Officer
Barry Hytinen
Executive Vice President and 
Chief Financial Officer
Mark Kidd 
Executive Vice President and  
General Manager, Data Centers and 
ALM
Monte E. Ford(2),(5) 
Principal Partner 
CIO Strategy Exchange 
Westlake, TX
Andre Maciel(1)(5)
Global Chief Financial Officer 
The Kraft Heinz Company 
Chicago, IL
Robin L. Matlock(2),(5)
Retired Executive 
VMware, Inc. 
Palo Alto, CA
William L. Meaney 
President and Chief Executive 
Officer Iron Mountain Incorporated 
Portsmouth, NH
Wendy Murdock(4)
Retired Executive 
MasterCard Worldwide 
New York, NY
Michelle Altamura
Executive Vice President, General 
Counsel and Secretary
Gregory McIntosh  
Executive Vice President, 
Chief Commercial Officer and 
General Manager,  
Global Records and 
Information Management
Mithu Bhargava
Executive Vice President 
and General Manager, Digital 
Business Unit
(1) Member of the Audit Committee (Mr. Rakowich is Chairperson)
(2) Member of the Compensation Committee (Ms. Matlock is Chairperson)
(3) Member of the Nominating and Governance Committee (Mr. Samuels is Chairperson)
(4) Member of the Finance Committee (Mr. Simons is Chairperson)
(5) Member of the Risk and Safety Committee (Mr. Ford is Chairperson)
(6) Independent Chairperson of the Board
Walter C. Rakowich(1),(3),(4)
Retired Executive  
Former CEO of Prologis  
San Francisco, CA
Theodore R. Samuels(3),(4)
Retired Executive 
Capital Guardian Trust Company 
Washington, DC
Doyle R. Simons(2),(4)
Retired Executive 
Former CEO of Weyerhaeuser 
Seattle, WA

CORPORATE INFORMATION
STOCKHOLDER INFORMATION
Transfer Agent and Registrar 
Computershare 
877/897-6892 
201/680-6578 
(outside the United States, 
US territories & Canada) 
800/231-5469 (hearing impaired—TDD phone) 
shrrelations@cpushareownerservices.com 
www.computershare.com/investor
Address stockholder inquiries and send certificates 
for transfer and address changes to: 
Iron Mountain Incorporated 
c/o Computershare Investor Services 
P.O. Box 43078, Providence, RI 02940-3078
Overnight delivery
Computershare Investor Services 
150 Royall Street, Suite 101 
Canton, MA 02021
Copies of the Annual Report on Form 10-K 
are available upon request by contacting 
the company at the address below, 
attention: Investor Relations
Corporate Headquarters 
Iron Mountain Incorporated 
Corporate Mailing Address 
Iron Mountain Incorporated
1101 Enterprise Drive 
Royersford, PA 19468
85 New H  
Portsmouth, NH   03801
800-935-6966
www.ironmountain.com
Common Stock Data
Traded: NYSE Symbol: IRM 
Shares outstanding: 
Investor Relations 
Mark Rupe
Senior Vice President, Investor Relations 
Iron Mountain Incorporated 
215-402-7013
Annual Meeting Date
Iron Mountain Incorporated will conduct 
its annual meeting of stockholders on 
Thursday, May 29, 2025, 9:00am ET 
via live audio webcast, accessed by visiting 
https://www.virtualshareholdermeeting.com/IRM2025
Independent Registered Public Accounting Firm 
Deloitte & Touche LLP 
115 Federal Street 
Boston, MA 02110
ampshire Avenue, Suite 150
294,968,183 as of April 1, 2025

OPERATIONAL LOCATIONS
(As of 12/31/2024)
Asia Pacific
Australia 
China
Bahrain
Egypt
India
Indonesia
Malaysia
New Zealand
Philippines
Singapore
South Korea
Thailand
Vietnam
Europe
Austria
Belgium
Bulgaria
Croatia
Cyprus
Czech Republic
Denmark
England
Estonia
Eswatini
Finland
France
Germany
Greece
Hungary 
Jordan
Kuwait
Latvia
Lesotho 
Lithuania 
Morocco 
Netherlands 
Northern Ireland 
Norway
Oman
Poland
Qatar
Republic of Ireland 
Romania 
Saudi Arabia 
Scotland
Serbia
Slovakia
South Africa
Spain
Sweden 
Switzerland 
Turkey
Ukraine
United Arab Emirates
Latin America
Argentina
Brazil
Chile
Colombia
Mexico
Peru
North America
Canada
United States
IRM STOCK PERFORMANCE
COMPARISON OF 60 MONTH CUMULATIVE TOTAL RETURN AMONG IRON MOUNTAIN, 
THE MSCI REIT INDEX, THE S&P 500 AND THE RUSSELL 1000
Note: Fiscal year end December 31, 2024
Source: S&P Capital IQ Pro
This graph compares the change in the cumulative total return on our common stock to the cumulative total returns of the S&P 500 
Index, the Russell 1000 Index and the MSCI REIT Index for the period from December 31, 2019, through December 31, 2024.
-50
0
50
100
150
200
250
300
350
400
450
12/31/2019
12/31/2020
12/31/2021
12/31/2022
12/31/2023
12/31/2024
Total Return (%)
S&P 500
Russell 1000
RMZ
IRM