10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

(Mark One)
☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended September 30, 2022

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	23-2588479
(State or other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

One Federal Street, Boston, Massachusetts 02110

(Address of Principal Executive Offices, Including Zip Code)

(617) 535-4766

(Registrant's Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $.01 par value	IRM	NYSE

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, a 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	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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 October 28, 2022, the registrant had 290,714,037 outstanding shares of common stock, $.01 par value.

IRON MOUNTAIN INCORPORATED

2022 FORM 10-Q QUARTERLY REPORT

TABLE OF CONTENTS

PART I—FINANCIAL INFORMATION
	1	ITEM 1.	Unaudited Condensed Consolidated Financial Statements
		2	Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021
		3	Condensed Consolidated Statements of Operations for the Three Months Ended September 30, 2022 and 2021
		4	Condensed Consolidated Statements of Operations for the Nine Months Ended September 30, 2022 and 2021
		5	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months Ended September 30, 2022 and 2021
		6	Condensed Consolidated Statements of Equity for the Three and Nine Months Ended September 30, 2022
		7	Condensed Consolidated Statements of Equity for the Three and Nine Months Ended September 30, 2021
		8	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2022 and 2021
		9	Notes to Condensed Consolidated Financial Statements
	33	ITEM 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations
	55	ITEM 4.	Controls and Procedures
PART II—OTHER INFORMATION
	57	ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds
	57	ITEM 6.	Exhibits
	58	Signatures

    

PART I. FINANCIAL INFORMATION

ITEM 1. UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 1

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA) (UNAUDITED)

	SEPTEMBER 30, 2022		DECEMBER 31, 2021
ASSETS
Current Assets:
Cash and cash equivalents	$	155,223	$	255,828
Accounts receivable (less allowances of $52,695 and $62,009 as of September 30, 2022 and December 31, 2021, respectively)	1,133,596		961,419
Prepaid expenses and other	268,030		224,020
Total Current Assets	1,556,849		1,441,267
Property, Plant and Equipment:
Property, plant and equipment	8,794,078		8,647,303
Less—Accumulated depreciation	(4,063,636)		(3,979,159)
Property, Plant and Equipment, Net	4,730,442		4,668,144
Other Assets, Net:
Goodwill	4,831,306		4,463,531
Customer and supplier relationships and other intangible assets	1,444,924		1,181,043
Operating lease right-of-use assets	2,556,253		2,314,422
Other	574,942		381,624
Total Other Assets, Net	9,407,425		8,340,620
Total Assets	$	15,694,716	$	14,450,031
LIABILITIES AND EQUITY
Current Liabilities:
Current portion of long-term debt	$	81,275	$	309,428
Accounts payable	432,384		369,145
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	929,566		1,032,537
Deferred revenue	282,687		307,470
Total Current Liabilities	1,725,912		2,018,580
Long-term Debt, net of current portion	10,228,846		8,962,513
Long-term Operating Lease Liabilities, net of current portion	2,405,751		2,171,472
Other Long-term Liabilities	398,830		144,053
Deferred Income Taxes	307,717		223,934
Commitments and Contingencies
Redeemable Noncontrolling Interests	93,821		72,411
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 290,687,942 and 289,757,061 shares as of September 30, 2022 and December 31, 2021, respectively)	2,907		2,898
Additional paid-in capital	4,445,988		4,412,553
(Distributions in excess of earnings) Earnings in excess of distributions	(3,330,213)		(3,221,152)
Accumulated other comprehensive items, net	(589,481)		(338,347)
Total Iron Mountain Incorporated Stockholders' Equity	529,201		855,952
Noncontrolling Interests	4,638		1,116
Total Equity	533,839		857,068
Total Liabilities and Equity	$	15,694,716	$	14,450,031

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 2

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED)

	THREE MONTHS ENDED SEPTEMBER 30,
	2022		2021
Revenues:
Storage rental	$	760,370	$	718,614
Service	526,575		411,534
Total Revenues	1,286,945		1,130,148
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	546,041		481,663
Selling, general and administrative	285,299		241,596
Depreciation and amortization	175,077		174,818
Acquisition and Integration Costs	5,554		1,138
Restructuring charges	3,382		50,432
(Gain) Loss on disposal/write-down of property, plant and equipment, net	(14,170)		(935)
Total Operating Expenses	1,001,183		948,712
Operating Income (Loss)	285,762		181,436
Interest Expense, Net (includes Interest Income of $2,176 and $2,160 for the three months ended September 30, 2022 and 2021, respectively)	121,767		103,809
Other (Income) Expense, Net	(52,870)		(18,501)
Net Income (Loss) Before Provision (Benefit) for Income Taxes	216,865		96,128
Provision (Benefit) for Income Taxes	23,934		28,017
Net Income (Loss)	192,931		68,111
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767		428
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	192,164	$	67,683
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic	$	0.66	$	0.23
Diluted	$	0.66	$	0.23
Weighted Average Common Shares Outstanding—Basic	290,937		289,762
Weighted Average Common Shares Outstanding—Diluted	292,552		291,482

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 3

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED)

	NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021
Revenues:
Storage rental	$	2,264,566	$	2,144,942
Service	1,559,959		1,187,002
Total Revenues	3,824,525		3,331,944
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	1,649,139		1,408,151
Selling, general and administrative	861,416		760,098
Depreciation and amortization	536,946		507,145
Acquisition and Integration Costs	38,093		3,415
Restructuring charges	3,382		129,686
(Gain) Loss on disposal/write-down of property, plant and equipment, net	(66,124)		(134,321)
Total Operating Expenses	3,022,852		2,674,174
Operating Income (Loss)	801,673		657,770
Interest Expense, Net (includes Interest Income of $5,995 and $5,858 for the nine months ended September 30, 2022 and 2021, respectively)	351,266		313,451
Other (Income) Expense, Net	(38,186)		(200,018)
Net Income (Loss) Before Provision (Benefit) for Income Taxes	488,593		544,337
Provision (Benefit) for Income Taxes	52,097		153,073
Net Income (Loss)	436,496		391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	1,952		2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	434,544	$	388,571
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic	$	1.49	$	1.34
Diluted	$	1.49	$	1.34
Weighted Average Common Shares Outstanding—Basic	290,673		289,255
Weighted Average Common Shares Outstanding—Diluted	292,294		290,697

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 4

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(IN THOUSANDS) (UNAUDITED)

	THREE MONTHS ENDED SEPTEMBER 30,
	2022		2021
Net Income (Loss)	$	192,931	$	68,111
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(175,098)		(91,263)
Change in Fair Value of Derivative Instruments	32,233		14,665
Total Other Comprehensive (Loss) Income:	(142,865)		(76,598)
Comprehensive Income (Loss)	50,066		(8,487)
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	408		(370)
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$	49,658	$	(8,117)

	NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021
Net Income (Loss)	$	436,496	$	391,264
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(335,431)		(115,075)
Change in Fair Value of Derivative Instruments	83,210		35,505
Total Other Comprehensive (Loss) Income	(252,221)		(79,570)
Comprehensive Income (Loss)	184,275		311,694
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	865		1,683
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$	183,410	$	310,011

The accompanying notes are an integral part of these condensed consolidated financial statements

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 5

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(IN THOUSANDS, EXCEPT SHARE DATA) (UNAUDITED)

THREE MONTHS ENDED SEPTEMBER 30, 2022
			IRON MOUNTAIN INCORPORATED STOCKHOLDERS' 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, June 30, 2022	$	651,775	290,679,958	$	2,907	$	4,432,009	$	(3,340,992)	$	(446,975)	$	4,826	$	93,957
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	13,979		7,984	—		13,979		—		—		—		—
Parent cash dividends declared	(181,385)		—	—		—		(181,385)		—		—		—
Foreign currency translation adjustment	(175,061)		—	—		—		—		(174,739)		(322)		(37)
Change in fair value of derivative instruments	32,233		—	—		—		—		32,233		—		—
Net income (loss)	192,298		—	—		—		192,164		—		134		633
Noncontrolling interests dividends	—		—	—		—		—		—		—		(732)
Balance, September 30, 2022	$	533,839	290,687,942	$	2,907	$	4,445,988	$	(3,330,213)	$	(589,481)	$	4,638	$	93,821
NINE MONTHS ENDED SEPTEMBER 30, 2022
			IRON MOUNTAIN INCORPORATED STOCKHOLDERS' 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 and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	36,939		930,881	9		36,930		—		—		—		—
Changes in equity related to noncontrolling interests	2,626		—	—		(1,009)		—		—		3,635		1,009
Parent cash dividends declared	(543,605)		—	—		—		(543,605)		—		—		—
Foreign currency translation adjustment	(334,825)		—	—		—		—		(334,344)		(481)		(606)
Change in fair value of derivative instruments	83,210		—	—		—		—		83,210		—		—
Net income (loss)	434,912		—	—		—		434,544		—		368		1,584
Noncontrolling interests equity contributions and related costs	(2,486)		—	—		(2,486)		—		—		—		21,547
Noncontrolling interests dividends	—		—	—		—		—		—		—		(2,124)
Balance, September 30, 2022	$	533,839	290,687,942	$	2,907	$	4,445,988	$	(3,330,213)	$	(589,481)	$	4,638	$	93,821

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 6

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(IN THOUSANDS, EXCEPT SHARE DATA) (UNAUDITED)

THREE MONTHS ENDED SEPTEMBER 30, 2021
			IRON MOUNTAIN INCORPORATED STOCKHOLDERS' 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, June 30, 2021	$	1,147,742	289,458,768	$	2,895	$	4,392,396	$	(2,988,896)	$	(258,653)	—		$	64,660
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	14,857		87,378	—		14,857		—		—		—		—
Change in equity related to redeemable noncontrolling interests	—		—	—		—		—		—		—		168
Parent cash dividends declared	(180,600)		—	—		—		(180,600)		—		—		—
Foreign currency translation adjustment	(90,512)		—	—		—		—		(90,465)		(47)		(751)
Change in fair value of derivative instruments	14,665		—	—		—		—		14,665		—		—
Net income (loss)	67,683		—	—		—		67,683		—		—		428
Noncontrolling interests dividends	—		—	—		—		—		—		—		(597)
Purchase of noncontrolling interests	1,311		—	—		—		—		—		1,311		—
Redemption of noncontrolling interests	—		—	—		—		—		—		—		(2,518)
Balance, September 30, 2021	$	975,146	289,546,146	$	2,895	$	4,407,253	$	(3,101,813)	$	(334,453)	$	1,264	$	61,390
NINE MONTHS ENDED SEPTEMBER 30, 2021
			IRON MOUNTAIN INCORPORATED STOCKHOLDERS' 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, 2020	$	1,136,729	288,273,049	$	2,883	$	4,340,078	$	(2,950,339)	$	(255,893)	—		$	59,805
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	66,507		1,273,097	12		66,495		—		—		—		—
Change in equity related to redeemable noncontrolling interests	680		—	—		680		—		—		—		(512)
Parent cash dividends declared	(540,045)		—	—		—		(540,045)		—		—		—
Foreign currency translation adjustment	(114,112)		—	—		—		—		(114,065)		(47)		(963)
Change in fair value of derivative instruments	35,505		—	—		—		—		35,505		—		—
Net income (loss)	388,571		—	—		—		388,571		—		—		2,693
Noncontrolling interests equity contributions	—		—	—		—		—		—		—		2,200
Noncontrolling interests dividends	—		—	—		—		—		—		—		(1,882)
Purchase of noncontrolling interests	1,311		—	—		—		—		—		1,311		2,567
Redemption of noncontrolling interests	—		—	—		—		—		—		—		(2,518)
Balance, September 30, 2021	$	975,146	289,546,146	$	2,895	$	4,407,253	$	(3,101,813)	$	(334,453)	$	1,264	$	61,390

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 7

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(IN THOUSANDS) (UNAUDITED)

	NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021
Cash Flows from Operating Activities:
Net income (loss)	$	436,496	$	391,264
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	350,626		347,269
Amortization (includes amortization of deferred financing costs and discounts of $13,536 and $12,470 for the nine months ended September 30, 2022 and 2021, respectively)	199,856		172,346
Revenue reduction associated with amortization of customer inducements and above- and below-market leases	5,532		6,578
Stock-based compensation expense	45,923		46,852
(Benefit) provision for deferred income taxes	(22,991)		36,333
Loss on early extinguishment of debt	671		—
Gain on IPM divestment	—		(180,569)
(Gain) loss on disposal/write-down of property, plant and equipment, net	(66,124)		(134,321)
Loss associated with OSG deconsolidation	105,825		—
Gain associated with Clutter Transaction	(35,821)		—
Foreign currency transactions and other, net	(101,329)		(13,239)
(Increase) decrease in assets	(219,173)		(112,753)
(Decrease) increase in liabilities	(139,136)		(96,423)
Cash Flows from Operating Activities	560,355		463,337
Cash Flows from Investing Activities:
Capital expenditures	(596,801)		(418,976)
Cash paid for acquisitions, net of cash acquired	(724,213)		(203,752)
Acquisition of customer relationships	(1,901)		(4,800)
Customer inducements	(4,288)		(5,148)
Contract fulfillment costs	(49,874)		(43,699)
Investments in joint ventures and other investments	(46,100)		(72,153)
Net proceeds from IPM Divestment	—		213,878
Proceeds from sales of property and equipment and other, net	119,417		214,865
Cash Flows from Investing Activities	(1,303,760)		(319,785)
Cash Flows from Financing Activities:
Repayment of revolving credit facility, term loan facilities and other debt	(8,038,964)		(2,622,555)
Proceeds from revolving credit facility, term loan facilities and other debt	9,240,478		3,037,476
Debt financing and equity contribution from noncontrolling interests	21,547		—
Debt repayment and equity distribution to noncontrolling interests	(2,124)		(1,882)
Repurchase of noncontrolling interest	—		(75,000)
Parent cash dividends	(544,069)		(538,902)
Net (payments) proceeds associated with employee stock-based awards	(8,984)		19,655
Other, net	(9,437)		3,621
Cash Flows from Financing Activities	658,447		(177,587)
Effect of Exchange Rates on Cash and Cash Equivalents	(15,647)		(9,589)
(Decrease) increase in Cash and Cash Equivalents	(100,605)		(43,624)
Cash and Cash Equivalents, Beginning of Period	255,828		205,063
Cash and Cash Equivalents, End of Period	$	155,223	$	161,439
Supplemental Information:
Cash Paid for Interest	$	410,851	$	395,355
Cash Paid for Income Taxes, Net	$	77,765	$	96,174
Non-Cash Investing and Financing Activities:
Financing Leases	$	18,774	$	40,590
Accrued Capital Expenditures	$	137,802	$	60,418
Deferred Purchase Obligation, Purchase Price Holdbacks and Other	$	279,734	$	—
Dividends Payable	$	190,095	$	189,010

The accompanying notes are an integral part of these condensed consolidated financial statements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 8

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share data) (Unaudited)

1. GENERAL

The unaudited condensed consolidated financial statements of Iron Mountain Incorporated, a Delaware corporation ("IMI"), and its subsidiaries ("we" or "us"), have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (the "SEC"). Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to those rules and regulations, but we believe that the disclosures included herein are adequate to make the information presented not misleading. The interim condensed consolidated financial statements are presented herein and, in the opinion of management, reflect all adjustments of a normal recurring nature necessary for a fair presentation. Interim results are not necessarily indicative of results for a full year.

The Condensed Consolidated Financial Statements and Notes thereto, which are included herein, should be read in conjunction with the Consolidated Financial Statements and Notes thereto for the year ended December 31, 2021 included in Exhibit 99.1 of our Current Report on Form 8-K filed with the SEC on August 4, 2022 (our "Current Report").

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. 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.

B. ACCOUNTS RECEIVABLE

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. The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2022 is as follows:

Balance as of December 31, 2021	$	62,009
Credit memos charged to revenue	41,722
Allowance for bad debts charged to expense	10,691
Deductions and other(1)	(61,727)
Balance as of September 30, 2022	$	52,695

(1)Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 9

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

C. INVENTORY

Inventories are stated at the lower of cost or net realizable value, based on a first-in, first-out methodology. Our inventory primarily consists of information technology-related assets including memory, central processing units, hard drives, adaptors and networking. All of our inventory is considered finished goods. Inventory is included as a component of Prepaid expenses and other in our Condensed Consolidated Balance Sheets. At September 30, 2022, we have inventory of approximately $14,565, net of related reserves for obsolete, excess and slow-moving inventory, related to our asset lifecycle management ("ALM") business. We had no inventory as of December 31, 2021.

D. LEASES

We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2022 and December 31, 2021 are as follows:

DESCRIPTION	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Assets:
Operating lease right-of-use assets	$	2,556,253	$	2,314,422
Financing lease right-of-use assets, net of accumulated depreciation(1)	250,627		298,049
Liabilities:
Current
Operating lease liabilities	$	270,311	$	259,597
Financing lease liabilities(1)	34,622		41,168
Long-term
Operating lease liabilities	$	2,405,751	$	2,171,472
Financing lease liabilities(1)	276,627		315,561

(1)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 Condensed Consolidated Balance Sheets.

The components of the lease expense for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Operating lease cost(1)	$	145,293	$	140,551	$	428,686	$	408,312
Financing lease cost:
Depreciation of financing lease right-of-use assets	$	10,186	$	14,006	$	32,218	$	39,062
Interest expense for financing lease liabilities	4,126		5,055		13,163		14,940

(1)Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $30,730 and $89,647 for the three and nine months ended September 30, 2022, respectively, and $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 10

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

Other information: Supplemental cash flow information relating to our leases for the nine months ended September 30, 2022 and 2021 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30,
CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES:	2022		2021
Operating cash flows used in operating leases	$	302,442	$	291,535
Operating cash flows used in financing leases (interest)	13,163		14,940
Financing cash flows used in financing leases	29,254		35,360
NON-CASH ITEMS:
Operating lease modifications and reassessments	$	145,133	$	103,158
New operating leases (including acquisitions and sale-leaseback transactions)	485,673		240,822

E. GOODWILL

Our reporting units as of December 31, 2021 are described in detail in Note 2.k. to Notes to Consolidated Financial Statements included in our Current Report.

The goodwill associated with acquisitions completed during the first nine months of 2022 (as described in Note 3) has been incorporated into our current reporting units.

The changes in the carrying value of goodwill attributable to each reportable segment for the nine months ended September 30, 2022 are as follows:

	GLOBAL RIM BUSINESS		GLOBAL DATA CENTER BUSINESS		CORPORATE AND OTHER BUSINESS		TOTAL CONSOLIDATED
Goodwill balance, net of accumulated amortization as of December 31, 2021(1)	$	3,972,852	$	426,074	$	64,605	$	4,463,531
Tax deductible goodwill acquired during the year	—		—		762		762
Non-tax deductible goodwill acquired during the period	696		—		585,444		586,140
Fair value and other adjustments(2)	(12,101)		—		384		(11,717)
Currency effects	(186,056)		(18,287)		(3,067)		(207,410)
Goodwill balance, net of accumulated amortization as of September 30, 2022	$	3,775,391	$	407,787	$	648,128	$	4,831,306
Accumulated goodwill impairment balance as of September 30, 2022	$	132,409	$	—	$	26,011	$	158,420

(1)The balances as of December 31, 2021 have been recast to reflect the segment changes described in our Current Report.

(2)This amount primarily represents an adjustment to goodwill as a result of the deconsolidation of certain businesses, as described in Note 2.l.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 11

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

F. FAIR VALUE MEASUREMENTS

The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2022 and December 31, 2021 are as follows:

			FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2022 USING
DESCRIPTION	TOTAL CARRYING VALUE AT SEPTEMBER 30, 2022		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	18,861	$	—	$	18,861	$	—
Time Deposits	1,123		—		1,123		—
Trading Securities	9,085		9,049		36		—
Derivative Assets	85,887		—		85,887		—
Deferred Purchase Obligation (as defined in Note 3)	275,100		—		—		275,100

			FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2021 USING
DESCRIPTION	TOTAL CARRYING VALUE AT DECEMBER 31, 2021		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	101,022	$	—	$	101,022	$	—
Time Deposits	2,238		—		2,238		—
Trading Securities	11,147		11,062		85		—
Derivative Assets	11,021		—		11,021		—
Derivative Liabilities	8,344		—		8,344		—

There were no material items that are measured at fair value on a non-recurring basis at September 30, 2022 and December 31, 2021, other than (i) those disclosed in Note 2.o. to Notes to Consolidated Financial Statements included in our Current Report, (ii) assets acquired and liabilities assumed through our acquisitions that occurred during the nine months ended September 30, 2022, (iii) our initial investment in the Clutter JV and our additional investment in the Web Werks JV (each as defined in Note 4), and (iv) the fair value of our retained investment of our deconsolidated businesses (as described in Note 2.l.), all of which are based on Level 3 inputs. The fair value of the Deferred Purchase Obligation associated with the ITRenew Transaction (as defined in Note 3) was determined utilizing a Monte-Carlo model and takes into account our forecasted projections as it relates to the underlying performance of the business. There has been no material change in the fair value of the Deferred Purchase Obligation since our initial analysis.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 12

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

G. ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET

The changes in Accumulated other comprehensive items, net for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30, 2022						THREE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(500,629)	$	53,654	$	(446,975)	$	(229,790)	$	(28,863)	$	(258,653)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)		—		(174,739)		(90,465)		—		(90,465)
Change in fair value of derivative instruments	—		32,233		32,233		—		14,665		14,665
Total other comprehensive (loss) income	(174,739)		32,233		(142,506)		(90,465)		14,665		(75,800)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

	NINE MONTHS ENDED SEPTEMBER 30, 2022						NINE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(341,024)	$	2,677	$	(338,347)	$	(206,190)	$	(49,703)	$	(255,893)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(334,344)		—		(334,344)		(114,065)		—		(114,065)
Change in fair value of derivative instruments	—		83,210		83,210		—		35,505		35,505
Total other comprehensive (loss) income	(334,344)		83,210		(251,134)		(114,065)		35,505		(78,560)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

H. REVENUES

The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, "Contract Fulfillment Costs"). Contract Fulfillment Costs as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT		GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT
Intake Costs asset	$	63,856	$	(40,045)	$	23,811	$	71,336	$	(42,678)	$	28,658
Commissions asset	124,081		(54,948)		69,133		114,791		(50,553)		64,238

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 13

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows:

DESCRIPTION	LOCATION IN BALANCE SHEET	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Deferred revenue - Current	Deferred revenue	$	282,687	$	307,470
Deferred revenue - Long-term	Other Long-term Liabilities	31,234		33,691

DATA CENTER LESSOR CONSIDERATIONS

Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Codification ("ASC") No. 842 ("ASC 842"), Leases, as amended. Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Storage rental revenue(1)	$	96,328	$	72,411	$	273,547	$	210,805

(1)Revenue associated with power and connectivity included within storage rental revenue was $34,621 and $93,652 for the three and nine months ended September 30, 2022, respectively, and $14,639 and $42,333 for the three and nine months ended September 30, 2021, respectively.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 14

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

I. STOCK-BASED COMPENSATION

Our stock-based compensation expense includes the cost of stock options, restricted stock units ("RSUs"), performance units ("PUs") and shares of stock issued under our employee stock purchase plan ("ESPP") (together, the "Employee Stock-Based Awards").

2022 RETIREMENT ELIGIBLE CRITERIA

For our Employee Stock-Based Awards made on or after March 1, 2022, we have included the following retirement provision:

•Upon an award recipient'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

Stock-based compensation expense for the Employee Stock-Based Awards for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	14,326	$	13,200	$	45,923	$	46,852

As of September 30, 2022, unrecognized compensation cost related to the unvested portion of our Employee Stock-Based Awards is $52,664.

RESTRICTED STOCK UNITS AND PERFORMANCE UNITS

The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Fair value of RSUs vested	$	4,748	$	8,425	$	26,307	$	31,404
Fair value of earned PUs that vested	13,622		22,030		17,968		27,856

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 15

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

J. 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, facility upgrade and system integration costs (collectively, "Acquisition and Integration Costs"). Acquisition and Integration Costs do not include costs associated with the formation of joint ventures or costs associated with the acquisition of customer relationships. Total Acquisition and Integration Costs is $5,554 and $38,093 for the three and nine months ended September 30, 2022, respectively, and $1,138 and $3,415 for the three and nine months ended September 30, 2021, respectively.

K. (GAIN) LOSS ON DISPOSAL/WRITE-DOWN OF PROPERTY, PLANT AND EQUIPMENT, NET

(Gain) loss on disposal/write-down of property, plant and equipment, net for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021		2022(1)		2021(2)
(Gain) Loss on disposal/write-down of property, plant and equipment, net(3)	$	(14,170)	$	(935)	$	(66,124)	$	(134,321)

(1)    The gain for the nine months ended September 30, 2022 primarily consists of gains of approximately $66,000 associated with sale and sale-leaseback transactions, of which (i) 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 (ii) 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.

(2)    The gain for the nine months ended September 30, 2021 primarily consists of gains of approximately $127,400 associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021.

(3)    The gains recognized during both 2022 and 2021 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 detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Current Report.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 16

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

L. OTHER (INCOME) EXPENSE, NET

Other (income) expense, net for the three and nine months ended September 30, 2022 and 2021 consists of the following:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Foreign currency transaction (gains) losses, net(1)	$	(58,519)	$	(23,200)	$	(126,759)	$	(16,157)
Debt extinguishment expense	—		—		671		—
Other, net(2)(3)	5,649		4,699		87,902		(183,861)
Other (Income) Expense, Net	$	(52,870)	$	(18,501)	$	(38,186)	$	(200,018)

(1)We recognized net foreign currency transaction gains of $58,519 and $126,759 for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries.

