IRON MOUNTAIN INC (Form: 10-Q, Received: 04/26/2018 17:02:29)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q



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

For the Quarterly Period Ended March 31, 2018

OR

o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Transition Period from to

Commission file number 1-13045

IRON MOUNTAIN INCORPORATED

(Exact Name of Registrant as Specified in Its Charter)



Delaware (State or other Jurisdiction of Incorporation or Organization)	23-2588479 (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)

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 ý No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files). Yes ý No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer", "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):



Large accelerated filer ý	Accelerated filer o	Non-accelerated filer o (Do not check if a smaller reporting company)	Smaller reporting company o	Emerging growth company o

If 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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No ý

Number of shares of the registrant's Common Stock outstanding at April 20, 2018 : 285,923,945

Table of Contents

IRON MOUNTAIN INCORPORATED

Index



	Page
PART I—FINANCIAL INFORMATION
Item 1—Unaudited Condensed Consolidated Financial Statements	3

Condensed Consolidated Balance Sheets at December 31, 2017 and March 31, 2018 (Unaudited)	3

Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2017 and 2018 (Unaudited)	4

Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three Months Ended March 31, 2017 and 2018 (Unaudited)	5

Condensed Consolidated Statements of Equity for the Three Months Ended March 31, 2017 and 2018 (Unaudited)	6

Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2017 and 2018 (Unaudited)	7

Notes to Condensed Consolidated Financial Statements (Unaudited)	8

Item 2—Management's Discussion and Analysis of Financial Condition and Results of Operations	51

Item 4—Controls and Procedures	82

PART II—OTHER INFORMATION

Item 2—Unregistered Sales of Equity Securities and Use of Proceeds	83

Item 6—Exhibits	83

Signatures	85

Table of Contents

Part I. Financial Information

Item 1. Unaudited Condensed Consolidated Financial Statements

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(In Thousands, except Share and Per Share Data)

(Unaudited)



	December 31, 2017			March 31, 2018
ASSETS
Current Assets:
Cash and cash equivalents	$	925,699		$	442,491
Accounts receivable (less allowances of $46,648 and $49,512 as of December 31, 2017 and March 31, 2018, respectively)	835,742			859,106
Prepaid expenses and other	188,874			223,276
Total Current Assets	1,950,315			1,524,873
Property, Plant and Equipment:
Property, plant and equipment	6,251,100			7,306,059
Less—Accumulated depreciation	(2,833,421		)	(2,940,588		)
Property, Plant and Equipment, Net	3,417,679			4,365,471
Other Assets, Net:
Goodwill	4,070,267			4,325,478
Customer relationships, customer inducements and data center lease-based intangibles	1,400,547			1,592,488
Other	133,594			189,839
Total Other Assets, Net	5,604,408			6,107,805
Total Assets	$	10,972,402		$	11,998,149
LIABILITIES AND EQUITY
Current Liabilities:
Current portion of long-term debt	$	146,300		$	137,198
Accounts payable	289,137			251,214
Accrued expenses	653,146			574,725
Deferred revenue	241,590			267,925
Total Current Liabilities	1,330,173			1,231,062
Long-term Debt, net of current portion	6,896,971			8,020,873
Other Long-term Liabilities	73,039			96,731
Deferred Rent	126,231			125,442
Deferred Income Taxes	155,728			169,889
Commitments and Contingencies (see Note 8)
Redeemable Noncontrolling Interests	91,418			92,877
Equity:
Iron Mountain Incorporated Stockholders' 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 283,110,183 shares and 285,923,405 shares as of December 31, 2017 and March 31, 2018, respectively)	2,831			2,859
Additional paid-in capital	4,164,562			4,250,757
(Distributions in excess of earnings) Earnings in excess of distributions	(1,765,966		)	(1,919,787		)
Accumulated other comprehensive items, net	(103,989		)	(74,082		)
Total Iron Mountain Incorporated Stockholders' Equity	2,297,438			2,259,747
Noncontrolling Interests	1,404			1,528
Total Equity	2,298,842			2,261,275
Total Liabilities and Equity	$	10,972,402		$	11,998,149

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

Table of Contents

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In Thousands, except Per Share Data)

(Unaudited)



	Three Months Ended March 31,
	2017			2018
Revenues:
Storage rental	$	572,279		$	651,149
Service	366,597			391,309
Total Revenues	938,876			1,042,458
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	426,707			448,721
Selling, general and administrative	240,166			269,730
Depreciation and amortization	124,707			160,578
(Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net	(459		)	(1,130		)
Total Operating Expenses	791,121			877,899
Operating Income (Loss)	147,755			164,559
Interest Expense, Net (includes Interest Income of $2,293 and $1,386 for the three months ended March 31, 2017 and 2018, respectively)	86,055			97,626
Other (Income) Expense, Net	(6,364		)	20,151
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes	68,064			46,782
Provision (Benefit) for Income Taxes	9,220			1,168
Income (Loss) from Continuing Operations	58,844			45,614
(Loss) Income from Discontinued Operations, Net of Tax	(337		)	(462		)
Net Income (Loss)	58,507			45,152
Less: Net Income (Loss) Attributable to Noncontrolling Interests	382			468
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	58,125		$	44,684
Earnings (Losses) per Share—Basic:
Income (Loss) from Continuing Operations	$	0.22		$	0.16
Total Income (Loss) from Discontinued Operations, Net of Tax	$	—		$	—
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	0.22		$	0.16
Earnings (Losses) per Share—Diluted:
Income (Loss) from Continuing Operations	$	0.22		$	0.16
Total Income (Loss) from Discontinued Operations, Net of Tax	$	—		$	—
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	0.22		$	0.16
Weighted Average Common Shares Outstanding—Basic	263,855			285,259
Weighted Average Common Shares Outstanding—Diluted	264,810			285,993
Dividends Declared per Common Share	$	0.5504		$	0.5888

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

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IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(In Thousands)

(Unaudited)



	Three Months Ended March 31,
	2017			2018
Net Income (Loss)	$	58,507		$	45,152
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustments	50,784			31,651
Change in Fair Value of Interest Rate Swap Agreements	—			(185		)
Total Other Comprehensive Income (Loss)	50,784			31,466
Comprehensive Income (Loss)	109,291			76,618
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(168		)	2,027
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$	109,459		$	74,591

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

Table of Contents

IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(In Thousands, except Share Data)

(Unaudited)



				Iron Mountain Incorporated Stockholders' Equity
				Common Stock			Additional Paid-in Capital			(Distributions in Excess of Earnings) Earnings in Excess of Distributions						Noncontrolling Interests
	Total			Shares	Amounts		Additional Paid-in Capital						Accumulated Other Comprehensive Items, Net			Noncontrolling Interests			Redeemable Noncontrolling Interests
Balance, December 31, 2016	$	1,936,671		263,682,670	$	2,636	$	3,489,795		$	(1,343,311	)	$	(212,573	)	$	124		$	54,697
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	2,453			427,718	5		2,448			—			—			—			—
Change in value of redeemable noncontrolling interests	(307		)	—	—		(307		)	—			—			—			307
Parent cash dividends declared	(145,427		)	—	—		—			(145,427		)	—			—			—
Foreign currency translation adjustment	51,405			—	—		—			—			51,334			71			(621		)
Net income (loss)	58,350			—	—		—			58,125			—			225			157
Noncontrolling interests equity contributions	—			—	—		—			—			—			—			13,230
Noncontrolling interests dividends	(214		)	—	—		—			—			—			(214		)	(462		)
Purchase of noncontrolling interests	843			—	—		—			—			—			843			—
Balance, March 31, 2017	$	1,903,774		264,110,388	$	2,641	$	3,491,936		$	(1,430,613	)	$	(161,239	)	$	1,049		$	67,308



				Iron Mountain Incorporated Stockholders' Equity
				Common Stock			Additional Paid-in Capital			(Distributions in Excess of Earnings) Earnings in Excess of Distributions						Noncontrolling Interests
	Total			Shares	Amounts		Additional Paid-in Capital						Accumulated Other Comprehensive Items, Net			Noncontrolling Interests			Redeemable Noncontrolling Interests
Balance, December 31, 2017	$	2,298,842		283,110,183	$	2,831	$	4,164,562		$	(1,765,966	)	$	(103,989	)	$	1,404		$	91,418
Cumulative-effect adjustment for adoption of ASU 2014-09 (see Note 2.d.)	(29,461		)	—	—		—			(29,461		)	—			—			—
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	1,432			364,736	4		1,428			—			—			—			—
Issuance of shares associated with the Over-Allotment Option, net of underwriting discounts and offering expenses (see Note 9)	76,192			2,175,000	22		76,170			—			—			—			—
Issuance of shares through the At the Market (ATM) Equity Program, net of underwriting discounts and offering expenses (see Note 9)	8,716			273,486	2		8,714			—			—			—			—
Change in value of redeemable noncontrolling interests	(117		)	—	—		(117		)	—			—			—			117
Parent cash dividends declared	(169,044		)	—	—		—			(169,044		)	—			—			—
Foreign currency translation adjustment	30,246			—	—		—			—			30,092			154			1,405
Change in fair value of interest rate swap agreements	(185		)	—	—		—			—			(185		)	—
Net income (loss)	44,654			—	—		—			44,684			—			(30		)	498
Noncontrolling interests dividends	—			—	—		—			—			—			—			(561		)
Balance, March 31, 2018	$	2,261,275		285,923,405	$	2,859	$	4,250,757		$	(1,919,787	)	$	(74,082	)	$	1,528		$	92,877

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

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IRON MOUNTAIN INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In Thousands)

(Unaudited)



	Three Months Ended March 31,
	2017			2018
Cash Flows from Operating Activities:
Net income (loss)	$	58,507		$	45,152
Loss (Income) from discontinued operations	337			462
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	99,592			113,432
Amortization (includes amortization of deferred financing costs and discount of $3,907 and $3,553 for the three months ended March 31, 2017 and 2018, respectively)	29,022			50,699
Revenue reduction associated with amortization of permanent withdrawal fees and above- and below-market leases (see Note 2.c.)	3,158			3,664
Stock-based compensation expense	6,549			7,384
(Benefit) Provision for deferred income taxes	(7,386		)	(387		)
(Gain) Loss on disposal/write-down of property, plant and equipment, net (including real estate)	(459		)	(1,130		)
Foreign currency transactions and other, net	(786		)	23,530
Changes in Assets and Liabilities (exclusive of acquisitions):
Accounts receivable	(8,971		)	(10,590		)
Prepaid expenses and other	(24,826		)	(56,937		)
Accounts payable	5,869			(1,381		)
Accrued expenses and deferred revenue	(36,112		)	(76,324		)
Other assets and long-term liabilities	(2,320		)	(6,006		)
Cash Flows from Operating Activities - Continuing Operations	122,174			91,568
Cash Flows from Operating Activities - Discontinued Operations	(337		)	—
Cash Flows from Operating Activities	121,837			91,568
Cash Flows from Investing Activities:
Capital expenditures	(73,202		)	(95,605		)
Cash paid for acquisitions, net of cash acquired	(12,187		)	(1,428,974		)
Acquisition of customer relationships	(17,132		)	(12,602		)
Customer inducements (see Note 2.c.)	(4,271		)	(130		)
Contract fulfillment costs (see Note 2.d.)	—			(5,314		)
Net proceeds from Divestments	2,423			—
Proceeds from sales of property and equipment and other, net (including real estate)	66			(19,387		)
Cash Flows from Investing Activities - Continuing Operations	(104,303		)	(1,562,012		)
Cash Flows from Investing Activities - Discontinued Operations	—			—
Cash Flows from Investing Activities	(104,303		)	(1,562,012		)
Cash Flows from Financing Activities:
Repayment of revolving credit, term loan and bridge facilities and other debt	(2,682,348		)	(4,410,656		)
Proceeds from revolving credit, term loan and bridge facilities and other debt	2,714,783			5,496,491
Debt financing and equity contribution from noncontrolling interests	13,230			—
Debt repayment and equity distribution to noncontrolling interests	(2,562		)	(561		)
Parent cash dividends	(2,060		)	(169,006		)
Net proceeds associated with the Over-Allotment Option (see Note 9)	—			76,192
Net proceeds associated with the At the Market (ATM) Program	—			8,716
Net (payments) proceeds associated with employee stock-based awards	(4,308		)	(5,950		)
Payment of debt financing and stock issuance costs	(73		)	(9,974		)
Cash Flows from Financing Activities - Continuing Operations	36,662			985,252
Cash Flows from Financing Activities - Discontinued Operations	—			—
Cash Flows from Financing Activities	36,662			985,252
Effect of Exchange Rates on Cash and Cash Equivalents	4,948			1,984
Increase (Decrease) in Cash and Cash Equivalents	59,144			(483,208		)
Cash and Cash Equivalents, including Restricted Cash, Beginning of Period	236,484			925,699
Cash and Cash Equivalents, including Restricted Cash, End of Period	$	295,628		$	442,491
Supplemental Information:
Cash Paid for Interest	$	99,022		$	122,027
Cash Paid for Income Taxes, Net	$	30,422		$	22,292
Non-Cash Investing and Financing Activities:
Capital Leases	$	24,395		$	13,877
Accrued Capital Expenditures	$	63,655		$	36,760
Accrued Purchase Price and Other Holdbacks	$	—		$	149
Decrease in Fair Value of OSG Investment	$	—		$	87
Dividends Payable	$	148,992		$	172,140

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

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(1) General

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. Iron Mountain Incorporated, a Delaware corporation ("IMI"), and its subsidiaries ("we" or "us") store records, primarily physical records and data backup media, provide colocation and wholesale data center spaces and provide information management and data center solutions that help organizations in various locations throughout North America, Europe, Latin America, Asia and Africa protect their information, lower storage rental costs, comply with regulations, facilitate corporate disaster recovery, and better use their information and information technology ("IT") infrastructure for business advantages, regardless of its format, location or life cycle stage. We currently serve customers across an array of market verticals - commercial, legal, financial, healthcare, insurance, life sciences, energy, business services, entertainment and government organizations.

The unaudited condensed consolidated financial statements 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 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, 2017 included in our Annual Report on Form 10-K filed with the SEC on February 16, 2018 (our "Annual 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.

On January 1, 2018, we adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"). See Note 2.d.

On January 10, 2018, we completed the acquisition of IO Data Centers, LLC ("IODC"). See Note 4.

(2) Summary of Significant Accounting Policies

This Note 2 to Notes to Condensed Consolidated Financial Statements provides information and disclosure regarding certain of our significant accounting policies and should be read in conjunction with Note 2 to Notes to Consolidated Financial Statements included in our Annual Report, which may provide additional information with regard to the accounting policies set forth herein and other of our significant accounting policies.

a. Cash, Cash Equivalents and Restricted Cash

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.

At December 31, 2017 and March 31, 2018, we had approximately $22,167 and $18,360 , respectively, of restricted cash held by certain financial institutions related to bank guarantees.

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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)

b. Foreign Currency

Local currencies are the functional currencies for our operations outside the United States, with the exception of certain foreign holding companies and our financing centers in Europe, whose functional currency is the United States dollar. In those instances where the local currency is the functional currency, assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated at average exchange rates for the applicable period. Resulting translation adjustments are reflected in the accumulated other comprehensive items, net component of Iron Mountain Incorporated Stockholders' Equity. The gain or loss on foreign currency transactions, calculated as the difference between the historical exchange rate and the exchange rate at the applicable measurement date, including those related to (i) borrowings in certain foreign currencies under our Former Revolving Credit Facility and Revolving Credit Facility (both as defined and discussed more fully in Note 5), (ii) our Euro Notes (as defined and discussed more fully in Note 5), and (iii) certain foreign currency denominated intercompany obligations of our foreign subsidiaries to us and between our foreign subsidiaries, which are not considered permanently invested, are included in Other (income) expense, net, in the accompanying Condensed Consolidated Statements of Operations.

Total (gain) loss on foreign currency transactions for the three months ended March 31, 2017 and 2018 is as follows:



	Three Months Ended March 31,
	2017			2018
Total (gain) loss on foreign currency transactions	$	(4,164	)	$	21,785

c. Goodwill and Other Intangible Assets and Liabilities

Goodwill

Goodwill is not amortized but is reviewed annually for impairment, or more frequently if impairment indicators arise. We have selected October 1 as our annual goodwill impairment review date. We performed our most recent annual goodwill impairment review as of October 1, 2017 and as a result of that review, we determined that the fair value of the Consumer Storage reporting unit was less than its carrying value and, therefore, we recorded a $3,011 impairment charge on the goodwill associated with this reporting unit during the fourth quarter of 2017, which represents a write-off of all goodwill associated with this reporting unit. As of December 31, 2017 and March 31, 2018, no factors were identified that would alter our October 1, 2017 goodwill impairment analysis. In making this assessment, we considered a number of factors including operating results, business plans, anticipated future cash flows, transactions and marketplace data. There are inherent uncertainties related to these factors and our judgment in applying them to the analysis of goodwill impairment. When changes occur in the composition of one or more reporting units, the goodwill is reassigned to the reporting units affected based on their relative fair values.

Our reporting units as of December 31, 2017 are described in detail in Note 2.h. to Notes to Consolidated Financial Statements included in our Annual Report. The goodwill associated with acquisitions completed during the first three months of 2018 (which are described in Note 4) has been incorporated into our reporting units as they existed as of December 31, 2017.

During the first quarter of 2018, as a result of changes in the management of our businesses included in our Other International Business segment, we reassessed the composition of our reporting units. As a result of this reassessment, we determined that our business in South Africa, which was previously being managed in conjunction with our businesses in Northern and Eastern Europe and Middle East and India as a part of our former Northern and Eastern Europe and Middle East, Africa and India (“NEE and MEAI”) reporting unit, was now being managed in conjunction with our businesses included in our Australia and New Zealand reporting unit. This newly formed reporting unit, which consists of (i) the businesses included in our former Australia and New Zealand reporting unit and (ii) our business in South Africa is referred to as the Australia, New Zealand and South Africa (“ANZ-SA”) reporting unit. The former NEE and MEAI reporting unit is now referred to as the Northern and Eastern Europe and Middle East and India ("NEE and MEI") reporting unit.

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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)

The changes in the carrying value of goodwill attributable to each reportable operating segment for the three months ended March 31, 2018 are as follows:



	North American Records and Information Management Business			North American Data Management Business			Western European Business		Other International Business		Global Data Center Business		Corporate and Other Business		Total Consolidated
Gross Balance as of December 31, 2017	$	2,474,829		$	551,726		$	453,537	$	846,721	$	—	$	60,048	$	4,386,861
Non-deductible goodwill acquired during the year	—			—			—		—		229,539		—		229,539
Fair value and other adjustments(1)	122			—			—		5,886		—		4,704		10,712
Currency effects	(5,593		)	(1,528		)	13,885		7,713		—		621		15,098
Gross Balance as of March 31, 2018	$	2,469,358		$	550,198		$	467,422	$	860,320	$	229,539	$	65,373	$	4,642,210
Accumulated Amortization Balance as of December 31, 2017	$	205,383		$	53,875		$	57,048	$	288	$	—	$	—	$	316,594
Currency effects	(198		)	(50		)	376		10		—		—		138
Accumulated Amortization Balance as of March 31, 2018	$	205,185		$	53,825		$	57,424	$	298	$	—	$	—	$	316,732
Net Balance as of December 31, 2017	$	2,269,446		$	497,851		$	396,489	$	846,433	$	—	$	60,048	$	4,070,267
Net Balance as of March 31, 2018	$	2,264,173		$	496,373		$	409,998	$	860,022	$	229,539	$	65,373	$	4,325,478
Accumulated Goodwill Impairment Balance as of December 31, 2017	$	85,909		$	—		$	46,500	$	—	$	—	$	3,011	$	135,420
Accumulated Goodwill Impairment Balance as of March 31, 2018	$	85,909		$	—		$	46,500	$	—	$	—	$	3,011	$	135,420

_______________________________________________________________________________


(1)	Total fair value and other adjustments include $10,712 in net adjustments primarily related to property, plant and equipment, customer relationship intangible assets and deferred income taxes and other liabilities.

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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)

Finite-lived intangible assets and liabilities

i. Customer Relationship Intangible Assets

Customer relationship intangible assets, which are acquired through either business combinations or acquisitions of customer relationships, are amortized over periods ranging from 10 to 30 years and are included in depreciation and amortization in the accompanying Condensed Consolidated Statements of Operations. The value of customer relationship intangible assets is calculated based upon estimates of their fair value utilizing an income approach based on the present value of expected future cash flows.

ii. Customer Inducements

Prior to the adoption of ASU 2014-09, free intake costs to transport boxes to one of our facilities, which include labor and transportation costs ("Free Move Costs"), were capitalized and amortized over periods ranging from 10 to 30 years. The amortization of Free Move Costs is included in depreciation and amortization in the accompanying Condensed Consolidated Statements of Operations for the three months ended March 31, 2017. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered a Contract Fulfillment Cost (as defined in Note 2.d.) and, therefore, are now deferred and amortized over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. See Note 2.d. for information regarding the accounting for Free Move Costs, which are now a component of Intake Costs (as defined in Note 2.d.), following the adoption of ASU 2014-09.

Payments that are made to a customer's current records management vendor in order to terminate the customer's existing contract with that vendor, or direct payments to a customer ("Permanent Withdrawal Fees"), are amortized over periods ranging from 5 to 15 years and are included in storage and service revenue in the accompanying Condensed Consolidated Statements of Operations. Our accounting for Permanent Withdrawl Fees did not change as a result of the adoption of ASU 2014-09.

Free Move Costs (prior to the adoption of ASU 2014-09) and Permanent Withdrawal Fees are collectively referred to as "Customer Inducements". If the customer terminates its relationship with us, the unamortized carrying value of the Customer Inducement intangible asset is charged to expense or revenue. However, in the event of such termination, we generally collect, and record as income, permanent removal fees that generally equal or exceed the amount of the unamortized Customer Inducement intangible asset.

Table of Contents

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)

iii. Data Center Intangible Assets and Liabilities

Finite-lived intangible assets associated with our data center business consist of the following:

Data Center In-Place Lease Intangible Assets and Data Center Tenant Relationship Intangible Assets

Data Center In-Place Lease Intangible Assets (“Data Center In-Place Leases”) and Data Center Tenant Relationship Intangible Assets (“Data Center Tenant Relationships") are acquired through either business combinations or asset acquisitions in our data center business. These intangible assets reflect the value associated with acquiring a data center operation with active tenants as of the date of acquisition. The value of Data Center In-Place Leases is determined based upon an estimate of the economic costs (such as lost revenues and unreimbursed operating expenses during the lease-up period, tenant improvement costs, commissions, legal expenses and other costs to acquire new data center leases) avoided by acquiring a data center operation with active tenants that would have otherwise been incurred if the data center operation was purchased vacant. Data Center In-Place Leases are amortized over the weighted average remaining term of the acquired data center leases and are included in depreciation and amortization in the accompanying Condensed Consolidated Statements of Operations. The value of Data Center Tenant Relationships is determined based upon an estimate of the economic costs avoided upon lease renewal of the acquired tenants, based upon expectations of lease renewal. Data Center Tenant Relationships are amortized over the weighted average remaining anticipated life of the relationship with the acquired tenant and are included in depreciation and amortization in the accompanying Condensed Consolidated Statements of Operations. Data Center In-Place Leases and Data Center Tenant Relationships are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Condensed Consolidated Balance Sheets.

Data Center Above-Market and Below-Market In-Place Lease Intangible Assets

Data Center Above-Market In-Place Lease Intangible Assets (“Data Center Above-Market Leases”) and Data Center Below-Market In-Place Lease Intangible Assets (“Data Center Below-Market Leases”) are acquired through either business combinations or asset acquisitions in our data center business. We record Data Center Above-Market Leases and Data Center Below-Market Leases at the net present value of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of the fair market lease rates for each corresponding in-place lease. Data Center Above-Market Leases and Data Center Below-Market Leases are amortized over the remaining non-cancellable term of the acquired in-place lease to storage revenue in the accompanying Condensed Consolidated Statements of Operations. Data Center Above-Market Leases are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Condensed Consolidated Balance Sheets. Data Center Below-Market Leases are included in Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheets.

Table of Contents

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)

The components of our finite-lived intangible assets related to customer relationship value, customer inducements and data center lease-based intangible assets and liabilities as of December 31, 2017 and March 31, 2018 are as follows:



	December 31, 2017							March 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Assets:
Customer relationship intangible assets	$	1,704,105	$	(395,278	)	$	1,308,827	$	1,728,685	$	(427,550	)	$	1,301,135
Customer inducements(1)	140,030		(66,981		)	73,049		57,502		(35,149		)	22,353
Data center lease-based intangible assets(2)	19,314		(643		)	18,671		282,609		(13,609		)	269,000
	$	1,863,449	$	(462,902	)	$	1,400,547	$	2,068,796	$	(476,308	)	$	1,592,488
Liabilities:
Data center below-market leases	$	—	$	—		$	—	$	11,421	$	(349	)	$	11,072

_______________________________________________________________________________

(1)

The gross carrying amount, accumulated amortization and net carrying amount of customer inducements as of December 31, 2017 includes Free Move Costs, which were capitalized as Customer Inducements prior to the adoption of ASU 2014-09. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered a Contract Fulfillment Cost. Contract Fulfillment Costs are included in Other, a component of Other Assets, Net, in the accompanying Condensed Consolidated Balance Sheet as of March 31, 2018. See Note 2.d. for information regarding Contract Fulfillment Costs included in our Condensed Consolidated Balance Sheet as of March 31, 2018.


(2)	Includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases.

Other finite-lived intangible assets, including trade names, noncompetition agreements and trademarks, are capitalized and amortized over a weighted average of four years and are included in depreciation and amortization in the accompanying Condensed Consolidated Statements of Operations for the three months ended March 31, 2017 and 2018. The other finite-lived intangible assets as of December 31, 2017 and March 31, 2018 are as follows:



	December 31, 2017							March 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Other finite-lived intangible assets (included in other assets, net)	$	20,929	$	(10,728	)	$	10,201	$	20,974	$	(11,936	)	$	9,038

Table of Contents

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)

Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Permanent Withdrawal Fees and net revenue reduction associated with the amortization of Data Center Above-Market Leases and Data Center Below-Market Leases for the three months ended March 31, 2017 and 2018 are as follows:



	Three Months Ended March 31,
	2017		2018
Amortization expense included in depreciation and amortization associated with:
Customer relationship intangible assets	$	20,133	$	26,337
Customer inducements	2,666		2,469
Data center in-place leases and tenant relationships	—		10,838
Other finite-lived intangible assets	2,316		1,185
Revenue reduction associated with amortization of:
Permanent withdrawal fees	$	3,158	$	2,585
Data center above-market leases and data center below-market leases	—		1,079

d. Revenues

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09. ASU 2014-09 provides guidance for management to reassess revenue recognition as it relates to: (1) transfer of control, (2) variable consideration, (3) allocation of transaction price based on relative standalone selling price, (4) licenses, (5) time value of money, and (6) contract costs. We adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective method for all of our customer contracts, whereby the cumulative effect of applying ASU 2014-09 is recognized at the date of initial application. At January 1, 2018, we recognized the cumulative effect of initially applying ASU 2014-09 as an adjustment to the opening balance of (distributions in excess of earnings) earnings in excess of distributions, resulting in a decrease of $29,461 to stockholders' equity. The reduction of (distribution in excess of earnings) earnings in excess of distributions represents the net effect of (i) the write off of Free Move Costs, net (which were capitalized and amortized prior to the adoption of ASU 2014-09) based upon the net book value of the Free Move Costs as of December 31, 2017, (ii) the recognition of certain Contract Fulfillment Assets, specifically Intake Costs (each as defined below) and commission assets, (iii) the recognition of deferred revenue associated with Intake Costs billed to our customers (as discussed below), and (iv) the deferred income tax impact of the aforementioned items. As we adopted ASU 2014-09 on a modified retrospective basis, the comparative Condensed Consolidated Balance Sheet as of December 31, 2017, and the Condensed Consolidated Statement of Operations, the Condensed Consolidated Statement of Comprehensive Income (Loss), the Condensed Consolidated Statement of Equity and the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2017 have not been restated to reflect the adoption of ASU 2014-09 and reflect our revenue policies in place at that time, as disclosed in Note 2.l. to Notes to Consolidated Financial Statements included in our Annual Report.

Storage rental and service revenues are recognized in the month the respective storage rental or service is provided, and customers are generally billed on a monthly basis on contractually agreed-upon terms. The performance obligation is a series of distinct services (as determined for purposes of ASU 2014-09, a “series”) that have the same pattern of transfer to the customer that is satisfied over time. For those contracts that qualify as a series, we have a right to consideration from the customer in an amount that corresponds directly with the value of the underlying performance obligation transferred to the customer to date. This concept is known as "right to invoice" and we are applying the "right to invoice" practical expedient to all revenues, with the exception of storage revenues in our data center business.

Table of Contents

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)

For all of our businesses, with the exception of the storage component of our data center business, each purchasing decision is fully in the control of the customer and, therefore, consideration beyond the current reporting period is variable and allocated to the specific period, which is consistent with the practical expedient above. Our data center business features storage rental provided to the customer at contractually specified rates over a fixed contractual period. The storage rental revenue related to the storage component of our data center business is recognized on a straight-line basis over the contract term. The revenue related to the service component of our data center business is recognized in the period the data center access or related services are provided. Total data center revenues represent less than 5% of our total consolidated revenues at March 31, 2018.

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 (“Contract Fulfillment Costs”). The following describes each of these Contract Fulfillment Costs recognized under ASC 2014-09:

Intake Costs (and associated deferred revenue)

Prior to the adoption of ASU 2014-09, intake costs incurred but not charged to a customer to transport records to our facilities (or Free Move Costs, as described in Note 2.c.), which include labor and transportation costs, were capitalized and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations. The initial movement of customer records into physical storage must take place prior to initiation of the storage of records and is not considered a separate performance obligation and, therefore, the costs of the initial intake of customer records into physical storage (“Intake Costs”) represent a contract fulfillment cost for the storage of records as the earnings process does not commence until a customer’s records or other assets are in our possession. Accordingly, upon the adoption of ASU 2014-09, all Intake Costs, regardless of whether or not the services associated with such initial moves are billed to the customer or are provided to the customer at no charge, will be deferred and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. Similarly, in instances where such Intake Costs are billed to the customer, the associated revenue will be deferred and recognized over the same three year period.

Commissions

Prior to the adoption of ASU 2014-09, commissions we paid related to our long-term storage contracts were expensed as incurred. Upon the adoption of ASU 2014-09, certain commission payments that are directly associated with the fulfillment of long-term storage contracts are capitalized and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. Certain direct commission payments associated with contracts with a duration of one year or less are expensed as incurred under the practical expedient which allows an entity to expense as incurred an incremental cost of obtaining a contract if the amortization period of the asset that the entity otherwise would have recognized is one year or less.

The Contract Fulfillment Assets recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and March 31, 2018 are as follows:



		January 1, 2018 (Date of Adoption of ASU 2014-09)							March 31, 2018
Description	Location in Balance Sheet	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Commissions asset	Other (within Other Assets, Net)	$	42,072	$	(21,173	)	$	20,899	$	44,729	$	(24,781	)	$	19,948
Intake Costs asset	Other (within Other Assets, Net)	31,604		(14,954		)	16,650		34,408		(17,875		)	16,533

Table of Contents

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)

Amortization expense associated with the commissions asset and Intake Costs asset was $3,587 and $2,730 , respectively, for the three months ended March 31, 2018.

Deferred revenue liabilities, associated with billed Intake Costs, recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and March 31, 2018 are as follows:



Description	Location in Balance Sheet	January 1, 2018 (Date of Adoption of ASU 2014-09)		March 31, 2018
Deferred revenue - Current	Deferred revenue	$	9,953	$	10,482
Deferred revenue - Long-term	Other Long-term Liabilities	9,453		9,639

The following table presents certain components of our Condensed Consolidated Statements of Operations as of March 31, 2018 as reported and if we had not adopted ASU 2014-09 on January 1, 2018:



	Three Months Ended March 31, 2018 (As Reported)		Three Months Ended March 31, 2018 (If ASU 2014-09 was not adopted)
Revenues	$	1,042,458	$	1,041,264
Operating Income	$	164,559	$	165,319
Income from Continuing Operations	$	45,614	$	46,374

Per Share Income from Continuing Operations - Basic	$	0.16	$	0.16
Per Share Income from Continuing Operations - Diluted	$	0.16	$	0.16

e. Stock-Based Compensation

We record stock-based compensation expense, utilizing the straight-line method, for 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, "Employee Stock-Based Awards").

Stock-based compensation expense for Employee Stock-Based Awards for the three months ended March 31, 2017 and 2018 was $6,549 ( $5,777 after tax or $0.02 per basic and diluted share) and $7,384 ( $6,833 after tax or $0.02 per basic and diluted share), respectively.

Stock-based compensation expense for Employee Stock-Based Awards included in the accompanying Condensed Consolidated Statements of Operations is as follows:



	Three Months Ended March 31,
	2017		2018
Cost of sales (excluding depreciation and amortization)	$	28	$	29
Selling, general and administrative expenses	6,521		7,355
Total stock-based compensation	$	6,549	$	7,384

Table of Contents

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)

Stock Options

A summary of our stock options outstanding as of March 31, 2018 by vesting terms is as follows:



	March 31, 2018
	Stock Options Outstanding	% of Stock Options Outstanding
Three-year vesting period (10 year contractual life)	4,111,684	91.8	%
Five-year vesting period (10 year contractual life)	366,855	8.2	%
	4,478,539	100.0	%

The weighted average fair value of stock options granted for the three months ended March 31, 2017 and 2018 was $4.26 and $3.50 per share, respectively. These values were estimated on the date of grant using the Black-Scholes option pricing model. The weighted average assumptions used for grants in the respective periods are as follows:



	Three Months Ended March 31,
Weighted Average Assumptions	2017		2018
Expected volatility	25.8	%	25.4	%
Risk-free interest rate	1.96	%	2.65	%
Expected dividend yield	6	%	7	%
Expected life	5.0 years		5.0 years

Expected volatility is calculated utilizing daily historical volatility over a period that equates to the expected life of the option. The risk-free interest rate was based on the United States Treasury interest rates whose term is consistent with the expected life (estimated period of time outstanding) of the stock options. Expected dividend yield is considered in the option pricing model and represents our current annualized expected per share dividends over the current trade price of our common stock. The expected life of the stock options granted is estimated using the historical exercise behavior of employees.

A summary of stock option activity for the three months ended March 31, 2018 is as follows:



	Stock Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Average Intrinsic Value
Outstanding at December 31, 2017	3,671,740		$	34.41
Granted	839,437		33.72
Exercised	(20,223	)	19.41
Forfeited	(9,673	)	35.12
Expired	(2,742	)	37.71
Outstanding at March 31, 2018	4,478,539		$	34.34	7.58	$	8,201
Options exercisable at March 31, 2018	2,498,039		$	33.73	6.39	$	7,815
Options expected to vest	1,831,809		$	35.12	9.08	$	367

Table of Contents

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)

The aggregate intrinsic value of stock options exercised for the three months ended March 31, 2017 and 2018 is as follows:



	Three Months Ended March 31,
	2017		2018
Aggregate intrinsic value of stock options exercised	$	1,912	$	393

Restricted Stock Units

Under our various equity compensation plans, we may also grant RSUs. Our RSUs generally have a vesting period of three years from the date of grant. However, RSUs granted to our non-employee directors vest immediately upon grant.

All RSUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of RSUs in cash upon the vesting date of the associated RSU and will be forfeited if the RSU does not vest. The fair value of RSUs is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero).

Cash dividends accrued and paid on RSUs for the three months ended March 31, 2017 and 2018 are as follows:



	Three Months Ended March 31,
	2017		2018
Cash dividends accrued on RSUs	$	683	$	721
Cash dividends paid on RSUs	1,855		2,043

The fair value of RSUs vested during the three months ended March 31, 2017 and 2018 is as follows:



	Three Months Ended March 31,
	2017		2018
Fair value of RSUs vested	$	14,026	$	15,330

A summary of RSU activity for the three months ended March 31, 2018 is as follows:



	RSUs		Weighted- Average Grant-Date Fair Value
Non-vested at December 31, 2017	1,071,469		$	35.38
Granted	611,030		33.58
Vested	(436,489	)	35.12
Forfeited	(24,035	)	36.43
Non-vested at March 31, 2018	1,221,975		$	34.55

Table of Contents

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)

Performance Units

Under our various equity compensation plans, we may also make awards of PUs. For the majority of outstanding PUs, the number of PUs earned is determined based on our performance against predefined targets of revenue and return on invested capital ("ROIC") and, beginning with PUs granted in 2018, Adjusted EBITDA (as defined in Note 7). The number of PUs earned may range from 0% to 200% of the initial award. The number of PUs earned is determined based on our actual performance as compared to the targets at the end of a three -year performance period. Certain PUs that we grant will be earned based on a market condition associated with the total return on our common stock in relation to either (i) a subset of the Standard & Poor's 500 Index (for certain PUs granted prior to 2017), or (ii) the MSCI United States REIT Index (for certain PUs granted in 2017 and thereafter), rather than the revenue, ROIC and Adjusted EBITDA targets noted above. The number of PUs earned based on the applicable market condition may range from 0% to 200% of the initial award.

All of our PUs will be settled in shares of our common stock and are subject to cliff vesting three years from the date of the original PU grant. PUs awarded to employees who terminate their employment during the three -year performance period and on or after attaining age 55 and completing 10 years of qualifying service are eligible for pro-rated vesting, subject to the actual achievement against the predefined targets or a market condition as discussed above, based on the number of full years of service completed following the grant date (but delivery of the shares remains deferred). As a result, PUs are generally expensed over the three-year performance period.

All PUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of PUs in cash upon the settlement date of the associated PU and will be forfeited if the PU does not vest.

Cash dividends accrued and paid on PUs for the three months ended March 31, 2017 and 2018 are as follows:



	Three Months Ended March 31,
	2017		2018
Cash dividends accrued on PUs	$	324	$	450
Cash dividends paid on PUs	205		644

The majority of our PUs are earned based on our performance against revenue, ROIC and, beginning with PUs granted in 2018, Adjusted EBITDA targets during their applicable performance period; therefore, we forecast the likelihood of achieving the predefined revenue, ROIC and Adjusted EBITDA targets in order to calculate the expected PUs to be earned. We record a compensation charge based on either the forecasted PUs to be earned (during the performance period) or the actual PUs earned (at the three-year anniversary of the grant date) over the vesting period for each of the awards. The fair value of PUs based on our performance against revenue, ROIC and Adjusted EBITDA targets is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero). For PUs earned based on a market condition, we utilize a Monte Carlo simulation to fair value these awards at the date of grant, and such fair value is expensed over the three-year performance period. As of March 31, 2018 , we expected 100% , 100% and 100% achievement of the predefined revenue, ROIC and Adjusted EBITDA targets associated with the awards of PUs made in 2016 , 2017 and 2018 , respectively.

The fair value of earned PUs that vested during the three months ended March 31, 2017 and 2018 is as follows:



	Three Months Ended March 31,
	2017		2018
Fair value of earned PUs that vested	$	905	$	3,033

Table of Contents

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)

A summary of PU activity for the three months ended March 31, 2018 is as follows:



	Original PU Awards		PU Adjustment(1)		Total PU Awards		Weighted- Average Grant-Date Fair Value
Non-vested at December 31, 2017	717,878		(250,067	)	467,811		$	39.28
Granted	347,576		—		347,576		33.64
Vested	(79,121	)	—		(79,121	)	38.34
Forfeited/Performance or Market Conditions Not Achieved	(2,626	)	(49,881	)	(52,507	)	38.28
Non-vested at March 31, 2018	983,707		(299,948	)	683,759		$	36.60

_______________________________________________________________________________


(1)	Represents an increase or decrease in the number of original PUs awarded based on either the final performance criteria or market condition achievement at the end of the performance period of such PUs or a change in estimated awards based on the forecasted performance against the predefined targets.

Employee Stock Purchase Plan

We offer an ESPP in which participation is available to substantially all of our employees employed in the United States and Canada who meet certain service eligibility requirements. The price for shares purchased under the ESPP is 95% of the market price of our common stock at the end of the offering period, without a look-back feature. As a result, we do not recognize compensation expense for the ESPP shares purchased. As of March 31, 2018, we have 624,768 shares available under the ESPP.

As of March 31, 2018 , unrecognized compensation cost related to the unvested portion of our Employee Stock-Based Awards was $64,416 and is expected to be recognized over a weighted-average period of 2.3 years.

We generally issue shares of our common stock for the exercises of stock options, the vesting of RSUs and PUs and under our ESPP from unissued reserved shares.

Table of Contents

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. Income (Loss) Per Share—Basic and Diluted

Basic income (loss) per common share is calculated by dividing income (loss) by the weighted average number of common shares outstanding. The calculation of diluted income (loss) per share is consistent with that of basic income (loss) per share but gives effect to all potential common shares (that is, securities such as stock options, RSUs or PUs) that were outstanding during the period, unless the effect is antidilutive.

The calculation of basic and diluted income (loss) per share for the three months ended March 31, 2017 and 2018 is as follows:



	Three Months Ended March 31,
	2017			2018
Income (loss) from continuing operations	$	58,844		$	45,614
Less: Net income (loss) attributable to noncontrolling interests	382			468
Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation)	$	58,462		$	45,146
(Loss) income from discontinued operations, net of tax	$	(337	)	$	(462	)
Net income (loss) attributable to Iron Mountain Incorporated	$	58,125		$	44,684

Weighted-average shares—basic	263,855,000			285,259,000
Effect of dilutive potential stock options	461,761			249,564
Effect of dilutive potential RSUs and PUs	492,905			484,314
Weighted-average shares—diluted	264,809,666			285,992,878

Earnings (losses) per share—basic:
Income (loss) from continuing operations	$	0.22		$	0.16
Income (loss) from discontinued operations, net of tax	—			—
Net income (loss) attributable to Iron Mountain Incorporated(1)	$	0.22		$	0.16

Earnings (losses) per share—diluted:
Income (loss) from continuing operations	$	0.22		$	0.16
Income (loss) from discontinued operations, net of tax	—			—
Net income (loss) attributable to Iron Mountain Incorporated(1)	$	0.22		$	0.16

Antidilutive stock options, RSUs and PUs, excluded from the calculation	2,494,255			3,242,141

_______________________________________________________________________________

(1) Columns may not foot due to rounding.

Table of Contents

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. Income Taxes

We provide for income taxes during interim periods based on our estimate of the effective tax rate for the year. Our estimate of the effective tax rate for the year ending December 31, 2018 reflects the impact of the Tax Reform Legislation (as defined below). Discrete items and changes in our estimate of the annual effective tax rate are recorded in the period they occur. Our effective tax rate is subject to variability in the future due to, among other items: (1) changes in the mix of income between our qualified REIT subsidiaries ("QRSs") and our domestic taxable REIT subsidiaries ("TRSs"), as well as among the jurisdictions in which we operate; (2) tax law changes; (3) volatility in foreign exchange gains and losses; (4) the timing of the establishment and reversal of tax reserves; and (5) our ability to utilize net operating losses that we generate.

Our effective tax rates for the three months ended March 31, 2017 and 2018 were 13.5% and 2.5% , respectively. The primary reconciling items between the federal statutory tax rate of 35.0% and our overall effective tax rate for the three months ended March 31, 2017 were the benefit derived from the dividends paid deduction, a release of valuation allowances on certain of our foreign net operating losses of $7,511 as a result of the merger of certain of our foreign subsidiaries and differences in the rates of tax at which our foreign earnings are subject, including foreign exchange gains and losses in different jurisdictions with different tax rates. These benefits were partially offset by the impact of a legislative change enacted in the first quarter of 2017 in the United Kingdom which eliminated the deductibility of certain interest expense and increased our tax provision for the first quarter of 2017 by $1,764 , or 2.5% . The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three months ended March 31, 2018 were the benefit derived from the dividends paid deduction, a discrete tax benefit of approximately $14,000 associated with the resolution of a tax matter (as disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report), and the impact of differences in the tax rates at which our foreign earnings are subject, including foreign exchange gains and losses in different jurisdictions with different tax rates.

On December 22, 2017, legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Reform Legislation”) was enacted into law in the United States. The Tax Reform Legislation amends the Internal Revenue Code of 1986, as amended (the “Code”), to reduce tax rates and modify policies, credits and deductions for businesses and individuals. The components of the Tax Reform Legislation are described in detail in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report. One of the primary components of the Tax Reform Legislation was a reduction in the United States corporate federal income tax rate from 35.0% to 21.0% for taxable years beginning after December 31, 2017.

The Tax Reform Legislation also imposes a transition tax (the “Deemed Repatriation Transition Tax”) on a mandatory deemed repatriation of post-1986 undistributed foreign earnings and profits not previously subject to United States tax as of November 2, 2017 or December 31, 2017, whichever is greater (the “Undistributed E&P”) as of the last taxable year beginning before January 1, 2018. The Deemed Repatriation Transition Tax varies depending on whether the Undistributed E&P is held in liquid (as defined in the Tax Reform Legislation) or non-liquid assets. A participation deduction against the deemed repatriation will result in a Deemed Repatriation Transition Tax on Undistributed E&P of 15.5% if held in cash and liquid assets and 8% if held in non-liquid assets. The Deemed Repatriation Transition Tax applies regardless of whether or not an entity has cash in its foreign subsidiaries and regardless of whether the entity actually repatriates the Undistributed E&P back to the United States.

Our estimate of the amount of Undistributed E&P deemed repatriated under the Tax Reform Legislation in our taxable year ending December 31, 2017 is approximately $186,000 (the “Estimated Undistributed E&P”). We will opt to include the full amount of Estimated Undistributed E&P in our 2017 taxable income, rather than spread it over eight years (as permitted by the Tax Reform Legislation). Accordingly, included in our REIT taxable income for 2017 was approximately $82,000 related to the deemed repatriation of Undistributed E&P (the “Deemed Repatriation Taxable Income”). To remain qualified for taxation as a REIT, we are generally required to distribute at least 90% of our REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gains) each year to our stockholders.

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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)

The Estimated Undistributed E&P includes certain assumptions made by us regarding the cumulative earnings and profits of our foreign subsidiaries, as well as the characterization of such Estimated Undistributed E&P (liquid versus non-liquid assets). We are currently performing additional analysis to determine the actual amount of Undistributed E&P associated with our foreign subsidiaries, as well as the characterization of such Undistributed E&P, and anticipate this analysis will continue throughout 2018. We do not believe this will have an impact on our provision for income taxes or our qualification as a REIT. However, it may impact our shareholder dividend reporting.

h. Concentrations of Credit Risk

Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money market funds and time deposits) and accounts receivable. The only significant concentrations of liquid investments as of December 31, 2017 and March 31, 2018 , respectively, related to cash and cash equivalents. At December 31, 2017, we had money market funds with 12 "Triple A" rated money market funds and time deposits with seven global banks. At March 31, 2018, we had time deposits with seven global banks. As of December 31, 2017 , our cash and cash equivalents balance was $925,699 , including money market funds of $585,000 and time deposits of $24,482 . As of March 31, 2018, our cash and cash equivalents was $442,491 , including time deposits of $16,678 . We had no money market funds as of March 31, 2018.

i. Fair Value Measurements

Our financial assets or liabilities that are carried at fair value are required to be measured using inputs from the three levels of the fair value hierarchy. A financial asset or liability's classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The three levels of the fair value hierarchy are as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that we have the ability to access at the measurement date.

Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

Level 3—Unobservable inputs that reflect our assumptions about the assumptions that market participants would use in pricing the asset or liability.

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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)

The assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2017 and March 31, 2018 , respectively, are as follows:



			Fair Value Measurements at December 31, 2017 Using
Description	Total Carrying Value at December 31, 2017		Quoted prices in active markets (Level 1)			Significant other observable inputs (Level 2)			Significant unobservable inputs (Level 3)
Money Market Funds(1)	$	585,000	$	—		$	585,000		$	—
Time Deposits(1)	24,482		—			24,482			—
Trading Securities	11,784		11,279		(2)	505		(3)	—
Derivative Assets(4)	1,579		—			1,579			—
Derivative Liabilities(4)	2,329		—			2,329			—



			Fair Value Measurements at March 31, 2018 Using
Description	Total Carrying Value at March 31, 2018		Quoted prices in active markets (Level 1)			Significant other observable inputs (Level 2)			Significant unobservable inputs (Level 3)
Time Deposits(1)	$	16,678	$	—		$	16,678		$	—
Trading Securities	11,129		10,739		(2)	390		(3)	—
Derivative Liabilities(4)	1,102		—			1,102			—
Interest Rate Swap Agreements(5)	185		—			185			—

_______________________________________________________________________________


(1)	Money market funds and time deposits are measured based on quoted prices for similar assets and/or subsequent transactions.


(2)	Certain trading securities are measured at fair value using quoted market prices.


(3)	Certain trading securities are measured based on inputs other than quoted market prices that are observable.

(4)

Derivative assets and liabilities relate to short-term (six months or less) foreign currency contracts that we have entered into to hedge certain of our foreign exchange intercompany exposures, as more fully disclosed at Note 3. We calculate the value of such forward contracts by adjusting the spot rate utilized at the balance sheet date for translation purposes by an estimate of the forward points observed in active markets.


(5)	We have entered into interest rate swap agreements to hedge certain of our interest rate exposures, as more fully disclosed in Note 3. The interest rate swap agreements are designated as cash flow hedges and are measured based on inputs other than quoted market prices that are observable.

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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)

Disclosures are required in the financial statements for items measured at fair value on a non-recurring basis. We did not have any material items that are measured at fair value on a non-recurring basis at December 31, 2017 and March 31, 2018, with the exception of: (i) the reporting units as presented in our goodwill impairment analysis (as disclosed in Note 2.h. to Notes to Consolidated Financial Statements included in our Annual Report); (ii) the assets and liabilities acquired through acquisitions (as disclosed in Note 6 to Notes to Consolidated Financial Statements included in our Annual Report and Note 4); (iii) the Access Contingent Consideration (as defined and disclosed in Note 6 to Notes to Consolidated Financial Statements included in our Annual Report); (iv) the redemption value of certain redeemable noncontrolling interests (as disclosed in Note 2.x. to Notes to Consolidated Financial Statements included in our Annual Report); and (v) our investment in OSG Records Management (Europe) Limited (as disclosed in Note 14 to Notes to Consolidated Financial Statements included in our Annual Report), all of which are based on Level 3 inputs.