(2)On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. 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. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35,800 associated with the Clutter Transaction (as defined in Note 4).

(3)Other, net for the nine months ended September 30, 2021 is primarily comprised of (a) a gain of approximately $180,600 associated with our IPM Divestment (as defined and discussed in Note 4 to Notes to Consolidated Financial Statements included in our Current Report) and (b) a gain of approximately $20,300 associated with the loss of control and related deconsolidation, as of May 18, 2021, of one of our wholly owned Netherlands subsidiaries, for which we had value-added tax liability exposure that was recorded in 2019.

M. INCOME TAXES

We provide for income taxes during interim periods based on our estimate of the effective tax rate for the year.

Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021(2)		2022(1)		2021(2)
Effective Tax Rate	11.0	%	29.1	%	10.7	%	28.1	%

(1)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9,900 as a result of the ITRenew Transaction.

(2)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021 reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 17

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

N. INCOME (LOSS) PER SHARE—BASIC AND DILUTED

The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767		428		1,952		2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)	$	192,164	$	67,683	$	434,544	$	388,571
Weighted-average shares—basic	290,937,000		289,762,000		290,673,000		289,255,000
Effect of dilutive potential stock options	1,133,952		869,600		1,126,280		522,642
Effect of dilutive potential RSUs and PUs	480,919		850,655		494,956		918,954
Weighted-average shares—diluted	292,551,871		291,482,255		292,294,236		290,696,596
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic	$	0.66	$	0.23	$	1.49	$	1.34
Diluted	$	0.66	$	0.23	$	1.49	$	1.34
Antidilutive stock options, RSUs and PUs, excluded from the calculation	220,421		351,673		403,362		1,813,880

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 18

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

3. ACQUISITIONS

ITRENEW ACQUISITION

On January 25, 2022, in order to expand our ALM operations, we acquired an approximately 80% interest in Intercept Parent, Inc. ("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 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 (the "Deferred Purchase Obligation"). The maximum amount of the Deferred Purchase Obligation would require achievement of the targeted performance metrics at approximately two times the level that is assumed in our fair value estimate of the Deferred Purchase Obligation of $275,100. From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. The Deferred Purchase Obligation is reflected as a long-term liability in our Condensed Consolidated Balance Sheet at September 30, 2022, and, accordingly, 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 will be included as a component of Other (income) expense, net in our Consolidated Statements of Operations until the Deferred Purchase Obligation is settled or paid. ITRenew is presented in Corporate and Other Business (as disclosed in Note 9) and primarily operates in the United States.

PRO FORMA FINANCIAL INFORMATION

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 September 30, 2022, we and ITRenew collectively incurred $59,370 of operating expenditures to complete the ITRenew Transaction (including advisory and professional fees required to complete the ITRenew Transaction). 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.

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Total Revenues	$	1,286,945	$	1,234,386	$	3,842,499	$	3,675,396
Income from Continuing Operations	$	192,931	$	70,491	$	436,627	$	341,096

In addition to our acquisition of ITRenew, we completed certain other acquisitions in 2021 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.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 19

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

3. ACQUISITIONS (CONTINUED)

OTHER 2022 ACQUISITIONS

In addition to the ITRenew Transaction, during the nine months ended September 30, 2022, in order to enhance our existing operations in Morocco and expand our fine arts operations in China - Hong Kong S.A.R. and North America, we completed the acquisitions of a records management company, a fine arts company and the assets of a second fine arts company, for a total purchase price of approximately $11,000, including deferred purchase obligation, purchase price holdbacks and other deferred payments of approximately $4,600.

PRELIMINARY PURCHASE PRICE ALLOCATION

A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2022 acquisitions through September 30, 2022 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30, 2022
Cash Paid (gross of cash acquired)(1)	$	756,003
Deferred Purchase Obligation, Purchase Price Holdbacks and Other(2)	279,734
Total Consideration	1,035,737
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash	31,571
Accounts Receivable, Prepaid Expenses and Other Assets	73,351
Property, Plant and Equipment	7,893
Customer and Supplier Relationship Intangible Assets(3)	491,422
Other Intangible Assets(3)	47,300
Operating Lease Right-of-Use Assets	32,680
Accounts Payable, Accrued Expenses and Other Liabilities	(60,683)
Operating Lease Liabilities	(32,680)
Deferred Income Taxes	(142,019)
Total Fair Value of Identifiable Net Assets Acquired	448,835
Goodwill Initially Recorded(4)	$	586,902

(1)Cash paid for acquisitions, net of cash acquired in our Condensed Consolidated Statement of Cash Flows includes contingent and other payments received of $219 for the nine months ended September 30, 2022 related to acquisitions made in the years prior to 2022.

(2)Deferred purchase obligation, purchase price holdbacks and other includes $275,100 related to the fair value estimate of the Deferred Purchase Obligation for the Remaining Interests and approximately $4,600 of deferred purchase obligation, purchase price holdbacks and other associated with our other business and asset acquisitions completed in 2022.

(3)The preliminary weighted average life of the intangible assets acquired in the ITRenew Transaction is approximately 11 years. Intangible assets are included as a component of Other assets, net in our Condensed Consolidated Balance Sheets.

(4)Goodwill is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of us and the acquired businesses.

The preliminary purchase price allocations that are not finalized as of September 30, 2022 relate to the final assessment of the fair values of intangible assets (primarily customer and supplier relationship intangible assets) and property, plant and equipment associated with the acquisitions we closed in 2022. Any adjustments to our estimates of purchase price allocation will be made in the periods in which the adjustments are determined, but no later than the one year measurement period, and the cumulative effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition dates. Adjustments recorded during the nine months ended September 30, 2022 were not material to our results from operations.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 20

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

4. INVESTMENTS

In February 2022, the joint venture formed by MakeSpace Labs, Inc. and us (the "MakeSpace JV") entered into an agreement with Clutter, Inc. ("Clutter") pursuant to which the equityholders of the MakeSpace JV contributed their ownership interests in the MakeSpace JV and Clutter’s shareholders contributed their ownership interests in Clutter to create a newly formed venture (the "Clutter JV"). In exchange for our 49.99% interest in the MakeSpace JV, we received an approximate 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 first quarter of 2022.

In April 2021, we closed on an agreement to form a joint venture (the "Web Werks JV") with the shareholders of Web Werks India Private Limited ("Web Werks"), a colocation data center provider in India. In connection with the formation of the Web Werks JV, we made an initial investment of approximately 3,750,000 Indian rupees (or approximately $50,100, based upon the exchange rate between the United States dollar and Indian rupee as of the closing date of the initial investment) in exchange for a noncontrolling interest in the form of convertible preference shares in the Web Werks JV (the "Initial Web Werks JV Investment"). Under the terms of the Web Werks JV shareholder agreement, we are required to make additional investments over a period ending May 2023 totaling approximately 7,500,000 Indian rupees. In August 2022, we made an additional investment of approximately 3,750,000 Indian rupees (or approximately $46,100, based on the exchange rate between the United States dollar and Indian rupee as of the date of the additional investment) in exchange for an additional interest in the form of convertible preference shares in the Web Werks JV (the "Second Web Werks JV Investment"). The shares we received from the Initial Web Werks JV Investment and the Second Web Werks JV Investment are convertible into a to-be-determined amount of equity shares determined by a valuation based on the earnings before interest, taxes, depreciation and amortization ("EBITDA") of the Web Werks JV for the trailing twelve months ending July 31, 2022. Subsequent to the Second Web Werks JV Investment, the shareholders of Web Werks retained control of the financial and operating decisions of the Web Werks JV through their control of Web Werks' board of directors. As we do not control the board of directors or the key management decisions of the Web Werks JV, we account for our interest in the Web Werks JV as an equity method investment.

The following joint ventures are accounted for as equity method investments and are presented as a component of Other within Other assets, net in our Condensed Consolidated Balance Sheets. The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022				DECEMBER 31, 2021
	CARRYING VALUE		EQUITY INTEREST		CARRYING VALUE		EQUITY INTEREST
Web Werks JV	$	97,877	55.40	%	$	51,140	38.50	%
Joint venture with AGC Equity Partners (the "Frankfurt JV")	27,004		20.00	%	26,167		20.00	%
MakeSpace JV	—		—	%	30,154		49.99	%
Clutter JV	57,113		26.73	%	—		—	%

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 21

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

5. 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

In March 2018, we entered into interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. These swap agreements expired in March 2022. In July 2019, we entered into forward-starting interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. As of September 30, 2022, we had $350,000 in notional value outstanding on the interest rate swap agreements, which expire in March 2024 ("March 2024 Interest Rate Swap Agreements"). Under the interest rate swap agreements, we receive variable rate interest payments associated with the notional amount of each interest rate swap, based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements.

We have designated these interest rate swap agreements as cash flow hedges. Unrealized gains are recognized as assets, while unrealized losses are recognized as liabilities.

CROSS-CURRENCY SWAP AGREEMENTS DESIGNATED AS A HEDGE OF NET INVESTMENT

In August 2019, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $110,000 at an interest rate of 6.0% for approximately 99,055 Euros at a weighted average interest rate of approximately 3.65%. These cross-currency swap agreements expire in August 2023 ("August 2023 Cross-Currency Swap Agreements").

In September 2020, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for 300,000 Euros at a weighted average interest rate of approximately 3.4%. These cross-currency swap agreements were set to expire in February 2026. In May 2022, these cross-currency swaps were amended ("February 2026 Cross-Currency Swap Agreements"). Under the terms of the February 2026 Cross-Currency Swap Agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for approximately 340,500 Euros at a weighted average interest rate of approximately 1.2%. These February 2026 Cross-Currency Swap Agreements are set to expire in February 2026.

We have designated these cross-currency swap agreements as a hedge of net investment against certain of our Euro denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap agreements are marked to market at 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.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 22

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

5. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (CONTINUED)

Assets (liabilities) recognized in our Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021, by derivative instrument, are as follows:

DERIVATIVE INSTRUMENTS(1)	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Cash Flow Hedges(2)
March 2024 Interest Rate Swap Agreements	$	12,879	$	(7,680)
Net Investment Hedges(3)
August 2023 Cross-Currency Swap Agreements	12,938		(664)
February 2026 Cross-Currency Swap Agreements	60,070		11,021

(1)Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net in our Condensed Consolidated Balance Sheets 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 Condensed Consolidated Balance Sheets. As of September 30, 2022, $12,938 is included within Prepaid expenses and other and $72,949 is included within Other assets. As of December 31, 2021, $11,021 is included within Other assets, $2,082 is included within Accrued expense and other current liabilities and $6,262 is included within Other long-term liabilities.

(2)As of September 30, 2022, cumulative net gains of $12,879 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements.

(3)As of September 30, 2022, cumulative net gains of $73,008 are recorded within Accumulated other comprehensive items, net associated with these cross-currency swap agreements.

Unrealized gains (losses) recognized during the three and nine months ended September 30, 2022 and 2021, by derivative instrument, are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DERIVATIVE INSTRUMENTS(1)	2022		2021		2022		2021
Cash Flow Hedges
March 2024 Interest Rate Swap Agreements	$	5,157	$	1,950	$	20,559	$	7,946
Net Investment Hedges
August 2023 Cross-Currency Swap Agreements	6,771		2,655		13,602		5,933
February 2026 Cross-Currency Swap Agreements	20,305		10,060		49,049		21,626

(1)These amounts are recognized as unrealized gains (losses), a component of Accumulated other comprehensive items, net.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 23

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

6. DEBT

Long-term debt is as follows:

	SEPTEMBER 30, 2022								DECEMBER 31, 2021
	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	$	890,000	$	(7,899)	$	882,101	$	890,000	$	—	$	(5,174)	$	(5,174)	$	—
Term Loan A	243,750		—		243,750		243,750		203,125		—		203,125		203,125
Term Loan B	667,766		(4,059)		663,707		668,500		672,847		(4,995)		667,852		675,500
Australian Dollar Term Loan	193,140		(464)		192,676		193,140		223,182		(656)		222,526		223,530
UK Bilateral Revolving Credit Facility	155,887		(175)		155,712		155,887		189,168		(709)		188,459		189,168
37/8% GBP Senior Notes due 2025 (the "GBP Notes")	445,392		(2,593)		442,799		392,373		540,481		(3,912)		536,569		542,508
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")(1)	1,000,000		(7,110)		992,890		892,500		1,000,000		(8,176)		991,824		1,030,000
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")(1)	825,000		(6,495)		818,505		719,813		825,000		(7,380)		817,620		862,125
5% Senior Notes due 2028 (the "5% Notes due 2028")(1)	500,000		(4,220)		495,780		428,750		500,000		(4,763)		495,237		513,750
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")(1)	1,000,000		(10,126)		989,874		815,000		1,000,000		(11,211)		988,789		1,022,500
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")(1)	1,300,000		(11,783)		1,288,217		1,072,500		1,300,000		(12,911)		1,287,089		1,355,250
41/2% Senior Notes due 2031 (the "41/2% Notes")(1)	1,100,000		(10,471)		1,089,529		847,000		1,100,000		(11,404)		1,088,596		1,094,500
5% Senior Notes due 2032 (the "5% Notes due 2032")	750,000		(12,827)		737,173		579,375		750,000		(13,782)		736,218		767,813
55/8% Senior Notes due 2032 (the "55/8% Notes")(1)	600,000		(5,711)		594,289		477,000		600,000		(6,147)		593,853		637,500
Real Estate Mortgages, Financing Lease Liabilities and Other	407,646		(643)		407,003		407,646		460,648		(840)		459,808		460,648
Accounts Receivable Securitization Program	316,700		(584)		316,116		316,700		—		(450)		(450)		—
Total Long-term Debt	10,395,281		(85,160)		10,310,121				9,364,451		(92,510)		9,271,941
Less Current Portion	(81,275)		—		(81,275)				(310,084)		656		(309,428)
Long-term Debt, Net of Current Portion	$	10,314,006	$	(85,160)	$	10,228,846			$	9,054,367	$	(91,854)	$	8,962,513

(1) Collectively, the "Parent Notes".

See Note 7 to Notes to Consolidated Financial Statements included in our Current Report for additional information regarding our long-term debt, including the direct obligors of each of our debt instruments as well as information regarding the fair value of our debt instruments (including the levels of the fair value hierarchy used to determine the fair value of our debt instruments). The levels of the fair value hierarchy used to determine the fair value of our debt as of September 30, 2022 are consistent with the levels of the fair value hierarchy used to determine the fair value of our debt as of December 31, 2021 (which are disclosed in our Current Report).

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 24

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

6. DEBT (CONTINUED)

CREDIT AGREEMENT

Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the "Revolving Credit Facility"), a term loan A (the "Term Loan A") and a term loan B (the "Term Loan B"). On March 18, 2022, we entered into an amendment to the Credit Agreement, which included the following changes:

(i) extended the maturity date of the Revolving Credit Facility and Term Loan A from June 3, 2023 to March 18, 2027;

(ii) refinanced and increased the borrowing capacity that IMI and certain of its United States and foreign subsidiaries are able to borrow under the Revolving Credit Facility from $1,750,000 to $2,250,000;

(iii) refinanced the existing Term Loan A with a new $250,000 Term Loan A; and

(iv) increased the net total lease adjusted leverage ratio maximum allowable from 6.5x to 7.0x and removed the net secured lease adjusted leverage ratio requirement.

On March 18, 2022, we borrowed the full amount of the Term Loan A. As of September 30, 2022, we had $890,000, $243,750 and $668,500 of outstanding borrowings under the Revolving Credit Facility, Term Loan A and Term Loan B, respectively. In addition, we also had various outstanding letters of credit totaling $3,779. The remaining amount available for borrowing under the Revolving Credit Facility as of September 30, 2022 was $1,356,221 (which represents the maximum availability as of such date). 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, subject to a cap contained therein.

REVOLVING CREDIT FACILITY $2,250,000	TERM LOAN A $250,000	TERM LOAN B $700,000
Outstanding borrowings $890,000	Aggregate outstanding principal amount $243,750	Aggregate outstanding principal amount $668,500
4.7% Interest rate	4.9% Interest rate	4.2% Interest rate
As of September 30, 2022	As of September 30, 2022	As of September 30, 2022

AUSTRALIAN DOLLAR TERM LOAN

Iron Mountain Australia Group Pty, Ltd. ("IM Australia"), a wholly owned subsidiary of IMI, has an AUD term loan with an original principal balance of 350,000 Australian dollars ("AUD Term Loan"). On March 18, 2022, IM Australia amended its AUD Term Loan to (i) extend the maturity date from September 22, 2022 to September 30, 2026 and (ii) decrease the interest rate from BBSY (an Australian benchmark variable interest rate) plus 3.875% to BBSY plus 3.625%. All other terms of the AUD Term Loan remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

OUTSTANDING BORROWINGS AU$302,041 INTEREST RATE 6.7% As of September 30, 2022

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 25

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

6. DEBT (CONTINUED)

UK BILATERAL REVOLVING CREDIT FACILITY

MAXIMUM AMOUNT £140,000 OPTIONAL ADDITIONAL COMMITMENTS £125,000 INTEREST RATE 4.2% As of September 30, 2022

Iron Mountain (UK) PLC and Iron Mountain (UK) Data Centre Limited (collectively, the "UK Borrowers") have a British pounds sterling Revolving Credit Facility (the "UK Bilateral Revolving Credit Facility") with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Revolving Credit Facility is 140,000 British pounds sterling, which was fully drawn as of September 30, 2022. 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. On September 22, 2022, the UK Borrowers exercised their option to extend the maturity date from September 24, 2023 to September 24, 2024. All other material terms of the UK Bilateral Revolving Credit Facility remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM On June 29, 2022, we amended the Accounts Receivable Securitization Program to (i) increase the maximum borrowing capacity from $300,000 to $325,000, with an option to increase the borrowing capacity to $400,000, (ii) change the interest rate under Accounts Receivable Securitization Program from LIBOR plus 1.0% to SOFR plus 0.95%, with a credit spread adjustment of 0.10% and (iii) extend the maturity date from July 1, 2023 to July 1, 2025, at which point all obligations become due. All other material terms of the Accounts Receivable Securitization Program remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report. MAXIMUM AMOUNT $325,000
OUTSTANDING BORROWING $316,700
INTEREST RATE 4.1% As of September 30, 2022

CASH POOLING

During the third quarter of 2022, we entered into two new cash pooling arrangements with JP Morgan Chase Bank, N.A. ("JPM"), one of which we utilize to manage global liquidity requirements for our QRSs in the Europe, Middle East, and Africa regions (the "JPM QRS EMEA Cash Pool") and the other for our TRSs in the Europe, Middle East, and Africa regions (the "JPM TRS EMEA Cash Pool"). We continue to utilize our two other cash pooling arrangements with JPM, one of which we utilize to manage global liquidity requirements for our QRSs in the Asia Pacific region (the "JPM QRS APAC Cash Pool") and the other for our TRSs in the Asia Pacific region (the "JPM TRS APAC Cash Pool").

Additionally, we utilize two separate cash pooling arrangements with Bank Mendes Gans ("BMG"), one of which we utilize to manage global liquidity requirements for our QRSs (the "BMG QRS Cash Pool") and the other for our TRSs (the "BMG TRS Cash Pool").

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 26

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

6. DEBT (CONTINUED)

The approximate amount of the net cash position for our cash pools and the approximate amount of the gross position and outstanding debit balances for each of these pools as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION		GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION
BMG QRS Cash Pool	$	590,127	$	(588,633)	$	1,494	$	552,900	$	(552,100)	$	800
BMG TRS Cash Pool	539,557		(538,498)		1,059		606,000		(603,900)		2,100
JPM QRS APAC Cash Pool	23,561		(23,394)		167		9,400		(9,200)		200
JPM TRS APAC Cash Pool	22,272		(21,899)		373		12,000		(9,900)		2,100
JPM QRS EMEA Cash Pool	6,030		(5,718)		312		—		—		—
JPM TRS EMEA Cash Pool	2,104		(2,044)		60		—		—		—

The net cash position balances as of September 30, 2022 and December 31, 2021 are reflected as cash and cash equivalents in our Condensed Consolidated Balance Sheets.

LETTERS OF CREDIT

As of September 30, 2022, we had outstanding letters of credit totaling $37,221, of which $3,779 reduce our borrowing capacity under the Revolving Credit Facility (as described above). The letters of credit expire at various dates between October 2022 and January 2033.

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 fixed charge coverage ratio and a net total lease adjusted leverage 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 earnings before interest, taxes, depreciation and amortization and rent expense ("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 for purposes of those calculations 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 September 30, 2022 and December 31, 2021. Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 27

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

7. COMMITMENTS AND CONTINGENCIES

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. While the outcome of such 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 $24,000 over the next several years, of which certain amounts would be covered by insurance or indemnity arrangement.

8. STOCKHOLDERS' EQUITY MATTERS

In fiscal year 2021 and the nine months ended September 30, 2022, our board of directors declared the following dividends:

DECLARATION DATE	DIVIDEND PER SHARE		RECORD DATE	TOTAL AMOUNT		PAYMENT DATE
February 24, 2021	$	0.6185	March 15, 2021	$	178,569	April 6, 2021
May 6, 2021	0.6185		June 15, 2021	179,026		July 6, 2021
August 5, 2021	0.6185		September 15, 2021	179,080		October 6, 2021
November 4, 2021	0.6185		December 15, 2021	179,132		January 6, 2022
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

On November 3, 2022, we declared a dividend to our stockholders of record as of December 15, 2022 of $0.6185 per share, payable on January 5, 2023.

9. SEGMENT INFORMATION

As discussed in Note 11 to Notes to Consolidated Financial Statements included in our Current Report, in the second quarter of 2022, we reassessed the composition of our reportable segments and note that (i) our Entertainment Services offerings are now managed as part of our Global Records and Information Management ("Global RIM") Business segment; (ii) certain commercial costs that were previously managed as part of Corporate and Other Business are now managed as part of our Global RIM Business segment; and (iii) our ALM services, which includes our legacy secure IT disposition business and our business acquired from ITRenew, are now managed as a separate operating segment that is included in Corporate and Other Business. Previously reported segment information has been restated to conform to the current presentation.

Our reportable segments as of December 31, 2021 are described in Note 11 to Notes to Consolidated Financial Statements included in our Current Report and are as follows:

•Global RIM Business

•Global Data Center Business

•Corporate and Other Business

The operations associated with acquisitions completed during the first nine months of 2022 have been incorporated into our existing reportable segments.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 28

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

9. SEGMENT INFORMATION (CONTINUED)

An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Total Revenues	$	1,091,102	$	997,843	$	3,210,469	$	2,971,085
Adjusted EBITDA	483,862		435,904		1,402,025		1,263,277
Global Data Center Business
Total Revenues	$	100,309	$	88,587	$	297,384	$	236,672
Adjusted EBITDA	42,660		35,097		126,944		98,961
Corporate and Other Business
Total Revenues	$	95,534	$	43,718	$	316,672	$	124,187
Adjusted EBITDA	(57,088)		(53,232)		(173,835)		(158,273)
Total Consolidated
Total Revenues	$	1,286,945	$	1,130,148	$	3,824,525	$	3,331,944
Adjusted EBITDA	469,434		417,769		1,355,134		1,203,965

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 29

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

9. SEGMENT INFORMATION (CONTINUED)

Adjusted EBITDA for each segment is defined 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 •Restructuring charges •(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	•Other (income) expense, net •Stock-based compensation expense

Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocating resources to, our operating segments.

A reconciliation of Net Income (Loss) to Adjusted EBITDA on a consolidated basis for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Add/(Deduct):
Interest expense, net	121,767		103,809		351,266		313,451
Provision (benefit) for income taxes	23,934		28,017		52,097		153,073
Depreciation and amortization	175,077		174,818		536,946		507,145
Acquisition and Integration Costs	5,554		1,138		38,093		3,415
Restructuring charges	3,382		50,432		3,382		129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)		(935)		(66,124)		(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)		(21,517)		(48,814)		(209,001)
Stock-based compensation expense	14,326		12,644		45,923		45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859		1,252		5,869		3,340
Adjusted EBITDA	$	469,434	$	417,769	$	1,355,134	$	1,203,965

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 30

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

9. SEGMENT INFORMATION (CONTINUED)

Information as to our revenues by product and service lines by segment for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Records Management(1)	$	829,357	$	767,059	$	2,450,903	$	2,285,000
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)	134,519		100,105		374,290		286,665
Data Center(1)	—		—		—		—
Global Data Center Business
Records Management(1)	$	—	$	—	$	—	$	—
Data Management(1)	—		—		—		—
Information Destruction(1)	—		—		—		—
Data Center(1)	100,309		88,587		297,384		236,672
Corporate and Other Business
Records Management(1)	$	35,787	$	30,453	$	103,826	$	91,850
Data Management(1)	—		—		—		—
Information Destruction(1)(3)	59,747		13,265		212,846		32,337
Data Center(1)	—		—		—		—
Total Consolidated
Records Management(1)	$	865,144	$	797,512	$	2,554,729	$	2,376,850
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)(3)	194,266		113,370		587,136		319,002
Data Center(1)	100,309		88,587		297,384		236,672

(1)Each of these offerings has a component of revenue that is storage rental related and a component that is service revenue, except for information destruction, which does not have a storage rental component.