The fair value of our long-term debt, which was determined based on either Level 1 inputs or Level 3 inputs, is disclosed in Note 5. Long-term debt is measured at cost in our Condensed Consolidated Balance Sheets as of December 31, 2017 and March 31, 2018 .

j. Accumulated Other Comprehensive Items, Net

The changes in accumulated other comprehensive items, net for the three months ended March 31, 2017 and 2018 , respectively, are as follows:



	Foreign Currency Translation Adjustments			Total
Balance as of December 31, 2016	$	(212,573	)	$	(212,573	)
Other comprehensive income (loss):
Foreign currency translation adjustments	51,334			51,334
Total other comprehensive income (loss)	51,334			51,334
Balance as of March 31, 2017	$	(161,239	)	$	(161,239	)



	Foreign Currency Translation Adjustments			Fair Value Adjustments for Interest Rate Swap Agreements			Total
Balance as of December 31, 2017	$	(103,989	)	$	—		$	(103,989	)
Other comprehensive income (loss):
Foreign currency translation adjustments	30,092			—			30,092
Fair value adjustments for interest rate swap agreements	—			(185		)	(185		)
Total other comprehensive income (loss)	30,092			(185		)	29,907
Balance as of March 31, 2018	$	(73,897	)	$	(185	)	$	(74,082	)

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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)

k. Other (Income) Expense, Net

Other (income) expense, net for the three months ended March 31, 2017 and 2018 consists of the following:



	Three Months Ended March 31,
	2017			2018
Foreign currency transaction (gains) losses, net	$	(4,164	)	$	21,785
Other, net	(2,200		)	(1,634		)
	$	(6,364	)	$	20,151

l. Property, Plant and Equipment and Long-Lived Assets

During the three months ended March 31, 2017 and 2018, we capitalized $5,283 and $3,789 of costs, respectively, associated with the development of internal use computer software projects.

Consolidated gain on disposal/write-down of property, plant and equipment (excluding real estate), net for the three months ended March 31, 2017 was $459 and primarily consists of gains associated with the retirement of leased vehicles accounted for as capital lease assets within our North American Records and Information Management Business segment. Consolidated gain on disposal/write-down of property, plant and equipment (excluding real estate), net for the three months ended March 31, 2018 was $1,130 and primarily consists of gains associated with the retirement of leased vehicles accounted for as capital lease assets within our North American Records and Information Management Business segment and gains on sale of other property and equipment within our Other International Business segment.

m. New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In May 2014, the FASB issued ASU 2014-09. We adopted ASU 2014-09 on January 1, 2018 using the modified retrospective method. See Note 2.d. for information regarding the impact of the adoption of ASU 2014-09 on our consolidated financial statements.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 requires that most equity investments be measured at fair value, with subsequent changes in fair value recognized in net income, while eliminating the available-for-sale classification for equity securities with readily determinable fair values and the cost method for equity investments without readily determinable fair values. ASU 2016-01 also impacts financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. We adopted ASU 2016-01 on January 1, 2018. ASU 2016-01 did not have an impact on our consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). ASU 2017-12 amends the hedge accounting recognition and presentation requirements as outlined in Accounting Standards Codification Topic 815 with the objective of improving the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and enhance the transparency and understandability of hedge transactions. In addition, ASU 2017-12 simplifies the application of the hedge accounting guidance. We adopted ASU 2017-12 on January 1, 2018. ASU 2017-12 did not have a material impact on our consolidated financial statements.

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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 As Yet Adopted Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 requires lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. ASU 2016-02 also will require certain qualitative and quantitative disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. ASU 2016-02 will be effective for us on January 1, 2019, with early adoption permitted. We are in the process of establishing a cross-functional project team responsible for the assessment and implementation of ASU 2016-02. We are also in the process of identifying and evaluating the technology options available to update our lease accounting processes and systems in anticipation of our future adoption of ASU 2016-02. We are currently evaluating the impact ASU 2016-02 will have on our consolidated financial statements.

(3) Derivative Instruments and Hedging Activities

Historically, we have entered into forward contracts to hedge our exposures associated with certain foreign currencies. At the maturity of the forward contracts, we may enter into new forward contracts to hedge movements in the underlying currencies. At the time of settlement, we either pay or receive the net settlement amount from the forward contract and recognize this amount in Other (income) expense, net in the Consolidated Statements of Operations as a realized foreign exchange gain or loss. At the end of each month, we mark the outstanding forward contracts to market and record an unrealized foreign exchange gain or loss for the mark-to-market valuation. We have not designated any of the forward contracts we have entered into as hedges. As of December 31, 2017, we had outstanding forward contracts to (i) purchase $138,823 United States dollars and sell 176,000 Canadian dollars, (ii) purchase 135,000 Euros and sell $160,757 United States dollars and (iii) purchase $114,390 United States dollars and sell 96,150 Euros to hedge our foreign exchange exposures. As of March 31, 2018, we had outstanding forward contracts to purchase 133,000 Euros and sell $165,799 United States dollars to hedge our foreign exchange exposures. During the three months ended March 31, 2017, there were no cash receipts or payments included in cash from operating activities from continuing operations related to settlements associated with foreign currency forward contracts. During the three months ended March 31, 2018, cash receipts included in cash from operating activities from continuing operations related to settlements associated with foreign currency forward contracts was $6,343 .

Our policy is to record the fair value of each derivative instrument on a gross basis. The following table provides the fair value of our derivative instruments not designated as hedging instruments as of December 31, 2017 and March 31, 2018:



Derivatives Not Designated as Hedging Instruments	Balance Sheet Location	December 31, 2017		March 31, 2018
Derivative assets	Prepaid expenses and other	$	1,579	$	—
Derivative liabilities	Accrued expenses	2,329		1,102

(Gains) losses for our derivative instruments not recognized as hedging instruments for the three months ended March 31, 2017 and 2018 are as follows:



		Three Months Ended March 31,
Derivatives Not Designated as Hedging Instruments	Location of Loss (Gain) Recognized in Income on Derivative	2017		2018
Foreign exchange contracts	Other (income) expense, net	$	—	$	(5,991	)

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(3) Derivative Instruments and Hedging Activities (Continued)

We have designated a portion of our (i) Euro denominated borrowings by IMI under our Former Revolving Credit Facility and (ii) Euro Notes (each as defined in Note 5) as a hedge of net investment of certain of our Euro denominated subsidiaries. For the three months ended March 31, 2017, we designated, on average, 49,600 Euros of our Euro denominated borrowings by IMI under our Former Revolving Credit Facility as a hedge of net investment of certain of our Euro denominated subsidiaries. For the three months ended March 31, 2018, we designated, on average, 164,244 Euros of our Euro Notes as a hedge of net investment of certain of our Euro denominated subsidiaries. As a result, we recorded the following foreign exchange (losses) gains related to the change in fair value of such debt due to currency translation adjustments, which is a component of accumulated other comprehensive items, net:



	Three Months Ended March 31,
	2017			2018
Foreign exchange (losses) gains	$	(1,072	)	$	(5,635	)

As of March 31, 2018 , cumulative net losses of $2,447 , net of tax, are recorded in accumulated other comprehensive items, net associated with this net investment hedge.

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. As of March 31, 2018, we have $350,000 in notional value of interest rate swap agreements outstanding, which expire in March 2022. 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 rate payments (at the fixed rate interest specified in the interest rate swap agreements). We have designated these interest rate swaps as cash flow hedges. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The fair value of the interest rate swaps are estimated using industry standard valuation models using market-based observable inputs, including interest rate curves (Level 2, as described in Note 2.i.). At March 31, 2018, we had a derivative liability of $185 , which was recorded as a component of Other Long-Term Liabilities on our Condensed Consolidated Balance Sheet, which represents the fair value of our interest rate swap agreements.

We have recorded the change in fair value of the interest rate swap agreements to accumulated other comprehensive income. At March 31, 2018, we have recorded an unrealized loss of $185 within accumulated other comprehensive items, net associated with these agreements.

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(4) Acquisitions

We account for acquisitions using the acquisition method of accounting, and, accordingly, the assets and liabilities acquired are recorded at their estimated fair values and the results of operations for each acquisition have been included in our consolidated results from their respective acquisition dates.

a. Acquisition of IO Data Centers

On January 10, 2018, we completed the acquisition of the United States operations of IODC, a leading data center colocation space and solutions provider based in Phoenix, Arizona, including the land and buildings associated with four data centers in Phoenix and Scottsdale, Arizona; Edison, New Jersey; and Columbus, Ohio (the “IODC Transaction”). At the closing of the IODC Transaction, we paid approximately $1,347,000 . In addition to the amount paid at the closing of the IODC Transaction, there is the potential of $35,000 in additional payments associated with the execution of future customer contracts. We have accounted for the IODC Transaction as an acquisition of a business in accordance with the guidance in ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business .

The unaudited consolidated pro forma financial information (the "Pro Forma Financial Information") below summarizes the combined results of us and IODC on a pro forma basis as if the IODC Transaction had occurred on January 1, 2017. 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, 2017. The Pro Forma Financial Information, for all periods presented, includes our current estimates of purchase accounting adjustments (including amortization expenses from acquired intangible assets and depreciation of acquired property, plant and equipment). Through March 31, 2018 , we and IODC have collectively incurred $28,064 of operating expenditures to complete the IODC Transaction (including advisory and professional fees). These operating expenditures have been reflected within the results of operations in the Pro Forma Financial Information as if they were incurred on January 1, 2017.



	Three Months Ended March 31,
	2017		2018
Total Revenues	$	973,757	$	1,045,929
Income from Continuing Operations	$	17,431	$	55,181
Per Share Income from Continuing Operations - Basic	$	0.06	$	0.19
Per Share Income from Continuing Operations - Diluted	$	0.06	$	0.19

In addition to our acquisition of IODC, we completed certain other acquisitions during 2017 and 2018. The Pro Forma Financial Information does not reflect these acquisitions due to the insignificant impact of these acquisitions on our consolidated results of operations.

b. Other Noteworthy Acquisitions

On March 8, 2018, in order to expand our data center operations into Europe and Asia, we acquired the operations of two data centers in London and Singapore from Credit Suisse International and Credit Suisse AG (together, "Credit Suisse") for the total of (i) 34,600 British pounds sterling and (ii) 81,000 Singapore dollars (or collectively, approximately $111,400 , based upon the exchange rates between the United States dollar and the British pound sterling and Singapore dollar on the closing date of the Credit Suisse transaction) (the “Credit Suisse Transaction”). As part of the Credit Suisse Transaction, Credit Suisse entered into a long-term lease with us to maintain existing data center operations.

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(4) Acquisitions (Continued)

In November 2017, we entered into an agreement to acquire (i) the storage and information management assets and operations of Santa Fe Group A/S ("Santa Fe") in China (the “Santa Fe China Transaction”) for approximately 14,000 Euros and (ii) certain real estate property located in Beijing, China owned by Santa Fe (the “Beijing Property”) for approximately 9,000 Euros, representing a total purchase price of approximately 23,000 Euros, subject to customary purchase price adjustments. We closed on the Santa Fe China Transaction on December 29, 2017. The purchase price for the Santa Fe China Transaction was not paid until January 2018 and, therefore, we accrued for the purchase price of the Santa Fe China Transaction (which was approximately $16,800 , based upon the exchange rate between the Euro and the United States dollar on the closing date of the Santa Fe China Transaction) in our Consolidated Balance Sheet as of December 31, 2017 (the “Accrued Purchase Price”). The Accrued Purchase Price is presented as a component of the current portion of long-term debt in our Consolidated Balance Sheet as of December 31, 2017. We paid the purchase price of the Santa Fe China Transaction on January 3, 2018. We expect to close on the acquisition of the Beijing Property during the first half of 2018. The completion of the acquisition of the Beijing Property is subject to closing conditions; accordingly, we can provide no assurances that we will be able to complete the acquisition of the Beijing Property, that it will not be delayed or that the terms will remain the same.

A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2018 acquisitions through March 31, 2018 is as follows:



	IODC Transaction				Other Fiscal Year 2018 Acquisitions (excluding IODC)			Total
Cash Paid (gross of cash acquired)(1)	$	1,347,046			$	112,947		$	1,459,993
Purchase price holdbacks	—				149			149
Total Consideration	1,347,046				113,096			1,460,142
Fair Value of Identifiable Assets Acquired:
Cash	34,227				—			34,227
Accounts Receivable and Prepaid Expenses	7,070				558			7,628
Property, Plant and Equipment(2)	863,027				111,267			974,294
Customer Relationship Intangible Assets	—				1,593			1,593
Data Center In-Place Leases	128,513				9,492			138,005
Data Center Tenant Relationships	102,850				—			102,850
Data Center Above-Market Leases	16,439				—			16,439
Accounts Payable, Accrued Expenses and Other Liabilities	(23,198		)		—			(23,198		)
Deferred Income Taxes	—				(9,814		)	(9,814		)
Data Center Below-Market Leases	(11,421		)		—			(11,421		)
Total Fair Value of Identifiable Net Assets Acquired	1,117,507			1,117,507	113,096			1,230,603
Goodwill Initially Recorded(3)	$	229,539			$	—		$	229,539

_______________________________________________________________________________

(1)

Included in cash paid for acquisitions in the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2018 is net cash acquired of $34,227 and contingent and other payments, net of $3,208 related to acquisitions made in previous years. The cash paid for the Accrued Purchase Price for the Santa Fe China Transaction is included in cash flows from financing activities (as a component of repayment of revolving credit, term loan and bridge facilities and other debt) in the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2018.


(2)	Consists primarily of building, building improvements, leasehold improvements, racking structures and warehouse equipment. These assets are depreciated using the straight-line method with the useful lives as noted in Note 2.f. to Notes to Consolidated Financial Statements included in our Annual Report.

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(4) Acquisitions (Continued)

(3) The goodwill associated with acquisitions 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.

Allocations of the purchase price for acquisitions made in 2017 and 2018 were based on estimates of the fair value of the net assets acquired and are subject to adjustment upon the finalization of the purchase price allocations. The accounting for business combinations (including the accounting for the acquisition of assets) requires estimates and judgments as to expectations for future cash flows of the acquired business, and the allocations of those cash flows to identifiable tangible and intangible assets, in determining the assets acquired and liabilities assumed. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management's best estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary valuation procedures and techniques. The estimates and assumptions underlying the initial valuations are subject to the collection of information necessary to complete the valuations within the measurement periods, which are up to one year from the respective acquisition dates. The preliminary purchase price allocations that are not finalized as of March 31, 2018 primarily relate to the final assessment of the fair values of intangible assets (primarily customer relationship intangible assets and data center lease-based intangible assets), property, plant and equipment (primarily building, building improvements and racking structures), operating leases, contingencies and income taxes (primarily deferred income taxes), primarily associated with the Bonded Transaction, the Santa Fe Transaction, the Fortrust Transaction (each as defined in Note 6 to Notes to Consolidated Financial Statements included in our Annual Report), the IODC Transaction and the Credit Suisse Transaction, as well as other acquisitions which closed in 2018.

As the valuation of certain assets and liabilities for purposes of purchase price allocations are preliminary in nature, they are subject to adjustment as additional information is obtained about the facts and circumstances regarding these assets and liabilities that existed at the acquisition date. Any adjustments to our estimates of purchase price allocation will be made in the periods in which the adjustments are determined and the cumulative effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition dates. Adjustments recorded during the three months ended March 31, 2018 were not material to our results from operations.

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(5) Debt

Long-term debt is as follows:



	December 31, 2017											March 31, 2018
	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	$	466,593		$	(14,407	)	$	452,186		$	466,593	$	800,158			$	(13,688	)	$	786,470		$	800,158
Term Loan A	243,750			—			243,750			243,750		240,625				—			240,625			240,625
Term Loan B	—			—			—			—		698,250				(8,698		)	689,552			700,000
Australian Dollar Term Loan (the "AUD Term Loan")	187,504			(3,382		)	184,122			189,049		259,431				(3,761		)	255,670			261,662
4 ³ / ₈ % Senior Notes due 2021 (the "4 ³ / ₈ % Notes")(1)(2)	500,000			(5,874		)	494,126			507,500		500,000				(5,444		)	494,556			501,250
6% Senior Notes due 2023 (the "6% Notes due 2023")(1)	600,000			(6,224		)	593,776			625,500		600,000				(5,949		)	594,051			618,000
5 ³ / ₈ % CAD Senior Notes due 2023 (the "CAD Notes due 2023")(2)(3)	199,171			(3,295		)	195,876			208,631		193,826				(3,067		)	190,759			196,482
5 ³ / ₄ % Senior Subordinated Notes due 2024 (the "5 ³ / ₄ % Notes")(1)	1,000,000			(9,156		)	990,844			1,012,500		1,000,000				(8,812		)	991,188			970,000
3% Euro Senior Notes due 2025 (the "Euro Notes")(1)(2)	359,386			(4,691		)	354,695			364,776		369,711				(4,567		)	365,144			366,014
3 ⁷ / ₈ % GBP Senior Notes due 2025 (the "GBP Notes due 2025")(2)	539,702			(7,718		)	531,984			527,559		560,516				(7,758		)	552,758			529,789
5 ³ / ₈ % Senior Notes due 2026 (the "5 ³ / ₈ % Notes")(2)	250,000			(3,615		)	246,385			256,875		250,000				(3,508		)	246,492			240,313
4 ⁷ / ₈ % Senior Notes due 2027 (the "4 ⁷ / ₈ % Notes")(1)(2)	1,000,000			(13,866		)	986,134			1,000,000		1,000,000				(13,509		)	986,491			927,500
5 ¹ / ₄ % Senior Notes due 2028 (the "5 ¹ / ₄ % Notes")(1)(2)	825,000			(11,817		)	813,183			826,031		825,000				(11,817		)	813,183			773,438
Real Estate Mortgages, Capital Leases and Other	649,432			(566		)	648,866			649,432		630,868				(451		)	630,417			630,868
Accounts Receivable Securitization Program	258,973			(356		)	258,617			258,973		272,273				(321		)	271,952			272,273
Mortgage Securitization Program	50,000			(1,273		)	48,727			50,000		50,000				(1,237		)	48,763			50,000
Total Long-term Debt	7,129,511			(86,240		)	7,043,271					8,250,658			—	(92,587		)	8,158,071
Less Current Portion	(146,300		)	—			(146,300		)			(137,198		)		—			(137,198		)
Long-term Debt, Net of Current Portion	$	6,983,211		$	(86,240	)	$	6,896,971				$	8,113,460			$	(92,587	)	$	8,020,873

______________________________________________________________


(1)	Collectively, the "Parent Notes".


(2)	Collectively, the "Unregistered Notes".


(3)	Together, with our previously outstanding 6 ¹ / ₈ % CAD Senior Notes due 2021 (the "CAD Notes due 2021"), the "CAD Notes".

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(5) Debt (Continued)

See Note 4 to Notes to Consolidated Financial Statements included in our Annual 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 March 31, 2018 are consistent with the levels of the fair value hierarchy used to determine the fair value of our debt as of December 31, 2017 (which are disclosed in our Annual Report). Additionally, see Note 6 for information regarding which of our consolidated subsidiaries guarantee certain of our debt instruments.

a. Credit Agreement

On August 21, 2017, we entered into a new credit agreement (as amended, the "Credit Agreement") which amended and restated our then existing credit agreement (the "Former Credit Agreement") which consisted of a revolving credit facility (the "Former Revolving Credit Facility") and a term loan (the "Former Term Loan") and was scheduled to terminate on July 6, 2019. The Credit Agreement consists of a revolving credit facility (the "Revolving Credit Facility") and a term loan (the "Term Loan A"). The maximum amount permitted to be borrowed under the Revolving Credit Facility is $1,750,000 . The original amount of the Term Loan A was $250,000 . On March 22, 2018, we entered into an amendment (the “2018 Amendment”) to the Credit Agreement which provided us with the option to request additional commitments of up to $1,260,000 under the Credit Agreement, in the form of term loans or through increased commitments under the Revolving Credit Facility, subject to the conditions specified in the Credit Agreement, as amended. The Credit Agreement is scheduled to mature on August 21, 2022, at which point all obligations become due.

The Revolving Credit Facility enables IMI and certain of its United States and foreign subsidiaries to borrow in United States dollars and (subject to sublimits) a variety of other currencies (including Canadian dollars, British pounds sterling and Euros, among other currencies) in an aggregate outstanding amount not to exceed $1,750,000 . The Term Loan A is being paid in quarterly installments in an amount equal to $3,125 per quarter, with the remaining balance due on August 21, 2022.

IMI and the Guarantors guarantee all obligations under the Credit Agreement. The interest rate on borrowings under the Credit Agreement varies depending on our choice of interest rate and currency options, plus an applicable margin, which varies based on our consolidated leverage ratio. Additionally, the Credit Agreement requires the payment of a commitment fee on the unused portion of the Revolving Credit Facility, which fee ranges from between 0.25% to 0.4% based on our consolidated leverage ratio and fees associated with outstanding letters of credit. As of March 31, 2018, we had $800,158 and $240,625 of outstanding borrowings under the Revolving Credit Facility and the Term Loan A, respectively. Of the $800,158 of outstanding borrowings under the Revolving Credit Facility, $548,000 was denominated in United States dollars, 179,000 was denominated in Canadian dollars and 92,000 was denominated in Euros. In addition, we also had various outstanding letters of credit totaling $54,673 . The remaining amount available for borrowing under the Revolving Credit Facility as of March 31, 2018, which is based on IMI's leverage ratio, the last 12 months' earnings before interest, taxes, depreciation and amortization and rent expense ("EBITDAR"), other adjustments as defined in the Credit Agreement and current external debt, was $895,169 (which amount represents the maximum availability as of such date). The average interest rate in effect under the Credit Agreement was 3.3% as of March 31, 2018 . The average interest rate in effect under the Revolving Credit Facility as of March 31, 2018 was 3.3% and ranged from 1.8% to 5.5% as of March 31, 2018 and the interest rate in effect under the Term Loan A as of March 31, 2018 was 3.6% .

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(5) Debt (Continued)

The capital stock or other equity interests of most of our United States subsidiaries, and up to 66% of the capital stock or other equity interests of most of our first-tier foreign subsidiaries, are pledged to secure borrowings under the Credit Agreement, together with all intercompany obligations (including promissory notes) of subsidiaries owed to us or to one of our United States subsidiary guarantors. In addition, Iron Mountain Canada Operations ULC ("Canada Company") has pledged 66% of the capital stock of its subsidiaries, and all intercompany obligations (including promissory notes) owed to or held by it, to secure the Canadian dollar subfacility under the Revolving Credit Facility.

On March 22, 2018, in connection with the 2018 Amendment, Iron Mountain Information Management, LLC ("IMIM") entered into an incremental term loan activation notice, or the Activation Notice, with certain lenders pursuant to which the lenders party to the Activation Notice agreed to provide commitments to fund an incremental term loan B in the amount of $700,000 (the “Term Loan B”). On March 26, 2018, we borrowed the full amount of the Term Loan B, which matures on January 2, 2026. The Term Loan B was issued at 99.75% of par. The aggregate net proceeds of approximately $689,850 , after paying commissions to the joint lead arrangers and net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility. The Term Loan B holders benefit from the same security and guarantees as other borrowings under the Credit Agreement. The Term Loan B holders also benefit from the same affirmative and negative covenants as other borrowings under the Credit Agreement; however, the Term Loan B holders are not generally entitled to the benefits of the financial covenants under the Credit Agreement.

Principal payments on the Term Loan B are to be paid in quarterly installments of $1,750 per quarter during the period June 30, 2018 through December 31, 2025, with the balance due on January 2, 2026. The Term Loan B may be prepaid without penalty at any time after the six month anniversary of the borrowing date. The Term Loan B bears interest at a rate of LIBOR plus 1.75% . At March 31, 2018, we had $700,000 outstanding on the Term Loan B and the interest rate in effect under the Term Loan B was 3.6% . The amount of debt for the Term Loan B reflects an unamortized original issue discount of $1,750 as of March 31, 2018.

The Credit Agreement, our 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 certain other 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 indentures or other agreements governing our indebtedness. The Credit Agreement uses EBITDAR-based calculations as the primary measures of financial performance, including leverage and fixed charge coverage ratios.

Our leverage and fixed charge coverage ratios under the Credit Agreement as of December 31, 2017 and March 31, 2018, as well as our leverage ratio under our indentures as of December 31, 2017 and March 31, 2018 are as follows:



	December 31, 2017	March 31, 2018	Maximum/Minimum Allowable
Net total lease adjusted leverage ratio	5.0	5.6	Maximum allowable of 6.5
Net secured debt lease adjusted leverage ratio	1.6	2.4	Maximum allowable of 4.0
Bond leverage ratio (not lease adjusted)	5.8	5.8	Maximum allowable of 6.5-7.0(1)(2)
Fixed charge coverage ratio	2.1	2.2	Minimum allowable of 1.5

______________________________________________________________

(1)

The maximum allowable leverage ratio under our indentures for the 4 ⁷ / ₈ % Notes, the GBP Notes due 2025 and the 5 ¹ / ₄ % Notes is 7.0 , while the maximum allowable leverage ratio under the indentures pertaining to our remaining senior and senior subordinated notes is 6.5 . In certain instances as provided in our indentures, we have the ability to incur additional indebtedness that would result in our bond leverage ratio exceeding the maximum allowable ratio under our indentures and still remain in compliance with the covenant.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(5) Debt (Continued)

(2)

At December 31, 2017, a portion of the net proceeds from the 5 ¹ / ₄ % Notes, together with a portion of the net proceeds of the Equity Offering (as defined in Note 9), were used to temporarily repay approximately $807,000 of outstanding indebtedness under our Revolving Credit Facility until the closing of the IODC Transaction, which occurred on January 10, 2018 (as described in Note 4). The bond leverage ratio at December 31, 2017 is calculated based on our outstanding indebtedness at this date, which reflects the temporary payment of the Revolving Credit Facility.

Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition and liquidity.

b. Australian Dollar Term Loan

On March 27, 2018, Iron Mountain Australia Group Pty Ltd, a wholly owned subsidiary of IMI, amended its AUD Term Loan (the "AUD Term Loan Amendment") to (i) increase the borrowings under the AUD Term Loan from 250,000 Australian dollars to 350,000 Australian dollars; (ii) increase the quarterly principal payments from 6,250 Australian dollars per year to 8,750 Australian dollars per year and (iii) decrease the interest rate on the AUD Term Loan from BBSY (an Australian benchmark variable interest rate) plus 4.3% to BBSY plus 3.875% . The AUD Term Loan matures in September 2022. All indebtedness associated with the AUD Term Loan was issued at 99% of par. The net proceeds associated with the AUD Term Loan Amendment of approximately 99,000 Australian dollars (or approximately $75,621 , based on the exchange rate between the Australian dollar and the United States dollar on March 29, 2018 (the closing date of the AUD Term Loan Amendment)), net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility.

Principal payments on the AUD Term Loan are to be paid in quarterly installments in an amount equivalent to an aggregate of 8,750 Australian dollars per year, with the remaining balance due September 22, 2022. The AUD Term Loan is secured by substantially all assets of Iron Mountain Australia Group Pty. Ltd. IMI and its direct and indirect 100% owned United States subsidiaries that represent the substantial majority of its United States operations (the “Guarantors”) guarantee all obligations under the AUD Term Loan. As of March 31, 2018, we had 340,625 Australian dollars ( $261,662 based upon the exchange rate between the United States dollar and the Australian dollar as of March 31, 2018 ) outstanding on the AUD Term Loan and the interest rate in effect under the AUD Term Loan was 5.9% . The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $1,545 and $2,231 as of December 31, 2017 and March 31, 2018, respectively.

c. Accounts Receivable Securitization Program

We are a party to a $275,000 accounts receivable securitization program (the "Accounts Receivable Securitization Program") involving several of our wholly owned subsidiaries and certain financial institutions, which matures on July 30, 2020, at which point all obligations become due. Under the Accounts Receivable Securitization Program, certain of our subsidiaries sell substantially all of their United States accounts receivable balances to our wholly owned special purpose entities, Iron Mountain Receivables QRS, LLC and Iron Mountain Receivables TRS, LLC (the "Accounts Receivable Securitization Special Purpose Subsidiaries"). The Accounts Receivable Securitization Special Purpose Subsidiaries use the accounts receivable balances to collateralize loans obtained from certain financial institutions. The Accounts Receivable Securitization Special Purpose Subsidiaries are consolidated subsidiaries of IMI. The Accounts Receivable Securitization Program is accounted for as a collateralized financing activity, rather than a sale of assets, and therefore: (i) accounts receivable balances pledged as collateral are presented as assets and borrowings are presented as liabilities on our Condensed Consolidated Balance Sheets, (ii) our Condensed Consolidated Statements of Operations reflect the associated charges for bad debt expense related to pledged accounts receivable (a component of selling, general and administrative expenses) and reductions to revenue due to billing and service related credit memos issued to customers and related reserves, as well as interest expense associated with the collateralized borrowings and (iii) receipts from customers related to the underlying accounts receivable are reflected as operating cash flows and borrowings and repayments under the collateralized loans are reflected as financing cash flows within our Condensed Consolidated Statements of Cash Flows. IMIM retains the responsibility of servicing the accounts receivable balances pledged as collateral for the Accounts Receivable Securitization Program and IMI provides a performance guaranty.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(5) Debt (Continued)

The maximum availability allowed under the Accounts Receivable Securitization Program is limited by eligible accounts receivable, as defined under the terms of the Accounts Receivable Securitization Program. As of March 31, 2018 , the maximum availability allowed and amount outstanding under the Accounts Receivable Securitization Program was $272,273 . The interest rate in effect under the Accounts Receivable Securitization Program was 2.9% as of March 31, 2018 .

d. Cash Pooling

Certain of our subsidiaries participate in cash pooling arrangements (the “Cash Pools”) with Bank Mendes Gans (“BMG”), an independently operated fully-owned subsidiary of ING Group, in order to help manage global liquidity requirements. Under the Cash Pools, cash deposited by participating subsidiaries with BMG is pledged as security against the debit balances of other participating subsidiaries, and legal rights of offset are provided and, therefore, amounts are presented in our Condensed Consolidated Balance Sheets on a net basis. Each subsidiary receives interest on the cash balances held on deposit or pays interest on its debit balances based on an applicable rate as defined in the Cash Pools. We currently utilize two separate cash pools with BMG, one of which we utilize to manage global liquidity requirements for our QRSs (the "QRS Cash Pool") and the other for our TRSs (the "TRS Cash Pool").

As of December 31, 2017, we had a net cash position of approximately $5,700 in the QRS Cash Pool (which consisted of a gross cash position of approximately $383,700 less outstanding debit balances of approximately $378,000 by participating subsidiaries) and we had a zero balance in the TRS Cash Pool (which consisted of a gross cash position of approximately $229,600 less outstanding debit balances of approximately $229,600 by participating subsidiaries). As of March 31, 2018, we had a net cash position of approximately $2,600 in the QRS Cash Pool (which consisted of a gross cash position of approximately $389,200 less outstanding debit balances of approximately $386,600 by participating subsidiaries) and we had a $18,900 balance in the TRS Cash Pool (which consisted of a gross cash position of approximately $262,400 less outstanding debit balances of approximately $243,500 by participating subsidiaries). The net cash position balances as of December 31, 2017 and March 31, 2018 are reflected as cash and cash equivalents in the Condensed Consolidated Balance Sheets.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors

The following data summarizes the consolidating results of IMI on the equity method of accounting as of December 31, 2017 and March 31, 2018 and for the three months ended March 31, 2017 and 2018 and are prepared on the same basis as the consolidated financial statements.

The Parent Notes, CAD Notes, the 6 ¹ / ₈ % GBP Senior Notes due 2022 (the "GBP Notes due 2022") (which were redeemed in November 2017), GBP Notes due 2025, and the 5 ³ / ₈ % Notes are guaranteed by the subsidiaries referred to below as the Guarantors. These subsidiaries are 100% owned by IMI. The guarantees are full and unconditional, as well as joint and several.

Additionally, IMI guarantees the CAD Notes, which were issued by Canada Company, the GBP Notes due 2022, which were issued by Iron Mountain Europe PLC ("IME"), the GBP Notes due 2025, which were issued by Iron Mountain (UK) PLC ("IM UK"), and the 5 ³ / ₈ % Notes, which were issued by Iron Mountain US Holdings, Inc, which is one of the Guarantors. Canada Company, IME and IM UK do not guarantee the Parent Notes. The subsidiaries that do not guarantee the Parent Notes, the CAD Notes, the GBP Notes due 2022, the GBP Notes due 2025, and the 5 ³ / ₈ % Notes, including IME, IM UK, the Accounts Receivable Securitization Special Purpose Subsidiaries and Iron Mountain Mortgage Finance I, LLC (the "Mortgage Securitization Special Purpose Subsidiary"), are referred to below as the Non-Guarantors. As discussed below, the results of the Non-Guarantors for the three months ended March 31, 2017 exclude the results of Canada Company, as those are presented in a separate column.

The CAD Notes due 2021 were issued by Canada Company and registered under the Securities Act of 1933, as amended (the “Securities Act”). The CAD Notes due 2023 have not been registered under the Securities Act, or under the securities laws of any other jurisdiction. We redeemed the CAD Notes due 2021 in August 2017 and, therefore, as of that date, Canada Company had no outstanding debt registered under the Securities Act that would require the presentation of Canada Company on a standalone basis in the accompanying consolidating financial statements. Accordingly, (i) the assets, liabilities and equity of Canada Company are presented as a component of the Non-Guarantor subsidiaries in the accompanying Condensed Consolidated Balance Sheets as of December 31, 2017 and March 31, 2018, respectively, (ii) the revenues, expenses and other comprehensive income (loss) of Canada Company are presented as a component of the Non-Guarantor subsidiaries in the Condensed Consolidated Statement of Operations and Comprehensive Income (Loss) for the three months ended March 31, 2018, and (iii) the operating, investing and financing cash flows for Canada Company are presented as a component of the Non-Guarantor subsidiaries in the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2018.

In the normal course of business, we periodically change the ownership structure of our subsidiaries to meet the requirements of our business. In the event of such changes, we recast the prior period financial information within this footnote to conform to the current period presentation in the period such changes occur. Generally, these changes do not alter the designation of the underlying subsidiaries as Guarantors or Non-Guarantors. However, they may change whether the underlying subsidiary is owned by the Parent, a Guarantor or a Non-Guarantor. If such a change occurs, the amount of investment in subsidiaries in the below Condensed Consolidated Balance Sheets and equity in the earnings (losses) of subsidiaries, net of tax in the below Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) with respect to the relevant Parent, Guarantors, Non-Guarantors and Eliminations columns also would change.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED BALANCE SHEETS



	December 31, 2017
	Parent		Guarantors		Non- Guarantors		Eliminations			Consolidated
Assets
Current Assets:
Cash and cash equivalents(1)	$	2,433	$	634,317	$	383,675	$	(94,726	)	$	925,699
Accounts receivable	—		32,972		802,770		—			835,742
Intercompany receivable	332,293		149,731		—		(482,024		)	—
Prepaid expenses and other	1,579		103,643		83,681		(29		)	188,874
Total Current Assets	336,305		920,663		1,270,126		(576,779		)	1,950,315
Property, Plant and Equipment, Net	316		2,030,875		1,386,488		—			3,417,679
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	4,578,995		—		—		(4,578,995		)	—
Investment in subsidiaries	1,858,045		885,999		—		(2,744,044		)	—
Goodwill	—		2,577,310		1,492,957		—			4,070,267
Other	—		796,913		737,228		—			1,534,141
Total Other Assets, Net	6,437,040		4,260,222		2,230,185		(7,323,039		)	5,604,408
Total Assets	$	6,773,661	$	7,211,760	$	4,886,799	$	(7,899,818	)	$	10,972,402
Liabilities and Equity
Intercompany Payable	$	—	$	—	$	482,024	$	(482,024	)	$	—
Debit Balances Under Cash Pools	—		56,233		38,493		(94,726		)	—
Current Portion of Long-Term Debt	—		54,247		92,082		(29		)	146,300
Total Other Current Liabilities	235,062		527,549		421,262		—			1,183,873
Long-Term Debt, Net of Current Portion	4,232,759		758,166		1,906,046		—			6,896,971
Long-Term Notes Payable to Affiliates and Intercompany Payable	—		4,578,995		—		(4,578,995		)	—
Other Long-term Liabilities	—		113,024		241,974		—			354,998
Commitments and Contingencies (See Note 8)
Redeemable Noncontrolling Interests	8,402		—		83,016		—			91,418
Total Iron Mountain Incorporated Stockholders' Equity	2,297,438		1,123,546		1,620,498		(2,744,044		)	2,297,438
Noncontrolling Interests	—		—		1,404		—			1,404
Total Equity	2,297,438		1,123,546		1,621,902		(2,744,044		)	2,298,842
Total Liabilities and Equity	$	6,773,661	$	7,211,760	$	4,886,799	$	(7,899,818	)	$	10,972,402

______________________________________________________________


(1)	Included within Cash and Cash Equivalents at December 31, 2017 is approximately $38,400 and $62,000 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 5 for more information on our Cash Pools.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED BALANCE SHEETS (Continued)



	March 31, 2018
	Parent		Guarantors		Non- Guarantors		Eliminations			Consolidated
Assets
Current Assets:
Cash and cash equivalents(1)	$	3,194	$	75,061	$	395,283	$	(31,047	)	$	442,491
Accounts receivable	—		28,731		830,375		—			859,106
Intercompany receivable	172,289		82,219		—		(254,508		)	—
Prepaid expenses and other	—		125,373		97,932		(29		)	223,276
Total Current Assets	175,483		311,384		1,323,590		(285,584		)	1,524,873
Property, Plant and Equipment, Net	283		2,935,396		1,429,792		—			4,365,471
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	4,662,099		—		—		(4,662,099		)	—
Investment in subsidiaries	1,875,464		893,419		—		(2,768,883		)	—
Goodwill	—		2,813,151		1,512,327		—			4,325,478
Other	—		1,027,985		754,342		—			1,782,327
Total Other Assets, Net	6,537,563		4,734,555		2,266,669		(7,430,982		)	6,107,805
Total Assets	$	6,713,329	$	7,981,335	$	5,020,051	$	(7,716,566	)	$	11,998,149
Liabilities and Equity
Intercompany Payable	$	—	$	—	$	254,508	$	(254,508	)	$	—
Debit Balances Under Cash Pools	—		4,287		26,760		(31,047		)	—
Current Portion of Long-Term Debt	—		60,778		76,449		(29		)	137,198
Total Other Current Liabilities	199,577		487,627		406,660		—			1,093,864
Long-Term Debt, Net of Current Portion	4,244,612		1,514,579		2,261,682		—			8,020,873
Long-Term Notes Payable to Affiliates and Intercompany Payable	—		4,662,099		—		(4,662,099		)	—
Other Long-term Liabilities	185		120,998		270,879		—			392,062
Commitments and Contingencies (See Note 8)
Redeemable Noncontrolling Interests	9,208		—		83,669		—			92,877
Total Iron Mountain Incorporated Stockholders' Equity	2,259,747		1,130,967		1,637,916		(2,768,883		)	2,259,747
Noncontrolling Interests	—		—		1,528		—			1,528
Total Equity	2,259,747		1,130,967		1,639,444		(2,768,883		)	2,261,275
Total Liabilities and Equity	$	6,713,329	$	7,981,335	$	5,020,051	$	(7,716,566	)	$	11,998,149

______________________________________________________________


(1)	Included within Cash and Cash Equivalents at March 31, 2018 is approximately $45,600 and $6,900 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 5 for more information on our Cash Pools.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)



	Three Months Ended March 31, 2017
	Parent			Guarantors			Canada Company			Non- Guarantors			Eliminations			Consolidated
Revenues:
Storage rental	$	—		$	349,351		$	32,006		$	190,922		$	—		$	572,279
Service	—			218,209			16,050			132,338			—			366,597
Intercompany revenues	—			1,097			—			22,342			(23,439		)	—
Total Revenues	—			568,657			48,056			345,602			(23,439		)	938,876
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	—			239,329			7,550			179,828			—			426,707
Selling, general and administrative	79			162,705			3,561			73,821			—			240,166
Intercompany cost of sales	—			6,606			15,736			1,097			(23,439		)	—
Depreciation and amortization	46			76,161			4,238			44,262			—			124,707
(Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net	—			(548		)	2			87			—			(459		)
Total Operating Expenses	125			484,253			31,087			299,095			(23,439		)	791,121
Operating (Loss) Income	(125		)	84,404			16,969			46,507			—			147,755
Interest Expense (Income), Net	42,784			(3,279		)	11,670			34,880			—			86,055
Other Expense (Income), Net	81			2,519			(27		)	(8,937		)	—			(6,364		)
(Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes	(42,990		)	85,164			5,326			20,564			—			68,064
Provision (Benefit) for Income Taxes	—			12,744			(3,488		)	(36		)	—			9,220
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax	(101,115		)	(23,413		)	(157		)	(8,814		)	133,499			—
Income (Loss) from Continuing Operations	58,125			95,833			8,971			29,414			(133,499		)	58,844
Income (Loss) from Discontinued Operations	—			198			—			(535		)	—			(337		)
Net Income (Loss)	58,125			96,031			8,971			28,879			(133,499		)	58,507
Less: Net Income (Loss) Attributable to Noncontrolling Interests	—			—			—			382			—			382
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	58,125		$	96,031		$	8,971		$	28,497		$	(133,499	)	$	58,125
Net Income (Loss)	$	58,125		$	96,031		$	8,971		$	28,879		$	(133,499	)	$	58,507
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustments	(1,072		)	—			635			51,221			—			50,784
Equity in Other Comprehensive Income (Loss) of Subsidiaries	52,406			28,540			287			635			(81,868		)	—
Total Other Comprehensive Income (Loss)	51,334			28,540			922			51,856			(81,868		)	50,784
Comprehensive Income (Loss)	109,459			124,571			9,893			80,735			(215,367		)	109,291
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	—			—			—			(168		)	—			(168		)
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$	109,459		$	124,571		$	9,893		$	80,903		$	(215,367	)	$	109,459

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Continued)



	Three Months Ended March 31, 2018
	Parent			Guarantors			Non- Guarantors			Eliminations			Consolidated
Revenues:
Storage rental	$	—		$	396,476		$	254,673		$	—		$	651,149
Service	—			230,230			161,079			—			391,309
Intercompany revenues	—			1,205			4,491			(5,696		)	—
Total Revenues	—			627,911			420,243			(5,696		)	1,042,458
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	—			246,163			202,558			—			448,721
Selling, general and administrative	43			185,348			84,339			—			269,730
Intercompany cost of sales	—			4,491			1,205			(5,696		)	—
Depreciation and amortization	33			102,446			58,099			—			160,578
(Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net	—			(356		)	(774		)	—			(1,130		)
Total Operating Expenses	76			538,092			345,427			(5,696		)	877,899
Operating Income (Loss)	(76		)	89,819			74,816			—			164,559
Interest Expense (Income), Net	49,941			(1,508		)	49,193			—			97,626
Other Expense (Income), Net	(1,157		)	1,560			19,748			—			20,151
(Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes	(48,860		)	89,767			5,875			—			46,782
Provision (Benefit) for Income Taxes	—			(6,712		)	7,880			—			1,168
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax	(93,544		)	2,865			—			90,679			—
Income (Loss) from Continuing Operations	44,684			93,614			(2,005		)	(90,679		)	45,614
(Loss) Income from Discontinued Operations, Net of Tax	—			(422		)	(40		)	—			(462		)
Net Income (Loss)	44,684			93,192			(2,045		)	(90,679		)	45,152
Less: Net (Loss) Income Attributable to Noncontrolling Interests	—			—			468			—			468
Net Income (Loss) Attributable to Iron Mountain Incorporated	$	44,684		$	93,192		$	(2,513	)	$	(90,679	)	$	44,684
Net Income (Loss)	$	44,684		$	93,192		$	(2,045	)	$	(90,679	)	$	45,152
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustments	(5,635		)	—			37,286			—			31,651
Change in fair value of interest rate swap agreements	(185		)	—			—			—			(185		)
Equity in Other Comprehensive Income (Loss) of Subsidiaries	35,732			38,336			—			(74,068		)	—
Total Other Comprehensive Income (Loss)	29,912			38,336			37,286			(74,068		)	31,466
Comprehensive Income (Loss)	74,596			131,528			35,241			(164,747		)	76,618
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	—			—			2,027			—			2,027
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$	74,596		$	131,528		$	33,214		$	(164,747	)	$	74,591

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS



	Three Months Ended March 31, 2017
	Parent			Guarantors			Canada Company			Non- Guarantors			Eliminations			Consolidated
Cash Flows from Operating Activities:
Cash Flows from Operating Activities—Continuing Operations	$	(41,288	)	$	136,411		$	5,291		$	21,760		$	—		$	122,174
Cash Flows from Operating Activities—Discontinued Operations	—			198			(535		)	—			—			(337		)
Cash Flows from Operating Activities	(41,288		)	136,609			4,756			21,760			—			121,837
Cash Flows from Investing Activities:
Capital expenditures	—			(53,175		)	(2,555		)	(17,472		)	—			(73,202		)
Cash paid for acquisitions, net of cash acquired	—			(6,380		)	—			(5,807		)	—			(12,187		)
Intercompany loans to subsidiaries	(1,187		)	(72,807		)	—			(478		)	74,472			—
Investment in subsidiaries	(16,170		)	—			—			—			16,170			—
Acquisitions of customer relationships and customer inducements	—			(20,653		)	(271		)	(479		)	—			(21,403		)
Net proceeds from Divestments (see Note 10)	—			—			—			2,423			—			2,423
Proceeds from sales of property and equipment and other, net (including real estate)	—			93			2			(29		)	—			66
Cash Flows from Investing Activities—Continuing Operations	(17,357		)	(152,922		)	(2,824		)	(21,842		)	90,642			(104,303		)
Cash Flows from Investing Activities—Discontinued Operations	—			—			—			—			—			—
Cash Flows from Investing Activities	(17,357		)	(152,922		)	(2,824		)	(21,842		)	90,642			(104,303		)
Cash Flows from Financing Activities:
Repayment of revolving credit, term loan facilities and other debt	(31,733		)	(1,495,558		)	(71		)	(1,154,986		)	—			(2,682,348		)
Proceeds from revolving credit, term loan facilities and other debt	94,811			1,423,653			—			1,196,319			—			2,714,783
Debit balances (payments) under cash pools	—			138,693			—			47,129			(185,822		)	—
Debt financing from (repayment to) and equity contribution from (distribution to) noncontrolling interests, net	—			—			—			10,668			—			10,668
Intercompany loans from parent	—			(9,305		)	(12,680		)	96,457			(74,472		)	—
Equity contribution from parent	—			—			—			16,170			(16,170		)	—
Parent cash dividends	(2,060		)	—			—			—			—			(2,060		)
Net (payments) proceeds associated with employee stock-based awards	(4,308		)	—			—			—			—			(4,308		)
Payment of debt financing and stock issuance costs	—			—			(73		)	—			—			(73		)
Cash Flows from Financing Activities—Continuing Operations	56,710			57,483			(12,824		)	211,757			(276,464		)	36,662
Cash Flows from Financing Activities—Discontinued Operations	—			—			—			—			—			—
Cash Flows from Financing Activities	56,710			57,483			(12,824		)	211,757			(276,464		)	36,662
Effect of exchange rates on cash and cash equivalents	—			—			(455		)	5,403			—			4,948
(Decrease) Increase in cash and cash equivalents	(1,935		)	41,170			(11,347		)	217,078			(185,822		)	59,144
Cash and cash equivalents, beginning of period	2,405			23,380			17,110			193,589			—			236,484
Cash and cash equivalents, end of period	$	470		$	64,550		$	5,763		$	410,667		$	(185,822	)	$	295,628

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(6) Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Continued)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)



	Three Months Ended March 31, 2018
	Parent			Guarantors			Non- Guarantors			Eliminations			Consolidated
Cash Flows from Operating Activities:
Cash Flows from Operating Activities—Continuing Operations	$	(66,516	)	$	96,674		$	61,410		$	—		$	91,568
Cash Flows from Operating Activities—Discontinued Operations	—			—			—			—			—
Cash Flows from Operating Activities	(66,516		)	96,674			61,410			—			91,568
Cash Flows from Investing Activities:
Capital expenditures	—			(62,148		)	(33,457		)	—			(95,605		)
Cash paid for acquisitions, net of cash acquired	—			(1,315,549		)	(113,425		)	—			(1,428,974		)
Intercompany loans to subsidiaries	157,737			208,443			—			(366,180		)	—
Investment in subsidiaries	—			—			—			—			—
Acquisitions of customer relationships, customer inducements and data center lease-based intangibles	—			(11,874		)	(6,172		)	—			(18,046		)
Proceeds from sales of property and equipment and other, net (including real estate)	—			(19,466		)	79			—			(19,387		)
Cash Flows from Investing Activities—Continuing Operations	157,737			(1,200,594		)	(152,975		)	(366,180		)	(1,562,012		)
Cash Flows from Investing Activities—Discontinued Operations	—			—			—			—			—
Cash Flows from Investing Activities	157,737			(1,200,594		)	(152,975		)	(366,180		)	(1,562,012		)
Cash Flows from Financing Activities:
Repayment of revolving credit, term loan facilities and other debt	—			(2,308,119		)	(2,102,537		)	—			(4,410,656		)
Proceeds from revolving credit, term loan facilities and other debt	—			3,067,988			2,428,503			—			5,496,491
Debit (payments) balances under cash pools	—			(51,946		)	(11,733		)	63,679			—
Debt financing from (repayment to) and equity contribution from (distribution to) noncontrolling interests, net	—			—			(561		)	—			(561		)
Intercompany loans from parent	—			(154,184		)	(211,996		)	366,180			—
Parent cash dividends	(169,006		)	—			—			—			(169,006		)
Net (payments) proceeds associated with employee stock-based awards	(5,950		)	—			—			—			(5,950		)
Net proceeds associated with the Over-Allotment Option exercise	76,192			—			—			—			76,192
Net proceeds associated with the At the Market (ATM) Program	8,716			—			—			—			8,716
Payment of debt financing and stock issuance costs	(412		)	(9,075		)	(487		)	—			(9,974		)
Cash Flows from Financing Activities—Continuing Operations	(90,460		)	544,664			101,189			429,859			985,252
Cash Flows from Financing Activities—Discontinued Operations	—			—			—			—			—
Cash Flows from Financing Activities	(90,460		)	544,664			101,189			429,859			985,252
Effect of exchange rates on cash and cash equivalents	—			—			1,984			—			1,984
Increase (Decrease) in cash and cash equivalents	761			(559,256		)	11,608			63,679			(483,208		)
Cash and cash equivalents, beginning of period	2,433			634,317			383,675			(94,726		)	925,699
Cash and cash equivalents, end of period	$	3,194		$	75,061		$	395,283		$	(31,047	)	$	442,491

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(7) Segment Information

Our six reportable operating segments as of December 31, 2017 are described in Note 9 to Notes to Consolidated Financial Statements included in our Annual Report and are as follows:


•	North American Records and Information Management Business


•	North American Data Management Business


•	Western European Business


•	Other International Business


•	Global Data Center Business


•	Corporate and Other Business

There have been no changes made to our reportable operating segments since December 31, 2017. All previously reported segment information has been restated to conform to the current presentation and reflects the changes to our reportable operating segments that occurred in fourth quarter of 2017. The operations associated with acquisitions completed during the first three months of 2018 (which are described in Note 4) have been incorporated into our existing reportable operating segments.