(2)Includes secure shredding services.

(3)Includes product revenue from ITRenew.

10. RELATED PARTIES

In October 2020, in connection with the formation of the Frankfurt JV, we entered into agreements whereby we will 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"). Revenues and expenses associated with the Frankfurt JV Agreements are presented as a component of our Global Data Center Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $700 and $13,500, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $1,200 and $3,100, respectively, associated with the Frankfurt JV Agreements.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 31

Part I. Financial Information

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(In thousands, except share and per share data) (Unaudited)

10. RELATED PARTIES (CONTINUED)

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"). Revenues and expenses associated with the MakeSpace Agreement and Clutter Agreement are presented as a component of our Global RIM Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $6,900 and $21,300, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $9,300 and $24,900, respectively, associated with the MakeSpace Agreement and Clutter Agreement.

11. RESTRUCTURING CHARGES

PROJECT MATTERHORN

In September 2022, we announced a global program designed to accelerate the growth of our business (“Project Matterhorn”). Project Matterhorn investments will focus on transforming our operating model to a global operating model. This program is designed to allow us to shift from a product-based to a solution-based sales approach to better serve our customers’ needs and establish a global operating model that is designed to allow us to optimize our shared services and best practices. We expect to incur approximately $150,000 in costs annually related to Project Matterhorn from 2023 through 2025. Total costs related to Project Matterhorn for the three and nine months ended September 30, 2022 were not material.

PROJECT SUMMIT

In October 2019, we announced our global program designed to better position us for future growth and achievement of our strategic objectives ("Project Summit") which we completed as of December 31, 2021.

The implementation of Project Summit resulted in total operating expenditures of approximately $450,000 that primarily consisted of: (1) employee severance costs; (2) internal costs associated with the development and implementation of Project Summit initiatives; (3) professional fees, primarily related to third party consultants who assisted with the design and execution of various initiatives as well as project management activities and (4) system implementation and data conversion costs. As Project Summit was completed as of December 31, 2021, there were no restructuring charges for the three and nine months ended September 30, 2022. Total restructuring charges for the three and nine months ended September 30, 2021 was $50,432 and $129,686, respectively, and consisted of (i) employee severance costs of $6,797 and $14,526, respectively, and (ii) professional fees and other costs of $43,635 and $115,160, respectively.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 32

Part I. Financial Information

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations for the three and nine months ended September 30, 2022 should be read in conjunction with our Condensed Consolidated Financial Statements and Notes thereto for the three and nine months ended September 30, 2022, included herein, and our Consolidated Financial Statements and Notes thereto for the year ended December 31, 2021, included in Exhibit 99.1 of our Current Report on Form 8-K filed with the United States Securities and Exchange Commission ("SEC") on August 4, 2022 (our "Current Report").

FORWARD-LOOKING STATEMENTS

We have made statements in this Quarterly 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), incorporate alternative technologies into our offerings, achieve satisfactory returns on new product offerings, continue our revenue management, expand internationally and manage our international 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;

•the impact of our distribution requirements on our ability to execute our business plan;

•the severity and duration of the COVID-19 pandemic and its effects on the global economy, including its effects on us, the markets we serve and our customers and the third parties with whom we do business within those markets;

•our ability to fund capital expenditures;

•our ability to remain qualified for taxation as a real estate investment trust for United States federal income tax purposes ("REIT");

•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;

•changes in the political and economic environments in the countries in which our international subsidiaries operate and changes in the global political climate, particularly as we consolidate operations and move records and data across borders;

•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;

•failures to implement and manage new IT systems;

•unexpected events, including those resulting from climate change or geopolitical events, could disrupt our operations and adversely affect our reputation and results of operations;

•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 our Annual Report on Form 10-K filed with the SEC on February 24, 2022.

Except as required by law, we undertake no obligation to update any forward-looking statements appearing in this report.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 33

Part I. Financial Information

OVERVIEW

The following discussions set forth, for the periods indicated, management's discussion and analysis of financial condition and results of operations. Significant trends and changes are discussed for the three and nine months ended September 30, 2022 within each section. Trends and changes that are consistent for both the three and nine month periods are not repeated and are discussed on a year to date basis only.

PROJECT MATTERHORN

In September 2022, we announced a global program designed to accelerate the growth of our business (“Project Matterhorn”). Project Matterhorn investments will focus on transforming our operating model to a global operating model. This program is designed to allow us to shift from a product-based to a solution-based sales approach to better serve our customers’ needs and establish a global operating model that is designed to allow us to optimize our shared services and best practices. We expect to incur approximately $150.0 million in costs annually related to Project Matterhorn from 2023 through 2025. Total costs related to Project Matterhorn for the three and nine months ended September 30, 2022 were not material.

PROJECT SUMMIT

In October 2019, we announced our global program designed to better position us for future growth and achievement of our strategic objectives ("Project Summit") which we completed as of December 31, 2021. Project Summit has improved annual Adjusted EBITDA (as defined below) by approximately $375.0 million exiting 2021, of which approximately $160.0 million and $165.0 million were realized in 2021 and 2020, respectively, with the remainder realized during 2022.

ACQUISITION OF ITRENEW

On January 25, 2022, in order to expand our asset lifecycle management ("ALM") operations, we acquired an approximately 80% interest in Intercept Parent, Inc. ("ITRenew"). From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. ITRenew is presented in Corporate and Other Business and primarily operates in the United States. See Acquisitions within the Liquidity and Capital Resources section below for additional information.

DIVESTMENTS AND DECONSOLIDATIONS

IPM DIVESTMENT

On June 7, 2021, we sold our Intellectual Property Management ("IPM") business, also known as our technology escrow services business, which we predominantly operated in the United States, for total gross consideration of approximately $215.4 million (the "IPM Divestment"). We have concluded that the IPM Divestment does not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as our decision to divest this business does not represent a strategic shift that will have a major effect on our operations and financial results. Accordingly, the revenues and expenses associated with this business are presented as a component of Operating income (loss) in our Condensed Consolidated Statements of Operations through the date of divestment and the cash flows associated with this business is presented as a component of cash flows from operations in our Condensed Consolidated Statements of Cash Flows through the date of divestment. Our IPM business represented approximately $14.2 million of total revenues and approximately $6.8 million of total net income from January 1, 2021 through the date of divestment on June 7, 2021.

DECONSOLIDATIONS

On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. We recognized a loss of approximately $105.8 million 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. Accordingly, the revenues and expenses associated with these businesses are presented as a component of Operating income (loss) in our Condensed Consolidated Statements of Operations through the date of deconsolidation and the cash flows associated with these businesses are presented as a component of Cash flows from operations in our Condensed Consolidated Statements of Cash Flows through the date of the deconsolidation. These businesses represented approximately $44.9 million of total revenues and $7.2 million of total net income for the year ended December 31, 2021.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 34

Part I. Financial Information

GENERAL

RESULTS OF OPERATIONS - KEY TRENDS

•We have experienced steady volume in our Global RIM Business segment, with organic storage rental revenue growth driven primarily by revenue management. We expect organic storage rental revenue growth to benefit from revenue management and volume to be relatively stable in the near term.

•Our organic service revenue growth is primarily due to increases in our service activity. We expect organic service revenue growth for the remainder of 2022 and into 2023 to benefit from our new and existing digital offerings, as well as our traditional services.

•We expect continued total revenue and Adjusted EBITDA growth in 2022 and into 2023 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.

•We expect the impact of a stronger US dollar to create headwinds on reported total revenue and Adjusted EBITDA growth against prior periods through the remainder of 2022 and into 2023.

Cost of sales (excluding depreciation and amortization) and Selling, general and administrative expenses for the nine months ended September 30, 2022 consists of the following:

COST OF SALES	SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

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 charges •(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	•Other (income) expense, net •Stock-based compensation expense

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.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 35

Part I. Financial Information

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 (as determined in accordance with GAAP).

RECONCILIATION OF NET INCOME (LOSS) TO ADJUSTED EBITDA (IN THOUSANDS):

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Add/(Deduct):
Interest expense, net	121,767		103,809		351,266		313,451
Provision (benefit) for income taxes	23,934		28,017		52,097		153,073
Depreciation and amortization	175,077		174,818		536,946		507,145
Acquisition and Integration Costs(1)	5,554		1,138		38,093		3,415
Restructuring charges(2)	3,382		50,432		3,382		129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)		(935)		(66,124)		(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)		(21,517)		(48,814)		(209,001)
Stock-based compensation expense	14,326		12,644		45,923		45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859		1,252		5,869		3,340
Adjusted EBITDA	$	469,434	$	417,769	$	1,355,134	$	1,203,965

(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, facility upgrade and system integration costs (collectively, "Acquisition and Integration Costs"). Acquisition and Integration Costs do not include costs associated with the formation of joint ventures or costs associated with the acquisition of customer relationships.

(2) Represent operating expenses associated with the implementation of (1) Project Matterhorn for the three and nine months ended September 30, 2022 and (2) Project Summit that primarily consisted of: (i) employee severance costs; (ii) internal costs associated with the development and implementation of Project Summit initiatives; (iii) professional fees, primarily related to third party consultants who assisted with the design and execution of various initiatives as well as project management activities and (iv) system implementation and data conversion costs for the three and nine months ended September 30, 2021.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 36

Part I. Financial Information

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 charges •Amortization related to the write-off of certain customer relationship intangible assets •(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	•Other (income) expense, net •Stock-based compensation expense •Tax impact of reconciling items and discrete tax items

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:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Reported EPS—Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated	$	0.66	$	0.23	$	1.49	$	1.34
Add/(Deduct):
Acquisition and Integration Costs	0.02		—		0.13		0.01
Restructuring charges	0.01		0.17		0.01		0.45
Amortization related to the write-off of certain customer relationship intangible assets	—		—		0.02		—
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(0.05)		(0.01)		(0.22)		(0.46)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(0.19)		(0.07)		(0.17)		(0.72)
Stock-based compensation expense	0.05		0.04		0.16		0.16
Tax impact of reconciling items and discrete tax items(1)	(0.01)		0.02		(0.09)		0.31
Net Income (Loss) Attributable to Noncontrolling Interests	—		—		0.01		0.01
Adjusted EPS—Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated(2)	$	0.48	$	0.40	$	1.34	$	1.09

(1)The difference between our effective tax rates and our structural tax rate (or adjusted effective tax rates) for the three and nine months ended September 30, 2022 and 2021 is 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 both the three and nine months ended September 30, 2022 and 2021 was 16.5%. The Tax impact of reconciling items and discrete tax items is calculated using the current quarter's estimate of the annual structural tax rate for the full year. This may result in the current period adjustment plus prior period reported quarterly adjustments not summing to the full year adjustment.

(2)Columns may not foot due to rounding.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 37

Part I. Financial Information

FFO (NAREIT) AND FFO (NORMALIZED)

Funds from operations ("FFO") is defined by the National Association of Real Estate Investment Trusts ("Nareit") 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 and adjusting for our share of reconciling items from our unconsolidated joint ventures from FFO ("FFO (Nareit)"). 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).

Although Nareit has published a definition of FFO, 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 charges •Loss (gain) on disposal/write-down of property, plant and equipment, net (excluding real estate) •Other (income) expense, net	•Stock-based compensation expense •Real estate financing lease depreciation •Tax impact of reconciling items and discrete tax items

RECONCILIATION OF NET INCOME (LOSS) TO FFO (NAREIT) AND FFO (NORMALIZED) (IN THOUSANDS):

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Add/(Deduct):
Real estate depreciation	74,652		79,463		228,993		230,294
(Gain) loss on sale of real estate, net of tax	(15,666)		748		(64,430)		(106,033)
Data center lease-based intangible assets amortization	3,687		10,458		11,850		31,423
FFO (Nareit)	255,604		158,780		612,909		546,948
Add/(Deduct):
Acquisition and Integration Costs	5,554		1,138		38,093		3,415
Restructuring charges	3,382		50,432		3,382		129,686
Loss (gain) on disposal/write-down of property, plant and equipment, net (excluding real estate)	2,616		(1,668)		(573)		(2,890)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures(1)	(56,226)		(21,517)		(48,814)		(209,001)
Stock-based compensation expense	14,326		12,644		45,923		45,913
Real estate financing lease depreciation	3,020		3,740		10,227		10,791
Tax impact of reconciling items and discrete tax items(2)	(5,184)		5,304		(26,090)		65,120
Our share of FFO (Normalized) reconciling items from our unconsolidated joint ventures	223		(17)		577		(30)
FFO (Normalized)	$	223,315	$	208,836	$	635,634	$	589,952

(1)Includes foreign currency transaction (gains) losses, net and other, net. See Note 2.l. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information regarding the components of Other (income) expense, net.

(2)Represents the tax impact of (i) the reconciling items above, which impact our reported net income (loss) before provision (benefit) for income taxes and (ii) other discrete tax items. Discrete tax items resulted in a (benefit) provision for income taxes of $(1.2) million and $(11.4) million for the three and nine months ended September 30, 2022, respectively, and $5.0 million and $19.4 million for the three and nine months ended September 30, 2021, respectively.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 38

Part I. Financial Information

CRITICAL ACCOUNTING ESTIMATES

Our discussion and analysis of our financial condition and results of operations are based upon our Condensed 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. Our critical accounting estimates include the following, which are listed in no particular order:

•Revenue Recognition

•Accounting for Acquisitions

•Impairment of Tangible and Intangible Assets

•Income Taxes

Further detail regarding our critical accounting estimates can be found in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Current Report, and the Consolidated Financial Statements and the Notes included therein. We have determined that no material changes concerning our critical accounting estimates have occurred since December 31, 2021. See Note 2.k. to Notes to Consolidated Financial Statements included in our Current Report for information regarding the reassessment of the composition of our reporting units as a result of the realignment of our global managerial structure during the second quarter of 2022.

RESULTS OF OPERATIONS

COMPARISON OF THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2022 TO THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2021 (IN THOUSANDS):

	THREE MONTHS ENDED SEPTEMBER 30,						DOLLAR CHANGE		PERCENTAGE CHANGE
	2022			2021
Revenues	$	1,286,945		$	1,130,148		$	156,797	13.9	%
Operating Expenses	1,001,183			948,712			52,471		5.5	%
Operating Income	285,762			181,436			104,326		57.5	%
Other Expenses, Net	92,831			113,325			(20,494)		(18.1)	%
Net Income (Loss)	192,931			68,111			124,820		183.3	%
Net Income (Loss) Attributable to Noncontrolling Interests	767			428			339		79.2	%
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	192,164		$	67,683		$	124,481	183.9	%
Adjusted EBITDA(1)	$	469,434		$	417,769		$	51,665	12.4	%
Adjusted EBITDA Margin(1)	36.5		%	37.0		%

	NINE MONTHS ENDED SEPTEMBER 30,						DOLLAR CHANGE		PERCENTAGE CHANGE
	2022			2021
Revenues	$	3,824,525		$	3,331,944		$	492,581	14.8	%
Operating Expenses	3,022,852			2,674,174			348,678		13.0	%
Operating Income	801,673			657,770			143,903		21.9	%
Other Expenses, Net	365,177			266,506			98,671		37.0	%
Net Income (Loss)	436,496			391,264			45,232		11.6	%
Net Income (Loss) Attributable to Noncontrolling Interests	1,952			2,693			(741)		(27.5)	%
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	434,544		$	388,571		$	45,973	11.8	%
Adjusted EBITDA(1)	$	1,355,134		$	1,203,965		$	151,169	12.6	%
Adjusted EBITDA Margin(1)	35.4		%	36.1		%

(1)See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly 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.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 39

Part I. Financial Information

REVENUES

Total revenues consist of the following (in thousands):

	THREE MONTHS ENDED SEPTEMBER 30,						PERCENTAGE CHANGE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY(1)		ORGANIC GROWTH(2)		IMPACT OF ACQUISITIONS
Storage Rental	$	760,370	$	718,614	$	41,756	5.8	%	9.8	%	9.7	%	0.1	%
Service	526,575		411,534		115,041		28.0	%	32.8	%	21.8	%	11.0	%
Total Revenues	$	1,286,945	$	1,130,148	$	156,797	13.9	%	18.2	%	14.1	%	4.1	%

	NINE MONTHS ENDED SEPTEMBER 30,						PERCENTAGE CHANGE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY(1)		ORGANIC GROWTH(2)		IMPACT OF ACQUISITIONS
Storage Rental	$	2,264,566	$	2,144,942	$	119,624	5.6	%	8.5	%	8.2	%	0.3	%
Service	1,559,959		1,187,002		372,957		31.4	%	35.3	%	19.7	%	15.6	%
Total Revenues	$	3,824,525	$	3,331,944	$	492,581	14.8	%	18.0	%	12.4	%	5.6	%

(1)Constant currency growth rates, which are a non-GAAP measure, are calculated by translating the 2021 results at the 2022 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 nine months ended September 30, 2022, the increase in reported revenue was primarily driven by organic storage rental revenue growth and organic service revenue growth and the impact of acquisitions, primarily ITRenew. Foreign currency exchange rate fluctuations decreased our reported revenue growth rate for the nine months ended September 30, 2022 by 3.2% compared to the prior year period.

STORAGE RENTAL REVENUE AND SERVICE REVENUE

Primary factors influencing the change in reported storage rental revenue and reported service revenue for the nine months ended September 30, 2022 compared to the nine months ended September 30, 2021 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; •a 0.7% increase in total global volume excluding deconsolidations (also excluding acquisitions, total global volume increased 0.7%); and •a decrease of $57.5 million due to foreign currency exchange rate fluctuations.
SERVICE REVENUE	•organic service revenue growth reflecting increased service activity levels; •an increase of $167.9 million due to our recent acquisition of ITRenew; and •a decrease of $33.7 million due to foreign currency exchange rate fluctuations.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 40

Part I. Financial Information

OPERATING EXPENSES

COST OF SALES

Cost of sales (excluding depreciation and amortization) consists of the following expenses (in thousands):

	THREE MONTHS ENDED SEPTEMBER 30,						PERCENTAGE CHANGE				% OF TOTAL REVENUES				PERCENTAGE CHANGE (FAVORABLE)/ UNFAVORABLE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		2022		2021
Labor	$	199,738	$	190,285	$	9,453	5.0	%	9.1	%	15.5	%	16.8	%	(1.3)	%
Facilities	225,233		202,426		22,807		11.3	%	15.8	%	17.5	%	17.9	%	(0.4)	%
Transportation	40,835		33,314		7,521		22.6	%	27.0	%	3.2	%	2.9	%	0.3	%
Product Cost of Sales and Others	80,235		55,638		24,597		44.2	%	51.1	%	6.2	%	4.9	%	1.3	%
Total Cost of sales	$	546,041	$	481,663	$	64,378	13.4	%	18.0	%	42.4	%	42.6	%	(0.2)	%

	NINE MONTHS ENDED  SEPTEMBER 30,						PERCENTAGE CHANGE				% OF TOTAL REVENUES				PERCENTAGE CHANGE (FAVORABLE)/ UNFAVORABLE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		2022		2021
Labor	$	604,698	$	578,765	$	25,933	4.5	%	7.6	%	15.8	%	17.4	%	(1.6)	%
Facilities	657,347		593,487		63,860		10.8	%	14.0	%	17.2	%	17.8	%	(0.6)	%
Transportation	118,494		101,241		17,253		17.0	%	20.3	%	3.1	%	3.0	%	0.1	%
Product Cost of Sales and Other	268,600		134,658		133,942		99.5	%	106.5	%	7.0	%	4.0	%	3.0	%
Total Cost of sales	$	1,649,139	$	1,408,151	$	240,988	17.1	%	20.6	%	43.1	%	42.3	%	0.8	%

Primary factors influencing the change in reported Cost of sales for the nine months ended September 30, 2022 compared to the nine months ended September 30, 2021 include the following:

•an increase in labor costs driven by an increase in service activity and the impact of recent acquisitions, partially offset by benefits from Project Summit;

•an increase in facilities expenses driven by increases in rent expense, reflecting the impact from our sale-leaseback activity during 2021 and the first nine months of 2022 (which we expect to continue for the remainder of 2022 as we continue to look for future opportunities to monetize a small portion of our owned industrial real estate assets as part of our ongoing capital recycling program), as well as increases in utilities and building maintenance costs;

•an increase in product cost of sales and other driven by the acquisition of ITRenew; and

•a decrease of $40.9 million due to foreign currency exchange rate fluctuations.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 41

Part I. Financial Information

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

Selling, general and administrative expenses consists of the following expenses (in thousands):

	THREE MONTHS ENDED  SEPTEMBER 30,						PERCENTAGE CHANGE				% OF TOTAL REVENUES				PERCENTAGE CHANGE (FAVORABLE)/ UNFAVORABLE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		2022		2021
General, Administrative and Other	$	208,620	$	183,476	$	25,144	13.7	%	17.1	%	16.2	%	16.2	%	—	%
Sales, Marketing and Account Management	76,679		58,120		18,559		31.9	%	37.7	%	6.0	%	5.1	%	0.9	%
Total Selling, general and administrative expenses	$	285,299	$	241,596	$	43,703	18.1	%	22.0	%	22.2	%	21.4	%	0.8	%

	NINE MONTHS ENDED  SEPTEMBER 30,						PERCENTAGE CHANGE				% OF TOTAL REVENUES				PERCENTAGE CHANGE (FAVORABLE)/ UNFAVORABLE
	2022		2021		DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		2022		2021
General, Administrative and Other	$	635,827	$	561,686	$	74,141	13.2	%	15.6	%	16.6	%	16.9	%	(0.3)	%
Sales, Marketing and Account Management	225,589		198,412		27,177		13.7	%	16.8	%	5.9	%	6.0	%	(0.1)	%
Total Selling, general and administrative expenses	$	861,416	$	760,098	$	101,318	13.3	%	15.9	%	22.5	%	22.8	%	(0.3)	%

Primary factors influencing the change in reported Selling, general and administrative expenses for the nine months ended September 30, 2022 compared to the nine months ended September 30, 2021 include the following:

•an increase in general, administrative and other expenses, driven by recent acquisitions, higher wages and benefits, employee related costs, information technology costs and professional fees, partially offset by benefits from Project Summit;

•an increase in sales, marketing and account management expenses, driven by recent acquisitions and higher compensation expense, primarily reflecting increased wages and benefits; and

•a decrease of $16.9 million due to foreign currency exchange rate fluctuations.

DEPRECIATION AND AMORTIZATION

Depreciation expense increased by $3.4 million, or 1.0%, for the nine months ended September 30, 2022 compared to the prior year period. See Note 2.h. to Notes to Consolidated Financial Statements included in our Current Report for additional information regarding the useful lives over which our property, plant and equipment is depreciated.

Amortization expense increased by $26.4 million, or 16.5%, for the nine months ended September 30, 2022 compared to the prior year period primarily driven by the amortization of the intangible assets acquired in the ITRenew Transaction.

ACQUISITION AND INTEGRATION COSTS

Acquisition and Integration Costs for the nine months ended September 30, 2022 were approximately $38.1 million and primarily consist of legal and professional fees.

(GAIN) LOSS ON DISPOSAL/WRITE-DOWN OF PROPERTY, PLANT AND EQUIPMENT, NET

Gain on disposal/write-down of property, plant and equipment, net for the nine months ended September 30, 2022 was approximately $66.1 million. The gain primarily consists of gains of approximately $66.0 million associated with sale and sale-leaseback transactions, of which (i) approximately $17.0 million relates to sale-leaseback transactions of two facilities in the United States and one in Canada during the third quarter of 2022 and (ii) approximately $49.0 million relates to sale and sale-leaseback transactions of 11 facilities and parcels of land in the United States during the second quarter of 2022.

Gain on disposal/write-down of property, plant and equipment, net for the nine months ended September 30, 2021 was approximately $134.3 million, which primarily consists of gains of approximately $127.4 million associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 42

Part I. Financial Information

OTHER EXPENSES, NET

INTEREST EXPENSE, NET

Interest expense, net increased by $37.8 million to $351.3 million in the nine months ended September 30, 2022 from $313.5 million in the prior year period, primarily driven by increases in average debt balances and the weighted average interest rate on our outstanding debt at September 30, 2022. See Note 6 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information regarding our indebtedness.

OTHER (INCOME) EXPENSE, NET

Other (income) expense, net consists of the following (in thousands):

	THREE MONTHS ENDED SEPTEMBER 30,				DOLLAR CHANGE		NINE MONTHS ENDED SEPTEMBER 30,				DOLLAR CHANGE
DESCRIPTION	2022		2021				2022		2021
Foreign currency transaction (gains) losses, net(1)	$	(58,519)	$	(23,200)	$	(35,319)	$	(126,759)	$	(16,157)	$	(110,602)
Debt extinguishment expense	—		—		—		671		—		671
Other, net(2)	5,649		4,699		950		87,902		(183,861)		271,763
Other (Income) Expense, Net	$	(52,870)	$	(18,501)	$	(34,369)	$	(38,186)	$	(200,018)	$	161,832

(1)We recognized net foreign currency transaction gains of $58.5 million and $126.8 million for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries.

(2)On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. We recognized a loss of approximately $105.8 million 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. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35.8 million associated with the Clutter Transaction (as defined below).

PROVISION FOR INCOME TAXES

We provide for income taxes during interim periods based on our estimate of the effective tax rate for the year. Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021		2022(1)		2021
Effective Tax Rate	11.0	%	29.1	%	10.7	%	28.1	%

(1)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9.9 million as a result of the ITRenew Transaction (as defined below).