An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements is as follows:



	North American Records and Information Management Business		North American Data Management Business		Western European Business		Other International Business		Global Data Center Business		Corporate and Other Business			Total Consolidated
As of and for the Three Months Ended March 31, 2017
Total Revenues	$	507,597	$	100,834	$	120,072	$	189,241	$	6,223	$	14,909		$	938,876
Storage Rental	298,183		68,824		71,567		117,615		5,858		10,232			572,279
Service	209,414		32,010		48,505		71,626		365		4,677			366,597
Depreciation and Amortization	60,535		8,251		14,297		27,676		1,424		12,524			124,707
Depreciation	51,952		6,063		10,888		19,305		1,360		10,024			99,592
Amortization	8,583		2,188		3,409		8,371		64		2,500			25,115
Adjusted EBITDA	209,530		55,270		34,142		55,347		1,506		(63,221		)	292,574
Total Assets(1)	5,016,658		828,760		918,246		2,133,593		186,440		588,437			9,672,134
Expenditures for Segment Assets	51,888		7,906		5,025		18,620		8,895		14,458			106,792
Capital Expenditures	26,578		7,906		4,898		12,467		8,895		12,458			73,202
Cash Paid (Received) for Acquisitions, Net of Cash Acquired	4,379		—		—		5,808		—		2,000			12,187
Acquisitions of Customer Relationships and Customer Inducements	20,931		—		127		345		—		—			21,403
As of and for the Three Months Ended March 31, 2018
Total Revenues	526,843		99,964		136,872		207,970		46,603		24,206			1,042,458
Storage Rental	304,819		69,246		83,952		131,747		45,495		15,890			651,149
Service	222,024		30,718		52,920		76,223		1,108		8,316			391,309
Depreciation and Amortization	62,752		10,104		17,770		31,659		22,268		16,025			160,578
Depreciation	49,138		8,023		12,905		18,917		11,380		13,069			113,432
Amortization	13,614		2,081		4,865		12,742		10,888		2,956			47,146
Adjusted EBITDA	225,738		53,852		44,082		60,631		20,790		(62,078		)	343,015
Total Assets(1)	5,030,238		833,690		929,402		2,429,438		1,875,766		899,615			11,998,149
Expenditures for Segment Assets	43,181		6,853		7,584		32,056		1,438,012		14,939			1,542,625
Capital Expenditures	29,870		6,853		6,151		25,038		13,111		14,582			95,605
Cash Paid (Received) for Acquisitions, Net of Cash Acquired	1,551		—		—		3,208		1,424,215		—			1,428,974
Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs	11,760		—		1,433		3,810		686		357			18,046

________________________________________________________


(1)	Excludes all intercompany receivables or payables and investment in subsidiary balances.

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(7) Segment Information (Continued)

The accounting policies of the reportable segments are the same as those described in Note 2 and in our Annual Report. Adjusted EBITDA for each segment is defined as income (loss) from continuing operations before interest expense, net, provision (benefit) for income taxes, depreciation and amortization, and also excludes certain items that we believe are not indicative of our core operating results, specifically: (i) (gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net; (ii) intangible impairments; (iii) other (income) expense, net; (iv) gain on sale of real estate, net of tax; and (v) Significant Acquisition Costs (as defined below). Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocating resources to, our operating segments.

A reconciliation of Adjusted EBITDA to income (loss) from continuing operations on a consolidated basis is as follows:



	Three Months Ended March 31,
	2017			2018
Adjusted EBITDA	$	292,574		$	343,015
(Add)/Deduct:
Provision (Benefit) for Income Taxes	9,220			1,168
Other (Income) Expense, Net	(6,364		)	20,151
Interest Expense, Net	86,055			97,626
(Gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net	(459		)	(1,130		)
Depreciation and Amortization	124,707			160,578
Significant Acquisition Costs(1)	20,571			19,008
Income (Loss) from Continuing Operations	$	58,844		$	45,614

_______________________________________________________________________________

(1)

Represents operating expenditures associated with (1) the Recall Transaction (as defined in Note 1 in Notes to Consolidated Financial Statements included in our Annual Report), including: (i) advisory and professional fees to complete the Recall Transaction; (ii) costs associated with the Divestments (as defined in Note 10) required in connection with receipt of regulatory approvals (including transitional services); and (iii) costs to integrate Recall Holdings Limited ("Recall") with our existing operations, including moving, severance, facility upgrade, REIT conversion and system upgrade costs, as well as certain costs associated with our shared service center initiative for our finance, human resources and information technology functions; and (2) the advisory and professional fees to complete the IODC Transaction (collectively, "Significant Acquisition Costs").

Table of Contents

IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(8) Commitments and Contingencies

a. Litigation—General

We are involved in litigation from time to time in the ordinary course of business. A portion of the defense and/or settlement costs associated with such litigation is covered by various commercial liability insurance policies purchased by us and, in limited cases, indemnification from third parties. Our policy is to establish reserves for loss contingencies when the losses are both probable and reasonably able to be estimated. We record legal costs associated with loss contingencies as expenses in the period in which they are incurred. The matters described below represent our significant loss contingencies. We have evaluated each matter and, if both probable and reasonably able to be estimated, accrued an amount that represents our estimate of any probable loss associated with such matter. In addition, we have estimated a reasonably possible range for all loss contingencies including those described below. We believe it is reasonably possible that we could incur aggregate losses in addition to amounts currently accrued for all matters up to an additional $21,500 over the next several years, of which certain amounts would be covered by insurance or indemnity arrangements.

b. Italy Fire

On November 4, 2011, we experienced a fire at a facility we leased in Aprilia, Italy. The facility primarily stored archival and inactive business records for local area businesses. Despite quick response by local fire authorities, damage to the building was extensive, and the building and its contents were a total loss. We have been sued by six customers. Four of those lawsuits have been settled and two remain pending, including a claim asserted by Azienda per i Transporti Autoferrotranviari del Comune di Roma, S.p.A, seeking 42,600 Euros for the loss of its current and historical archives. We have also received correspondence from other affected customers, including certain customers demanding payment under various theories of liability. Although our warehouse legal liability insurer has reserved its rights to contest coverage related to certain types of potential claims, we believe we carry adequate insurance. We deny any liability with respect to the fire and we have referred these claims to our warehouse legal liability insurer for an appropriate response. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows. We sold our Italian operations on April 27, 2012, and we indemnified the buyers related to certain obligations and contingencies associated with the fire. As a result of the sale of the Italian operations, any future statement of operations and cash flow impacts related to the fire will be reflected as discontinued operations.

c. Argentina Fire

On February 5, 2014, we experienced a fire at a facility we own in Buenos Aires, Argentina. As a result of the quick response by local fire authorities, the fire was contained before the entire facility was destroyed and all employees were safely evacuated; however, a number of first responders lost their lives, or in some cases, were severely injured. The cause of the fire is currently being investigated. We believe we carry adequate insurance and do not expect that this event will have a material impact to our consolidated financial condition, results of operations or cash flows. Revenues from our operations at this facility represent less than 0.5% of our consolidated revenues.

d. Brooklyn Fire (Recall)

On January 31, 2015, a former Recall leased facility located in Brooklyn, New York was completely destroyed by a fire. Approximately 900,000 cartons of customer records were lost impacting approximately 1,200 customers. No one was injured as a result of the fire. We believe we carry adequate insurance to cover any losses resulting from the fire. There are two pending customer-related lawsuits stemming from the fire, which are being defended by our warehouse legal liability insurer. We have also received correspondence from other customers, under various theories of liability. We deny any liability with respect to the fire and we have referred these claims to our insurer for an appropriate response. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows.

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(8) Commitments and Contingencies (Continued)

e. Roye Fire (Recall)

On January 28, 2002, a former leased Recall records management facility located in Roye, France was destroyed by a fire. Local French authorities conducted an investigation relating to the fire and issued a charge of criminal negligence for non-compliance with security regulations against the Recall entity that leased the facility. We intend to defend this matter vigorously. We are currently corresponding with various customers impacted by the fire who are seeking payment under various theories of liability. There is also pending civil litigation with the owner of the destroyed facility, who is demanding payment for lost rental income and other items. Based on known and expected claims and our expectation of the ultimate outcome of those claims, we believe we carry adequate insurance coverage. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows.

f. Puerto Rico Facility Damage

In September 2017, two of our four facilities in Puerto Rico, one owned and one leased, sustained damage as a result of Hurricane Maria. The leased facility experienced structural damage to a portion of the roof and wall, while the owned facility sustained non-structural damage to a portion of the roof. Both buildings sustained water damage that impacted certain customer records and we are in the process of fully assessing the extent of the damage to our customers’ records at these facilities. We believe we carry adequate insurance coverage for this event and do not believe it will have a material impact to our consolidated financial condition, results of operations or cash flows. Revenues from our operations in Puerto Rico represent less than 0.5% of our consolidated revenues.

(9) Stockholders' Equity Matters

Our board of directors has adopted a dividend policy under which we have paid, and in the future intend to pay, quarterly cash dividends on our common stock. The amount and timing of future dividends will continue to be subject to the approval of our board of directors, in its sole discretion, and to applicable legal requirements.

In fiscal year 2017 and in the first three months of 2018 , our board of directors declared the following dividends:

Declaration Date

Dividend
Per Share

Record Date

Total
Amount

Payment Date

February 15, 2017

0.5500

March 15, 2017

145,235

April 3, 2017

May 24, 2017

0.5500

June 15, 2017

145,417

July 3, 2017

July 27, 2017

0.5500

September 15, 2017

146,772

October 2, 2017

October 24, 2017

0.5875

December 15, 2017

166,319

January 2, 2018

February 14, 2018

0.5875

March 15, 2018

167,969

April 2, 2018

At The Market (ATM) Equity Program

In October 2017, we entered into a distribution agreement (the “Distribution Agreement”) with a syndicate of 10 banks (the “Agents”) pursuant to which we may sell, from time to time, up to an aggregate sales price of $500,000 of our common stock through the Agents (the “At The Market (ATM) Equity Program”). Sales of our common stock made pursuant to the Distribution Agreement may be made in negotiated transactions or transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act, including sales made directly on the New York Stock Exchange, or sales made to or through a market maker other than on an exchange, or as otherwise agreed between the applicable Agent and us. We intend to use the net proceeds from sales of our common stock pursuant to the At The Market (ATM) Equity Program for general corporate purposes, including financing the expansion of our data center business and adjacent businesses through acquisitions, and repaying amounts outstanding from time to time under the Revolving Credit Facility.

During the quarter ended March 31, 2018 under the At The Market (ATM) Equity Program, we sold an aggregate of 273,486 shares of common stock for gross proceeds of approximately $8,800 , generating net proceeds of $8,716 , after deducting commissions of $90 . As of March 31, 2018 the remaining aggregate sale price of shares of our common stock available for distribution under the At The Market (ATM) Equity Program was approximately $431,200 .

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(9) Stockholders' Equity Matters (Continued)

Equity Offering

On December 12, 2017, we entered into an underwriting agreement (the "Underwriting Agreement") with a syndicate of 16 banks (the “Underwriters”) related to the public offering by us of 14,500,000 shares (the “Firm Shares”) of our common stock (the “Equity Offering”). The offering price to the public for the Equity Offering was $37.00 per share, and we agreed to pay the Underwriters an underwriting commission of $1.38195 per share. The net proceeds to us from the Equity Offering, after deducting underwriters' commissions, was $516,462 . At December 31, 2017, the net proceeds of the Equity Offering, together with the net proceeds from the 5 ¹ / ₄ % Notes, were used to temporarily repay borrowings under our Revolving Credit Facility and invest in money market funds.

Pursuant to the Underwriting Agreement, we granted the Underwriters a 30-day option to purchase from us up to an additional 2,175,000 shares of common stock (the “Option Shares”) at the public offering price, less the underwriting commission and less an amount per share equal to any dividends or distributions declared by us and payable on the Firm Shares but not payable on the Option Shares (the “Over-Allotment Option"). On January 10, 2018, the Underwriters exercised the Over-Allotment Option in its entirety. The net proceeds to us from the exercise of the Over-Allotment Option, after deducting underwriters' commissions and the per share value of the dividend we declared on our common stock on October 24, 2017 (for which the record date was December 15, 2017) which was paid on January 2, 2018, was approximately $76,200 . The net proceeds of the Equity Offering and the Over-Allotment Option, together with the net proceeds from the issuance of the 5 ¹ / ₄ % Notes, were used to finance the purchase price of the IODC Transaction, and to pay related fees and expenses.

(10) Divestments

The table below summarizes certain results of operations of the Recall Divestments (as defined in Note 14 to Notes to Consolidated Financial Statements included in our Annual Report) included in discontinued operations for the three months ended March 31, 2017 and 2018:



	Three Months Ended March 31,
Description		2017			2018
(Loss) Income from Discontinued Operations Before (Benefit) Provision for Income Taxes		$	(429	)	$	(496	)
(Benefit) Provision for Income Taxes		(92		)	(34		)
(Loss) Income from Discontinued Operations, Net of Tax		$	(337	)	$	(462	)

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(11) Significant Acquisition Costs

We currently estimate total acquisition and integration expenditures associated with the Recall Transaction and acquisition expenditures associated with the IODC Transaction to be approximately $395,000 , the majority of which is related to the Recall Transaction. From January 1, 2015 through March 31, 2018 , we have incurred cumulative operating and capital expenditures associated with the Recall Transaction and the IODC Transaction of $334,648 , including $282,867 of Significant Acquisition Costs and $51,781 of capital expenditures.

Significant Acquisition Costs included in the accompanying Condensed Consolidated Statements of Operations are as follows:



	Three Months Ended March 31,
	2017		2018
Cost of sales (excluding depreciation and amortization)	$	7,887	$	296
Selling, general and administrative expenses	12,684		18,712
Total Significant Acquisition Costs	$	20,571	$	19,008

Significant Acquisition Costs included in the accompanying Condensed Consolidated Statements of Operations by segment are as follows:



	Three Months Ended March 31,
	2017		2018
North American Records and Information Management Business	$	7,299	$	584
North American Data Management Business	745		—
Western European Business	3,216		2,152
Other International Business	1,651		537
Global Data Center Business	—		10,181
Corporate and Other Business	7,660		5,554
Total Significant Acquisition Costs	$	20,571	$	19,008

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IRON MOUNTAIN INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(11) Significant Acquisition Costs (Continued)

A rollforward of accrued liabilities related to Significant Acquisition Costs on our Condensed Consolidated Balance Sheets as of December 31, 2017 to March 31, 2018 is as follows:



	Accrual for Significant Acquisition Costs
Balance at December 31, 2017	$	12,622
Amounts accrued	1,038
Change in estimates(1)	—
Payments	(5,867		)
Currency translation adjustments	85
Balance at March 31, 2018(2)	$	7,878

_______________________________________________________________________________


(1)	Includes adjustments made to amounts accrued in a prior period.

(2)

Accrued liabilities related to Significant Acquisition Costs as of March 31, 2018 presented in the table above generally related to employee severance costs and onerous lease liabilities associated with the Recall Transaction. We expect that the majority of these liabilities will be paid throughout 2018. Additional Significant Acquisition Costs recorded in our Condensed Consolidated Statement of Operations for the three months ended March 31, 2018 have either been settled in cash during the three months ended March 31, 2018 or are included in our Condensed Consolidated Balance Sheet as of March 31, 2018 as a component of accounts payable.

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IRON MOUNTAIN INCORPORATED

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 months ended March 31, 2018 should be read in conjunction with our Condensed Consolidated Financial Statements and Notes thereto for the three months ended March 31, 2018 , included herein, and our Consolidated Financial Statements and Notes thereto for the year ended December 31, 2017 , included in our Annual Report on Form 10-K filed with the United States Securities and Exchange Commission ("SEC") on February 16, 2018 (our "Annual Report").

FORWARD-LOOKING STATEMENTS

We have made statements in this Quarterly Report on Form 10-Q ("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 operations, economic performance, financial condition, goals, beliefs, future growth strategies, investment objectives, plans and current expectations, such as our (1) commitment to future dividend payments, (2) expected growth of records stored with us from existing customers, (3) expected 2018 consolidated internal storage rental revenue growth rate and capital expenditures, (4) statements made in relation (i) to our acquisition of Recall Holdings Limited ("Recall") pursuant to the Scheme Implementation Deed, as amended, with Recall (the "Recall Transaction") and (ii) our acquisition of IO Data Centers, LLC ("IODC"), including the total acquisition expenditures related to Recall and IODC and the cost to integrate Recall into our existing operations, (5) statements regarding our expectation to reduce our leverage ratio, (6) our ability to close pending acquisitions, (7) expectations regarding the impact of the recent United States tax reform legislation on our consolidated results of operations and (8) expectations regarding the impact of the adoption of ASU 2014-09 (as defined below) on our Adjusted EBITDA, Adjusted EPS and FFO (each as defined below) for the year ending December 31, 2018. These forward-looking statements are subject to various known and unknown risks, uncertainties and other factors. When we use words such as "believes," "expects," "anticipates," "estimates" 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 to remain qualified for taxation as a real estate investment trust for United States federal income tax purposes ("REIT");


•	the adoption of alternative technologies and shifts by our customers to storage of data through non-paper based technologies;


•	changes in customer preferences and demand for our storage and information management services;


•	the cost to comply with current and future laws, regulations and customer demands relating to data security and privacy issues, as well as fire and safety standards;


•	the impact of litigation or disputes that may arise in connection with incidents in which we fail to protect our customers' information;


•	changes in the price for our storage and information management services relative to the cost of providing such storage and information management services;


•	changes in the political and economic environments in the countries in which our international subsidiaries operate and changes in the global political climate;


•	our ability or inability to manage growth, expand internationally, complete acquisitions on satisfactory terms, to close pending acquisitions and to integrate acquired companies efficiently;


•	changes in the amount of our growth and maintenance capital expenditures and our ability to invest according to plan;


•	our ability to comply with our existing debt obligations and restrictions in our debt instruments or to obtain additional financing to meet our working capital needs;


•	the impact of service interruptions or equipment damage and the cost of power on our data center operations;


•	changes in the cost of our debt;


•	the impact of alternative, more attractive investments on dividends;


•	the cost or potential liabilities associated with real estate necessary for our business;


•	the performance of business partners upon whom we depend for technical assistance or management expertise outside the United States; and


•	other trends in competitive or economic conditions affecting our financial condition or results of operations not presently contemplated.

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You should not rely upon forward-looking statements except as statements of our present intentions and of our present expectations, which may or may not occur. You should read these cautionary statements as being applicable to all forward-looking statements wherever they appear. Except as required by law, we undertake no obligation to release publicly the result of any revision to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events. Readers are also urged to carefully review and consider the various disclosures we have made in this Quarterly Report, as well as our other periodic reports filed with the SEC including under "Risk Factors" in our Annual Report.

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 month periods ended March 31, 2018 within each section.

Adoption of ASU 2014-09

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"), which is described in greater detail in Note 2.d. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report. We adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective method, whereby the cumulative effect of applying ASU 2014-09 is recognized at the date of initial application. As a result, the comparative Condensed Consolidated Balance Sheet as of December 31, 2017, and the Condensed Consolidated Statement of Operations, the Condensed Consolidated Statement of Comprehensive Income (Loss), the Condensed Consolidated Statement of Equity and the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2017 have not been restated to reflect the adoption of ASU 2014-09.

As a result of the adoption of ASU 2014-09, Adjusted EBITDA (as defined below) for the three months ended March 31, 2018 increased by approximately $4.0 million compared to the prior year period. The adoption of ASU 2014-09 did not have a material impact on Adjusted EPS, FFO (Nareit) or FFO (Normalized) (each as defined below) for the three months ended March 31, 2018 compared to the prior year period. The revenues for the three months ended March 31, 2018 reflect a net $3.5 million reclassification of certain components of storage rental revenues to service revenues associated with the adoption of ASU 2014-09. We expect our Adjusted EBITDA for the year ending December 31, 2018 to increase by approximately $15.0 million as a result of the adoption of ASU 2014-09.

Significant Acquisitions

a. Recall Acquisition

On May 2, 2016, we completed the Recall Transaction. The results of operations of Recall have been included in our consolidated results from May 2, 2016. See Note 6 to Notes to Consolidated Financial Statements included in our Annual Report for additional information.

b. IO Data Centers Acquisition

On January 10, 2018, we completed the acquisition of the United States operations of IODC, a leading data center colocation space and solutions provider based in Phoenix, Arizona, including the land and buildings associated with four data centers in Phoenix and Scottsdale, Arizona; Edison, New Jersey; and Columbus, Ohio (the "IODC Transaction"). At the closing of the IODC Transaction, we paid approximately $1,347.0 million . In addition to the amount paid at the closing of the IODC Transaction, there is the potential of $35.0 million in additional payments associated with the execution of future customer contracts.

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Significant Acquisition Costs

We currently estimate total acquisition and integration expenditures associated with the Recall Transaction and acquisition expenditures associated with the IODC Transaction to be approximately $395.0 million , the majority of which is expected to be incurred by the end of 2018. This amount consists of (1) operating expenditures associated with the Recall Transaction, including (i) advisory and professional fees to complete the Recall Transaction; (ii) costs associated with the Divestments (as defined in Note 14 to Notes to Consolidated Financial Statements included in our Annual Report) required in connection with receipt of regulatory approvals for the Recall Transaction (including transitional services); and (iii) costs to integrate Recall with our existing operations, including moving, severance, facility upgrade, REIT conversion and system upgrade costs, as well as certain costs associated with our shared service center initiative for our finance, human resources and information technology function and (2) the advisory and professional fees to complete the IODC Transaction (collectively, "Significant Acquisition Costs"). From January 1, 2015 through March 31, 2018 , we have incurred cumulative operating and capital expenditures associated with the Recall Transaction and the IODC Transaction of $334.6 million , including $282.9 million of Significant Acquisition Costs and $51.8 million of capital expenditures.

See Note 11 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for more information on Significant Acquisition Costs, including costs recorded by segment as well as recorded between cost of sales and selling, general and administrative expenses.

Divestments

On May 30, 2017, as disclosed in Note 14 to Notes to Consolidated Financial Statements included in our Annual Report, Iron Mountain EES Holdings Ltd. ("IM EES"), a consolidated subsidiary of ours, sold its records and information management operations in Russia and Ukraine to OSG Records Management (Europe) Limited (“OSG”) in a stock transaction in exchange for a 25% equity interest in OSG (the “Russia and Ukraine Divestment”). We concluded that the Russia and Ukraine Divestment did not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as our decision to divest these businesses did not represent a strategic shift that had a major effect on our operations and financial results. Accordingly, the revenues and expenses associated with these businesses are presented as a component of income (loss) from continuing operations in our Condensed Consolidated Statement of Operations for the three months ended March 31, 2017 and the cash flows associated with these businesses are presented as a component of cash flows from continuing operations in our Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2017.

General

Our revenues consist of storage rental revenues as well as service revenues and are reflected net of sales and value added taxes. Storage rental revenues, which are considered a key driver of financial performance for the storage and information management services industry, consist primarily of recurring periodic rental charges related to the storage of materials or data (generally on a per unit basis) that are typically retained by customers for many years, technology escrow services that protect and manage source code, data backup and storage on our proprietary cloud and revenues associated with our data center operations. Service revenues include charges for related service activities, which include: (1) the handling of records, including the addition of new records, temporary removal of records from storage, refiling of removed records and the destruction of records; (2) courier operations, consisting primarily of the pickup and delivery of records upon customer request; (3) secure shredding of sensitive documents and the related sale of recycled paper, the price of which can fluctuate from period to period; (4) other services, including the scanning, imaging and document conversion services of active and inactive records, or Information Governance and Digital Solutions, which relate to physical and digital records, and project revenues; (5) customer termination and permanent removal fees; (6) data restoration projects; (7) special project work; (8) the storage, assembly, reporting and delivery of customer marketing literature, or fulfillment services; (9) consulting services; (10) cloud-related data protection, preservation, restoration and recovery; and (11) other technology services and product sales (including specially designed storage containers and related supplies). Our service revenue growth has been negatively impacted by declining activity rates as stored records are becoming less active. While customers continue to store their records and tapes with us, they are less likely than they have been in the past to retrieve records for research and other purposes, thereby reducing service activity levels.

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Cost of sales (excluding depreciation and amortization) consists primarily of wages and benefits for field personnel, facility occupancy costs (including rent and utilities), transportation expenses (including vehicle leases and fuel), other product cost of sales and other equipment costs and supplies. Of these, wages and benefits and facility occupancy costs are the most significant. Selling, general and administrative expenses consist primarily of wages and benefits for management, administrative, information technology, sales, account management and marketing personnel, as well as expenses related to communications and data processing, travel, professional fees, bad debts, training, office equipment and supplies. Trends in facility occupancy costs are impacted by the total number of facilities we occupy, the mix of properties we own versus properties we occupy under operating leases, fluctuations in per square foot occupancy costs, and the levels of utilization of these properties. Trends in total wages and benefits in dollars and as a percentage of total consolidated revenue are influenced by changes in headcount and compensation levels, achievement of incentive compensation targets, workforce productivity and variability in costs associated with medical insurance and workers' compensation.

The expansion of our international businesses has impacted the major cost of sales components and selling, general and administrative expenses. Our international operations are more labor intensive relative to revenue than our operations in North America and, therefore, labor costs are a higher percentage of international segment revenue. In addition, the overhead structure of our expanding international operations has generally not achieved the same level of overhead leverage as our North American segments, which may result in an increase in selling, general and administrative expenses as a percentage of consolidated revenue as our international operations become a more meaningful percentage of our consolidated results.

Our depreciation and amortization charges result primarily from the capital-intensive nature of our business. The principal components of depreciation relate to storage systems, which include racking structures, buildings, building and leasehold improvements and computer systems hardware and software. Amortization relates primarily to customer relationship intangible assets and data center in-place leases and tenant relationships. Both depreciation and amortization are impacted by the timing of acquisitions.

Our consolidated revenues and expenses are subject to the net effect of foreign currency translation related to our entities outside the United States. It is difficult to predict the future fluctuations of foreign currency exchange rates and how those fluctuations will impact our Consolidated Statements of Operations. As a result of the relative size of our international operations, these fluctuations may be material on individual balances. Our revenues and expenses from our international operations are generally denominated in the local currency of the country in which they are derived or incurred. Therefore, the impact of currency fluctuations on our operating income and operating margin is partially mitigated. In order to provide a framework for assessing how our underlying businesses performed excluding the effect of foreign currency fluctuations, we compare the percentage change in the results from one period to another period in this report using constant currency presentation. The constant currency growth rates are calculated by translating the 2017 results at the 2018 average exchange rates. Constant currency growth rates are a non-GAAP measure.

The following table is a comparison of underlying average exchange rates of the foreign currencies that had the most significant impact on our United States dollar-reported revenues and expenses:



	Average Exchange Rates for the Three Months Ended March 31,				Percentage Strengthening / (Weakening) of Foreign Currency
	2017		2018
Australian dollar	$	0.758	$	0.786	3.7	%
Brazilian real	$	0.318	$	0.308	(3.1	)%
British pound sterling	$	1.239	$	1.391	12.3	%
Canadian dollar	$	0.756	$	0.791	4.6	%
Euro	$	1.066	$	1.229	15.3	%

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Non-GAAP Measures

Adjusted EBITDA

Adjusted EBITDA is defined as income (loss) from continuing operations before interest expense, net, provision (benefit) for income taxes, depreciation and amortization, and also excludes certain items that we believe are not indicative of our core operating results, specifically: (i) (gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net; (ii) intangible impairments; (iii) other (income) expense, net; (iv) gain on sale of real estate, net of tax; and (v) Significant Acquisition Costs. Adjusted EBITDA Margin is calculated by dividing Adjusted EBITDA by total revenues. We use multiples of current or projected Adjusted EBITDA in conjunction with our discounted cash flow models to determine our estimated overall enterprise valuation and to evaluate acquisition targets. We believe Adjusted EBITDA and Adjusted EBITDA Margin provide our current and potential investors with relevant and useful information regarding our ability to generate cash flow to support business investment. These measures are an integral part of the internal reporting system we use to assess and evaluate the operating performance of our business.

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. Finally, 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, income (loss) from continuing operations, net income (loss) or cash flows from operating activities from continuing operations (as determined in accordance with GAAP).

Reconciliation of Income (Loss) from Continuing Operations to Adjusted EBITDA (in thousands):



	Three Months Ended March 31,
	2017			2018
Income (Loss) from Continuing Operations	$	58,844		$	45,614
Add/(Deduct):
Provision (Benefit) for Income Taxes	9,220			1,168
Other (Income) Expense, Net	(6,364		)	20,151
Interest Expense, Net	86,055			97,626
(Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment (Excluding Real Estate), Net	(459		)	(1,130		)
Depreciation and Amortization	124,707			160,578
Significant Acquisition Costs	20,571			19,008
Adjusted EBITDA	$	292,574		$	343,015

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Adjusted EPS

Adjusted EPS is defined as reported earnings per share fully diluted from continuing operations excluding: (1) (gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net; (2) gain on sale of real estate, net of tax; (3) intangible impairments; (4) other (income) expense, net; (5) Significant Acquisition Costs; and (6) the tax impact of reconciling items and discrete tax items. Adjusted EPS includes income (loss) attributable to noncontrolling interests. 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 Continuing Operations to Adjusted EPS—Fully Diluted from Continuing Operations:



	Three Months Ended March 31,
	2017			2018
Reported EPS—Fully Diluted from Continuing Operations	$	0.22		$	0.16
Add/(Deduct):
Income (Loss) Attributable to Noncontrolling Interests	—			—
Other (Income) Expense, Net	(0.02		)	0.07
(Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment (Excluding Real Estate), Net	—			—
Significant Acquisition Costs	0.08			0.07
Tax Impact of Reconciling Items and Discrete Tax Items(1)	(0.04		)	(0.05		)
Adjusted EPS—Fully Diluted from Continuing Operations(2)	$	0.24		$	0.24

_______________________________________________________________________________

(1)

The difference between our effective tax rate and our structural tax rate (or adjusted effective tax rate) for the three months ended March 31, 2017 and 2018, respectively, is primarily due to (i) the reconciling items above, which impact our reported income (loss) from continuing operations before provision (benefit) for income taxes but have an insignificant impact on our reported provision (benefit) for income taxes and (ii) other discrete tax items. Our structural tax rate for purposes of the calculation of Adjusted EPS for the three months ended March 31, 2017 and 2018 was 23.1% and 19.5%, respectively.


(2)	Columns may not foot due to rounding.

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FFO (Nareit) and FFO (Normalized)

Funds from operations (“FFO”) is defined by the National Association of Real Estate Investment Trusts ("Nareit") and us as net income (loss) excluding depreciation on real estate assets and gain on sale of real estate, net of tax ("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, modifications to FFO (Nareit) are common among REITs as companies seek to provide financial measures that most meaningfully reflect their particular business. Our definition of FFO (Normalized) excludes certain items included in FFO (Nareit) that we believe are not indicative of our core operating results, specifically: (1) (gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net; (2) intangible impairments; (3) other (income) expense, net; (4) Significant Acquisition Costs; (5) the tax impact of reconciling items and discrete tax items; (6) (income) loss from discontinued operations, net of tax; and (7) loss (gain) on sale of discontinued operations, net of tax.

Reconciliation of Net Income (Loss) to FFO (Nareit) and FFO (Normalized) (in thousands):



	Three Months Ended March 31,
	2017			2018
Net Income (Loss)	$	58,507		$	45,152
Add/(Deduct):
Real Estate Depreciation(1)	62,956			72,979
FFO (Nareit)	121,463			118,131
Add/(Deduct):
(Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment (Excluding Real Estate), Net	(459		)	(1,130		)
Other (Income) Expense, Net(2)	(6,364		)	20,151
Significant Acquisition Costs	20,571			19,008
Tax Impact of Reconciling Items and Discrete Tax Items(3)	(9,678		)	(15,379		)
Loss (Income) from Discontinued Operations, Net of Tax(4)	337			462
FFO (Normalized)	$	125,870		$	141,243

_______________________________________________________________________________


(1)	Includes depreciation expense related to real estate assets (land improvements, buildings, building improvements, leasehold improvements and racking).


(2)	Includes foreign currency transaction (gains) losses, net of $(4.2) million and $21.8 million in the three months ended March 31, 2017 and 2018 , respectively. See Note 2.i. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information regarding the components of Other (income) expense, net.

(3)

Represents the tax impact of (i) the reconciling items above, which impact our reported income (loss) from continuing operations 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. Discrete tax items resulted in a (benefit) provision for income taxes of $(8.2) million and $(13.4) million for the three months ended March 31, 2017 and 2018 , respectively.


(4)	Net of tax benefit of $0.1 million and $0.0 million for the three months ended March 31, 2017 and 2018, respectively.

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Critical Accounting Policies

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 policies 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 policies can be found in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report, and the Consolidated Financial Statements and the Notes included therein. We have determined that no material changes concerning our critical accounting policies have occurred since December 31, 2017 , other than the adoption of ASU 2014-09, as described in Note 2.d. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report.

Recent Accounting Pronouncements

See Note 2.m. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for a description of recently issued accounting pronouncements, including those recently adopted.

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Results of Operations

Comparison of three months ended March 31, 2018 to three months ended March 31, 2017 (in thousands):



	Three Months Ended March 31,
	Three Months Ended March 31,						Dollar Change			Percentage Change
	2017			2018			Dollar Change			Percentage Change
Revenues	$	938,876		$	1,042,458		$	103,582		11.0	%
Operating Expenses	791,121			877,899			86,778			11.0	%
Operating Income	147,755			164,559			16,804			11.4	%
Other Expenses, Net	88,911			118,945			30,034			33.8	%
Income from Continuing Operations	58,844			45,614			(13,230		)	(22.5	)%
(Loss) Income from Discontinued Operations, Net of Tax	(337		)	(462		)	(125		)	37.1	%
Net Income	58,507			45,152			(13,355		)	(22.8	)%
Net Income (Loss) Attributable to Noncontrolling Interests	382			468			86			22.5	%
Net Income Attributable to Iron Mountain Incorporated	$	58,125		$	44,684		$	(13,441	)	(23.1	)%
Adjusted EBITDA(1)	$	292,574		$	343,015		$	50,441		17.2	%
Adjusted EBITDA Margin(1)	31.2		%	32.9		%

_______________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.

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REVENUES

Consolidated revenues consists of the following (in thousands):



	Three Months Ended March 31,						Percentage Change
	Three Months Ended March 31,				Dollar Change		Actual		Constant Currency(1)		Internal Growth(2)
	2017		2018		Dollar Change		Actual		Constant Currency(1)		Internal Growth(2)
Storage Rental	$	572,279	$	651,149	$	78,870	13.8	%	10.7	%	3.7	%
Service	366,597		391,309		24,712		6.7	%	3.7	%	1.4	%
Total Revenues	$	938,876	$	1,042,458	$	103,582	11.0	%	8.0	%	2.8	%

_______________________________________________________________________________


(1)	Constant currency growth rates are calculated by translating the 2017 results at the 2018 average exchange rates.


(2)	Our internal 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, foreign currency exchange rate fluctuations and the impact of the adoption of ASU 2014-09. Our internal revenue growth rate includes the impact of acquisitions of customer relationships.

Storage Rental Revenues

In the three months ended March 31, 2018 , the increase in reported consolidated storage rental revenues was driven by the favorable impact of acquisitions/divestitures, consolidated internal storage rental revenue growth and favorable fluctuations in foreign currency exchange rates. The impact of acquisitions/divestitures, net of the impact of the adoption of ASU 2014-09, contributed 7.0% to the reported storage rental revenue growth rates for the three months ended March 31, 2018 compared to the prior year period, primarily driven by recent acquisitions in our Global Data Center Business segment. Internal storage rental revenue growth of 3.7% in the three months ended March 31, 2018 compared to the prior year period was driven by internal storage rental revenue growth of 3.4% in our North American Records and Information Management Business segment, driven by revenue management programs, as well as internal storage rental revenue growth of 1.1% , 2.4% and 5.6% in our North American Data Management Business, Western European Business and Other International Business segments, respectively, primarily driven by volume increases. Excluding the impact of acquisitions/divestitures, global records management net volumes as of March 31, 2018 increased by 0.6% over the ending volume as of March 31, 2017 . Global records management reported net volumes, including acquisitions/divestitures, as of March 31, 2018 increased by 1.1% over the ending volume at March 31, 2017 , supported by volume increases of 1.1% and 5.7% in our Western European Business and Other International Business segments, respectively, partially offset by a volume decrease of 0.8% in our North American Records and Information Management Business segment. Foreign currency exchange rate fluctuations increased our reported storage rental revenue growth rate for the three months ended March 31, 2018 by 3.1%, compared to the prior year period.

Service Revenues

In the three months ended March 31, 2018 , the increase in reported consolidated service revenues was driven by the favorable impact of acquisitions/divestitures, favorable fluctuations in foreign currency exchange rates and internal service revenue growth compared to the three months ended March 31, 2017 . The net impact of acquisitions/divestitures and the adoption of ASU 2014-09 contributed 2.3% to the reported service revenue growth rates for the three months ended March 31, 2018 , compared to the prior year period. Internal service revenue growth of 1.4% for the three months ended March 31, 2018 , compared to the prior year period was primarily driven by increased secured shredding revenues in our North American Records and Information Management Business segment and project activity in our Other International Business segment, partially offset by continued declines in service revenue activity levels in our North American Data Management Business segment, as the storage business becomes more archival in nature, as well as declines in project activity in our Western European Business segment. Foreign currency exchange rate fluctuations increased our reported service revenue growth rate for the three months ended March 31, 2018 by 3.0%, compared to the prior year period.

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Total Revenues

For the reasons stated above, our reported consolidated revenues increased $103.6 million , or 11.0% , to $1,042.5 million for the three months ended March 31, 2018 from $938.9 million for the three months ended March 31, 2017 . The net impact of acquisitions/divestitures contributed 5.6% to the reported consolidated revenue growth rate for the three months ended March 31, 2018 compared to the prior year period, primarily driven by recent acquisitions in our Global Data Center Business segment. Consolidated internal revenue growth was 2.8% in the three months ended March 31, 2018 compared to the prior year period. Foreign currency exchange rate fluctuations increased our reported consolidated revenue growth rate for the three months ended March 31, 2018 by 3.0%, compared to the prior year period.

Internal Growth—Eight-Quarter Trend



	2016						2017								2018
	Second Quarter		Third Quarter		Fourth Quarter		First Quarter		Second Quarter		Third Quarter		Fourth Quarter		First Quarter
Storage Rental Revenue	2.1	%	2.1	%	2.9	%	3.0	%	4.8	%	3.5	%	4.2	%	3.7	%
Service Revenue	(2.1	)%	(1.3	)%	(0.9	)%	0.6	%	(1.1	)%	(0.2	)%	(0.1	)%	1.4	%
Total Revenue	0.4	%	0.8	%	1.4	%	2.0	%	2.5	%	2.0	%	2.5	%	2.8	%

We expect our consolidated internal storage rental revenue growth rate for 2018 to be approximately 3.0% to 3.5%. During the past eight quarters, our internal storage rental revenue growth rate has ranged between 2.1% and 4.8%. Consolidated internal storage rental revenue growth and consolidated total internal revenue growth benefited by approximately 0.8% and 0.5%, respectively, in the second quarter of 2017, from a $4.2 million customer termination fee in our Global Data Center Business segment. Our internal storage rental revenue growth rates have been relatively stable over the past two fiscal years, as internal storage rental revenue growth for full year 2016 and 2017 was 2.3% and 3.9%, respectively. At various points in the economic cycle, internal storage rental revenue growth may be influenced by changes in pricing and volume. In North America, internal storage rental revenue growth in 2017 resulted primarily from price increases in our North American Records and Information Management Business segment as well as internal storage rental revenue growth in our North American Data Management Business segment, although North America volume continued to be flat in 2017 due to us receiving fewer documents from customers. In 2018, we expect this trend of flat to modestly decreasing volume growth to continue with organic growth to come primarily from revenue management programs in our North American Records and Information Management Business and North American Data Management Business segments and volume growth in our Other International Business segment. The internal growth rate for service revenue is inherently more volatile than the internal growth rate for storage rental revenues due to the more discretionary nature of certain services we offer, such as large special projects, and, as a commodity, the volatility of pricing for recycled paper. These revenues, which are often event-driven and impacted to a greater extent by economic downturns as customers defer or cancel the purchase of certain services as a way to reduce their short-term costs, may be difficult to replicate in future periods. The internal growth rate for total service revenues over the past eight quarters reflects reduced retrieval/re-file activity and a related decrease in transportation revenues within our North American Records and Information Management Business and Western European Business segments, as well as continued service declines in service revenue activity levels in our North American Data Management Business segment as the storage business becomes more archival in nature.

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OPERATING EXPENSES

Cost of Sales

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



	Three Months Ended March 31,							Percentage Change				% of Consolidated Revenues				Percentage Change (Favorable)/ Unfavorable
								Percentage Change
					Dollar Change			Actual		Constant Currency
	2017		2018		Dollar Change			Actual		Constant Currency		2017		2018
Labor	$	200,160	$	208,907	$	8,747		4.4	%	1.3	%	21.3	%	20.0	%	(1.3	)%
Facilities	144,253		162,112		17,859			12.4	%	9.3	%	15.4	%	15.6	%	0.2	%
Transportation	35,221		38,273		3,052			8.7	%	6.0	%	3.8	%	3.7	%	(0.1	)%
Product Cost of Sales and Other	39,186		39,133		(53		)	(0.1	)%	(3.3	)%	4.2	%	3.8	%	(0.4	)%
Significant Acquisition Costs	7,887		296		(7,591		)	(96.2	)%	(96.4	)%	0.8	%	—	%	(0.8	)%
Total Cost of Sales	$	426,707	$	448,721	$	22,014		5.2	%	2.2	%	45.4	%	43.0	%	(2.4	)%

Labor

Labor expenses decreased to 20.0% of consolidated revenues in the three months ended March 31, 2018 compared to 21.3% in the three months ended March 31, 2017 . The decrease in labor expenses as a percentage of consolidated revenues was primarily driven by an approximately 100 basis point decrease in labor expenses associated with our North American Records and Information Management Business segment as a percentage of consolidated revenues, primarily associated with wages and benefits growing at a lower rate than revenue, partially attributable to synergies associated with our acquisition of Recall. On a constant dollar basis, labor expenses for the three months ended March 31, 2018 increased by $2.7 million, or 1.3% , compared to the prior year period, primarily driven by recent acquisitions.

Facilities

Facilities expenses increased to 15.6% of consolidated revenues in the three months ended March 31, 2018 compared to 15.4% in the three months ended March 31, 2017 . The 20 basis points increase in facilities expenses as a percentage of consolidated revenues was driven by a 90 basis point increase in facilities expenses, primarily utility costs supporting power generation, in our Global Data Center Business segment resulting from recent acquisitions, partially offset by a 70 basis point decrease in facilities expenses in our North American Records and Information Management Business segment partially attributable to synergies associated with our acquisition of Recall. On a constant dollar basis, facilities expenses for the three months ended March 31, 2018 increased by $13.8 million, or 9.3% , compared to the prior year period, primarily driven by recent acquisitions in our Global Data Center Business segment.

Transportation

Transportation expenses decreased to 3.7% of consolidated revenues in the three months ended March 31, 2018 compared to 3.8% in the three months ended March 31, 2017 . The decrease in transportation expenses as a percentage of consolidated revenues was driven by a decrease in vehicle lease expense, primarily associated with our North American Records and Information Management Business segment. On a constant dollar basis, transportation expenses for the three months ended March 31, 2018 increased by $2.2 million, or 6.0% , compared to the prior year period, primarily driven by increases in third party carrier costs, vehicle insurance and fuel costs.

Product Cost of Sales and Other

Product cost of sales and other, which includes cartons, media and other service, storage and supply costs and is highly correlated to service revenue streams, particularly project revenues, decreased to 3.8% of consolidated revenues for the three months ended March 31, 2018 compared to 4.2% in the three months ended March 31, 2017 . The decrease in product cost of sales and other was driven by special project costs. On a constant dollar basis, product cost of sales and other decreased by $1.3 million, or 3.3% , compared to the prior year period, primarily driven by project costs.

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Significant Acquisition Costs

Significant Acquisition Costs included in cost of sales were $7.9 million and $0.3 million in the three months ended March 31, 2017 and 2018, respectively, and primarily consisted of employee severance costs and facility integration costs associated with the Recall acquisition.

Selling, General and Administrative Expenses

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



	Three Months Ended March 31,							Percentage Change				% of Consolidated Revenues				Percentage Change (Favorable)/ Unfavorable
								Percentage Change
						Dollar Change		Actual		Constant Currency
	2017			2018		Dollar Change		Actual		Constant Currency		2017		2018
General and Administrative	$	134,800		$	136,293	$	1,493	1.1	%	(1.3	)%	14.4	%	13.1	%	(1.3	)%
Sales, Marketing & Account Management	63,306			68,873		5,567		8.8	%	6.0	%	6.7	%	6.6	%	(0.1	)%
Information Technology	31,793			39,504		7,711		24.3	%	21.8	%	3.4	%	3.8	%	0.4	%
Bad Debt Expense	(2,417		)	6,348		8,765		362.6	%	363.8	%	(0.3	)%	0.6	%	0.9	%
Significant Acquisition Costs	12,684			18,712		6,028		47.5	%	43.1	%	1.4	%	1.8	%	0.4	%
Total Selling, General and Administrative Expenses	$	240,166		$	269,730	$	29,564	12.3	%	9.5	%	25.6	%	25.9	%	0.3	%

General and Administrative

General and administrative expenses decreased to 13.1% of consolidated revenues in the three months ended March 31, 2018 compared to 14.4% in the three months ended March 31, 2017 . The decrease in general and administrative expenses as a percentage of consolidated revenues was driven mainly by a decrease in compensation expense, partially attributable to synergies associated with our acquisition of Recall, as well as lower professional fees. On a constant dollar basis, general and administrative expenses for the three months ended March 31, 2018 decreased by $1.9 million, or 1.3% , compared to the prior year period, primarily driven by a decrease in compensation expense, partially attributable to synergies associated with our acquisition of Recall and lower professional fees.

Sales, Marketing & Account Management

S ales, marketing and account management expenses decreased to 6.6% of consolidated revenues in the three months ended March 31, 2018 compared to 6.7% in the three months ended March 31, 2017 . The decrease in sales, marketing and account management expenses as a percentage of consolidated revenues was driven by a decrease in compensation expense, primarily due to the impact of our adoption of ASU 2014-09, related to capitalization of commissions. On a constant dollar basis, sales, marketing and account management expenses for the three months ended March 31, 2018 increased by $3.9 million, or 6.0% , compared to the prior year period, primarily driven by recent acquisitions in our Global Data Center Business segment.

Information Technology

Information technology expenses increased to 3.8% of consolidated revenues in the three months ended March 31, 2018 compared to 3.4% in the three months ended March 31, 2017 . Information technology expenses as a percentage of consolidated revenues reflect an increase in professional fees. On a constant dollar basis, information technology expenses for the three months ended March 31, 2018 increased by $7.1 million, or 21.8% , compared to the prior year period, primarily driven by an increase in professional fees.

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Bad Debt Expense

We maintain an allowance for doubtful accounts that is calculated based on our past loss experience, current and prior trends in our aged receivables, current economic conditions, and specific circumstances of individual receivable balances. We continue to monitor our customers' payment activity and make adjustments based on their financial condition and in light of historical and expected trends. Bad debt expense for the three months ended March 31, 2018 increased by $8.8 million on a constant dollar basis compared to the prior year period, primarily driven by higher bad debt expense associated with our North American Records and Information Management Business segment.

Significant Acquisition Costs

Significant Acquisition Costs included in selling, general and administrative expenses were $12.7 million and $18.7 million in the three months ended March 31, 2017 and 2018, respectively, and primarily consisted of advisory and professional fees, as well as severance costs.

Depreciation and Amortization

Depreciation expense increased $13.9 million, or 13.9%, on a reported dollar basis for the three months ended March 31, 2018 compared to the three months ended March 31, 2017 , primarily due to recent acquisitions in our Global Data Center Business segment. See Note 2.f. to Notes to Consolidated Financial Statements included in our Annual Report for additional information regarding the useful lives over which our property, plant and equipment is depreciated.

Amortization expense increased $22.0 million, or 87.7%, on a reported dollar basis for the three months ended March 31, 2018 compared to the three months ended March 31, 2017 , primarily due to recent acquisitions in our Global Data Center Business segment and, to a lesser extent, the adoption of ASU 2014-09.

OTHER EXPENSES, NET

Interest Expense, Net

Consolidated interest expense, net increased $11.6 million to $97.6 million in the three months ended March 31, 2018 from $86.1 million in the three months ended March 31, 2017 . This increase was a result of higher borrowings during the current year period compared to the prior year period. Our weighted average interest rate was 4.8% and 5.3% at March 31, 2018 and 2017, respectively. See Note 5 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information regarding our indebtedness.

Other (Income) Expense, Net (in thousands)



	Three Months Ended March 31,						Dollar Change
	2017			2018			Dollar Change
Foreign currency transaction (gains) losses, net	$	(4,164	)	$	21,785		$	25,949
Other, net	(2,200		)	(1,634		)	566
	$	(6,364	)	$	20,151		$	26,515

Foreign Currency Transaction (Gains) Losses

We recorded net foreign currency transaction losses of $21.8 million in the three months ended March 31, 2018 , based on period-end exchange rates. These losses resulted primarily from the impact of changes in the exchange rate of each of the British pound sterling and Euro against the United States dollar compared to December 31, 2017 on our intercompany balances with and between certain of our subsidiaries and the Euro Notes (as defined below). These losses were partially offset by gains resulting primarily from the impact of changes in the exchange rate of the Canadian dollar against the United States dollar compared to December 31, 2017 on our intercompany balances with and between certain of our subsidiaries.

We recorded net foreign currency transaction gains of $4.2 million in the three months ended March 31, 2017, based on period-end exchange rates. These gains resulted primarily from the impact of changes in the exchange rate of each of the Brazilian real, Mexican peso and Russian ruble against the United States dollar compared to December 31, 2016 on our intercompany balances with and between certain of our subsidiaries. These gains were partially offset by losses resulting primarily from the impact of changes in the exchange rate of each of the British pound sterling and Euro against the United States dollar compared to December 31, 2016 on our intercompany balances with and between certain of our subsidiaries.

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Provision for Income Taxes

Our effective tax rates for the three months ended March 31, 2017 and 2018 were 13.5% and 2.5%, respectively. The primary reconciling items between the federal statutory tax rate of 35.0% and our overall effective tax rate for the three months ended March 31, 2017 were the benefit derived from the dividends paid deduction, a release of valuation allowances on certain of our foreign net operating losses of $7.5 million as a result of the merger of certain of our foreign subsidiaries and differences in the rates of tax at which our foreign earnings are subject, including foreign exchange gains and losses in different jurisdictions with different tax rates. These benefits were partially offset by the impact of a legislative change enacted in the first quarter of 2017 in the United Kingdom which eliminated the deductibility of certain interest expense and increased our tax provision for the first quarter of 2017 by $1.8 million, or 2.5%. The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three months ended March 31, 2018 were the benefit derived from the dividends paid deduction, a discrete tax benefit of approximately $14.0 million associated with the resolution of a tax matter (as disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report), and the impact of differences in the tax rates at which our foreign earnings are subject including foreign exchange gains and losses in different jurisdictions with different tax rates.