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 43

Part I. Financial Information

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):

	THREE MONTHS ENDED SEPTEMBER 30,						DOLLAR CHANGE		PERCENTAGE CHANGE
	2022			2021
Net Income (Loss)	$	192,931		$	68,111		$	124,820	183.3	%
Net Income (Loss) as a percentage of Revenue	15.0		%	6.0		%
Adjusted EBITDA	$	469,434		$	417,769		$	51,665	12.4	%
Adjusted EBITDA Margin	36.5		%	37.0		%

	NINE MONTHS ENDED SEPTEMBER 30,						DOLLAR CHANGE		PERCENTAGE CHANGE
	2022			2021
Net Income (Loss)	$	436,496		$	391,264		$	45,232	11.6	%
Net Income (Loss) as a percentage of Revenue	11.4		%	11.7		%
Adjusted EBITDA	$	1,355,134		$	1,203,965		$	151,169	12.6	%
Adjusted EBITDA Margin	35.4		%	36.1		%

Adjusted EBITDA Margin for the nine months ended September 30, 2022 decreased by 70 basis points compared to the same prior year period, primarily reflecting a 150 basis point decrease from the acquisition of ITRenew, partially offset by improved service revenue trends, benefits from Project Summit, revenue management and ongoing cost containment measures. ↑ INCREASED BY $151.2 MILLION OR 12.6% Adjusted EBITDA

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 44

Part I. Financial Information

SEGMENT ANALYSIS

See Note 9 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report, for a description of our reportable segments. Previously reported segment information has been restated to conform to the current presentation.

GLOBAL RIM BUSINESS (IN THOUSANDS)

	THREE MONTHS ENDED  SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	650,141		$	633,403		$	16,738	2.6	%	6.6	%	7.1	%	(0.5)	%
Service	440,961			364,440			76,521		21.0	%	25.3	%	25.6	%	(0.3)	%
Segment Revenue	$	1,091,102		$	997,843		$	93,259	9.3	%	13.4	%	13.9	%	(0.5)	%
Segment Adjusted EBITDA	$	483,862		$	435,904		$	47,958
Segment Adjusted EBITDA Margin	44.3		%	43.7		%

	NINE MONTHS ENDED  SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	1,949,999		$	1,883,967		$	66,032	3.5	%	6.5	%	6.0	%	0.5	%
Service	1,260,470			1,087,118			173,352		15.9	%	19.2	%	18.7	%	0.5	%
Segment Revenue	$	3,210,469		$	2,971,085		$	239,384	8.1	%	11.1	%	10.7	%	0.4	%
Segment Adjusted EBITDA	$	1,402,025		$	1,263,277		$	138,748
Segment Adjusted EBITDA Margin	43.7		%	42.5		%

NINE MONTHS ENDED YEAR OVER YEAR SEGMENT ANALYSIS: GLOBAL RIM BUSINESS (IN MILLIONS)

Storage Rental
Revenue Service
Revenue Segment
Revenue Segment Adjusted
EBITDA

Primary factors influencing the change in revenue and Adjusted EBITDA Margin in our Global RIM Business segment for the nine months ended September 30, 2022 compared to the prior year period include the following:

•organic storage rental revenue growth driven by revenue management and volume;

•a 0.7% increase in Global RIM volume excluding deconsolidations (also excluding acquisitions, Global RIM volume increased 0.7%);

•organic service revenue growth mainly driven by increases in our traditional service activity levels and growth in our Global Digital Solutions business;

•a decrease in revenue of $81.8 million due to foreign currency exchange rate fluctuations; and

•a 120 basis point increase in Adjusted EBITDA Margin primarily driven by revenue management, benefits from Project Summit and ongoing cost containment measures.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 45

Part I. Financial Information

GLOBAL DATA CENTER BUSINESS (IN THOUSANDS)

	THREE MONTHS ENDED SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	96,328		$	72,411		$	23,917	33.0	%	37.3	%	32.6	%	4.7	%
Service	3,981			16,176			(12,195)		(75.4)	%	(73.4)	%	(74.3)	%	0.9	%
Segment Revenue	$	100,309		$	88,587		$	11,722	13.2	%	17.9	%	13.3	%	4.6	%
Segment Adjusted EBITDA	$	42,660		$	35,097		$	7,563
Segment Adjusted EBITDA Margin	42.5		%	39.6		%

	NINE MONTHS ENDED SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	273,547		$	210,805		$	62,742	29.8	%	32.7	%	27.7	%	5.0	%
Service	23,837			25,867			(2,030)		(7.8)	%	(1.5)	%	(3.5)	%	2.0	%
Segment Revenue	$	297,384		$	236,672		$	60,712	25.7	%	29.1	%	24.3	%	4.8	%
Segment Adjusted EBITDA	$	126,944		$	98,961		$	27,983
Segment Adjusted EBITDA Margin	42.7		%	41.8		%

NINE MONTHS ENDED YEAR OVER YEAR SEGMENT ANALYSIS: GLOBAL DATA CENTER BUSINESS (IN MILLIONS)

Storage Rental
Revenue Service
Revenue Segment
Revenue Segment Adjusted
EBITDA

Primary factors influencing the change in revenue, Adjusted EBITDA and Adjusted EBITDA Margin in our Global Data Center Business segment for the nine months ended September 30, 2022 compared to the prior year period include the following:

•organic storage rental revenue growth from leases that commenced during the first nine months of 2022 and in prior periods and higher pass-through power costs, partially offset by churn of 320 basis points;

•an increase in Adjusted EBITDA primarily driven by organic storage rental revenue growth; and

•a 90 basis point increase in Adjusted EBITDA Margin reflecting ongoing cost management and a decline in lower margin project revenue, partially offset by higher pass-through power costs.

The organic service revenue decline for the three months ended September 30, 2022 compared to the prior year period is the result of the completion of special project work during the second quarter of 2022.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 46

Part I. Financial Information

CORPORATE AND OTHER BUSINESS (IN THOUSANDS)

	THREE MONTHS ENDED SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	13,900		$	12,800		$	1,100	8.6	%	11.1	%	8.7	%	2.4	%
Service	81,634			30,918			50,716		164.0	%	175.5	%	26.9	%	148.6	%
Revenue	$	95,534		$	43,718		$	51,816	118.5	%	126.7	%	21.5	%	105.2	%
Adjusted EBITDA	$	(57,088)		$	(53,232)		$	(3,856)
Adjusted EBITDA as a percentage of Consolidated Revenue	(4.4)		%	(4.7)		%

	NINE MONTHS ENDED SEPTEMBER 30,								PERCENTAGE CHANGE
							DOLLAR CHANGE		ACTUAL		CONSTANT CURRENCY		ORGANIC GROWTH		IMPACT OF ACQUISITIONS
	2022			2021
Storage Rental	$	41,019		$	50,170		$	(9,151)	(18.2)	%	(17.4)	%	8.5	%	(25.9)	%
Service	275,653			74,017			201,636		272.4	%	285.4	%	42.4	%	243.0	%
Revenue	$	316,672		$	124,187		$	192,485	155.0	%	161.3	%	31.1	%	130.2	%
Adjusted EBITDA	$	(173,835)		$	(158,273)		$	(15,562)
Adjusted EBITDA as a percentage of Consolidated Revenue	(4.5)		%	(4.8)		%

Primary factors influencing the change in revenue and Adjusted EBITDA in Corporate and Other Business for the nine months ended September 30, 2022 compared to the prior year period include the following:

•a decrease in reported storage revenue reflecting the IPM Divestment in the second quarter of 2021;

•reported service revenue for the nine months ended September 30, 2022 includes $167.9 million from the acquisition of ITRenew;

•organic service revenue growth mainly driven by increased service activity levels in our Fine Arts and ALM businesses; and

•a decrease in Adjusted EBITDA driven by higher compensation expense and employee related costs, professional fees and the impact of the IPM Divestment in the second quarter of 2021, partially offset by benefits from Project Summit, improved service revenue trends and the impact of the acquisition of ITRenew.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 47

Part I. Financial Information

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) and proceeds from monetizing a small portion of our total industrial real estate assets in the future, as well as other potential financings (such as the issuance of debt or equity). 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 and pending business acquisitions and investments and normal business operation needs.

CASH FLOWS

The following is a summary of our cash balances and cash flows (in thousands) as of and for the nine months ended September 30,

	2022		2021
Cash Flows from Operating Activities	$	560,355	$	463,337
Cash Flows from Investing Activities	(1,303,760)		(319,785)
Cash Flows from Financing Activities	658,447		(177,587)
Cash and Cash Equivalents, End of Period	155,223		161,439

A. CASH FLOWS FROM OPERATING ACTIVITIES

For the nine months ended September 30, 2022, net cash flows provided by operating activities increased by $97.0 million compared to the prior year period, primarily due to an increase in net income (excluding non-cash charges) of $246.1 million, partially offset by a decrease in cash from working capital of $149.1 million, primarily related to the timing of accounts payable and accrued expenses and collections of accounts receivable.

B. CASH FLOWS FROM INVESTING ACTIVITIES

Our significant investing activity during the nine months ended September 30, 2022 included:

•We paid cash for capital expenditures of $596.8 million. Additional details of our capital spending are included in the "Capital Expenditures" section below.

•We paid cash for acquisitions (net of cash acquired) of $724.2 million, primarily funded by cash on hand and borrowings under our Revolving Credit Facility (as defined in Note 6 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report).

•We received $119.4 million in net proceeds from sales of property, plant and equipment, primarily related to proceeds from sale and sale-leaseback transactions of 14 facilities and parcels of land in the United States and Canada during the second and third quarters of 2022.

C. CASH FLOWS FROM FINANCING ACTIVITIES

Our significant financing activities during the nine months ended September 30, 2022 included:

•Net proceeds of $1,201.5 million primarily associated with borrowings under the Revolving Credit Facility, Term Loan A and the Accounts Receivable Securitization Program.

•Payment of dividends in the amount of $544.1 million on our common stock.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 48

Part I. Financial Information

CAPITAL EXPENDITURES

The following table presents our capital spend for the nine months ended September 30, 2022 and 2021, organized by the type of the spending as described in our Current Report (in thousands):

	NINE MONTHS ENDED SEPTEMBER 30,
NATURE OF CAPITAL SPEND	2022		2021
Growth Investment Capital Expenditures:
Data Center	$	396,015	$	209,097
Real Estate	114,374		60,558
Innovation and Other	30,808		15,445
Total Growth Investment Capital Expenditures	541,197		285,100
Recurring Capital Expenditures:
Real Estate	$	44,294	$	43,398
Non-Real Estate	52,442		52,153
Data Center	9,420		6,936
Total Recurring Capital Expenditures	106,156		102,487
Total Capital Spend (on accrual basis)	$	647,353	$	387,587
Net increase (decrease) in prepaid capital expenditures	(960)		279
Net decrease (increase) in accrued capital expenditures	(49,592)		31,110
Total Capital Spend (on cash basis)	$	596,801	$	418,976

Excluding capital expenditures associated with potential future acquisitions, we expect total capital expenditures of approximately $950.0 million for the year ending December 31, 2022. Of this, we expect our capital expenditures for growth investment to be approximately $800.0 million, and our recurring capital expenditures to approach $155.0 million.

DIVIDENDS

See Note 8 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for a listing of dividends that we declared during the first nine months of 2022 and fiscal year 2021.

On November 3, 2022, we declared a dividend to our stockholders of record as of December 15, 2022 of $0.6185 per share, payable on January 5, 2023.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 49

Part I. Financial Information

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. The only significant concentration of liquid investments as of September 30, 2022 is related to cash and cash equivalents. See Note 2.f. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for information on our money market funds and time deposits.

Long-term debt as of September 30, 2022 is as follows (in thousands):

	SEPTEMBER 30, 2022
	DEBT (INCLUSIVE OF DISCOUNT)		UNAMORTIZED DEFERRED FINANCING COSTS		CARRYING AMOUNT
Revolving Credit Facility	$	890,000	$	(7,899)	$	882,101
Term Loan A	243,750		—		243,750
Term Loan B	667,766		(4,059)		663,707
Australian Dollar Term Loan	193,140		(464)		192,676
UK Bilateral Revolving Credit Facility	155,887		(175)		155,712
37/8% GBP Senior Notes due 2025 (the "GBP Notes")	445,392		(2,593)		442,799
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")(1)	1,000,000		(7,110)		992,890
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")(1)	825,000		(6,495)		818,505
5% Senior Notes due 2028 (the "5% Notes due 2028")(1)	500,000		(4,220)		495,780
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")(1)	1,000,000		(10,126)		989,874
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")(1)	1,300,000		(11,783)		1,288,217
41/2% Senior Notes due 2031 (the "41/2% Notes")(1)	1,100,000		(10,471)		1,089,529
5% Senior Notes due 2032 (the "5% Notes due 2032")	750,000		(12,827)		737,173
55/8% Senior Notes due 2032 (the "55/8% Notes")(1)	600,000		(5,711)		594,289
Real Estate Mortgages, Financing Lease Liabilities and Other	407,646		(643)		407,003
Accounts Receivable Securitization Program	316,700		(584)		316,116
Total Long-term Debt	10,395,281		(85,160)		10,310,121
Less Current Portion	(81,275)		—		(81,275)
Long-term Debt, Net of Current Portion	$	10,314,006	$	(85,160)	$	10,228,846

(1)Collectively, the "Parent Notes".

See Note 7 to Notes to Consolidated Financial Statements included in our Current Report and Note 6 to Notes to Condensed Consolidated Financial Statements included in this Quarterly 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 (the "Term Loan A") and a term loan B (the "Term Loan B"). On March 18, 2022, we entered into an amendment to the Credit Agreement which included the following changes:

(i) extended the maturity date of the Revolving Credit Facility and Term Loan A from June 3, 2023 to March 18, 2027;

(ii) refinanced and increased the borrowing capacity that IMI and certain of its United States and foreign subsidiaries are able to borrow under the Revolving Credit Facility from $1,750.0 million to $2,250.0 million;

(iii) refinanced the existing Term Loan A with a new $250.0 million Term Loan A; and

(iv) increased the net total lease adjusted leverage ratio maximum allowable from 6.5x to 7.0x and removed the net secured lease adjusted leverage ratio requirement.

On March 18, 2022, we borrowed the full amount of the Term Loan A. As of September 30, 2022, we had $890.0 million, $243.8 million and $668.5 million of outstanding borrowings under the Revolving Credit Facility, Term Loan A and Term Loan B, respectively. In addition, we also had various outstanding letters of credit totaling $3.8 million. The remaining amount available for borrowing under the Revolving Credit Facility as of September 30, 2022 was $1,356.2 million (which represents the maximum availability as of such date). 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, subject to a cap contained therein.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 50

Part I. Financial Information

AUSTRALIAN DOLLAR TERM LOAN

Iron Mountain Australia Group Pty, Ltd. ("IM Australia"), a wholly owned subsidiary of IMI, has an AUD term loan with an original principal balance of 350.0 million Australian dollars ("AUD Term Loan"). On March 18, 2022, IM Australia amended its AUD Term Loan to (i) extend the maturity date from September 22, 2022 to September 30, 2026 and (ii) decrease the interest rate from BBSY (an Australian benchmark variable interest rate) plus 3.875% to BBSY plus 3.625%. All other terms of the AUD Term Loan remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

UK BILATERAL REVOLVING CREDIT FACILITY

Iron Mountain (UK) PLC and Iron Mountain (UK) Data Centre Limited (collectively, the "UK Borrowers") have a British pounds sterling Revolving Credit Facility (the "UK Bilateral Revolving Credit Facility") with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Revolving Credit Facility is 140.0 million British pounds sterling, which was fully drawn as of September 30, 2022. We have the option to request additional commitments of up to 125.0 million British pounds sterling, subject to conditions specified in the UK Bilateral Revolving Credit Facility. On September 22, 2022, the UK Borrowers exercised their option to extend the maturity date from September 24, 2023 to September 24, 2024. All other material terms of the UK Bilateral Revolving Credit Facility remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM

On June 29, 2022, we amended the Accounts Receivable Securitization Program to (i) increase the maximum borrowing capacity from $300.0 million to $325.0 million, with an option to increase the borrowing capacity to $400.0 million, (ii) change the interest rate under Accounts Receivable Securitization Program from LIBOR plus 1.0% to SOFR plus 0.95%, with a credit spread adjustment of 0.10% and (iii) extend the maturity date from July 1, 2023 to July 1, 2025, at which point all obligations become due. All other material terms of the Accounts Receivable Securitization Program remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

CASH POOLING

During the third quarter of 2022, we entered into two new cash pooling arrangements with JP Morgan Chase Bank, N.A. ("JPM"), one of which we utilize to manage global liquidity requirements for our qualified REIT subsidiaries ("QRSs") in the Europe, Middle East, and Africa regions (the "JPM QRS EMEA Cash Pool") and the other for our TRSs in the Europe, Middle East, and Africa regions (the "JPM TRS EMEA Cash Pool"). We continue to utilize our two other cash pooling arrangements with JPM, one of which we utilize to manage global liquidity requirements for our QRSs in the Asia Pacific region (the "JPM QRS APAC Cash Pool") and the other for our TRSs in the Asia Pacific region (the "JPM TRS APAC Cash Pool").

Additionally, we utilize two separate cash pooling arrangements with Bank Mendes Gans ("BMG"), one of which we utilize to manage global liquidity requirements for our QRSs (the "BMG QRS Cash Pool") and the other for our TRSs (the "BMG TRS Cash Pool").

LETTERS OF CREDIT

As of September 30, 2022, we had outstanding letters of credit totaling $37.2 million of which $3.8 million reduce our borrowing capacity under the Revolving Credit Facility. The letters of credit expire at various dates between October 2022 and January 2033.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 51

Part I. Financial Information

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 fixed charge coverage ratio and a net total lease adjusted leverage 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 earnings before interest, taxes, depreciation and amortization and rent expense ("EBITDAR") based calculations and the bond indentures use earnings before interest, 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 for purposes of those calculations 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, such as Project Summit and Project Matterhorn. 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 September 30, 2022 are as follows:

	SEPTEMBER 30, 2022	MAXIMUM/MINIMUM ALLOWABLE
Net total lease adjusted leverage ratio	5.2	Maximum allowable of 7.0
Fixed charge coverage ratio	2.5	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 September 30, 2022. 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

In March 2018, we entered into interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. These swap agreements expired in March 2022. In July 2019, we entered into forward-starting interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. As of September 30, 2022, we had $350.0 million in notional value outstanding on the interest rate swap agreements, which expire in March 2024. Under the interest rate swap agreements, we receive variable rate interest payments associated with the notional amount of each interest rate swap, based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements.

We have designated these interest rate swap agreements as cash flow hedges.

CROSS-CURRENCY SWAP AGREEMENTS

We enter into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. The cross-currency swap agreements are designated as a hedge of net investment against certain of our Euro denominated subsidiaries and require an exchange of the notional amounts at maturity.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 52

Part I. Financial Information

In August 2019, we entered into cross-currency swap agreements whereby we notionally exchanged approximately $110.0 million at an interest rate of 6.0% for approximately 99.1 million Euros at a weighted average interest rate of approximately 3.65%. These cross-currency swap agreements expire in August 2023.

In September 2020, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $359.2 million at an interest rate of 4.5% for 300.0 million Euros at a weighted average interest rate of approximately 3.4%. These cross-currency swap agreements were set to expire in February 2026. In May 2022, these cross-currency swaps were amended ("February 2026 Cross-Currency Swap Agreements"). Under the terms of the February 2026 Cross-Currency Swap Agreements we notionally exchanged approximately $359.2 million at an interest rate of 4.5% for approximately 340.5 million Euros at a weighted average interest rate of approximately 1.2%. These February 2026 Cross-Currency Swap Agreements are set to expire in February 2026.

See Note 5 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information on our derivative instruments.

ACQUISITIONS

ITRENEW ACQUISITION

On January 25, 2022, we acquired an approximately 80% interest in ITRenew, at an agreed upon purchase price of $725.0 million, subject to certain working capital adjustments at, and subsequent to, the closing (the "ITRenew Transaction"). At closing, we paid approximately $748.8 million and acquired approximately $30.7 million of cash on hand, for a net purchase price of approximately $718.1 million for the ITRenew Transaction. The acquisition agreement 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 $200.0 million and no more than $531.0 million (the "Deferred Purchase Obligation"). The maximum amount of the Deferred Purchase Obligation would require achievement of the targeted performance metrics at approximately two times the level that is assumed in our fair value estimate of the Deferred Purchase Obligation of $275.1 million. From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. The Deferred Purchase Obligation is reflected as a long-term liability in our Condensed Consolidated Balance Sheet at September 30, 2022, and, accordingly, 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 will be included as a component of Other (income) expense, net in our Consolidated Statements of Operations until the Deferred Purchase Obligation is settled or paid.

OTHER 2022 ACQUISITIONS

In addition to the ITRenew Transaction, during the nine months ended September 30, 2022, in order to enhance our existing operations in Morocco and expand our fine arts operations in China - Hong Kong S.A.R. and North America, we completed the acquisition of a records management company, a fine arts company and the assets of a second fine arts company, for a total purchase price of approximately $11.0 million, including deferred purchase obligation, purchase price holdbacks and other deferred payments of approximately $4.6 million.

On October 5, 2022, in order to further expand our data center operations in Europe, we completed the acquisition of assets of XData Properties, a data center colocation space and solutions provider with a data center in Spain, for (i) cash consideration of 78.9 million Euros (or approximately $78.2 million, 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 10.0 million Euros (or approximately $9.9 million, 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.

INVESTMENTS

In February 2022, the joint venture formed by MakeSpace Labs, Inc. and us (the "MakeSpace JV") entered into an agreement with Clutter, Inc. ("Clutter") pursuant to which the equityholders of the MakeSpace JV contributed their ownership interests in the MakeSpace JV and Clutter’s shareholders contributed their ownership interests in Clutter to create a newly formed venture (the "Clutter JV"). In exchange for our 49.99% interest in the MakeSpace JV, we received an approximate 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 $35.8 million, which was recorded to Other, net, a component of Other expense (income), net during the first quarter of 2022.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 53

Part I. Financial Information

In April 2021, we closed on an agreement to form a joint venture (the "Web Werks JV") with the shareholders of Web Werks India Private Limited ("Web Werks"), a colocation data center provider in India. In connection with the formation of the Web Werks JV, we made an initial investment of approximately 3,750.0 million Indian rupees (or approximately $50.1 million, based upon the exchange rate between the United States dollar and Indian rupee as of the closing date of the initial investment) in exchange for a noncontrolling interest in the form of convertible preference shares in the Web Werks JV. Under the terms of the Web Werks JV shareholder agreement, we are required to make additional investments over a period ending May 2023 totaling approximately 7,500.0 million Indian rupees. In August 2022, we made an additional investment of approximately 3,750.0 million Indian rupees (or approximately $46.1 million, based on the exchange rate between the United States dollar and Indian rupee as of the date of the additional investment) in exchange for an additional interest in the form of convertible preference shares in the Web Werks JV.

JOINT VENTURE SUMMARY

The following joint ventures are accounted for as equity method investments and are presented as a component of Other within Other assets, net in our Condensed Consolidated Balance Sheets. The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows (in thousands):

	SEPTEMBER 30, 2022				DECEMBER 31, 2021
	CARRYING VALUE		EQUITY INTEREST		CARRYING VALUE		EQUITY INTEREST
Web Werks JV	$	97,877	55.40	%	$	51,140	38.50	%
Joint venture with AGC Equity Partners	27,004		20.00	%	26,167		20.00	%
MakeSpace JV	—		—	%	30,154		49.99	%
Clutter JV	57,113		26.73	%	—		—	%

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 54

Part I. Financial Information

ITEM 4. 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 Securities Exchange Act of 1934, as amended (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 September 30, 2022 (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.

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 that occurred during the quarter ended September 30, 2022, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 55

Part II. Other Information

PART II. OTHER INFORMATION

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

We did not sell any unregistered equity securities during the three months ended September 30, 2022, nor did we repurchase any shares of our common stock during the nine months ended September 30, 2022.

ITEM 6. EXHIBITS

(A) EXHIBITS

Certain exhibits indicated below are incorporated by reference to documents we have filed with the SEC.

EXHIBIT NO.	DESCRIPTION
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.)
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.