Tax Reform

a. Deemed Repatriation Transition Tax

Our estimate of the amount of Undistributed E&P deemed repatriated under the Tax Reform Legislation in our taxable year ending December 31, 2017 is approximately $186.0 million (the “Estimated Undistributed E&P”). We will opt to include the full amount of Estimated Undistributed E&P in our 2017 taxable income, rather than spread it over eight years (as permitted by the Tax Reform Legislation). Accordingly, included in our REIT taxable income for 2017 was approximately $82.0 million related to the deemed repatriation of Undistributed E&P (the “Deemed Repatriation Taxable Income”). To remain qualified for taxation as a REIT, we are generally required to distribute at least 90% of our REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gains) each year to our stockholders.

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b. Global Intangible Low-Taxed Income

For taxable years beginning after December 31, 2017, the Tax Reform Legislation introduced new provisions intended to prevent the erosion of the United States federal income tax base through the taxation of certain global intangible low-taxed income (“GILTI”). The GILTI provision created a new requirement that certain income earned by controlled foreign corporations (“CFCs”) must be included currently in the gross income of the CFC’s United States tax resident shareholder. Generally, GILTI is the excess of the United States shareholder's pro rata portion of the income of its foreign subsidiaries over the net deemed tangible income return of such subsidiaries.

The GILTI provision also provides for certain deductions against the inclusion of GILTI in taxable income; however, REITs are not eligible for such deductions. Therefore, 100% of our GILTI is included in our taxable income and may increase the required distribution to our stockholders, similar to the Subpart F income inclusion we are subject to today.

We are in the process of developing our estimates of GILTI. It is unclear at this time whether the GILTI inclusion will be considered as qualifying income for the purpose of the REIT gross income tests that we are required to satisfy. The United States Treasury Department and the Internal Revenue Service have authority to issue guidance clarifying that GILTI would be qualifying income and we expect that they will. The timing of such guidance is unclear and there can be no assurance that such guidance will be provided. At this time, we do not expect the GILTI provision will impact our provision for income taxes. However, the GILTI provision may impact the amount and characterization of dividends that we expect to pay in future taxable years.

c. Interest Deduction Limitation

The Tax Reform Legislation also limits, for certain entities, the deduction of net interest expense to the sum of business interest income plus 30% of adjusted taxable income (the “Interest Deduction Limitation”). Adjusted taxable income is defined in the Tax Reform Legislation similar to earnings before interest, taxes, depreciation and amortization ("EBITDA") for taxable years beginning after December 31, 2017 and before January 1, 2022, and is defined similar to earnings before interest and taxes ("EBIT") for taxable years beginning after December 31, 2021.

The Interest Deduction Limitation does not apply to taxpayers that qualify, and make an election, to be treated as a “real property trade or business”. As a REIT, if Iron Mountain Incorporated ("IMI"), including all of our QRSs, were to make an election to be treated as a "real property trade or business", then the interest deduction limitation would not apply. However, IMI would be required to utilize the alternative depreciation system (“ADS”) for its real property. The use of ADS may result in a tax accounting method change, which could require us to pay additional cash taxes in future taxable years. We do not believe our TRSs are eligible for treatment as a "real property trade or business".

If IMI does not elect to be treated as a “real property trade or business”, we will remain subject to the Interest Deduction Limitation and may be limited in the amount of interest expense we can deduct for United States federal income tax purposes beginning in our taxable year ending December 31, 2018. If we are limited in our ability to fully deduct our interest expense for the 2018 taxable year, we will consider making an election to be treated as a "real property trade or business" to avoid such limitation.

INCOME (LOSS) FROM CONTINUING OPERATIONS AND ADJUSTED EBITDA (in thousands)

The following table reflects the effect of the foregoing factors on our consolidated income (loss) from continuing operations and Adjusted EBITDA:



	Three Months Ended March 31,						Dollar Change			Percentage Change
	2017			2018			Dollar Change			Percentage Change
Income from Continuing Operations	$	58,844		$	45,614		$	(13,230	)	(22.5	)%
Income from Continuing Operations as a percentage of Consolidated Revenue	6.3		%	4.4		%
Adjusted EBITDA	$	292,574		$	343,015		$	50,441		17.2	%
Adjusted EBITDA Margin	31.2		%	32.9		%

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(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX

Loss from discontinued operations, net of tax was $0.3 million and $0.5 million for the three months ended March 31, 2017 and 2018, respectively, primarily related to the operations of the Recall Divestments (as defined in Note 14 to Notes to Consolidated Financial Statements included in our Annual Report).

NONCONTROLLING INTERESTS

For the three months ended March 31, 2017 and 2018 , net income attributable to noncontrolling interests resulted in a decrease in net income attributable to IMI of $0.4 million and $0.5 million , respectively. These amounts represent our noncontrolling partners' share of earnings/losses in our majority-owned international subsidiaries that are consolidated in our operating results.

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Segment Analysis (in thousands)

See Note 9 to Notes to Consolidated Financial Statements included in our Annual Report for a description of our reportable operating segments.

North American Records and Information Management Business



	Three Months Ended March 31,								Percentage Change
	Three Months Ended March 31,						Dollar Change		Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change		Actual		Constant Currency		Internal Growth
Storage Rental	$	298,183		$	304,819		$	6,636	2.2	%	1.8	%	3.4	%
Service	209,414			222,024			12,610		6.0	%	5.4	%	1.9	%
Segment Revenue	$	507,597		$	526,843		$	19,246	3.8	%	3.3	%	2.8	%
Segment Adjusted EBITDA(1)	$	209,530		$	225,738		$	16,208
Segment Adjusted EBITDA Margin(1)(2)	41.3		%	42.8		%

_______________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.


(2)	Segment Adjusted EBITDA Margin is calculated by dividing Segment Adjusted EBITDA by total segment revenues.

For the three months ended March 31, 2018 , reported revenue in our North American Records and Information Management Business segment increased 3.8% , compared to the three months ended March 31, 2017 , due to internal revenue growth, the favorable net impact of acquisitions/divestitures (and, to a lesser extent, the adoption of ASU 2014-09) and fluctuations in foreign currency exchange rates. Internal revenue growth of 2.8% in the three months ended March 31, 2018 was primarily the result of (i) internal storage rental revenue growth of 3.4% in the three months ended March 31, 2018 , driven by revenue management programs and (ii) internal service revenue growth of 1.9% in the three months ended March 31, 2018 , driven by growth in secure shredding revenues. The net impact of acquisitions/divestitures and the adoption of ASU 2014-09 contributed 0.5% to the reported revenue growth rates in our North American Records and Information Management Business segment for the three months ended March 31, 2018 , compared to the prior year period. Adjusted EBITDA margin increased 150 basis points during the three months ended March 31, 2018 compared to the three months ended March 31, 2017 , primarily driven by a decrease in wages and benefits as a percentage of segment revenue, partially attributable to synergies associated with our acquisition of Recall.

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North American Data Management Business



	Three Months Ended March 31,									Percentage Change
	Three Months Ended March 31,						Dollar Change			Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change			Actual		Constant Currency		Internal Growth
Storage Rental	$	68,824		$	69,246		$	422		0.6	%	0.3	%	1.1	%
Service	32,010			30,718			(1,292		)	(4.0	)%	(4.4	)%	(6.1	)%
Segment Revenue	$	100,834		$	99,964		$	(870	)	(0.9	)%	(1.2	)%	(1.2	)%
Segment Adjusted EBITDA(1)	$	55,270		$	53,852		$	(1,418	)
Segment Adjusted EBITDA Margin(1)(2)	54.8		%	53.9		%

_______________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.


(2)	Segment Adjusted EBITDA Margin is calculated by dividing Segment Adjusted EBITDA by total segment revenues.

For the three months ended March 31, 2018 , reported revenue in our North American Data Management Business segment decreased 0.9% , compared to the three months ended March 31, 2017 , primarily due to negative internal revenue growth partially offset by favorable fluctuations in foreign currency exchange rates. The negative internal revenue growth for the three months ended March 31, 2018 of 1.2% is primarily attributable to a decline in internal service of 6.1% in the three months ended March 31, 2018 due to continued declines in service revenue activity levels as the business becomes more archival in nature, partially offset by internal storage rental revenue growth of 1.1% in the three months ended March 31, 2018 , primarily attributable to volume increases and the impact of revenue management programs. Adjusted EBITDA margin decreased 90 basis points during the three months ended March 31, 2018 compared to the three months ended March 31, 2017 , primarily associated with investments in product management and development.

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Western European Business



	Three Months Ended March 31,								Percentage Change
	Three Months Ended March 31,						Dollar Change		Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change		Actual		Constant Currency		Internal Growth
Storage Rental	$	71,567		$	83,952		$	12,385	17.3	%	3.4	%	2.4	%
Service	48,505			52,920			4,415		9.1	%	(3.8	)%	(0.4	)%
Segment Revenue	$	120,072		$	136,872		$	16,800	14.0	%	0.5	%	1.3	%
Segment Adjusted EBITDA(1)	$	34,142		$	44,082		$	9,940
Segment Adjusted EBITDA Margin(1)(2)	28.4		%	32.2		%

_______________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.


(2)	Segment Adjusted EBITDA Margin is calculated by dividing Segment Adjusted EBITDA by total segment revenues.

For the three months ended March 31, 2018 , reported revenue in our Western European Business segment increased 14.0% , compared to the three months ended March 31, 2017 , due to favorable fluctuations in foreign currency exchange rates and internal revenue growth. Internal revenue growth for the three months ended March 31, 2018 was 1.3% , primarily attributable to internal storage rental revenue growth of 2.4% for the three months ended March 31, 2018 , primarily associated with volume increases and to a lesser extent, revenue management programs. For the three months ended March 31, 2018 , foreign currency exchange rate fluctuations increased our reported revenues for the Western European Business segment by 13.5%, compared to the prior year period due to the strengthening of the British pound sterling and Euro against the United States dollar. Adjusted EBITDA margin increased 380 basis points during the three months ended March 31, 2018 compared to the three months ended March 31, 2017, primarily driven by wages and benefits, facility costs and transportation expense growing at a lower rate than revenue as a result of synergies associated with our acquisition of Recall.

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Other International Business



	Three Months Ended March 31,								Percentage Change
	Three Months Ended March 31,						Dollar Change		Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change		Actual		Constant Currency		Internal Growth
Storage Rental	$	117,615		$	131,747		$	14,132	12.0	%	7.6	%	5.6	%
Service	71,626			76,223			4,597		6.4	%	2.5	%	4.4	%
Segment Revenue	$	189,241		$	207,970		$	18,729	9.9	%	5.7	%	5.1	%
Segment Adjusted EBITDA(1)	$	55,347		$	60,631		$	5,284
Segment Adjusted EBITDA Margin(1)(2)	29.2		%	29.2		%

_____________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.


(2)	Segment Adjusted EBITDA Margin is calculated by dividing Segment Adjusted EBITDA by total segment revenues.

In the three months ended March 31, 2018 , reported revenue in our Other International Business segment increased 9.9% , compared to the three months ended March 31, 2017, due to internal revenue growth, favorable fluctuations in foreign currency exchange rates and the favorable impact of acquisitions/divestitures. Internal revenue growth for the three months ended March 31, 2018 was 5.1% , supported by 5.6% internal storage rental revenue growth, primarily due to volume increases and 4.4% internal service revenue growth, primarily due to increased project activity. The net impact of acquisitions/divestitures contributed 0.6% to reported revenue growth for the three months ended March 31, 2018 , compared to the prior year period. Foreign currency fluctuations in the three months ended March 31, 2018 resulted in increased revenue, as measured in United States dollars, of approximately 4.2% compared to the prior year period, primarily due to the strengthening of the Australian dollar against the United States dollar. Adjusted EBITDA margin of 29.2% for the three months ended March 31, 2018 were unchanged compared to the three months ended March 31, 2017 , primarily due to compensation growing at a lower rate than revenue, in part due to synergies associated with our acquisition of Recall, offset by increases in facility maintenance cost and bad debt expense.

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Global Data Center Business



	Three Months Ended March 31,								Percentage Change
	Three Months Ended March 31,						Dollar Change		Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change		Actual		Constant Currency		Internal Growth
Storage Rental	$	5,858		$	45,495		$	39,637	676.6	%	676.6	%	28.6	%
Service	365			1,108			743		203.6	%	203.6	%	40.5	%
Segment Revenue	$	6,223		$	46,603		$	40,380	648.9	%	648.9	%	29.3	%
Segment Adjusted EBITDA(1)	$	1,506		$	20,790		$	19,284
Segment Adjusted EBITDA Margin(1)(2)	24.2		%	44.6		%

_____________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.


(2)	Segment Adjusted EBITDA Margin is calculated by dividing Segment Adjusted EBITDA by total segment revenues.

For the three months ended March 31, 2018 , reported revenue in our Global Data Center Business segment increased 648.9% compared to the three months ended March 31, 2017 , due to the favorable impact of acquisitions and internal revenue growth. The impact of acquisitions contributed 619.6% to the reported revenue growth rate in our Global Data Center Business segment for the three months ended March 31, 2018 compared to the prior year period, primarily driven by our acquisitions of IODC in January of 2018 and Mag Datacenters LLC, which operated Fortrust, in the third quarter of 2017. Internal revenue growth for the three months ended March 31, 2018 was 29.3% , supported by 28.6% internal storage rental revenue growth. Adjusted EBITDA margin increased to 44.6% for the three months ended March 31, 2018 compared to 24.2% for the three months ended March 31, 2017 , primarily due to the acquisitions highlighted above.

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Corporate and Other Business



	Three Months Ended March 31,								Percentage Change
	Three Months Ended March 31,						Dollar Change		Actual		Constant Currency		Internal Growth
	2017			2018			Dollar Change		Actual		Constant Currency		Internal Growth
Storage Rental	$	10,232		$	15,890		$	5,658	55.3	%	55.3	%	4.4	%
Service	4,677			8,316			3,639		77.8	%	77.8	%	(0.5	)%
Segment Revenue	$	14,909		$	24,206		$	9,297	62.4	%	62.4	%	2.8	%
Segment Adjusted EBITDA(1)	$	(63,221	)	$	(62,078	)	$	1,143
Segment Adjusted EBITDA(1) as a percentage of Consolidated Revenue	(6.7		)%	(6.0		)%

_______________________________________________________________________________


(1)	See "Non-GAAP Measures—Adjusted EBITDA" in this Quarterly Report for the definitions of Adjusted EBITDA and Adjusted EBITDA Margin, a reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations and a discussion of why we believe these non-GAAP measures provide relevant and useful information to our current and potential investors.

During the three months ended March 31, 2018 , Adjusted EBITDA in the Corporate and Other Business segment as a percentage of consolidated revenues improved 70 basis points compared to the three months ended March 31, 2017 . Adjusted EBITDA in the Corporate and Other Business segment increased $1.1 million in the three months ended March 31, 2018 compared to the three months ended March 31, 2017 , primarily driven by profitability associated with recent acquisitions in our Adjacent Businesses operating segment.

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Liquidity and Capital Resources

The following is a summary of our cash balances and cash flows (in thousands) as of and for the three months ended March 31,



	2017			2018
Cash flows from operating activities - continuing operations	$	122,174		$	91,568
Cash flows from investing activities - continuing operations	(104,303		)	(1,562,012		)
Cash flows from financing activities - continuing operations	36,662			985,252
Cash and cash equivalents at the end of period	295,628			442,491

Net cash provided by operating activities from continuing operations was $91.6 million for the three months ended March 31, 2018 compared to $122.2 million for the three months ended March 31, 2017 . The $30.6 million period over period decrease in cash flows from operating activities resulted from an increase in cash used in working capital of $84.9 million, primarily related to the timing of certain prepaid and accrued expenses, partially offset by an increase in net income (including non-cash charges and realized foreign exchange losses) of $54.3 million.

Our business requires capital expenditures to maintain our ongoing operations, support our expected revenue growth and new products and services, and increase our profitability. These expenditures are included in the cash flows from investing activities. The nature of our capital expenditures has evolved over time along with the nature of our business. Our capital goes to support business-line growth and our ongoing operations, but we also expend capital to support the development and improvement of products and services and projects designed to increase our profitability. These expenditures are generally discretionary in nature. Cash paid for our capital expenditures, acquisition of customer relationships, customer inducements (which consists of permanent withdrawal fees following the adoption of ASU 2014-09) and Contract Fulfillment Costs (as defined in Note 2.d. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report) during the three months ended March 31, 2018 amounted to $95.6 million , $12.6 million , $0.1 million and $5.3 million , respectively. For the three months ended March 31, 2018 , these expenditures were primarily funded with cash flows from operations, as well as through borrowings under our Revolving Credit Facility. Cash paid for acquisitions (net of cash acquired) during the three months ended March 31, 2018 amounted to $1,429.0 million, which were primarily funded by the net proceeds of the 5 ¹ / ₄ % Notes (as defined below) and the net proceeds of the Equity Offering and Over-Allotment Option (both as defined below). Excluding capital expenditures associated with potential future acquisitions, opportunistic real estate investments and capital expenditures associated with the integration of Recall, we expect our capital expenditures on real estate and non-real estate maintenance, as well as non-real estate investment, to be approximately $155.0 million to $165.0 million, our capital expenditures on our data center business to be approximately $185.0 million, and our capital expenditures on real estate investment and innovation to be approximately $150.0 million to $160.0 million in the year ending December 31, 2018 .

Net cash provided by financing activities from continuing operations was $985.3 million for the three months ended March 31, 2018 , consisting primarily of net proceeds of $1,085.8 million associated with our Revolving Credit Facility and Term Loan B (as defined below), net proceeds of $76.2 million associated with the Over-Allotment Option, and net proceeds of $8.7 million associated with the At The Market (ATM) Equity Program (as defined below) partially offset by the payment of dividends in the amount of $169.0 million on our common stock, the payment of $10.0 million for debt financing and equity issuance costs and net payments associated with employee stock-based awards.

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Capital Expenditures

The following table presents our capital spend for the three months ended March 31, 2017 and 2018, respectively, organized by the type of the spending as described in our Annual Report:



	Three Months Ended March 31,
	Three Months Ended March 31,
Nature of Capital Spend (in thousands)	2017			2018
Real Estate:
Investment	$	24,130		$	21,207
Maintenance	8,054			8,999
Total Real Estate Capital Spend	32,184			30,206
Non-Real Estate:
Investment	9,894			8,309
Maintenance	7,243			5,961
Total Non-Real Estate Capital Spend	17,137			14,270
Data Center Investment and Maintenance Capital Spend	19,985			15,196
Innovation and Growth Investment Capital Spend	4,382			2,193
Total Capital Spend (on accrual basis)	73,688			61,865
Net increase (decrease) in prepaid capital expenditures	478			(598		)
Net (increase) decrease in accrued capital expenditures	(964		)	34,338
Total Capital Spend (on cash basis)	$	73,202		$	95,605

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Dividends

See Note 9 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for a listing of dividends that were declared in fiscal year 2017 and the first three months of 2018.

Financial Instruments and Debt

See Note 2.h. to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for information on our financial instruments, including concentrations of credit risk.

Our consolidated debt as of March 31, 2018 is as follows (in thousands):



	March 31, 2018
	Debt (inclusive of discount)			Unamortized Deferred Financing Costs			Carrying Amount
Revolving Credit Facility	$	800,158		$	(13,688	)	$	786,470
Term Loan A	240,625			—			240,625
Term Loan B	698,250			(8,698		)	689,552
Australian Dollar Term Loan (the "AUD Term Loan")	259,431			(3,761		)	255,670
4 ³ / ₈ % Senior Notes due 2021 (the "4 ³ / ₈ % Notes")	500,000			(5,444		)	494,556
6% Senior Notes due 2023 (the "6% Notes due 2023")	600,000			(5,949		)	594,051
5 ³ / ₈ % CAD Senior Notes due 2023 (the "CAD Notes due 2023")	193,826			(3,067		)	190,759
5 ³ / ₄ % Senior Subordinated Notes due 2024 (the "5 ³ / ₄ % Notes")	1,000,000			(8,812		)	991,188
3% Euro Senior Notes due 2025 (the "Euro Notes")	369,711			(4,567		)	365,144
3 ⁷ / ₈ % GBP Senior Notes due 2025 (the "GBP Notes due 2025")	560,516			(7,758		)	552,758
5 ³ / ₈ % Senior Notes due 2026 (the "5 ³ / ₈ % Notes")	250,000			(3,508		)	246,492
4 ⁷ / ₈ % Senior Notes due 2027 (the "4 ⁷ / ₈ % Notes")	1,000,000			(13,509		)	986,491
5 ¹ / ₄ % Senior Notes due 2028 (the "5 ¹ / ₄ % Notes")	825,000			(11,817		)	813,183
Real Estate Mortgages, Capital Leases and Other	630,868			(451		)	630,417
Accounts Receivable Securitization Program	272,273			(321		)	271,952
Mortgage Securitization Program	50,000			(1,237		)	48,763
Total Long-term Debt	8,250,658			(92,587		)	8,158,071
Less Current Portion	(137,198		)	—			(137,198		)
Long-term Debt, Net of Current Portion	$	8,113,460		$	(92,587	)	$	8,020,873

See Note 4 to Notes to Consolidated Financial Statements included in our Annual Report and Note 5 to Notes to Condensed Consolidated Financial Statements included in this Quarterly Report for additional information regarding our long-term debt.

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a. Credit Agreement

On August 21, 2017, we entered into a new credit agreement (as amended, the "Credit Agreement") which amended and restated our then existing credit agreement (the "Former Credit Agreement") which consisted of a revolving credit facility (the "Former Revolving Credit Facility") and a term loan (the "Former Term Loan") and was scheduled to terminate on July 6, 2019. The Credit Agreement consists of a revolving credit facility (the "Revolving Credit Facility") and a term loan (the "Term Loan A"). The maximum amount permitted to be borrowed under the Revolving Credit Facility is $1,750.0 million . The original amount of the Term Loan A was $250.0 million . On March 22, 2018, we entered into an amendment (the “2018 Amendment”) to the Credit Agreement which provided us with the option to request additional commitments of up to $1,260.0 million under the Credit Agreement, in the form of term loans or through increased commitments under the Revolving Credit Facility, subject to the conditions specified in the Credit Agreement, as amended. The Credit Agreement is scheduled to mature on August 21, 2022, at which point all obligations become due.

The Revolving Credit Facility enables IMI and certain of its United States and foreign subsidiaries to borrow in United States dollars and (subject to sublimits) a variety of other currencies (including Canadian dollars, British pounds sterling and Euros, among other currencies) in an aggregate outstanding amount not to exceed $1,750.0 million . The Term Loan A is being paid in quarterly installments in an amount equal to $3.1 million per quarter, with the remaining balance due on August 21, 2022.

IMI and the Guarantors guarantee all obligations under the Credit Agreement. The interest rate on borrowings under the Credit Agreement varies depending on our choice of interest rate and currency options, plus an applicable margin, which varies based on our consolidated leverage ratio. Additionally, the Credit Agreement requires the payment of a commitment fee on the unused portion of the Revolving Credit Facility, which fee ranges from between 0.25% to 0.4% based on our consolidated leverage ratio and fees associated with outstanding letters of credit. As of March 31, 2018, we had $800.2 million and $240.6 million of outstanding borrowings under the Revolving Credit Facility and the Term Loan A, respectively. Of the $800.2 million of outstanding borrowings under the Revolving Credit Facility, $548.0 million was denominated in United States dollars, 179.0 million was denominated in Canadian dollars and 92.0 million was denominated in Euros. In addition, we also had various outstanding letters of credit totaling $54.7 million . The remaining amount available for borrowing under the Revolving Credit Facility as of March 31, 2018, which is based on IMI's leverage ratio, the last 12 months' earnings before interest, taxes, depreciation and amortization and rent expense ("EBITDAR"), other adjustments as defined in the Credit Agreement and current external debt, was $895.2 million (which amount represents the maximum availability as of such date). The average interest rate in effect under the Credit Agreement was 3.3% as of March 31, 2018 . The average interest rate in effect under the Revolving Credit Facility as of March 31, 2018 was 3.3% and ranged from 1.8% to 5.5% as of March 31, 2018 and the interest rate in effect under the Term Loan A as of March 31, 2018 was 3.6% .

On March 22, 2018 in connection with the 2018 Amendment, we entered into an incremental term loan activation notice, or the Activation Notice, with certain lenders pursuant to which the lenders party to the Activation Notice agreed to provide commitments to fund an incremental term loan B in the amount of $700.0 million (the “Term Loan B”). On March 26, 2018, we borrowed the full amount of the Term Loan B, which matures on January 2, 2026. The Term Loan B was issued at 99.75% of par. The aggregate net proceeds of approximately $689.9 million , after paying commissions to the joint lead arrangers and net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility. The Term Loan B holders benefit from the same security and guarantees as other borrowings under the Credit Agreement. The Term Loan B holders also benefit from the same affirmative and negative covenants as other borrowings under the Credit Agreement; however, the Term Loan B holders are not generally entitled to the benefits of the financial covenants under the Credit Agreement.

Principal payments on the Term Loan B are to be paid in quarterly installments of $1.8 million per quarter during the period June 30, 2018 through December 31, 2025, with the balance due on January 2, 2026. The Term Loan B may be prepaid without penalty at any time after the six month anniversary of the borrowing date. The Term Loan B bears interest at a rate of LIBOR plus 1.75%. At March 31, 2018, we had $700.0 million outstanding on the Term Loan B and the interest rate in effect under the Term Loan B was 3.6%. The amount of debt for the Term Loan B reflects an unamortized original issue discount of $1.8 million as of March 31, 2018.