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 57

Part II. Other Information

SIGNATURES

Pursuant to the requirements 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

Dated: November 3, 2022

IRON MOUNTAIN SEPTEMBER 30, 2022 FORM 10-Q 58

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, William L. Meaney, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Iron Mountain Incorporated; 

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: 

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; 

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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; 

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.    The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: November 3, 2022

/s/ WILLIAM L. MEANEY

William L. Meaney

President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Barry A. Hytinen, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Iron Mountain Incorporated;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: 

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; 

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and 

5.    The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions): 

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: November 3, 2022

/s/ BARRY A. HYTINEN

Barry A. Hytinen

Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. Section 1350, as adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the filing of the quarterly report on Form 10-Q for the quarter ended September 30, 2022 (the "Report") by Iron Mountain Incorporated (the "Company"), the undersigned, as the President and Chief Executive Officer of the Company, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.    the Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

2.    the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2022

/s/ WILLIAM L. MEANEY

William L. Meaney

President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. Section 1350, as adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

    In connection with the filing of the quarterly report on Form 10-Q for the quarter ended September 30, 2022 (the "Report") by Iron Mountain Incorporated (the "Company"), the undersigned, as the Executive Vice President and Chief Financial Officer of the Company, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.    the Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

2.    the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2022

/s/ BARRY A. HYTINEN

Barry A. Hytinen

Executive Vice President and Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	1-13045
Entity Registrant Name	IRON MOUNTAIN INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2588479
Entity Address, Address Line One	One Federal Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02110
City Area Code	617
Local Phone Number	535-4766
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	IRM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Emerging Growth Company	false
Small Business Entity	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		290,714,037
Entity Central Index Key	0001020569
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 155,223	$ 255,828
Accounts receivable (less allowances of $52,695 and $62,009 as of September 30, 2022 and December 31, 2021, respectively)	1,133,596	961,419
Prepaid expenses and other	268,030	224,020
Total Current Assets	1,556,849	1,441,267
Property, Plant and Equipment:
Property, plant and equipment	8,794,078	8,647,303
Less—Accumulated depreciation	(4,063,636)	(3,979,159)
Property, Plant and Equipment, Net	4,730,442	4,668,144
Other Assets, Net:
Goodwill	4,831,306	4,463,531
Customer and supplier relationships and other intangible assets	1,444,924	1,181,043
Operating lease right-of-use assets	2,556,253	2,314,422
Other	574,942	381,624
Total Other Assets, Net	9,407,425	8,340,620
Total Assets	15,694,716	14,450,031
Current Liabilities:
Current portion of long-term debt	81,275	309,428
Accounts payable	432,384	369,145
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	929,566	1,032,537
Deferred revenue	282,687	307,470
Total Current Liabilities	1,725,912	2,018,580
Long-term Debt, net of current portion	10,228,846	8,962,513
Long-term Operating Lease Liabilities, net of current portion	2,405,751	2,171,472
Other Long-term Liabilities	398,830	144,053
Deferred Income Taxes	307,717	223,934
Commitments and Contingencies
Redeemable Noncontrolling Interests	93,821	72,411
Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)	0	0
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 290,687,942 and 289,757,061 shares as of September 30, 2022 and December 31, 2021, respectively)	2,907	2,898
Additional paid-in capital	4,445,988	4,412,553
(Distributions in excess of earnings) Earnings in excess of distributions	(3,330,213)	(3,221,152)
Accumulated other comprehensive items, net	(589,481)	(338,347)
Total Iron Mountain Incorporated Stockholders' Equity	529,201	855,952
Noncontrolling Interests	4,638	1,116
Total Equity	533,839	857,068
Total Liabilities and Equity	$ 15,694,716	$ 14,450,031

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 52,695	$ 62,009
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Preferred stock, outstanding shares (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	400,000,000	400,000,000
Common stock, issued shares (in shares)	290,687,942	289,757,061
Common stock, outstanding shares (in shares)	290,687,942	289,757,061

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Storage rental	$ 760,370	$ 718,614	$ 2,264,566	$ 2,144,942
Service	526,575	411,534	1,559,959	1,187,002
Total Revenues	1,286,945	1,130,148	3,824,525	3,331,944
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	546,041	481,663	1,649,139	1,408,151
Selling, general and administrative	285,299	241,596	861,416	760,098
Depreciation and amortization	175,077	174,818	536,946	507,145
Acquisition and Integration Costs	5,554	1,138	38,093	3,415
Restructuring charges	3,382	50,432	3,382	129,686
(Gain) Loss on disposal/write-down of property, plant and equipment, net	(14,170)	(935)	(66,124)	(134,321)
Total Operating Expenses	1,001,183	948,712	3,022,852	2,674,174
Operating Income (Loss)	285,762	181,436	801,673	657,770
Interest Expense, Net (includes Interest Income)	121,767	103,809	351,266	313,451
Other (Income) Expense, Net	(52,870)	(18,501)	(38,186)	(200,018)
Net Income (Loss) Before Provision (Benefit) for Income Taxes	216,865	96,128	488,593	544,337
Provision (Benefit) for Income Taxes	23,934	28,017	52,097	153,073
Net Income (Loss)	192,931	68,111	436,496	391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767	428	1,952	2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 192,164	$ 67,683	$ 434,544	$ 388,571
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Weighted average common shares outstanding-basic (in shares)	290,937,000	289,762,000	290,673,000	289,255,000
Weighted average common shares outstanding-diluted (in shares)	292,551,871	291,482,255	292,294,236	290,696,596

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Interest income	$ 2,176	$ 2,160	$ 5,995	$ 5,858

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(175,098)	(91,263)	(335,431)	(115,075)
Change in Fair Value of Derivative Instruments	32,233	14,665	83,210	35,505
Total Other Comprehensive (Loss) Income:	(142,865)	(76,598)	(252,221)	(79,570)
Comprehensive Income (Loss)	50,066	(8,487)	184,275	311,694
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	408	(370)	865	1,683
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 49,658	$ (8,117)	$ 183,410	$ 310,011

XML

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	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
Beginning of Period at Dec. 31, 2020	$ 1,136,729	$ 2,883	$ 4,340,078	$ (2,950,339)	$ (255,893)	$ 0
Balance (in shares) at Dec. 31, 2020		288,273,049
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	66,507	$ 12	66,495
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		1,273,097
Changes in equity related to noncontrolling interests	680		680				$ (512)
Parent cash dividends declared	(540,045)			(540,045)
Foreign currency translation adjustment	(114,112)				(114,065)	(47)
Change in fair value of derivative instruments	35,505				35,505
Net income (loss)	388,571			388,571
Purchase of noncontrolling interests	1,311					1,311
End of period at Sep. 30, 2021	975,146	$ 2,895	4,407,253	(3,101,813)	(334,453)	1,264
Balance (in shares) at Sep. 30, 2021		289,546,146
Beginning of redeemable noncontrolling interest at Dec. 31, 2020							59,805
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests	680		680				(512)
Foreign currency translation adjustment							(963)
Net income (loss)							2,693
Noncontrolling interests equity contributions							2,200
Noncontrolling interests dividends							(1,882)
Purchase of noncontrolling interests							2,567
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021							61,390
Beginning of Period at Jun. 30, 2021	1,147,742	$ 2,895	4,392,396	(2,988,896)	(258,653)	0
Balance (in shares) at Jun. 30, 2021		289,458,768
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	14,857	$ 0	14,857
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		87,378
Changes in equity related to noncontrolling interests							168
Parent cash dividends declared	(180,600)			(180,600)
Foreign currency translation adjustment	(90,512)				(90,465)	(47)
Change in fair value of derivative instruments	14,665				14,665
Net income (loss)	67,683			67,683
Purchase of noncontrolling interests	1,311					1,311
End of period at Sep. 30, 2021	975,146	$ 2,895	4,407,253	(3,101,813)	(334,453)	1,264
Balance (in shares) at Sep. 30, 2021		289,546,146
Beginning of redeemable noncontrolling interest at Jun. 30, 2021							64,660
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests							168
Foreign currency translation adjustment							(751)
Net income (loss)							428
Noncontrolling interests dividends							(597)
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021							61,390
Beginning of Period at Dec. 31, 2021	$ 857,068	$ 2,898	4,412,553	(3,221,152)	(338,347)	1,116
Balance (in shares) at Dec. 31, 2021	289,757,061	289,757,061
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	$ 36,939	$ 9	36,930
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		930,881
Changes in equity related to noncontrolling interests	2,626		(1,009)			3,635	1,009
Parent cash dividends declared	(543,605)			(543,605)
Foreign currency translation adjustment	(334,825)				(334,344)	(481)	(606)
Change in fair value of derivative instruments	83,210				83,210
Net income (loss)	434,912			434,544		368
Noncontrolling interests equity contributions and related costs	(2,486)		(2,486)
End of period at Sep. 30, 2022	$ 533,839	$ 2,907	4,445,988	(3,330,213)	(589,481)	4,638
Balance (in shares) at Sep. 30, 2022	290,687,942	290,687,942
Beginning of redeemable noncontrolling interest at Dec. 31, 2021	$ 72,411						72,411
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests	2,626		(1,009)			3,635	1,009
Net income (loss)							1,584
Noncontrolling interests equity contributions							21,547
Noncontrolling interests dividends							(2,124)
Ending of redeemable noncontrolling interest at Sep. 30, 2022	93,821						93,821
Beginning of Period at Jun. 30, 2022	651,775	$ 2,907	4,432,009	(3,340,992)	(446,975)	4,826
Balance (in shares) at Jun. 30, 2022		290,679,958
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	13,979		13,979
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		7,984
Parent cash dividends declared	(181,385)			(181,385)
Foreign currency translation adjustment	(175,061)				(174,739)	(322)	(37)
Change in fair value of derivative instruments	32,233				32,233
Net income (loss)	192,298			192,164		134
End of period at Sep. 30, 2022	$ 533,839	$ 2,907	$ 4,445,988	$ (3,330,213)	$ (589,481)	$ 4,638
Balance (in shares) at Sep. 30, 2022	290,687,942	290,687,942
Beginning of redeemable noncontrolling interest at Jun. 30, 2022							93,957
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss)							633
Noncontrolling interests dividends							(732)
Ending of redeemable noncontrolling interest at Sep. 30, 2022	$ 93,821						$ 93,821

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities:
Net income (loss)	$ 436,496	$ 391,264
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	350,626	347,269
Amortization (includes amortization of deferred financing costs and discounts of $13,536 and $12,470 for the nine months ended September 30, 2022 and 2021, respectively)	199,856	172,346
Revenue reduction associated with amortization of customer inducements and above- and below-market leases	5,532	6,578
Stock-based compensation expense	45,923	46,852
(Benefit) provision for deferred income taxes	(22,991)	36,333
Loss on early extinguishment of debt	671	0
Gain on IPM divestment	0	(180,569)
(Gain) loss on disposal/write-down of property, plant and equipment, net	(66,124)	(134,321)
Loss associated with OSG deconsolidation	105,825	0
Gain associated with Clutter Transaction	(35,821)	0
Foreign currency transactions and other, net	(101,329)	(13,239)
(Increase) decrease in assets	(219,173)	(112,753)
(Decrease) increase in liabilities	(139,136)	(96,423)
Cash Flows from Operating Activities	560,355	463,337
Cash Flows from Investing Activities:
Capital expenditures	(596,801)	(418,976)
Cash paid for acquisitions, net of cash acquired	(724,213)	(203,752)
Acquisition of customer relationships	(1,901)	(4,800)
Customer inducements	(4,288)	(5,148)
Contract fulfillment costs	(49,874)	(43,699)
Investments in joint ventures and other investments	(46,100)	(72,153)
Net proceeds from IPM Divestment	0	213,878
Proceeds from sales of property and equipment and other, net	119,417	214,865
Cash Flows from Investing Activities	(1,303,760)	(319,785)
Cash Flows from Financing Activities:
Repayment of revolving credit facility, term loan facilities and other debt	(8,038,964)	(2,622,555)
Proceeds from revolving credit facility, term loan facilities and other debt	9,240,478	3,037,476
Debt financing and equity contribution from noncontrolling interests	21,547	0
Debt repayment and equity distribution to noncontrolling interests	(2,124)	(1,882)
Repurchase of noncontrolling interest	0	(75,000)
Parent cash dividends	(544,069)	(538,902)
Net (payments) proceeds associated with employee stock-based awards	(8,984)	19,655
Other, net	(9,437)	3,621
Cash Flows from Financing Activities	658,447	(177,587)
Effect of Exchange Rates on Cash and Cash Equivalents	(15,647)	(9,589)
(Decrease) increase in Cash and Cash Equivalents	(100,605)	(43,624)
Cash and Cash Equivalents, Beginning of Period	255,828	205,063
Cash and Cash Equivalents, End of Period	155,223	161,439
Supplemental Information:
Cash Paid for Interest	410,851	395,355
Cash Paid for Income Taxes, Net	77,765	96,174
Non-Cash Investing and Financing Activities:
Financing Leases	18,774	40,590
Accrued Capital Expenditures	137,802	60,418
Deferred Purchase Obligation, Purchase Price Holdbacks and Other	279,734	0
Dividends Payable	$ 190,095	$ 189,010

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Statement of Cash Flows [Abstract]
Deferred financing costs and discount included in amortization	$ 13,536	$ 12,470

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General

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

GENERAL

The unaudited condensed consolidated financial statements of Iron Mountain Incorporated, a Delaware corporation ("IMI"), and its subsidiaries ("we" or "us"), have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (the "SEC"). Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to those rules and regulations, but we believe that the disclosures included herein are adequate to make the information presented not misleading. The interim condensed consolidated financial statements are presented herein and, in the opinion of management, reflect all adjustments of a normal recurring nature necessary for a fair presentation. Interim results are not necessarily indicative of results for a full year.

The Condensed Consolidated Financial Statements and Notes thereto, which are included herein, should be read in conjunction with the Consolidated Financial Statements and Notes thereto for the year ended December 31, 2021 included in Exhibit 99.1 of our Current Report on Form 8-K filed with the SEC on August 4, 2022 (our "Current Report").

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.

XML

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIESA. CASH AND CASH EQUIVALENTSCash 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

B. ACCOUNTS RECEIVABLE

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. The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2022 is as follows:

Balance as of December 31, 2021	$	62,009
Credit memos charged to revenue	41,722
Allowance for bad debts charged to expense	10,691
Deductions and other(1)	(61,727)
Balance as of September 30, 2022	$	52,695

(1)Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments.

C. INVENTORY

Inventories are stated at the lower of cost or net realizable value, based on a first-in, first-out methodology. Our inventory primarily consists of information technology-related assets including memory, central processing units, hard drives, adaptors and networking. All of our inventory is considered finished goods. Inventory is included as a component of Prepaid expenses and other in our Condensed Consolidated Balance Sheets. At September 30, 2022, we have inventory of approximately $14,565, net of related reserves for obsolete, excess and slow-moving inventory, related to our asset lifecycle management ("ALM") business. We had no inventory as of December 31, 2021.

D. LEASES

We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2022 and December 31, 2021 are as follows:

DESCRIPTION	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Assets:
Operating lease right-of-use assets	$	2,556,253	$	2,314,422
Financing lease right-of-use assets, net of accumulated depreciation(1)	250,627		298,049
Liabilities:
Current
Operating lease liabilities	$	270,311	$	259,597
Financing lease liabilities(1)	34,622		41,168
Long-term
Operating lease liabilities	$	2,405,751	$	2,171,472
Financing lease liabilities(1)	276,627		315,561

(1)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 Condensed Consolidated Balance Sheets.

The components of the lease expense for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Operating lease cost(1)	$	145,293	$	140,551	$	428,686	$	408,312
Financing lease cost:
Depreciation of financing lease right-of-use assets	$	10,186	$	14,006	$	32,218	$	39,062
Interest expense for financing lease liabilities	4,126		5,055		13,163		14,940

(1)Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $30,730 and $89,647 for the three and nine months ended September 30, 2022, respectively, and $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively.

Other information: Supplemental cash flow information relating to our leases for the nine months ended September 30, 2022 and 2021 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30,
CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES:	2022		2021
Operating cash flows used in operating leases	$	302,442	$	291,535
Operating cash flows used in financing leases (interest)	13,163		14,940
Financing cash flows used in financing leases	29,254		35,360
NON-CASH ITEMS:
Operating lease modifications and reassessments	$	145,133	$	103,158
New operating leases (including acquisitions and sale-leaseback transactions)	485,673		240,822

E. GOODWILL

Our reporting units as of December 31, 2021 are described in detail in Note 2.k. to Notes to Consolidated Financial Statements included in our Current Report.

The goodwill associated with acquisitions completed during the first nine months of 2022 (as described in Note 3) has been incorporated into our current reporting units.

The changes in the carrying value of goodwill attributable to each reportable segment for the nine months ended September 30, 2022 are as follows:

	GLOBAL RIM BUSINESS		GLOBAL DATA CENTER BUSINESS		CORPORATE AND OTHER BUSINESS		TOTAL CONSOLIDATED
Goodwill balance, net of accumulated amortization as of December 31, 2021(1)	$	3,972,852	$	426,074	$	64,605	$	4,463,531
Tax deductible goodwill acquired during the year	—		—		762		762
Non-tax deductible goodwill acquired during the period	696		—		585,444		586,140
Fair value and other adjustments(2)	(12,101)		—		384		(11,717)
Currency effects	(186,056)		(18,287)		(3,067)		(207,410)
Goodwill balance, net of accumulated amortization as of September 30, 2022	$	3,775,391	$	407,787	$	648,128	$	4,831,306
Accumulated goodwill impairment balance as of September 30, 2022	$	132,409	$	—	$	26,011	$	158,420

(1)The balances as of December 31, 2021 have been recast to reflect the segment changes described in our Current Report.

(2)This amount primarily represents an adjustment to goodwill as a result of the deconsolidation of certain businesses, as described in Note 2.l.

F. FAIR VALUE MEASUREMENTS

The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2022 and December 31, 2021 are as follows:

			FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2022 USING
DESCRIPTION	TOTAL CARRYING VALUE AT SEPTEMBER 30, 2022		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	18,861	$	—	$	18,861	$	—
Time Deposits	1,123		—		1,123		—
Trading Securities	9,085		9,049		36		—
Derivative Assets	85,887		—		85,887		—
Deferred Purchase Obligation (as defined in Note 3)	275,100		—		—		275,100

			FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2021 USING
DESCRIPTION	TOTAL CARRYING VALUE AT DECEMBER 31, 2021		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	101,022	$	—	$	101,022	$	—
Time Deposits	2,238		—		2,238		—
Trading Securities	11,147		11,062		85		—
Derivative Assets	11,021		—		11,021		—
Derivative Liabilities	8,344		—		8,344		—

There were no material items that are measured at fair value on a non-recurring basis at September 30, 2022 and December 31, 2021, other than (i) those disclosed in Note 2.o. to Notes to Consolidated Financial Statements included in our Current Report, (ii) assets acquired and liabilities assumed through our acquisitions that occurred during the nine months ended September 30, 2022, (iii) our initial investment in the Clutter JV and our additional investment in the Web Werks JV (each as defined in Note 4), and (iv) the fair value of our retained investment of our deconsolidated businesses (as described in Note 2.l.), all of which are based on Level 3 inputs. The fair value of the Deferred Purchase Obligation associated with the ITRenew Transaction (as defined in Note 3) was determined utilizing a Monte-Carlo model and takes into account our forecasted projections as it relates to the underlying performance of the business. There has been no material change in the fair value of the Deferred Purchase Obligation since our initial analysis.

G. ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET

The changes in Accumulated other comprehensive items, net for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30, 2022						THREE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(500,629)	$	53,654	$	(446,975)	$	(229,790)	$	(28,863)	$	(258,653)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)		—		(174,739)		(90,465)		—		(90,465)
Change in fair value of derivative instruments	—		32,233		32,233		—		14,665		14,665
Total other comprehensive (loss) income	(174,739)		32,233		(142,506)		(90,465)		14,665		(75,800)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

	NINE MONTHS ENDED SEPTEMBER 30, 2022						NINE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(341,024)	$	2,677	$	(338,347)	$	(206,190)	$	(49,703)	$	(255,893)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(334,344)		—		(334,344)		(114,065)		—		(114,065)
Change in fair value of derivative instruments	—		83,210		83,210		—		35,505		35,505
Total other comprehensive (loss) income	(334,344)		83,210		(251,134)		(114,065)		35,505		(78,560)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

H. REVENUES

The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, "Contract Fulfillment Costs"). Contract Fulfillment Costs as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT		GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT
Intake Costs asset	$	63,856	$	(40,045)	$	23,811	$	71,336	$	(42,678)	$	28,658
Commissions asset	124,081		(54,948)		69,133		114,791		(50,553)		64,238

Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows:

DESCRIPTION	LOCATION IN BALANCE SHEET	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Deferred revenue - Current	Deferred revenue	$	282,687	$	307,470
Deferred revenue - Long-term	Other Long-term Liabilities	31,234		33,691

DATA CENTER LESSOR CONSIDERATIONS

Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Codification ("ASC") No. 842 ("ASC 842"), Leases, as amended. Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Storage rental revenue(1)	$	96,328	$	72,411	$	273,547	$	210,805

(1)Revenue associated with power and connectivity included within storage rental revenue was $34,621 and $93,652 for the three and nine months ended September 30, 2022, respectively,

I. STOCK-BASED COMPENSATION

Our stock-based compensation expense includes the cost of stock options, restricted stock units ("RSUs"), performance units ("PUs") and shares of stock issued under our employee stock purchase plan ("ESPP") (together, the "Employee Stock-Based Awards").

2022 RETIREMENT ELIGIBLE CRITERIA

For our Employee Stock-Based Awards made on or after March 1, 2022, we have included the following retirement provision:

•Upon an award recipient'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

Stock-based compensation expense for the Employee Stock-Based Awards for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	14,326	$	13,200	$	45,923	$	46,852

As of September 30, 2022, unrecognized compensation cost related to the unvested portion of our Employee Stock-Based Awards is $52,664.

RESTRICTED STOCK UNITS AND PERFORMANCE UNITS

The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Fair value of RSUs vested	$	4,748	$	8,425	$	26,307	$	31,404
Fair value of earned PUs that vested	13,622		22,030		17,968		27,856

J. 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, facility upgrade and system integration costs (collectively, "Acquisition and Integration Costs"). Acquisition and Integration Costs do not include costs associated with the formation of joint ventures or costs associated with the acquisition of customer relationships. Total Acquisition and Integration Costs is $5,554 and $38,093 for the three and nine months ended September 30, 2022, respectively, and $1,138 and $3,415 for the three and nine months ended September 30, 2021, respectively.

K. (GAIN) LOSS ON DISPOSAL/WRITE-DOWN OF PROPERTY, PLANT AND EQUIPMENT, NET

(Gain) loss on disposal/write-down of property, plant and equipment, net for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021		2022(1)		2021(2)
(Gain) Loss on disposal/write-down of property, plant and equipment, net(3)	$	(14,170)	$	(935)	$	(66,124)	$	(134,321)

(1)    The gain for the nine months ended September 30, 2022 primarily consists of gains of approximately $66,000 associated with sale and sale-leaseback transactions, of which (i) 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 (ii) 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.

(2)    The gain for the nine months ended September 30, 2021 primarily consists of gains of approximately $127,400 associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021.

(3)    The gains recognized during both 2022 and 2021 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 detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Current Report.

L. OTHER (INCOME) EXPENSE, NET

Other (income) expense, net for the three and nine months ended September 30, 2022 and 2021 consists of the following:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Foreign currency transaction (gains) losses, net(1)	$	(58,519)	$	(23,200)	$	(126,759)	$	(16,157)
Debt extinguishment expense	—		—		671		—
Other, net(2)(3)	5,649		4,699		87,902		(183,861)
Other (Income) Expense, Net	$	(52,870)	$	(18,501)	$	(38,186)	$	(200,018)

(1)We recognized net foreign currency transaction gains of $58,519 and $126,759 for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries.

(2)On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. 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. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35,800 associated with the Clutter Transaction (as defined in Note 4).

(3)Other, net for the nine months ended September 30, 2021 is primarily comprised of (a) a gain of approximately $180,600 associated with our IPM Divestment (as defined and discussed in Note 4 to Notes to Consolidated Financial Statements included in our Current Report) and (b) a gain of approximately $20,300 associated with the loss of control and related deconsolidation, as of May 18, 2021, of one of our wholly owned Netherlands subsidiaries, for which we had value-added tax liability exposure that was recorded in 2019.

M. INCOME TAXES

We provide for income taxes during interim periods based on our estimate of the effective tax rate for the year.

Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021(2)		2022(1)		2021(2)
Effective Tax Rate	11.0	%	29.1	%	10.7	%	28.1	%

(1)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9,900 as a result of the ITRenew Transaction.

(2)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021 reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom.

N. INCOME (LOSS) PER SHARE—BASIC AND DILUTED

The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767		428		1,952		2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)	$	192,164	$	67,683	$	434,544	$	388,571
Weighted-average shares—basic	290,937,000		289,762,000		290,673,000		289,255,000
Effect of dilutive potential stock options	1,133,952		869,600		1,126,280		522,642
Effect of dilutive potential RSUs and PUs	480,919		850,655		494,956		918,954
Weighted-average shares—diluted	292,551,871		291,482,255		292,294,236		290,696,596
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic	$	0.66	$	0.23	$	1.49	$	1.34
Diluted	$	0.66	$	0.23	$	1.49	$	1.34
Antidilutive stock options, RSUs and PUs, excluded from the calculation	220,421		351,673		403,362		1,813,880

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Acquisitions

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisitions

On January 25, 2022, in order to expand our ALM operations, we acquired an approximately 80% interest in Intercept Parent, Inc. ("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 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 (the "Deferred Purchase Obligation"). The maximum amount of the Deferred Purchase Obligation would require achievement of the targeted performance metrics at approximately two times the level that is assumed in our fair value estimate of the Deferred Purchase Obligation of $275,100. From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. The Deferred Purchase Obligation is reflected as a long-term liability in our Condensed Consolidated Balance Sheet at September 30, 2022, and, accordingly, 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 will be included as a component of Other (income) expense, net in our Consolidated Statements of Operations until the Deferred Purchase Obligation is settled or paid. ITRenew is presented in Corporate and Other Business (as disclosed in Note 9) and primarily operates in the United States.

PRO FORMA FINANCIAL INFORMATION

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 September 30, 2022, we and ITRenew collectively incurred $59,370 of operating expenditures to complete the ITRenew Transaction (including advisory and professional fees required to complete the ITRenew Transaction). 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.

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Total Revenues	$	1,286,945	$	1,234,386	$	3,842,499	$	3,675,396
Income from Continuing Operations	$	192,931	$	70,491	$	436,627	$	341,096

In addition to our acquisition of ITRenew, we completed certain other acquisitions in 2021 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.

OTHER 2022 ACQUISITIONS

In addition to the ITRenew Transaction, during the nine months ended September 30, 2022, in order to enhance our existing operations in Morocco and expand our fine arts operations in China - Hong Kong S.A.R. and North America, we completed the acquisitions of a records management company, a fine arts company and the assets of a second fine arts company, for a total purchase price of approximately $11,000, including deferred purchase obligation, purchase price holdbacks and other deferred payments of approximately $4,600.

PRELIMINARY PURCHASE PRICE ALLOCATION

A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2022 acquisitions through September 30, 2022 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30, 2022
Cash Paid (gross of cash acquired)(1)	$	756,003
Deferred Purchase Obligation, Purchase Price Holdbacks and Other(2)	279,734
Total Consideration	1,035,737
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash	31,571
Accounts Receivable, Prepaid Expenses and Other Assets	73,351
Property, Plant and Equipment	7,893
Customer and Supplier Relationship Intangible Assets(3)	491,422
Other Intangible Assets(3)	47,300
Operating Lease Right-of-Use Assets	32,680
Accounts Payable, Accrued Expenses and Other Liabilities	(60,683)
Operating Lease Liabilities	(32,680)
Deferred Income Taxes	(142,019)
Total Fair Value of Identifiable Net Assets Acquired	448,835
Goodwill Initially Recorded(4)	$	586,902

(1)Cash paid for acquisitions, net of cash acquired in our Condensed Consolidated Statement of Cash Flows includes contingent and other payments received of $219 for the nine months ended September 30, 2022 related to acquisitions made in the years prior to 2022.

(2)Deferred purchase obligation, purchase price holdbacks and other includes $275,100 related to the fair value estimate of the Deferred Purchase Obligation for the Remaining Interests and approximately $4,600 of deferred purchase obligation, purchase price holdbacks and other associated with our other business and asset acquisitions completed in 2022.

(3)The preliminary weighted average life of the intangible assets acquired in the ITRenew Transaction is approximately 11 years. Intangible assets are included as a component of Other assets, net in our Condensed Consolidated Balance Sheets.

(4)Goodwill is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of us and the acquired businesses.

The preliminary purchase price allocations that are not finalized as of September 30, 2022 relate to the final assessment of the fair values of intangible assets (primarily customer and supplier relationship intangible assets) and property, plant and equipment associated with the acquisitions we closed in 2022. Any adjustments to our estimates of purchase price allocation will be made in the periods in which the adjustments are determined, but no later than the one year measurement period, and the cumulative effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition dates. Adjustments recorded during the nine months ended September 30, 2022 were not material to our results from operations.

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Investments

9 Months Ended

Sep. 30, 2022

Investments, All Other Investments [Abstract]

Investments

In February 2022, the joint venture formed by MakeSpace Labs, Inc. and us (the "MakeSpace JV") entered into an agreement with Clutter, Inc. ("Clutter") pursuant to which the equityholders of the MakeSpace JV contributed their ownership interests in the MakeSpace JV and Clutter’s shareholders contributed their ownership interests in Clutter to create a newly formed venture (the "Clutter JV"). In exchange for our 49.99% interest in the MakeSpace JV, we received an approximate 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 first quarter of 2022.

In April 2021, we closed on an agreement to form a joint venture (the "Web Werks JV") with the shareholders of Web Werks India Private Limited ("Web Werks"), a colocation data center provider in India. In connection with the formation of the Web Werks JV, we made an initial investment of approximately 3,750,000 Indian rupees (or approximately $50,100, based upon the exchange rate between the United States dollar and Indian rupee as of the closing date of the initial investment) in exchange for a noncontrolling interest in the form of convertible preference shares in the Web Werks JV (the "Initial Web Werks JV Investment"). Under the terms of the Web Werks JV shareholder agreement, we are required to make additional investments over a period ending May 2023 totaling approximately 7,500,000 Indian rupees. In August 2022, we made an additional investment of approximately 3,750,000 Indian rupees (or approximately $46,100, based on the exchange rate between the United States dollar and Indian rupee as of the date of the additional investment) in exchange for an additional interest in the form of convertible preference shares in the Web Werks JV (the "Second Web Werks JV Investment"). The shares we received from the Initial Web Werks JV Investment and the Second Web Werks JV Investment are convertible into a to-be-determined amount of equity shares determined by a valuation based on the earnings before interest, taxes, depreciation and amortization ("EBITDA") of the Web Werks JV for the trailing twelve months ending July 31, 2022. Subsequent to the Second Web Werks JV Investment, the shareholders of Web Werks retained control of the financial and operating decisions of the Web Werks JV through their control of Web Werks' board of directors. As we do not control the board of directors or the key management decisions of the Web Werks JV, we account for our interest in the Web Werks JV as an equity method investment.

The following joint ventures are accounted for as equity method investments and are presented as a component of Other within Other assets, net in our Condensed Consolidated Balance Sheets. The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022				DECEMBER 31, 2021
	CARRYING VALUE		EQUITY INTEREST		CARRYING VALUE		EQUITY INTEREST
Web Werks JV	$	97,877	55.40	%	$	51,140	38.50	%
Joint venture with AGC Equity Partners (the "Frankfurt JV")	27,004		20.00	%	26,167		20.00	%
MakeSpace JV	—		—	%	30,154		49.99	%
Clutter JV	57,113		26.73	%	—		—	%

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Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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

In March 2018, we entered into interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. These swap agreements expired in March 2022. In July 2019, we entered into forward-starting interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. As of September 30, 2022, we had $350,000 in notional value outstanding on the interest rate swap agreements, which expire in March 2024 ("March 2024 Interest Rate Swap Agreements"). Under the interest rate swap agreements, we receive variable rate interest payments associated with the notional amount of each interest rate swap, based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements.

We have designated these interest rate swap agreements as cash flow hedges. Unrealized gains are recognized as assets, while unrealized losses are recognized as liabilities.

CROSS-CURRENCY SWAP AGREEMENTS DESIGNATED AS A HEDGE OF NET INVESTMENT

In August 2019, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $110,000 at an interest rate of 6.0% for approximately 99,055 Euros at a weighted average interest rate of approximately 3.65%. These cross-currency swap agreements expire in August 2023 ("August 2023 Cross-Currency Swap Agreements").

In September 2020, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for 300,000 Euros at a weighted average interest rate of approximately 3.4%. These cross-currency swap agreements were set to expire in February 2026. In May 2022, these cross-currency swaps were amended ("February 2026 Cross-Currency Swap Agreements"). Under the terms of the February 2026 Cross-Currency Swap Agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for approximately 340,500 Euros at a weighted average interest rate of approximately 1.2%. These February 2026 Cross-Currency Swap Agreements are set to expire in February 2026.

We have designated these cross-currency swap agreements as a hedge of net investment against certain of our Euro denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap agreements are marked to market at 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.

Assets (liabilities) recognized in our Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021, by derivative instrument, are as follows:

DERIVATIVE INSTRUMENTS(1)	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Cash Flow Hedges(2)
March 2024 Interest Rate Swap Agreements	$	12,879	$	(7,680)
Net Investment Hedges(3)
August 2023 Cross-Currency Swap Agreements	12,938		(664)
February 2026 Cross-Currency Swap Agreements	60,070		11,021

(1)Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net in our Condensed Consolidated Balance Sheets 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 Condensed Consolidated Balance Sheets. As of September 30, 2022, $12,938 is included within Prepaid expenses and other and $72,949 is included within Other assets. As of December 31, 2021, $11,021 is included within Other assets, $2,082 is included within Accrued expense and other current liabilities and $6,262 is included within Other long-term liabilities.

(2)As of September 30, 2022, cumulative net gains of $12,879 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements.

(3)As of September 30, 2022, cumulative net gains of $73,008 are recorded within Accumulated other comprehensive items, net associated with these cross-currency swap agreements.

Unrealized gains (losses) recognized during the three and nine months ended September 30, 2022 and 2021, by derivative instrument, are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DERIVATIVE INSTRUMENTS(1)	2022		2021		2022		2021
Cash Flow Hedges
March 2024 Interest Rate Swap Agreements	$	5,157	$	1,950	$	20,559	$	7,946
Net Investment Hedges
August 2023 Cross-Currency Swap Agreements	6,771		2,655		13,602		5,933
February 2026 Cross-Currency Swap Agreements	20,305		10,060		49,049		21,626

(1)These amounts are recognized as unrealized gains (losses), a component of Accumulated other comprehensive items, net.

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Debt

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Debt

Long-term debt is as follows:

	SEPTEMBER 30, 2022								DECEMBER 31, 2021
	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	$	890,000	$	(7,899)	$	882,101	$	890,000	$	—	$	(5,174)	$	(5,174)	$	—
Term Loan A	243,750		—		243,750		243,750		203,125		—		203,125		203,125
Term Loan B	667,766		(4,059)		663,707		668,500		672,847		(4,995)		667,852		675,500
Australian Dollar Term Loan	193,140		(464)		192,676		193,140		223,182		(656)		222,526		223,530
UK Bilateral Revolving Credit Facility	155,887		(175)		155,712		155,887		189,168		(709)		188,459		189,168
37/8% GBP Senior Notes due 2025 (the "GBP Notes")	445,392		(2,593)		442,799		392,373		540,481		(3,912)		536,569		542,508
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")(1)	1,000,000		(7,110)		992,890		892,500		1,000,000		(8,176)		991,824		1,030,000
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")(1)	825,000		(6,495)		818,505		719,813		825,000		(7,380)		817,620		862,125
5% Senior Notes due 2028 (the "5% Notes due 2028")(1)	500,000		(4,220)		495,780		428,750		500,000		(4,763)		495,237		513,750
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")(1)	1,000,000		(10,126)		989,874		815,000		1,000,000		(11,211)		988,789		1,022,500
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")(1)	1,300,000		(11,783)		1,288,217		1,072,500		1,300,000		(12,911)		1,287,089		1,355,250
41/2% Senior Notes due 2031 (the "41/2% Notes")(1)	1,100,000		(10,471)		1,089,529		847,000		1,100,000		(11,404)		1,088,596		1,094,500
5% Senior Notes due 2032 (the "5% Notes due 2032")	750,000		(12,827)		737,173		579,375		750,000		(13,782)		736,218		767,813
55/8% Senior Notes due 2032 (the "55/8% Notes")(1)	600,000		(5,711)		594,289		477,000		600,000		(6,147)		593,853		637,500
Real Estate Mortgages, Financing Lease Liabilities and Other	407,646		(643)		407,003		407,646		460,648		(840)		459,808		460,648
Accounts Receivable Securitization Program	316,700		(584)		316,116		316,700		—		(450)		(450)		—
Total Long-term Debt	10,395,281		(85,160)		10,310,121				9,364,451		(92,510)		9,271,941
Less Current Portion	(81,275)		—		(81,275)				(310,084)		656		(309,428)
Long-term Debt, Net of Current Portion	$	10,314,006	$	(85,160)	$	10,228,846			$	9,054,367	$	(91,854)	$	8,962,513

(1) Collectively, the "Parent Notes".

See Note 7 to Notes to Consolidated Financial Statements included in our Current Report for additional information regarding our long-term debt, including the direct obligors of each of our debt instruments as well as information regarding the fair value of our debt instruments (including the levels of the fair value hierarchy used to determine the fair value of our debt instruments). The levels of the fair value hierarchy used to determine the fair value of our debt as of September 30, 2022 are consistent with the levels of the fair value hierarchy used to determine the fair value of our debt as of December 31, 2021 (which are disclosed in our Current Report).

CREDIT AGREEMENT

Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the "Revolving Credit Facility"), a term loan A (the "Term Loan A") and a term loan B (the "Term Loan B"). On March 18, 2022, we entered into an amendment to the Credit Agreement, which included the following changes:

(i) extended the maturity date of the Revolving Credit Facility and Term Loan A from June 3, 2023 to March 18, 2027;

(ii) refinanced and increased the borrowing capacity that IMI and certain of its United States and foreign subsidiaries are able to borrow under the Revolving Credit Facility from $1,750,000 to $2,250,000;

(iii) refinanced the existing Term Loan A with a new $250,000 Term Loan A; and

(iv) increased the net total lease adjusted leverage ratio maximum allowable from 6.5x to 7.0x and removed the net secured lease adjusted leverage ratio requirement.

On March 18, 2022, we borrowed the full amount of the Term Loan A. As of September 30, 2022, we had $890,000, $243,750 and $668,500 of outstanding borrowings under the Revolving Credit Facility, Term Loan A and Term Loan B, respectively. In addition, we also had various outstanding letters of credit totaling $3,779. The remaining amount available for borrowing under the Revolving Credit Facility as of September 30, 2022 was $1,356,221 (which represents the maximum availability as of such date). 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, subject to a cap contained therein.

REVOLVING CREDIT FACILITY $2,250,000	TERM LOAN A $250,000	TERM LOAN B $700,000
Outstanding borrowings $890,000	Aggregate outstanding principal amount $243,750	Aggregate outstanding principal amount $668,500
4.7% Interest rate	4.9% Interest rate	4.2% Interest rate
As of September 30, 2022	As of September 30, 2022	As of September 30, 2022

AUSTRALIAN DOLLAR TERM LOAN

Iron Mountain Australia Group Pty, Ltd. ("IM Australia"), a wholly owned subsidiary of IMI, has an AUD term loan with an original principal balance of 350,000 Australian dollars ("AUD Term Loan"). On March 18, 2022, IM Australia amended its AUD Term Loan to (i) extend the maturity date from September 22, 2022 to September 30, 2026 and (ii) decrease the interest rate from BBSY (an Australian benchmark variable interest rate) plus 3.875% to BBSY plus 3.625%. All other terms of the AUD Term Loan remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

OUTSTANDING BORROWINGS AU$302,041 INTEREST RATE 6.7% As of September 30, 2022

UK BILATERAL REVOLVING CREDIT FACILITY

MAXIMUM AMOUNT £140,000 OPTIONAL ADDITIONAL COMMITMENTS £125,000 INTEREST RATE 4.2% As of September 30, 2022

Iron Mountain (UK) PLC and Iron Mountain (UK) Data Centre Limited (collectively, the "UK Borrowers") have a British pounds sterling Revolving Credit Facility (the "UK Bilateral Revolving Credit Facility") with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Revolving Credit Facility is 140,000 British pounds sterling, which was fully drawn as of September 30, 2022. 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. On September 22, 2022, the UK Borrowers exercised their option to extend the maturity date from September 24, 2023 to September 24, 2024. All other material terms of the UK Bilateral Revolving Credit Facility remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report.

ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM On June 29, 2022, we amended the Accounts Receivable Securitization Program to (i) increase the maximum borrowing capacity from $300,000 to $325,000, with an option to increase the borrowing capacity to $400,000, (ii) change the interest rate under Accounts Receivable Securitization Program from LIBOR plus 1.0% to SOFR plus 0.95%, with a credit spread adjustment of 0.10% and (iii) extend the maturity date from July 1, 2023 to July 1, 2025, at which point all obligations become due. All other material terms of the Accounts Receivable Securitization Program remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report. MAXIMUM AMOUNT $325,000
OUTSTANDING BORROWING $316,700
INTEREST RATE 4.1% As of September 30, 2022

CASH POOLING

During the third quarter of 2022, we entered into two new cash pooling arrangements with JP Morgan Chase Bank, N.A. ("JPM"), one of which we utilize to manage global liquidity requirements for our QRSs in the Europe, Middle East, and Africa regions (the "JPM QRS EMEA Cash Pool") and the other for our TRSs in the Europe, Middle East, and Africa regions (the "JPM TRS EMEA Cash Pool"). We continue to utilize our two other cash pooling arrangements with JPM, one of which we utilize to manage global liquidity requirements for our QRSs in the Asia Pacific region (the "JPM QRS APAC Cash Pool") and the other for our TRSs in the Asia Pacific region (the "JPM TRS APAC Cash Pool").

Additionally, we utilize two separate cash pooling arrangements with Bank Mendes Gans ("BMG"), one of which we utilize to manage global liquidity requirements for our QRSs (the "BMG QRS Cash Pool") and the other for our TRSs (the "BMG TRS Cash Pool").

The approximate amount of the net cash position for our cash pools and the approximate amount of the gross position and outstanding debit balances for each of these pools as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION		GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION
BMG QRS Cash Pool	$	590,127	$	(588,633)	$	1,494	$	552,900	$	(552,100)	$	800
BMG TRS Cash Pool	539,557		(538,498)		1,059		606,000		(603,900)		2,100
JPM QRS APAC Cash Pool	23,561		(23,394)		167		9,400		(9,200)		200
JPM TRS APAC Cash Pool	22,272		(21,899)		373		12,000		(9,900)		2,100
JPM QRS EMEA Cash Pool	6,030		(5,718)		312		—		—		—
JPM TRS EMEA Cash Pool	2,104		(2,044)		60		—		—		—

The net cash position balances as of September 30, 2022 and December 31, 2021 are reflected as cash and cash equivalents in our Condensed Consolidated Balance Sheets.

LETTERS OF CREDIT

As of September 30, 2022, we had outstanding letters of credit totaling $37,221, of which $3,779 reduce our borrowing capacity under the Revolving Credit Facility (as described above). The letters of credit expire at various dates between October 2022 and January 2033.

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 fixed charge coverage ratio and a net total lease adjusted leverage 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 earnings before interest, taxes, depreciation and amortization and rent expense ("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 for purposes of those calculations 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 September 30, 2022 and December 31, 2021. Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

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. While the outcome of such 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 $24,000 over the next several years, of which certain amounts would be covered by insurance or indemnity arrangement.

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Stockholders' Equity Matters

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Stockholders' Equity Matters

STOCKHOLDERS' EQUITY MATTERS

In fiscal year 2021 and the nine months ended September 30, 2022, our board of directors declared the following dividends:

DECLARATION DATE	DIVIDEND PER SHARE		RECORD DATE	TOTAL AMOUNT		PAYMENT DATE
February 24, 2021	$	0.6185	March 15, 2021	$	178,569	April 6, 2021
May 6, 2021	0.6185		June 15, 2021	179,026		July 6, 2021
August 5, 2021	0.6185		September 15, 2021	179,080		October 6, 2021
November 4, 2021	0.6185		December 15, 2021	179,132		January 6, 2022
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

On November 3, 2022, we declared a dividend to our stockholders of record as of December 15, 2022 of $0.6185 per share, payable on January 5, 2023.

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Segment Information

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Segment Information

SEGMENT INFORMATION

As discussed in Note 11 to Notes to Consolidated Financial Statements included in our Current Report, in the second quarter of 2022, we reassessed the composition of our reportable segments and note that (i) our Entertainment Services offerings are now managed as part of our Global Records and Information Management ("Global RIM") Business segment; (ii) certain commercial costs that were previously managed as part of Corporate and Other Business are now managed as part of our Global RIM Business segment; and (iii) our ALM services, which includes our legacy secure IT disposition business and our business acquired from ITRenew, are now managed as a separate operating segment that is included in Corporate and Other Business. Previously reported segment information has been restated to conform to the current presentation.

Our reportable segments as of December 31, 2021 are described in Note 11 to Notes to Consolidated Financial Statements included in our Current Report and are as follows:

•Global RIM Business

•Global Data Center Business

•Corporate and Other Business

The operations associated with acquisitions completed during the first nine months of 2022 have been incorporated into our existing reportable segments.

An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Total Revenues	$	1,091,102	$	997,843	$	3,210,469	$	2,971,085
Adjusted EBITDA	483,862		435,904		1,402,025		1,263,277
Global Data Center Business
Total Revenues	$	100,309	$	88,587	$	297,384	$	236,672
Adjusted EBITDA	42,660		35,097		126,944		98,961
Corporate and Other Business
Total Revenues	$	95,534	$	43,718	$	316,672	$	124,187
Adjusted EBITDA	(57,088)		(53,232)		(173,835)		(158,273)
Total Consolidated
Total Revenues	$	1,286,945	$	1,130,148	$	3,824,525	$	3,331,944
Adjusted EBITDA	469,434		417,769		1,355,134		1,203,965

Adjusted EBITDA for each segment is defined 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 •Restructuring charges •(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	•Other (income) expense, net •Stock-based compensation expense

Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocating resources to, our operating segments.

A reconciliation of Net Income (Loss) to Adjusted EBITDA on a consolidated basis for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Add/(Deduct):
Interest expense, net	121,767		103,809		351,266		313,451
Provision (benefit) for income taxes	23,934		28,017		52,097		153,073
Depreciation and amortization	175,077		174,818		536,946		507,145
Acquisition and Integration Costs	5,554		1,138		38,093		3,415
Restructuring charges	3,382		50,432		3,382		129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)		(935)		(66,124)		(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)		(21,517)		(48,814)		(209,001)
Stock-based compensation expense	14,326		12,644		45,923		45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859		1,252		5,869		3,340
Adjusted EBITDA	$	469,434	$	417,769	$	1,355,134	$	1,203,965

Information as to our revenues by product and service lines by segment for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Records Management(1)	$	829,357	$	767,059	$	2,450,903	$	2,285,000
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)	134,519		100,105		374,290		286,665
Data Center(1)	—		—		—		—
Global Data Center Business
Records Management(1)	$	—	$	—	$	—	$	—
Data Management(1)	—		—		—		—
Information Destruction(1)	—		—		—		—
Data Center(1)	100,309		88,587		297,384		236,672
Corporate and Other Business
Records Management(1)	$	35,787	$	30,453	$	103,826	$	91,850
Data Management(1)	—		—		—		—
Information Destruction(1)(3)	59,747		13,265		212,846		32,337
Data Center(1)	—		—		—		—
Total Consolidated
Records Management(1)	$	865,144	$	797,512	$	2,554,729	$	2,376,850
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)(3)	194,266		113,370		587,136		319,002
Data Center(1)	100,309		88,587		297,384		236,672

(1)Each of these offerings has a component of revenue that is storage rental related and a component that is service revenue, except for information destruction, which does not have a storage rental component.

(2)Includes secure shredding services.

(3)Includes product revenue from ITRenew.

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Related Parties	9 Months Ended
	Sep. 30, 2022
Related Party Transactions [Abstract]
Related Parties	RELATED PARTIESIn October 2020, in connection with the formation of the Frankfurt JV, we entered into agreements whereby we will 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"). Revenues and expenses associated with the Frankfurt JV Agreements are presented as a component of our Global Data Center Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $700 and $13,500, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $1,200 and $3,100, respectively, associated with 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"). Revenues and expenses associated with the MakeSpace Agreement and Clutter Agreement are presented as a component of our Global RIM Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $6,900 and $21,300, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $9,300 and $24,900, respectively, associated with the MakeSpace Agreement and Clutter Agreement.

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Restructuring Charges

9 Months Ended

Sep. 30, 2022

Restructuring and Related Activities [Abstract]

Restructuring Charges

RESTRUCTURING CHARGES

PROJECT MATTERHORN

In September 2022, we announced a global program designed to accelerate the growth of our business (“Project Matterhorn”). Project Matterhorn investments will focus on transforming our operating model to a global operating model. This program is designed to allow us to shift from a product-based to a solution-based sales approach to better serve our customers’ needs and establish a global operating model that is designed to allow us to optimize our shared services and best practices. We expect to incur approximately $150,000 in costs annually related to Project Matterhorn from 2023 through 2025. Total costs related to Project Matterhorn for the three and nine months ended September 30, 2022 were not material.

PROJECT SUMMIT

In October 2019, we announced our global program designed to better position us for future growth and achievement of our strategic objectives ("Project Summit") which we completed as of December 31, 2021.

The implementation of Project Summit resulted in total operating expenditures of approximately $450,000 that primarily consisted of: (1) employee severance costs; (2) internal costs associated with the development and implementation of Project Summit initiatives; (3) professional fees, primarily related to third party consultants who assisted with the design and execution of various initiatives as well as project management activities and (4) system implementation and data conversion costs. As Project Summit was completed as of December 31, 2021, there were no restructuring charges for the three and nine months ended September 30, 2022. Total restructuring charges for the three and nine months ended September 30, 2021 was $50,432 and $129,686, respectively, and consisted of (i) employee severance costs of $6,797 and $14,526, respectively, and (ii) professional fees and other costs of $43,635 and $115,160, respectively.

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Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Cash and Cash Equivalents	CASH AND CASH EQUIVALENTSCash 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.
Accounts Receivable	ACCOUNTS RECEIVABLE 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.
Inventory	INVENTORYInventories are stated at the lower of cost or net realizable value, based on a first-in, first-out methodology. Our inventory primarily consists of information technology-related assets including memory, central processing units, hard drives, adaptors and networking. All of our inventory is considered finished goods. Inventory is included as a component of Prepaid expenses and other in our Condensed Consolidated Balance Sheets.
Leases	LEASES We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located.
Revenues	The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, "Contract Fulfillment Costs").DATA CENTER LESSOR CONSIDERATIONSOur Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Codification ("ASC") No. 842 ("ASC 842"), Leases, as amended.
Income Taxes	INCOME TAXESWe provide for income taxes during interim periods based on our estimate of the effective tax rate for the year.
Commitments and Contingencies	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. While the outcome of such 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.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

Schedule of Allowance for Credit Loss

The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2022 is as follows:

Balance as of December 31, 2021	$	62,009
Credit memos charged to revenue	41,722
Allowance for bad debts charged to expense	10,691
Deductions and other(1)	(61,727)
Balance as of September 30, 2022	$	52,695

(1)Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments.

Schedule of Operating and Financing Lease Right-of-Use Assets and Lease Liabilities

Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2022 and December 31, 2021 are as follows:

DESCRIPTION	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Assets:
Operating lease right-of-use assets	$	2,556,253	$	2,314,422
Financing lease right-of-use assets, net of accumulated depreciation(1)	250,627		298,049
Liabilities:
Current
Operating lease liabilities	$	270,311	$	259,597
Financing lease liabilities(1)	34,622		41,168
Long-term
Operating lease liabilities	$	2,405,751	$	2,171,472
Financing lease liabilities(1)	276,627		315,561

(1)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 Condensed Consolidated Balance Sheets.

Schedule of Lease Costs and Other Information

The components of the lease expense for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Operating lease cost(1)	$	145,293	$	140,551	$	428,686	$	408,312
Financing lease cost:
Depreciation of financing lease right-of-use assets	$	10,186	$	14,006	$	32,218	$	39,062
Interest expense for financing lease liabilities	4,126		5,055		13,163		14,940

(1)Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $30,730 and $89,647 for the three and nine months ended September 30, 2022, respectively, and $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively.

Supplemental cash flow information relating to our leases for the nine months ended September 30, 2022 and 2021 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30,
CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES:	2022		2021
Operating cash flows used in operating leases	$	302,442	$	291,535
Operating cash flows used in financing leases (interest)	13,163		14,940
Financing cash flows used in financing leases	29,254		35,360
NON-CASH ITEMS:
Operating lease modifications and reassessments	$	145,133	$	103,158
New operating leases (including acquisitions and sale-leaseback transactions)	485,673		240,822

Schedule of Changes in the Carrying Value of Goodwill Attributable to Each Reportable Operating Segment

The changes in the carrying value of goodwill attributable to each reportable segment for the nine months ended September 30, 2022 are as follows:

	GLOBAL RIM BUSINESS		GLOBAL DATA CENTER BUSINESS		CORPORATE AND OTHER BUSINESS		TOTAL CONSOLIDATED
Goodwill balance, net of accumulated amortization as of December 31, 2021(1)	$	3,972,852	$	426,074	$	64,605	$	4,463,531
Tax deductible goodwill acquired during the year	—		—		762		762
Non-tax deductible goodwill acquired during the period	696		—		585,444		586,140
Fair value and other adjustments(2)	(12,101)		—		384		(11,717)
Currency effects	(186,056)		(18,287)		(3,067)		(207,410)
Goodwill balance, net of accumulated amortization as of September 30, 2022	$	3,775,391	$	407,787	$	648,128	$	4,831,306
Accumulated goodwill impairment balance as of September 30, 2022	$	132,409	$	—	$	26,011	$	158,420

(1)The balances as of December 31, 2021 have been recast to reflect the segment changes described in our Current Report.

(2)This amount primarily represents an adjustment to goodwill as a result of the deconsolidation of certain businesses, as described in Note 2.l.

Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis

The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2022 and December 31, 2021 are as follows:

			FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2022 USING
DESCRIPTION	TOTAL CARRYING VALUE AT SEPTEMBER 30, 2022		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	18,861	$	—	$	18,861	$	—
Time Deposits	1,123		—		1,123		—
Trading Securities	9,085		9,049		36		—
Derivative Assets	85,887		—		85,887		—
Deferred Purchase Obligation (as defined in Note 3)	275,100		—		—		275,100

			FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2021 USING
DESCRIPTION	TOTAL CARRYING VALUE AT DECEMBER 31, 2021		QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)		SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)		SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Money Market Funds	$	101,022	$	—	$	101,022	$	—
Time Deposits	2,238		—		2,238		—
Trading Securities	11,147		11,062		85		—
Derivative Assets	11,021		—		11,021		—
Derivative Liabilities	8,344		—		8,344		—

Schedule of Changes in Accumulated Other Comprehensive Items, Net

The changes in Accumulated other comprehensive items, net for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30, 2022						THREE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(500,629)	$	53,654	$	(446,975)	$	(229,790)	$	(28,863)	$	(258,653)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)		—		(174,739)		(90,465)		—		(90,465)
Change in fair value of derivative instruments	—		32,233		32,233		—		14,665		14,665
Total other comprehensive (loss) income	(174,739)		32,233		(142,506)		(90,465)		14,665		(75,800)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

	NINE MONTHS ENDED SEPTEMBER 30, 2022						NINE MONTHS ENDED SEPTEMBER 30, 2021
	FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL		FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS		CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS		TOTAL
Beginning of Period	$	(341,024)	$	2,677	$	(338,347)	$	(206,190)	$	(49,703)	$	(255,893)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(334,344)		—		(334,344)		(114,065)		—		(114,065)
Change in fair value of derivative instruments	—		83,210		83,210		—		35,505		35,505
Total other comprehensive (loss) income	(334,344)		83,210		(251,134)		(114,065)		35,505		(78,560)
End of Period	$	(675,368)	$	85,887	$	(589,481)	$	(320,255)	$	(14,198)	$	(334,453)

Schedule of Cost and Accumulated Amortization Associated with Contract Fulfillment Costs

Contract Fulfillment Costs as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT		GROSS CARRYING AMOUNT		ACCUMULATED AMORTIZATION		NET CARRYING AMOUNT
Intake Costs asset	$	63,856	$	(40,045)	$	23,811	$	71,336	$	(42,678)	$	28,658
Commissions asset	124,081		(54,948)		69,133		114,791		(50,553)		64,238

Schedule of Deferred Revenue Liabilities

Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows:

DESCRIPTION	LOCATION IN BALANCE SHEET	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Deferred revenue - Current	Deferred revenue	$	282,687	$	307,470
Deferred revenue - Long-term	Other Long-term Liabilities	31,234		33,691

Schedule of Revenue

Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Storage rental revenue(1)	$	96,328	$	72,411	$	273,547	$	210,805

(1)Revenue associated with power and connectivity included within storage rental revenue was $34,621 and $93,652 for the three and nine months ended September 30, 2022, respectively, and $14,639 and $42,333 for the three and nine months ended September 30, 2021, respectively.

Schedule of Stock-based Compensation Expense

Stock-based compensation expense for the Employee Stock-Based Awards for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	14,326	$	13,200	$	45,923	$	46,852

Schedule of Fair Value of RSU and Earned PUs Vested

The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Fair value of RSUs vested	$	4,748	$	8,425	$	26,307	$	31,404
Fair value of earned PUs that vested	13,622		22,030		17,968		27,856

Schedule of Components of Gain/Loss on Sale/Disposal of Property, Plant and Equipment

(Gain) loss on disposal/write-down of property, plant and equipment, net for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021		2022(1)		2021(2)
(Gain) Loss on disposal/write-down of property, plant and equipment, net(3)	$	(14,170)	$	(935)	$	(66,124)	$	(134,321)

(1)    The gain for the nine months ended September 30, 2022 primarily consists of gains of approximately $66,000 associated with sale and sale-leaseback transactions, of which (i) 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 (ii) 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.

(2)    The gain for the nine months ended September 30, 2021 primarily consists of gains of approximately $127,400 associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021.

(3)    The gains recognized during both 2022 and 2021 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 detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Current Report.

Schedule of Other (Income) Expense, Net

Other (income) expense, net for the three and nine months ended September 30, 2022 and 2021 consists of the following:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION	2022		2021		2022		2021
Foreign currency transaction (gains) losses, net(1)	$	(58,519)	$	(23,200)	$	(126,759)	$	(16,157)
Debt extinguishment expense	—		—		671		—
Other, net(2)(3)	5,649		4,699		87,902		(183,861)
Other (Income) Expense, Net	$	(52,870)	$	(18,501)	$	(38,186)	$	(200,018)

(1)We recognized net foreign currency transaction gains of $58,519 and $126,759 for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries.

(2)On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. 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. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35,800 associated with the Clutter Transaction (as defined in Note 4).

(3)Other, net for the nine months ended September 30, 2021 is primarily comprised of (a) a gain of approximately $180,600 associated with our IPM Divestment (as defined and discussed in Note 4 to Notes to Consolidated Financial Statements included in our Current Report) and (b) a gain of approximately $20,300 associated with the loss of control and related deconsolidation, as of May 18, 2021, of one of our wholly owned Netherlands subsidiaries, for which we had value-added tax liability exposure that was recorded in 2019.

Schedule of Income Taxes

Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022(1)		2021(2)		2022(1)		2021(2)
Effective Tax Rate	11.0	%	29.1	%	10.7	%	28.1	%

(1)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9,900 as a result of the ITRenew Transaction.

(2)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021 reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom.

Schedule of Basic and Diluted Net Income (Loss) per Share Attributable to the Entity

The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767		428		1,952		2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)	$	192,164	$	67,683	$	434,544	$	388,571
Weighted-average shares—basic	290,937,000		289,762,000		290,673,000		289,255,000
Effect of dilutive potential stock options	1,133,952		869,600		1,126,280		522,642
Effect of dilutive potential RSUs and PUs	480,919		850,655		494,956		918,954
Weighted-average shares—diluted	292,551,871		291,482,255		292,294,236		290,696,596
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic	$	0.66	$	0.23	$	1.49	$	1.34
Diluted	$	0.66	$	0.23	$	1.49	$	1.34
Antidilutive stock options, RSUs and PUs, excluded from the calculation	220,421		351,673		403,362		1,813,880

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Acquisitions (Tables)

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Business Acquisition, Pro Forma Information

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.

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Total Revenues	$	1,286,945	$	1,234,386	$	3,842,499	$	3,675,396
Income from Continuing Operations	$	192,931	$	70,491	$	436,627	$	341,096

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2022 acquisitions through September 30, 2022 is as follows:

	NINE MONTHS ENDED SEPTEMBER 30, 2022
Cash Paid (gross of cash acquired)(1)	$	756,003
Deferred Purchase Obligation, Purchase Price Holdbacks and Other(2)	279,734
Total Consideration	1,035,737
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash	31,571
Accounts Receivable, Prepaid Expenses and Other Assets	73,351
Property, Plant and Equipment	7,893
Customer and Supplier Relationship Intangible Assets(3)	491,422
Other Intangible Assets(3)	47,300
Operating Lease Right-of-Use Assets	32,680
Accounts Payable, Accrued Expenses and Other Liabilities	(60,683)
Operating Lease Liabilities	(32,680)
Deferred Income Taxes	(142,019)
Total Fair Value of Identifiable Net Assets Acquired	448,835
Goodwill Initially Recorded(4)	$	586,902

(1)Cash paid for acquisitions, net of cash acquired in our Condensed Consolidated Statement of Cash Flows includes contingent and other payments received of $219 for the nine months ended September 30, 2022 related to acquisitions made in the years prior to 2022.

(2)Deferred purchase obligation, purchase price holdbacks and other includes $275,100 related to the fair value estimate of the Deferred Purchase Obligation for the Remaining Interests and approximately $4,600 of deferred purchase obligation, purchase price holdbacks and other associated with our other business and asset acquisitions completed in 2022.

(3)The preliminary weighted average life of the intangible assets acquired in the ITRenew Transaction is approximately 11 years. Intangible assets are included as a component of Other assets, net in our Condensed Consolidated Balance Sheets.

(4)Goodwill is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of us and the acquired businesses.

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Investments (Tables)

9 Months Ended

Sep. 30, 2022

Investments, All Other Investments [Abstract]

Schedule of Equity Method Investments

The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022				DECEMBER 31, 2021
	CARRYING VALUE		EQUITY INTEREST		CARRYING VALUE		EQUITY INTEREST
Web Werks JV	$	97,877	55.40	%	$	51,140	38.50	%
Joint venture with AGC Equity Partners (the "Frankfurt JV")	27,004		20.00	%	26,167		20.00	%
MakeSpace JV	—		—	%	30,154		49.99	%
Clutter JV	57,113		26.73	%	—		—	%

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Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

Assets (liabilities) recognized in our Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021, by derivative instrument, are as follows:

DERIVATIVE INSTRUMENTS(1)	SEPTEMBER 30, 2022		DECEMBER 31, 2021
Cash Flow Hedges(2)
March 2024 Interest Rate Swap Agreements	$	12,879	$	(7,680)
Net Investment Hedges(3)
August 2023 Cross-Currency Swap Agreements	12,938		(664)
February 2026 Cross-Currency Swap Agreements	60,070		11,021

(1)Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net in our Condensed Consolidated Balance Sheets 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 Condensed Consolidated Balance Sheets. As of September 30, 2022, $12,938 is included within Prepaid expenses and other and $72,949 is included within Other assets. As of December 31, 2021, $11,021 is included within Other assets, $2,082 is included within Accrued expense and other current liabilities and $6,262 is included within Other long-term liabilities.

(2)As of September 30, 2022, cumulative net gains of $12,879 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements.

(3)As of September 30, 2022, cumulative net gains of $73,008 are recorded within Accumulated other comprehensive items, net associated with these cross-currency swap agreements.

Schedule of Gains(Losses) for Derivative Instruments

Unrealized gains (losses) recognized during the three and nine months ended September 30, 2022 and 2021, by derivative instrument, are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
DERIVATIVE INSTRUMENTS(1)	2022		2021		2022		2021
Cash Flow Hedges
March 2024 Interest Rate Swap Agreements	$	5,157	$	1,950	$	20,559	$	7,946
Net Investment Hedges
August 2023 Cross-Currency Swap Agreements	6,771		2,655		13,602		5,933
February 2026 Cross-Currency Swap Agreements	20,305		10,060		49,049		21,626

(1)These amounts are recognized as unrealized gains (losses), a component of Accumulated other comprehensive items, net.

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Debt (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of Carrying Amount and Fair Value of Long-Term Debt Instruments

Long-term debt is as follows:

	SEPTEMBER 30, 2022								DECEMBER 31, 2021
	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	$	890,000	$	(7,899)	$	882,101	$	890,000	$	—	$	(5,174)	$	(5,174)	$	—
Term Loan A	243,750		—		243,750		243,750		203,125		—		203,125		203,125
Term Loan B	667,766		(4,059)		663,707		668,500		672,847		(4,995)		667,852		675,500
Australian Dollar Term Loan	193,140		(464)		192,676		193,140		223,182		(656)		222,526		223,530
UK Bilateral Revolving Credit Facility	155,887		(175)		155,712		155,887		189,168		(709)		188,459		189,168
37/8% GBP Senior Notes due 2025 (the "GBP Notes")	445,392		(2,593)		442,799		392,373		540,481		(3,912)		536,569		542,508
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")(1)	1,000,000		(7,110)		992,890		892,500		1,000,000		(8,176)		991,824		1,030,000
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")(1)	825,000		(6,495)		818,505		719,813		825,000		(7,380)		817,620		862,125
5% Senior Notes due 2028 (the "5% Notes due 2028")(1)	500,000		(4,220)		495,780		428,750		500,000		(4,763)		495,237		513,750
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")(1)	1,000,000		(10,126)		989,874		815,000		1,000,000		(11,211)		988,789		1,022,500
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")(1)	1,300,000		(11,783)		1,288,217		1,072,500		1,300,000		(12,911)		1,287,089		1,355,250
41/2% Senior Notes due 2031 (the "41/2% Notes")(1)	1,100,000		(10,471)		1,089,529		847,000		1,100,000		(11,404)		1,088,596		1,094,500
5% Senior Notes due 2032 (the "5% Notes due 2032")	750,000		(12,827)		737,173		579,375		750,000		(13,782)		736,218		767,813
55/8% Senior Notes due 2032 (the "55/8% Notes")(1)	600,000		(5,711)		594,289		477,000		600,000		(6,147)		593,853		637,500
Real Estate Mortgages, Financing Lease Liabilities and Other	407,646		(643)		407,003		407,646		460,648		(840)		459,808		460,648
Accounts Receivable Securitization Program	316,700		(584)		316,116		316,700		—		(450)		(450)		—
Total Long-term Debt	10,395,281		(85,160)		10,310,121				9,364,451		(92,510)		9,271,941
Less Current Portion	(81,275)		—		(81,275)				(310,084)		656		(309,428)
Long-term Debt, Net of Current Portion	$	10,314,006	$	(85,160)	$	10,228,846			$	9,054,367	$	(91,854)	$	8,962,513

(1) Collectively, the "Parent Notes".

Schedule of Net Cash Position in Cash Pool Agreements

The approximate amount of the net cash position for our cash pools and the approximate amount of the gross position and outstanding debit balances for each of these pools as of September 30, 2022 and December 31, 2021 are as follows:

	SEPTEMBER 30, 2022						DECEMBER 31, 2021
	GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION		GROSS CASH POSITION		OUTSTANDING DEBIT BALANCES		NET CASH POSITION
BMG QRS Cash Pool	$	590,127	$	(588,633)	$	1,494	$	552,900	$	(552,100)	$	800
BMG TRS Cash Pool	539,557		(538,498)		1,059		606,000		(603,900)		2,100
JPM QRS APAC Cash Pool	23,561		(23,394)		167		9,400		(9,200)		200
JPM TRS APAC Cash Pool	22,272		(21,899)		373		12,000		(9,900)		2,100
JPM QRS EMEA Cash Pool	6,030		(5,718)		312		—		—		—
JPM TRS EMEA Cash Pool	2,104		(2,044)		60		—		—		—

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Stockholders' Equity Matters (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Schedule of Dividend Declared and Payments

In fiscal year 2021 and the nine months ended September 30, 2022, our board of directors declared the following dividends:

DECLARATION DATE	DIVIDEND PER SHARE		RECORD DATE	TOTAL AMOUNT		PAYMENT DATE
February 24, 2021	$	0.6185	March 15, 2021	$	178,569	April 6, 2021
May 6, 2021	0.6185		June 15, 2021	179,026		July 6, 2021
August 5, 2021	0.6185		September 15, 2021	179,080		October 6, 2021
November 4, 2021	0.6185		December 15, 2021	179,132		January 6, 2022
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

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Schedule of Analysis of Business Segment Information

An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Total Revenues	$	1,091,102	$	997,843	$	3,210,469	$	2,971,085
Adjusted EBITDA	483,862		435,904		1,402,025		1,263,277
Global Data Center Business
Total Revenues	$	100,309	$	88,587	$	297,384	$	236,672
Adjusted EBITDA	42,660		35,097		126,944		98,961
Corporate and Other Business
Total Revenues	$	95,534	$	43,718	$	316,672	$	124,187
Adjusted EBITDA	(57,088)		(53,232)		(173,835)		(158,273)
Total Consolidated
Total Revenues	$	1,286,945	$	1,130,148	$	3,824,525	$	3,331,944
Adjusted EBITDA	469,434		417,769		1,355,134		1,203,965

Schedule of Reconciliation of Net Income (Loss) to Adjusted EBITDA

A reconciliation of Net Income (Loss) to Adjusted EBITDA on a consolidated basis for the three and nine months ended September 30, 2022 and 2021 is as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Net Income (Loss)	$	192,931	$	68,111	$	436,496	$	391,264
Add/(Deduct):
Interest expense, net	121,767		103,809		351,266		313,451
Provision (benefit) for income taxes	23,934		28,017		52,097		153,073
Depreciation and amortization	175,077		174,818		536,946		507,145
Acquisition and Integration Costs	5,554		1,138		38,093		3,415
Restructuring charges	3,382		50,432		3,382		129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)		(935)		(66,124)		(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)		(21,517)		(48,814)		(209,001)
Stock-based compensation expense	14,326		12,644		45,923		45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859		1,252		5,869		3,340
Adjusted EBITDA	$	469,434	$	417,769	$	1,355,134	$	1,203,965

Schedule of Revenues by Product and Service Lines by Segment

Information as to our revenues by product and service lines by segment for the three and nine months ended September 30, 2022 and 2021 are as follows:

	THREE MONTHS ENDED SEPTEMBER 30,				NINE MONTHS ENDED SEPTEMBER 30,
	2022		2021		2022		2021
Global RIM Business
Records Management(1)	$	829,357	$	767,059	$	2,450,903	$	2,285,000
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)	134,519		100,105		374,290		286,665
Data Center(1)	—		—		—		—
Global Data Center Business
Records Management(1)	$	—	$	—	$	—	$	—
Data Management(1)	—		—		—		—
Information Destruction(1)	—		—		—		—
Data Center(1)	100,309		88,587		297,384		236,672
Corporate and Other Business
Records Management(1)	$	35,787	$	30,453	$	103,826	$	91,850
Data Management(1)	—		—		—		—
Information Destruction(1)(3)	59,747		13,265		212,846		32,337
Data Center(1)	—		—		—		—
Total Consolidated
Records Management(1)	$	865,144	$	797,512	$	2,554,729	$	2,376,850
Data Management(1)	127,226		130,679		385,276		399,420
Information Destruction(1)(2)(3)	194,266		113,370		587,136		319,002
Data Center(1)	100,309		88,587		297,384		236,672

(1)Each of these offerings has a component of revenue that is storage rental related and a component that is service revenue, except for information destruction, which does not have a storage rental component.

(2)Includes secure shredding services.

(3)Includes product revenue from ITRenew.

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Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Credit Memo Reserves (Details) - Allowance for doubtful accounts $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 62,009
Credit memos charged to revenue	41,722
Allowance for bad debts charged to expense	10,691
Deductions and other	(61,727)
Ending balance	$ 52,695

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Summary of Significant Accounting Policies- Inventory (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Inventory	$ 14,565,000	$ 0

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Summary of Significant Accounting Policies - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 2,556,253	$ 2,314,422
Financing lease right-of-use assets, net of accumulated depreciation	250,627	298,049
Current
Operating lease liabilities	270,311	259,597
Finance lease liabilities	34,622	41,168
Long-term
Operating lease liabilities	2,405,751	2,171,472
Finance lease liabilities	$ 276,627	$ 315,561
Finance lease, right-of-use asset, statement of financial position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Operating lease, liability, current, statement of financial position [Extensible List]	Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)
Finance lease, liability, current, statement of financial position [Extensible List]	Current portion of long-term debt	Current portion of long-term debt
Finance lease, liability, noncurrent, statement of financial position [Extensible List]	Long-term Debt, net of current portion	Long-term Debt, net of current portion

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Summary of Significant Accounting Policies - Leases Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Operating lease cost	$ 145,293	$ 140,551	$ 428,686	$ 408,312
Depreciation of financing lease right-of-use assets	10,186	14,006	32,218	39,062
Interest expense for financing lease liabilities	4,126	5,055		14,940
Variable lease costs	$ 30,730	$ 28,835	$ 89,647	$ 86,422

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Summary of Significant Accounting Policies - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Operating cash flows used in operating leases	$ 302,442	$ 291,535
Operating cash flows used in financing leases (interest)	13,163	14,940
Financing cash flows used in financing leases	29,254	35,360
Operating lease modifications and reassessments	145,133	103,158
New operating leases (including acquisitions and sale-leaseback transactions)	$ 485,673	$ 240,822

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Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	$ 4,463,531
Tax deductible goodwill acquired during the year	762
Non-tax deductible goodwill acquired during the period	586,140
Fair value and other adjustments	(11,717)
Currency effects	(207,410)
Goodwill ending balance	4,831,306
Accumulated goodwill impairment	158,420
GLOBAL RIM BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	3,972,852
Tax deductible goodwill acquired during the year	0
Non-tax deductible goodwill acquired during the period	696
Fair value and other adjustments	(12,101)
Currency effects	(186,056)
Goodwill ending balance	3,775,391
Accumulated goodwill impairment	132,409
GLOBAL DATA CENTER BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	426,074
Tax deductible goodwill acquired during the year	0
Non-tax deductible goodwill acquired during the period	0
Fair value and other adjustments	0
Currency effects	(18,287)
Goodwill ending balance	407,787
Accumulated goodwill impairment	0
CORPORATE AND OTHER BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	64,605
Tax deductible goodwill acquired during the year	762
Non-tax deductible goodwill acquired during the period	585,444
Fair value and other adjustments	384
Currency effects	(3,067)
Goodwill ending balance	648,128
Accumulated goodwill impairment	$ 26,011

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Summary of Significant Accounting Policies - Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Derivative Assets		$ 11,021
Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	$ 9,049	11,062
Derivative Assets	0	0
Derivative Liabilities		0
Deferred purchase obligation	0
Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	36	85
Derivative Assets	85,887	11,021
Derivative Liabilities		8,344
Deferred purchase obligation	0
Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	0	0
Derivative Assets	0	0
Derivative Liabilities		0
Deferred purchase obligation	275,100
Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	9,085	11,147
Derivative Assets	85,887	11,021
Derivative Liabilities		8,344
Deferred purchase obligation	275,100
Money Market Funds | Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Money Market Funds | Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	18,861	101,022
Money Market Funds | Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Money Market Funds | Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	18,861	101,022
Time Deposits | Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Time Deposits | Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	1,123	2,238
Time Deposits | Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Time Deposits | Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	$ 1,123	$ 2,238

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Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Rollforward
Beginning of Period	$ 651,775	$ 1,147,742	$ 857,068	$ 1,136,729
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)	(90,465)	(334,344)	(114,065)
Change in fair value of derivative instruments	32,233	14,665	83,210	35,505
Total other comprehensive (loss) income	(142,506)	(75,800)	(251,134)	(78,560)
End of period	533,839	975,146	533,839	975,146
FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS
AOCI Rollforward
Beginning of Period	(500,629)	(229,790)	(341,024)	(206,190)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)	(90,465)	(334,344)	(114,065)
Change in fair value of derivative instruments	0	0	0	0
Total other comprehensive (loss) income	(174,739)	(90,465)	(334,344)	(114,065)
End of period	(675,368)	(320,255)	(675,368)	(320,255)
CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS
AOCI Rollforward
Beginning of Period	53,654	(28,863)	2,677	(49,703)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	0	0	0	0
Change in fair value of derivative instruments	32,233	14,665	83,210	35,505
Total other comprehensive (loss) income	32,233	14,665	83,210	35,505
End of period	85,887	(14,198)	85,887	(14,198)
TOTAL
AOCI Rollforward
Beginning of Period	(446,975)	(258,653)	(338,347)	(255,893)
Other comprehensive (loss) income:
End of period	$ (589,481)	$ (334,453)	$ (589,481)	$ (334,453)

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Summary of Significant Accounting Policies - Contract Fulfillment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Intake Costs asset
Contract With Customer, Asset And Liabilities [Line Items]
GROSS CARRYING AMOUNT	$ 63,856	$ 71,336
ACCUMULATED AMORTIZATION	(40,045)	(42,678)
NET CARRYING AMOUNT	23,811	28,658
Commissions asset
Contract With Customer, Asset And Liabilities [Line Items]
GROSS CARRYING AMOUNT	124,081	114,791
ACCUMULATED AMORTIZATION	(54,948)	(50,553)
NET CARRYING AMOUNT	$ 69,133	$ 64,238

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Summary of Significant Accounting Policies - Summary of Deferred Revenue Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Deferred revenue - Current	$ 282,687	$ 307,470
Deferred revenue - Long-term	$ 31,234	$ 33,691

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Summary of Significant Accounting Policies - Storage Rental (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessor, Lease, Description [Line Items]
Storage rental	$ 760,370	$ 718,614	$ 2,264,566	$ 2,144,942
GLOBAL DATA CENTER BUSINESS
Lessor, Lease, Description [Line Items]
Storage rental	96,328	72,411	273,547	210,805
Storage Rental, Power and Connectivity | GLOBAL DATA CENTER BUSINESS
Lessor, Lease, Description [Line Items]
Storage rental	$ 34,621	$ 14,639	$ 93,652	$ 42,333

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Summary of Significant Accounting Policies - Stock-Based Compensation Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) yr	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) yr	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of recipient | yr	55		55
Service period			5 years
Unrecognized compensation cost	$ 52,664		$ 52,664
Stock-based Compensation Expense [Abstract]
Stock-based compensation expense	14,326	$ 13,200	45,923	$ 46,852
Restricted Stock Units
Summary of Option Activity
Total fair value of shares or units vested	4,748	8,425	26,307	31,404
Performance units
Summary of Option Activity
Total fair value of shares or units vested	$ 13,622	$ 22,030	$ 17,968	$ 27,856
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of recipient | yr	65		65

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Summary of Significant Accounting Policies - Acquisition and Integration costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Acquisition and Integration Costs	$ 5,554	$ 1,138	$ 38,093	$ 3,415

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Summary of Significant Accounting Policies - (Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment, Net (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022 USD ($) facility	Jun. 30, 2022 USD ($) facility	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
(Gain) loss on disposal/write-down of property, plant and equipment, net | $	$ (14,170)		$ (935)	$ (66,124)	$ (134,321)
Facilities And Parcels Of Land In the United States
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale and sale-leaseback transactions | $	$ 17,000	$ 49,000		$ 66,000
Number of sale lease back properties		11
Facilities In United States
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of sale lease back properties	2
Facilities in Canada
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of sale lease back properties	1
Facilities In The United Kingdom
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale and sale-leaseback transactions | $					$ 127,400
Number of sale lease back properties	5

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Summary of Significant Accounting Policies - Other (Income) Expense, Net (Details) € in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
	May 18, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Sep. 30, 2021 USD ($)
Accounting Policies [Abstract]
Foreign currency transaction (gains) losses, net		$ (58,519)	€ (58,519)		$ (23,200)	$ (126,759)	€ (126,759)	$ (16,157)
Debt extinguishment expense		0			0	671		0
Other, net		5,649			4,699	87,902		(183,861)
Other (Income) Expense, Net		(52,870)			(18,501)	(38,186)		(200,018)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency transaction gain		$ 58,519	€ 58,519		$ 23,200	126,759	€ 126,759	16,157
Gain (loss) on disposal						(105,825)		0
Gain on IPM divestment	$ 20,300					$ 0		180,569
IPM Divestment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on IPM divestment								$ 180,600
OSG Records Management (Europe) Limited
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal				$ (105,800)
Clutter JV
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal				$ 35,800

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Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Accounting Policies [Abstract]
Effective Tax Rate	11.00%	29.10%	10.70%	28.10%
Federal statutory tax rate	21.00%	21.00%	21.00%	21.00%
Deferred tax assets					$ 9,900
Expense related to change in enacted tax law				$ 12

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Summary of Significant Accounting Policies - Income (Loss) Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income (Loss) Per Share-Basic and Diluted
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767	428	1,952	2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)	$ 192,164	$ 67,683	$ 434,544	$ 388,571
Weighted-average shares—basic (in shares)	290,937,000	289,762,000	290,673,000	289,255,000
Effect of dilutive potential stock options (in shares)	1,133,952	869,600	1,126,280	522,642
Effect of dilutive potential restricted stock, RSUs and PUs (in shares)	480,919	850,655	494,956	918,954
Weighted-average shares—diluted (in shares)	292,551,871	291,482,255	292,294,236	290,696,596
Basic (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares)	220,421	351,673	403,362	1,813,880

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Acquisitions - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 25, 2022	Sep. 30, 2022	Sep. 30, 2021	Jan. 25, 2025	Jan. 25, 2024
Business Acquisition [Line Items]
Cash paid for acquisitions, net of cash acquired		$ 724,213	$ 203,752
ITRenew
Business Acquisition [Line Items]
Ownership acquired	80.00%
Total Consideration	$ 725
Cash paid (gross of cash acquired)	748,846
Net cash acquired	30,720
Cash paid for acquisitions, net of cash acquired	$ 718,126
Possible subsequent percentage acquired	20.00%
Deferred purchase obligation	$ 275,100
Consolidation percentage	100.00%
Operating expenditures		59,370
ITRenew | Minimum
Business Acquisition [Line Items]
Value of possible subsequent acquisition	$ 200
ITRenew | Maximum
Business Acquisition [Line Items]
Value of possible subsequent acquisition	531,000
ITRenew | Second Anniversary | Forecast
Business Acquisition [Line Items]
Possible subsequent percentage acquired					16.00%
ITRenew | Third Anniversary | Forecast
Business Acquisition [Line Items]
Possible subsequent percentage acquired				4.00%
Other 2022 Acquisition
Business Acquisition [Line Items]
Total Consideration	$ 11,000
Deferred purchase obligation, purchase price holdbacks and other		$ 4,600

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Acquisitions - Pro Forma Financial Information (Details) - ITRenew - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Revenues	$ 1,286,945	$ 1,234,386	$ 3,842,499	$ 3,675,396
Income from Continuing Operations	$ 192,931	$ 70,491	$ 436,627	$ 341,096

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Acquisitions - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 25, 2022	Sep. 30, 2022	Dec. 31, 2021
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Operating Lease Liabilities		$ (2,405,751)	$ (2,171,472)
Goodwill initially recorded		4,831,306	$ 4,463,531
2022 Acquisitions
Business Acquisition [Line Items]
Cash paid (gross of cash acquired)		756,003
Deferred purchase obligation, purchase price holdbacks and other		279,734
Total Consideration		1,035,737
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash		31,571
Accounts Receivable, Prepaid Expenses and Other Assets		73,351
Property, Plant and Equipment		7,893
Operating Lease Right-of-Use Assets		32,680
Accounts Payable, Accrued Expenses and Other Liabilities		(60,683)
Operating Lease Liabilities		(32,680)
Deferred Income Taxes		(142,019)
Total Fair Value of Identifiable Net Assets Acquired		448,835
Goodwill initially recorded		586,902
Proceeds from previous acquisition		219
Deferred purchase obligation, purchase price holdbacks and other, fair value		275,100
2022 Acquisitions | Customer Relationships
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Intangible assets		491,422
2022 Acquisitions | Other Intangible Assets
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Intangible assets		47,300
Other 2022 Acquisition
Business Acquisition [Line Items]
Deferred purchase obligation, purchase price holdbacks and other		$ 4,600
Total Consideration	$ 11,000
ITRenew
Business Acquisition [Line Items]
Cash paid (gross of cash acquired)	748,846
Total Consideration	$ 725
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Acquired finite-lived intangible assets, weighted average useful life		11 years

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Investments (Details) ₨ in Thousands, $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 INR (₨)	Aug. 31, 2022 USD ($)	Aug. 31, 2022 INR (₨)	Dec. 31, 2021	Apr. 30, 2021 USD ($)	Apr. 30, 2021 INR (₨)
Schedule of Equity Method Investments [Line Items]
Equity in Other Comprehensive (Loss) Income of Subsidiaries		$ 35,821	$ 0
Web Werks JV
Schedule of Equity Method Investments [Line Items]
Equity method investments, fair value disclosure					$ 46,100	₨ 3,750,000		$ 50,100	₨ 3,750
Additional equity method investments, fair value disclosure | ₨				₨ 7,500
MakeSpace JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage	49.99%			0.00%			49.99%
Equity in Other Comprehensive (Loss) Income of Subsidiaries	$ 35,800
Clutter JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage	27.00%			26.73%			0.00%

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Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Feb. 28, 2022	Dec. 31, 2021
Web Werks JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 97,877		$ 51,140
EQUITY INTEREST	55.40%		38.50%
Joint venture with AGC Equity Partners (the "Frankfurt JV")
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 27,004		$ 26,167
EQUITY INTEREST	20.00%		20.00%
MakeSpace JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 0		$ 30,154
EQUITY INTEREST	0.00%	49.99%	49.99%
Clutter JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 57,113		$ 0
EQUITY INTEREST	26.73%	27.00%	0.00%

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Derivative Instruments and Hedging Activities - Additional Information (Details) € in Thousands, $ in Thousands	Sep. 30, 2022 USD ($)	May 31, 2022 USD ($)	May 31, 2022 EUR (€)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 EUR (€)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 EUR (€)
March 2024 Interest Rate Swap Agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 350,000
Cross-currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount		$ 359,200	€ 340,500	$ 359,200	€ 300,000	$ 110,000	€ 99,055
Interest rate (as a percent)		4.50%	4.50%	4.50%	4.50%	6.00%	6.00%
Weighted average interest rate (as a percent)		1.20%	1.20%	3.40%	3.40%	3.65%	3.65%

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Derivative Instruments and Hedging Activities - Net Investment Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets					$ 11,021
Prepaid Expenses And Other
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 12,938		$ 12,938
Other Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	72,949		72,949
Accrued Expenses And Other Current Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities					(2,082)
Other Long-Term Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities					(6,262)
Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative net gain in cross-currency swaps	73,008		73,008
March 2024 Interest Rate Swap Agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative net gain in AOCI	12,879		12,879
March 2024 Interest Rate Swap Agreements | Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	12,879		12,879
Derivative liabilities					(7,680)
March 2024 Interest Rate Swap Agreements | Designated as Hedging Instrument | Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with interest rate swap agreements	5,157	$ 1,950	20,559	$ 7,946
August 2023 Cross-Currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	12,938		12,938
Derivative liabilities					(664)
August 2023 Cross-Currency Swap Agreements | Designated as Hedging Instrument | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with cross-currency swaps	6,771	2,655	13,602	5,933
February 2026 Cross-Currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	60,070		60,070		$ 11,021
February 2026 Cross-Currency Swap Agreements | Designated as Hedging Instrument | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with cross-currency swaps	$ 20,305	$ 10,060	$ 49,049	$ 21,626

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Debt - Schedule of Long Term Debt (Details) $ in Thousands, $ in Thousands	Sep. 30, 2022 USD ($)	Sep. 30, 2022 AUD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	$ 10,395,281		$ 9,364,451
UNAMORTIZED DEFERRED FINANCING COSTS	(85,160)		(92,510)
CARRYING AMOUNT	10,310,121		9,271,941
Long-term debt, gross, current maturities	(81,275)		(310,084)
Long term debt, gross, net of current portion	10,314,006		9,054,367
Unamortized deferred financing costs, current	0		656
Unamortized deferred financing costs, noncurrent	(85,160)		(91,854)
Carrying amount, current maturities	(81,275)		(309,428)
Carrying amount, excluding current maturities	10,228,846		8,962,513
Australian Dollar Term Loan
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	193,140	$ 302,041	223,182
UNAMORTIZED DEFERRED FINANCING COSTS	(464)		(656)
CARRYING AMOUNT	192,676		222,526
FAIR VALUE	193,140		223,530
Real Estate Mortgages, Financing Lease Liabilities and Other
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	407,646		460,648
UNAMORTIZED DEFERRED FINANCING COSTS	(643)		(840)
CARRYING AMOUNT	407,003		459,808
FAIR VALUE	407,646		460,648
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	316,700		0
UNAMORTIZED DEFERRED FINANCING COSTS	(584)		(450)
CARRYING AMOUNT	316,116		(450)
FAIR VALUE	316,700		0
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	890,000		0
UNAMORTIZED DEFERRED FINANCING COSTS	(7,899)		(5,174)
CARRYING AMOUNT	882,101		(5,174)
FAIR VALUE	890,000		0
Term Loan A | Term Loan Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	243,750		203,125
UNAMORTIZED DEFERRED FINANCING COSTS	0		0
CARRYING AMOUNT	243,750		203,125
FAIR VALUE	243,750		203,125
Term Loan B | Term Loan Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	667,766		672,847
UNAMORTIZED DEFERRED FINANCING COSTS	(4,059)		(4,995)
CARRYING AMOUNT	663,707		667,852
FAIR VALUE	668,500		675,500
UK Bilateral Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	155,887		189,168
UNAMORTIZED DEFERRED FINANCING COSTS	(175)		(709)
CARRYING AMOUNT	155,712		188,459
FAIR VALUE	$ 155,887		189,168
37/8% GBP Senior Notes due 2025 (the "GBP Notes") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.875%	3.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 445,392		540,481
UNAMORTIZED DEFERRED FINANCING COSTS	(2,593)		(3,912)
CARRYING AMOUNT	442,799		536,569
FAIR VALUE	$ 392,373		542,508
47/8% Senior Notes due 2027 (the “47/8% Notes due 2027”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,000,000		1,000,000
UNAMORTIZED DEFERRED FINANCING COSTS	(7,110)		(8,176)
CARRYING AMOUNT	992,890		991,824
FAIR VALUE	$ 892,500		1,030,000
51/4% Senior Notes due 2028 (the “51/4% Notes due 2028”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
DEBT (INCLUSIVE OF DISCOUNT)	$ 825,000		825,000
UNAMORTIZED DEFERRED FINANCING COSTS	(6,495)		(7,380)
CARRYING AMOUNT	818,505		817,620
FAIR VALUE	$ 719,813		862,125
5% Senior Notes due 2028 (the “5% Notes due 2028”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.00%	5.00%
DEBT (INCLUSIVE OF DISCOUNT)	$ 500,000		500,000
UNAMORTIZED DEFERRED FINANCING COSTS	(4,220)		(4,763)
CARRYING AMOUNT	495,780		495,237
FAIR VALUE	$ 428,750		513,750
47/8% Senior Notes due 2029 (the “47/8% Notes due 2029”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,000,000		1,000,000
UNAMORTIZED DEFERRED FINANCING COSTS	(10,126)		(11,211)
CARRYING AMOUNT	989,874		988,789
FAIR VALUE	$ 815,000		1,022,500
51/4% Senior Notes due 2030 (the “51/4 Notes due 2030”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,300,000		1,300,000
UNAMORTIZED DEFERRED FINANCING COSTS	(11,783)		(12,911)
CARRYING AMOUNT	1,288,217		1,287,089
FAIR VALUE	$ 1,072,500		1,355,250
41/2% Senior Notes due 2031 (the “41/2% Notes”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.50%	4.50%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,100,000		1,100,000
UNAMORTIZED DEFERRED FINANCING COSTS	(10,471)		(11,404)
CARRYING AMOUNT	1,089,529		1,088,596
FAIR VALUE	$ 847,000		1,094,500
5% Senior Notes due 2032 (the "5% Notes due 2032") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.00%	5.00%
DEBT (INCLUSIVE OF DISCOUNT)	$ 750,000		750,000
UNAMORTIZED DEFERRED FINANCING COSTS	(12,827)		(13,782)
CARRYING AMOUNT	737,173		736,218
FAIR VALUE	$ 477,000		767,813
55/8% Senior Notes due 2032 (the "55/8% Notes") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.625%	5.625%
DEBT (INCLUSIVE OF DISCOUNT)	$ 600,000		600,000
UNAMORTIZED DEFERRED FINANCING COSTS	(5,711)		(6,147)
CARRYING AMOUNT	594,289		593,853
FAIR VALUE	$ 579,375		$ 637,500

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Debt - Credit Agreements (Details)	Sep. 30, 2022 USD ($)	Mar. 18, 2022 measurement	Mar. 17, 2022 USD ($) measurement	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Leveraged leases, adjusted covenant ratio | measurement		7.0	6.5
Outstanding borrowings	$ 10,395,281,000			$ 9,364,451,000
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	3,779,000
Remaining capacity	1,356,221,000
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	2,250,000,000		$ 1,750,000,000
Outstanding borrowings	$ 890,000,000			0
Average interest rate (as a percent)	4.70%
Term Loan A | Term Loan Facility
Debt Instrument [Line Items]
Principal amount	$ 250,000,000
Outstanding borrowings	$ 243,750,000			$ 203,125,000
Average interest rate (as a percent)	4.90%
Term B Loan Facility | Term Loan Facility
Debt Instrument [Line Items]
Principal amount	$ 700,000,000
Outstanding borrowings	$ 668,500,000
Average interest rate (as a percent)	4.20%

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Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands		12 Months Ended
	Mar. 18, 2022	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 AUD ($)
Debt Instrument [Line Items]
Outstanding borrowings		$ 9,364,451	$ 10,395,281
Australian Dollar Term Loan
Debt Instrument [Line Items]
Principal amount			350
Outstanding borrowings		$ 223,182	$ 193,140	$ 302,041
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.625%	3.875%
Effective interest rate (as a percent)			6.70%	6.70%

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Debt - UK Bilateral Revolving Credit Facility (Details) - UK Bilateral Revolving Credit Facility	Sep. 30, 2022 GBP (£)
Debt Instrument [Line Items]
Effective interest rate (as a percent)	4.20%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	£ 140,000
Additional borrowing capacity	£ 125,000,000

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Debt - Accounts Receivable Securitization Program Narrative (Details) - Accounts Receivable Securitization Program - USD ($)	Jun. 29, 2022	Sep. 30, 2022	Jun. 28, 2022
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 325,000,000	$ 316,700,000	$ 300,000,000
Debt instrument, basis spread on variable rate	0.10%
Effective interest rate (as a percent)		4.10%
Maximum
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.95%

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Debt - Cash Pooling (Details) $ in Thousands	Sep. 30, 2022 USD ($) cash_pool	Dec. 31, 2021 USD ($)
Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
QRS Cash Pool | Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
GROSS CASH POSITION	$ 590,127	$ 552,900
OUTSTANDING DEBIT BALANCES	(588,633)	(552,100)
NET CASH POSITION	$ 1,494	800
QRS Cash Pool | JP Morgan Chase Bank
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
QRS Cash Pool | JP Morgan Chase Bank | EMEA
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
GROSS CASH POSITION	$ 6,030	0
OUTSTANDING DEBIT BALANCES	(5,718)	0
NET CASH POSITION	$ 312	0
QRS Cash Pool | JP Morgan Chase Bank | APAC
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
GROSS CASH POSITION	$ 23,561	9,400
OUTSTANDING DEBIT BALANCES	(23,394)	(9,200)
NET CASH POSITION	$ 167	200
TRS Cash Pool | Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
GROSS CASH POSITION	$ 539,557	606,000
OUTSTANDING DEBIT BALANCES	(538,498)	(603,900)
NET CASH POSITION	$ 1,059	2,100
TRS Cash Pool | JP Morgan Chase Bank
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
TRS Cash Pool | JP Morgan Chase Bank | EMEA
Debt Instrument [Line Items]
GROSS CASH POSITION	$ 2,104	0
OUTSTANDING DEBIT BALANCES	(2,044)	0
NET CASH POSITION	60	0
TRS Cash Pool | JP Morgan Chase Bank | APAC
Debt Instrument [Line Items]
GROSS CASH POSITION	22,272	12,000
OUTSTANDING DEBIT BALANCES	(21,899)	(9,900)
NET CASH POSITION	$ 373	$ 2,100

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Debt - Letters of Credit (Details) - Credit Agreement $ in Thousands	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding	$ 37,221
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	$ 3,779

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Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Insurance settlement
Commitments and Contingencies
Reasonably possible additional losses	$ 24,000

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Stockholders' Equity Matters (Details) - USD ($) $ / shares in Units, $ in Thousands																3 Months Ended		9 Months Ended
	Nov. 03, 2022	Oct. 04, 2022	Aug. 04, 2022	Jul. 06, 2022	Apr. 28, 2022	Apr. 06, 2022	Feb. 24, 2022	Jan. 06, 2022	Nov. 04, 2021	Oct. 06, 2021	Aug. 05, 2021	Jul. 06, 2021	May 06, 2021	Apr. 06, 2021	Feb. 24, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Dividend per share (in dollars per share)			$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185
TOTAL AMOUNT				$ 179,781		$ 179,661		$ 179,132		$ 179,080		$ 179,026		$ 178,569		$ 181,385	$ 180,600	$ 543,605	$ 540,045
Subsequent Event
Debt Instrument [Line Items]
Dividend per share (in dollars per share)	$ 0.6185
TOTAL AMOUNT		$ 179,790

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Segment Information - Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,286,945	$ 1,130,148	$ 3,824,525	$ 3,331,944
Adjusted EBITDA	469,434	417,769	1,355,134	1,203,965
Global RIM Business
Segment Reporting Information [Line Items]
Revenues	1,091,102	997,843	3,210,469	2,971,085
Adjusted EBITDA	483,862	435,904	1,402,025	1,263,277
Global Data Center Business
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Adjusted EBITDA	42,660	35,097	126,944	98,961
Corporate and Other Business
Segment Reporting Information [Line Items]
Revenues	95,534	43,718	316,672	124,187
Adjusted EBITDA	$ (57,088)	$ (53,232)	$ (173,835)	$ (158,273)

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Segment Information - Reconciliation to of Net Income to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reconciliation to of Net Income to Adjusted EBITDA
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Interest expense, net	121,767	103,809	351,266	313,451
Provision (benefit) for income taxes	23,934	28,017	52,097	153,073
Depreciation and amortization	175,077	174,818	536,946	507,145
Acquisition and Integration Costs	5,554	1,138	38,093	3,415
Restructuring charges	3,382	50,432	3,382	129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)	(935)	(66,124)	(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)	(21,517)	(48,814)	(209,001)
Stock-based compensation expense	14,326	12,644	45,923	45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859	1,252	5,869	3,340
Adjusted EBITDA	$ 469,434	$ 417,769	$ 1,355,134	$ 1,203,965

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Segment Information - Revenues by Product and Service Lines by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,286,945	$ 1,130,148	$ 3,824,525	$ 3,331,944
GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	1,091,102	997,843	3,210,469	2,971,085
GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	95,534	43,718	316,672	124,187
Records Management
Segment Reporting Information [Line Items]
Revenues	865,144	797,512	2,554,729	2,376,850
Records Management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	829,357	767,059	2,450,903	2,285,000
Records Management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Records Management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	35,787	30,453	103,826	91,850
Data Management
Segment Reporting Information [Line Items]
Revenues	127,226	130,679	385,276	399,420
Data Management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	127,226	130,679	385,276	399,420
Data Management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Data Management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Information Destruction
Segment Reporting Information [Line Items]
Revenues	194,266	113,370	587,136	319,002
Information Destruction | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	134,519	100,105	374,290	286,665
Information Destruction | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Information Destruction | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	59,747	13,265	212,846	32,337
Data Center
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Data Center | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Data Center | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Data Center | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

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Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Frankfurt JV
Related Party Transaction [Line Items]
Revenue	$ 700	$ 1,200	$ 13,500	$ 3,100
Makespace And Clutter
Related Party Transaction [Line Items]
Revenue	$ 6,900	$ 9,300	$ 21,300	$ 24,900

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Restructuring Charges (Details) - USD ($)	3 Months Ended		9 Months Ended		27 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,382,000	$ 50,432,000	$ 3,382,000	$ 129,686,000
Project Matterhorn
Restructuring Cost and Reserve [Line Items]
Expected cost	150,000,000		150,000,000
Project Summit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	50,432,000	$ 0	129,686,000	$ 450,000,000
Project Summit costs | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		6,797,000		14,526,000
Project Summit costs | Accrued Professional Fees
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 43,635,000		$ 115,160,000