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	December 31, 2017	March 31, 2018	Maximum/Minimum Allowable
Net total lease adjusted leverage ratio	5.0	5.6	Maximum allowable of 6.5
Net secured debt lease adjusted leverage ratio	1.6	2.4	Maximum allowable of 4.0
Bond leverage ratio (not lease adjusted)	5.8	5.8	Maximum allowable of 6.5-7.0(1)(2)
Fixed charge coverage ratio	2.1	2.2	Minimum allowable of 1.5

______________________________________________________________

(1)

(2)

At December 31, 2017, a portion of the net proceeds from the 5 ¹ / ₄ % Notes, together with a portion of the net proceeds of the Equity Offering, were used to temporarily repay approximately $807.0 million of outstanding indebtedness under our Revolving Credit Facility until the closing of the IODC Transaction, which occurred on January 10, 2018. The bond leverage ratio at December 31, 2017 is calculated based on our outstanding indebtedness at this date, which reflects the temporary payment of the Revolving Credit Facility.

Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition and liquidity.

b. Australian Dollar Term Loan

On March 27, 2018, Iron Mountain Australia Group Pty Ltd, a wholly owned subsidiary of IMI, amended its AUD Term Loan (the "AUD Term Loan Amendment") to (i) increase the borrowings under the AUD Term Loan from 250.0 million Australian dollars to 350.0 million Australian dollars; (ii) increase the quarterly principal payments from 6.3 million Australian dollars per year to 8.8 million Australian dollars per year and (iii) decrease the interest rate on the AUD Term Loan from BBSY (an Australian benchmark variable interest rate) plus 4.3% to BBSY plus 3.875%. The AUD Term Loan matures in September 2022. All indebtedness associated with the AUD Term Loan was issued at 99% of par. The net proceeds associated with the AUD Term Loan Amendment of approximately 99.0 million Australian dollars (or approximately $75.6 million , based on the exchange rate between the Australian dollar and the United States dollar on March 29, 2018 (the closing date of the AUD Term Loan Amendment)), net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility.

Principal payments on the AUD Term Loan are to be paid in quarterly installments in an amount equivalent to an aggregate of 8.8 million Australian dollars per year, with the remaining balance due September 22, 2022. The AUD Term Loan is secured by substantially all assets of Iron Mountain Australia Group Pty. Ltd. IMI and its direct and indirect 100% owned United States subsidiaries that represent the substantial majority of its United States operations (the “Guarantors”) guarantee all obligations under the AUD Term Loan. As of March 31, 2018, we had 340.6 million Australian dollars ( $261.7 million based upon the exchange rate between the United States dollar and the Australian dollar as of March 31, 2018 ) outstanding on the AUD Term Loan and the interest rate in effect under the AUD Term Loan was 5.9% . The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $1.5 million and $2.2 million as of December 31, 2017 and March 31, 2018, respectively.

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c. Accounts Receivable Securitization Program

We are a party to a $275.0 million accounts receivable securitization program (the "Accounts Receivable Securitization Program") involving several of our wholly owned subsidiaries and certain financial institutions, which matures on July 30, 2020, at which point all obligations become due.

The maximum availability allowed under the Accounts Receivable Securitization Program is limited by eligible accounts receivable, as defined under the terms of the Accounts Receivable Securitization Program. As of March 31, 2018 , the maximum availability allowed and amount outstanding under the Accounts Receivable Securitization Program was $272.3 million . The interest rate in effect under the Accounts Receivable Securitization Program was 2.9% as of March 31, 2018 .

d. Cash Pooling

As of December 31, 2017, we had a net cash position of approximately $5.7 million in the QRS Cash Pool (which consisted of a gross cash position of approximately $383.7 million less outstanding debit balances of approximately $378.0 million by participating subsidiaries) and we had a zero balance in the TRS Cash Pool (which consisted of a gross cash position of approximately $229.6 million less outstanding debit balances of approximately $229.6 million by participating subsidiaries). As of March 31, 2018, we had a net cash position of approximately $2.6 million in the QRS Cash Pool (which consisted of a gross cash position of approximately $389.2 million less outstanding debit balances of approximately $386.6 million by participating subsidiaries) and we had a $18.9 million balance in the TRS Cash Pool (which consisted of a gross cash position of approximately $262.4 million less outstanding debit balances of approximately $243.5 million by participating subsidiaries). The net cash position balances as of December 31, 2017 and March 31, 2018 are reflected as cash and cash equivalents in the Condensed Consolidated Balance Sheets.

_______________________________________________________________________________

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.

Equity Financings

a. At The Market (ATM) Equity Program

In October 2017, we entered into a distribution agreement (the “Distribution Agreement”) with a syndicate of 10 banks (the “Agents”) pursuant to which we may sell, from time to time, up to an aggregate sales price of $500.0 million of our common stock through the Agents (the “At The Market (ATM) Equity Program”). Sales of our common stock made pursuant to the Distribution Agreement may be made in negotiated transactions or transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act of 1933, as amended, including sales made directly on the New York Stock Exchange, or sales made to or through a market maker other than on an exchange, or as otherwise agreed between the applicable Agent and us. We intend to use the net proceeds from sales of our common stock pursuant to the At The Market (ATM) Equity Program for general corporate purposes, including financing the expansion of our data center business and adjacent businesses through acquisitions, and repaying amounts outstanding from time to time under the Revolving Credit Facility.

During the quarter ended March 31, 2018 under the At The Market (ATM) Equity Program, we sold an aggregate of 273,486 shares of common stock for gross proceeds of approximately $8.8 million , generating net proceeds of $8.7 million , after deducting commissions of $0.1 million . As of March 31, 2018 the remaining aggregate sale price of shares of our common stock available for distribution under the At The Market (ATM) Equity Program was approximately $431.2 million .

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b. Equity Offering

Pursuant to the Underwriting Agreement, we granted the Underwriters a 30-day option to purchase from us up to an additional 2,175,000 shares of common stock (the “Option Shares”) at the public offering price, less the underwriting commission and less an amount per share equal to any dividends or distributions declared by us and payable on the Firm Shares but not payable on the Option Shares (the “Over-Allotment Option"). On January 10, 2018, the Underwriters exercised the Over-Allotment Option in its entirety. The net proceeds to us from the exercise of the Over-Allotment Option, after deducting underwriters' commissions and the per share value of the dividend we declared on our common stock on October 24, 2017 (for which the record date was December 15, 2017) which was paid on January 2, 2018, was approximately $76.2 million . The net proceeds of the Equity Offering and the Over-Allotment Option, together with the net proceeds from the issuance of the 5 ¹ / ₄ % Notes, were used to finance the purchase price of the IODC Transaction, and to pay related fees and expenses.

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Acquisitions

a. Acquisition of IO Data Centers

On January 10, 2018, we completed the IODC Transaction. At the closing of the IODC Transaction, we paid approximately $1,347.0 million . In addition to the amount paid at the closing of the IODC Transaction, there is the potential of $35.0 million in additional payments associated with the execution of future customer contracts.

b. Significant Acquisition Costs

Included in Significant Acquisition Costs are certain costs associated with the Recall Transaction and the IODC Transaction. We currently estimate total acquisition and integration expenditures associated with the Recall Transaction and acquisition expenditures associated with the IODC Transaction to be approximately $395.0 million , the majority of which is related to Recall and the majority of which is expected to be incurred by the end of 2018. This amount consists of (i) Significant Acquisition Costs and (ii) capital expenditures to integrate Recall with our existing operations.

The following table presents the operating and capital expenditures associated with the Recall Transaction and the IODC Transaction incurred for the three months ended March 31, 2017 and 2018 and the cumulative amount incurred through March 31, 2018 (in thousands):



	Year Ended December 31, 2017		Three Months Ended March 31, 2018		Cumulative Total Through March 31, 2018
Significant Acquisition Costs	$	84,901	$	19,008	$	282,867
Recall Capital Expenditures	31,441		1,884		51,781
Total	$	116,342	$	20,892	$	334,648

c. Other Noteworthy 2018 Acquisitions

On March 8, 2018, in order to expand our data center operations into Europe and Asia, we acquired the operations of two data centers in London and Singapore from Credit Suisse International and Credit Suisse AG (together, "Credit Suisse") for the total of (i) 34.6 million British pounds sterling and (ii) 81.0 million Singapore dollars (or collectively, approximately $111.4 million , based upon the exchange rates between the United States dollar and the British pound sterling and Singapore dollar on the closing date of the Credit Suisse transaction) (the “Credit Suisse Transaction”). As part of the Credit Suisse Transaction, Credit Suisse entered into a long-term lease with us to maintain existing data center operations.

In November 2017, we entered into an agreement to acquire (i) the storage and information management assets and operations of Santa Fe Group A/S ("Santa Fe") in China (the “Santa Fe China Transaction”) for approximately 14.0 million Euros and (ii) certain real estate property located in Beijing, China owned by Santa Fe (the “Beijing Property”) for approximately 9.0 million Euros, representing a total purchase price of approximately 23.0 million Euros, subject to customary purchase price adjustments. We closed on the Santa Fe China Transaction on December 29, 2017. The purchase price for the Santa Fe China Transaction was not paid until January 2018 and, therefore, we accrued for the purchase price of the Santa Fe China Transaction (which was approximately $16.8 million , based upon the exchange rate between the Euro and the United States dollar on the closing date of the Santa Fe China Transaction) in our Consolidated Balance Sheet as of December 31, 2017 (the “Accrued Purchase Price”). The Accrued Purchase Price is presented as a component of the current portion of long-term debt in our Consolidated Balance Sheet as of December 31, 2017. We paid the purchase price of the Santa Fe China Transaction on January 3, 2018. We expect to close on the acquisition of the Beijing Property during the first half of 2018. The completion of the acquisition of the Beijing Property is subject to closing conditions; accordingly, we can provide no assurances that we will be able to complete the acquisition of the Beijing Property, that it will not be delayed or that the terms will remain the same.

Contractual Obligations

We expect to meet our cash flow requirements for the next twelve months from cash generated from operations, cash on hand, borrowings under the Credit Agreement and other financings (including the issuance of equity under the At The Market (ATM) Equity Program). We expect to meet our long-term cash flow requirements using the same means described above. We are currently operating above our long-term targeted leverage ratio, primarily as a result of costs incurred to fund the REIT conversion, the Recall Transaction and, more recently, the IODC Transaction. We expect to reduce our leverage ratio over time through effective capital allocation strategies and business growth.

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Inflation

Certain of our expenses, such as wages and benefits, insurance, occupancy costs and equipment repair and replacement, are subject to normal inflationary pressures. Although to date we have been able to offset inflationary cost increases with increased operating efficiencies, the negotiation of favorable long-term real estate leases and an ability to increase prices in our customer contracts (many of which contain provisions for inflationary price escalators), we can give no assurance that we will be able to offset any future inflationary cost increases through similar efficiencies, leases or increased storage rental or service charges.

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 March 31, 2018 (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.

As part of our shared service center initiative, we are centralizing certain finance, human resources and IT functions. Since July 1, 2017, we have implemented significant steps in this plan related to certain accounting, accounts payable, payroll and IT support functions. We have and will continue to align the design and operation of our financial control environment as part of the shared service center initiative.

There have been no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) under the Securities Act of 1934) during the quarter ended March 31, 2018 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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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 March 31, 2018 , nor did we repurchase any shares of our common stock during the three months ended March 31, 2018 .

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Item 6. Exhibits

(a) Exhibits

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



Exhibit No.			Description

10.1			Second Amendment, dated as of March 22, 2018, to Credit Agreement, dated as of June 27, 2011, as amended and restated as of August 21, 2017, among the Company, IMIM, certain other subsidiaries of the Company party thereto, the lenders and other financial institutions party thereto, JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian Administrative Agent, and JPMorgan Chase Bank, N.A., as Administrative Agent. ( Incorporated by reference to the Company’s Current Report on Form 8-K dated March 22, 2018. )
10.2			Incremental Term Loan Activation Notice, dated as of March 22, 2018, among IMIM and the lenders party thereto. (Incorporated by reference to the Company’s Current Report on Form 8-K dated March 22, 2018.)
10.3			Separation Agreement, dated October 5, 2017, between the Company and Eileen Sweeney. (Filed herewith.)
12			Statement: re Computation of Ratios. (Filed herewith.)
31.1			Rule 13a-14(a) Certification of Chief Executive Officer. (Filed herewith.)
31.2			Rule 13a-14(a) Certification of Chief Financial Officer. (Filed herewith.)
32.1			Section 1350 Certification of Chief Executive Officer. (Furnished herewith.)
32.2			Section 1350 Certification of Chief Financial Officer. (Furnished herewith.)
101.1			The following materials from Iron Mountain Incorporated's Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, formatted in XBRL (eXtensible Business Reporting Language): (i) the Condensed Consolidated Balance Sheets, (ii) Condensed Consolidated Statements of Operations, (iii) Condensed Consolidated Statements of Comprehensive Income (Loss), (iv) Condensed Consolidated Statements of Equity, (v) Condensed Consolidated Statements of Cash Flows and (vi) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and in detail. (Filed herewith.)

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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: April 26, 2018

EXHIBIT 10.3

October 25, 2017

Eileen Sweeney

Dear Eileen:

This Separation Agreement and Release (“Agreement”) sets forth the pay and benefits for which you are eligible in connection with your separation from employment with Iron Mountain and supersedes Iron Mountain’s offer dated October 5, 2017.

If you choose not to accept this Agreement, you need not take any action. You will be paid all earned wages, including accrued unused vacation in accordance with Iron Mountain policy, through your Termination Date.

For purposes of this Agreement, Iron Mountain shall include Iron Mountain Incorporated and its subsidiary and affiliated companies (collectively “Iron Mountain” or the “Company”).

1 . Effective Termination Date . Your employment with Iron Mountain will terminate on October 5, 2017 (“Termination Date”).

2 . Payments .


(a)	Severance Pay.

Iron Mountain will provide you with pay continuation for 39 weeks calculated at your current base compensation rate and paid biweekly on Iron Mountain's regularly scheduled payroll dates. Your first payment will be retroactive to your Termination Date (conditioned upon your signing this Agreement and your not exercising your right of rescission under Paragraph 18(e)) and will occur in Iron Mountain’s regular payroll for the first payroll cycle after expiration of the Rescission Period set forth in Paragraph 18(e) of this Agreement.


(b)	Incentive Compensation.

Employees eligible for an annual incentive compensation (“IC”) bonus for fiscal year 2017, and whose Termination Date occurs between July 1, 2017 to December 31, 2017, will receive an IC payment on or prior to March 15, 2018 prorated based on the eligible incentive opportunity through their Termination Date. Thus, your pro rata IC bonus payment will be based upon your employment from January 1, 2017 through and until October 5, 2017. The IC payment will be determined under the SET bonus program. To apply the proration, Iron Mountain will calculate your prorated salary from January 1, 2017 through your Termination Date of October 5, 2017. The bonus will then reflect actual performance against the SET bonus goals based upon your prorated salary. In addition, the final payout will reflect an individual modifier of 0%, i.e., no increase or decrease from the calculated team result for individual performance.

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(c)	Withholdings and Deductions. The Company will withhold from the payment(s) under this Paragraph 2 applicable tax withholdings and authorized deductions.

3. Authorized Deductions.


(a)	You hereby authorize the Company to deduct from the severance payments(s), to the fullest extent permissible by law, including but not limited to (i) undocumented and unauthorized travel and expense reimbursement; (ii) negative vacation balance or overpayment of compensation; and (iii) any unpaid balance on your corporate American Express Card.


(b)	You agree to provide the Company, within 30 days of your Termination Date, all travel and expense related documentation for which you have received or are seeking reimbursement.

4 . Benefits .


(a)	Termination of Benefits. Except as specifically provided herein, all Company benefits will terminate on your Termination Date.

(b)

COBRA. You may elect to continue your health and dental coverage at your own expense for up to 18 months from your Termination Date pursuant to the Comprehensive Omnibus Budget Reconciliation Act (“COBRA”). Information about COBRA coverage will be sent by the Company’s COBRA third party administrator to your home address on record in Iron Mountain’s Human Resource Information System. The Company will contribute towards your COBRA costs until 7/5/18 in the amount of the Company contributions for medical and dental coverage when you were actively employed.


(c)	Benefits after Termination. Certain Company benefits such as our life insurance may be converted into an individual policy of insurance at your own expense. Please see memo titled “When You Leave Iron Mountain” for additional information regarding the treatment of your benefits following termination.


(d)	Equity Grants . Notwithstanding anything to the contrary in the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan or the Iron Mountain Incorporated 2002 Stock Incentive Plan, any agreements thereunder, or amendments to either, the following treatment shall apply to your Iron Mountain equity grants:

(i) Your outstanding grants of Restricted Stock Units (“RSUs”) and stock options shall be credited with an additional 39 weeks of vesting service and will accelerate after expiration of the Rescission Period set forth in Paragraph 18(e) of this Agreement. You will have 60 days from your Termination Date to exercise any vested stock options.

(ii) With respect to any outstanding Performance Units that are earned based on the performance criteria and performance period applicable to the award, you will be entitled to the following:



Year of Grant
2017 Grant	33.3% of the PUs
2016 Grant	66.6% of the PUs
2015 Grant	100% of the PUs

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In no event, however, will the applicable Performance Unit settle earlier than the original date provided pursuant to the applicable Performance Unit Agreement. In no event will any Performance Units that have not been earned in accordance with the terms of the award or this Agreement be delivered.

5. Unemployment Compensation . Eligibility for state unemployment compensation benefits is determined by applicable state law.

6. Outplacement Assistance . Iron Mountain will pay for three (3) final sessions for you with your current Korn Ferry executive coach. Invoices for those sessions are to be sent directly to the attention of Iron Mountain’s EVP & Chief People Officer.

7. Future Employment . By entering into this Agreement, you acknowledge and agree that you are waiving any rights to reinstatement or rehire with the Company. If you are rehired by Iron Mountain, you will be treated as a new hire for purposes of any future severance or transition pay.

8 . Release of Claims .

(a)

In exchange for the promises and payments described in this Agreement, you (on behalf of yourself and your heirs, executors, administrators and assigns) hereby release and forever discharge Iron Mountain Incorporated, its subsidiaries, divisions, and affiliated entities, and all of their respective present and former officers, directors, shareholders, trustees, employees, agents, representatives, consultants, predecessors, successors and assigns, in their official and individual capacities (collectively, the “Released Parties”), from any and all claims, demands, causes of action, legal disputes, liabilities or damages of any nature whatsoever, both in law and equity, which you have had, now have, or may have in the future, against the Released Parties, whether or not either known to you now or discovered by you hereafter (collectively referred to as “Claims”).

(b)

Scope of Claims Release. This general Release of Claims includes, without limitation, all Claims relating to your employment and termination of employment with the Company, the Company’s employment and business practices, the compensation and benefits provided to you by the Company, all contract and tort Claims, all Claims for reinstatement, severance pay, attorney’s fees or costs, all Claims for retaliation of any kind, All Claims under Title VII of the Civil Rights Act of 1964, the Americans With Disabilities Act, the Age Discrimination in Employment Act (“ADEA”), the Older Workers Benefit Protection Act of 1990, 29 U.S.C. § 626(f) (“OWBPA”), the Family and Medical Leave Act, the Worker Adjustment Retraining and Notification Act (“WARN”), and any amendments to the foregoing statutes, and any other federal, state or local statute, regulation, ordinance or common law creating employment-related causes of action, and all claims related to or arising out of your employment or the termination of your employment with Iron Mountain.

(c)

Claims Excluded From Release. Notwithstanding anything to the contrary contained elsewhere in this Agreement, this Release of Claims does not include and will not preclude (i) claims under the Employee Retirement Income Security Act of 1974, as amended (29 U.S.C. et seq. ) for vested benefits under the Iron Mountain 401(k) plan, or any other qualified retirement plan; (ii) claims for benefits under state workers’ compensation statutes; (iii) claims under the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”); (iv) claims, actions , or rights arising under or to enforce the terms of this Agreement; and (v) any claim that cannot be released under applicable law.

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(d)

Full Satisfaction. You agree to accept the provision set forth in this Agreement in full satisfaction of all Claims, including but not limited to all claims for compensation or benefits, which you may have against the Released Parties. Except as otherwise set forth in this Agreement, you agree that the Company has fully satisfied any and all obligations whatsoever owed to you arising out of your employment with the Company. The parties agree that this provision is intended to release the Released Parties from any and all liability to the fullest extent permitted by law.

(e)

( For California employees only.) You expressly waive and release any and all rights and benefits under Section 1542 of the Civil Code of the State of California , which reads as follows: “A general release does not extend to claims which the creditor [Employee] does not know or suspect to exist in his or her factor at the time of executing the release, which, if know by him or her, must have materially affected his or her settlement with the debtor [Employer].”

( For Massachusetts employees only .) You specifically agree to waive the provisions of the Massachusetts Wage Act, M.G.L. c. 149 and in so doing you explicitly waive any claims for unpaid wages.

(f)

You agree and represent that no complaint, lawsuit or investigation has been brought, filed or initiated by you, or by any agent or representative on your behalf, in any local, state or federal court or governmental agency. You hereby agree that neither you nor any representative or agent will ever assert in any forum any claim as to which this release of claims may lawfully be applied. You hereby agree, to the fullest extent permitted by law, that you will not join, assist or voluntarily participate in any lawsuit or class action brought or filed against the Released Parties. Nothing in this Agreement, including this Paragraph 8 (“Release of Claims”) and Paragraph 11 (“Confidentiality/Non-Disparagement/Cooperation”), restricts or prohibits you from communicating with, providing testimony before, providing confidential information to, or filing or cooperating in a claim or investigation directly with a self-regulatory authority or a government agency or entity (without the need to seek the Company’s prior approval), including the U.S. Equal Employment Opportunity Commission, the Department of Labor, the National Labor Relations Board, the Department of Justice, the Securities and Exchange Commission, the Congress, and any agency Inspector General (collectively, the “Regulators”) or from making other disclosures that are protected under the whistleblower provisions of state or federal law or regulation or receiving an award from any Regulator that provides awards for providing information. However, to the maximum extent permitted by law, you are waiving your right to receive any individual monetary relief from the Released Parties resulting from such claims.

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9 . Iron Mountain Employee Confidentiality, Non-Competition, Non-Solicitation and Assignment of Inventions Agreement . You hereby acknowledge and affirm your continuing obligations under the Iron Mountain Employee Confidentiality, Non-Competition, Non-Solicitation and Assignment of Inventions Agreement, or such similar agreement signed by you as a condition of your employment with Iron Mountain that protects the company’s confidential information, intellectual property and customer relationship (collectively referred to as “Employee Agreement”). Notwithstanding the foregoing, the non-competition period set forth in Section 3 of the Employee Agreement is reduced from two years to one year. The Employee Agreement shall continue in full force and effect and is incorporated into this Agreement by reference. Except as specifically provided herein there are no other changes to the Employee Agreement including but not limited to the two year non-solicitation restrictions set forth in Section 4 of the Employee Agreement. You acknowledge that your continued compliance with the Employee Agreement (as specifically modified in this Paragraph 9) is a condition of your receiving the severance payments and benefits provided in this Agreement. If there is a specific employment opportunity that you are considering, you can request an exception to Section 3 (as specifically modified herein) in an email to the attention of Iron Mountain’s EVP and Chief People Officer. Any exception to Employee Agreement must be agreed to in writing by Iron Mountain’s EVP and Chief People Officer, who will endeavor to respond within 10 business days of receipt of your email.

10 . Return of Property . All equipment, documents and materials provided to you during your employment with Iron Mountain are the sole property of Iron Mountain. You agree to return to Iron Mountain all such property within your possession or control, including, but not limited to, laptop and related devices, phone, credit cards, customer and vendor records and other documents and materials, whether hard copy or electronic form, and all copies thereof, and all other property belonging to Iron Mountain no later than the Termination Date. You further agree to provide any passwords or security codes necessary for Iron Mountain to access the above materials no later than your Termination Date. By signing this Agreement, you hereby acknowledge that you have complied with the obligations under this Paragraph 10.

11 . Confidentiality/Non-Disparagement/Cooperation .

Except as required by law and as otherwise provided in Paragraph 8(f) and this Paragraph 11, you agree:

(a)

You will not disclose this Agreement and its terms, or the facts and circumstances leading to any Claims as defined by Paragraph 8(a) of this Agreement, to any person, firm or entity, except to your spouse, accountant(s), financial planner(s) and attorney(s), and to them only if they agree to keep this Agreement and its terms confidential. Nothing herein is intended to preclude you from (i) reporting alleged violations of law to governmental agencies to the extent that such laws prohibit such restrictions; or (ii) disclosing this Agreement to your state unemployment office.

(b)

You will not disparage the Company, its management, products, business practices or strategy. The obligation of non-disparagement set forth in this Paragraph 11(b) includes disparagement in any form or forum, including but not limited to any print or electronic media, social networking site, blog, tweet, website, and statements to or in the press including any trade press. You are permitted to provide truthful information in response to a legal subpoena or other legal process.

(c)

You will cooperate with the Company and its legal counsel in connection with any current or future litigation, investigation or other legal matters involving the Company about which you have knowledge or information and to make yourself available at mutually convenient times and reasonable locations. The Company will reimburse you for reasonable travel expenses incurred by you as a result of, and directly related to, your cooperation. Your obligation to cooperate shall continue after your Termination Date.

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12 . Remedies . If you breach any term of this Agreement, Iron Mountain may commence legal action and pursue its available legal and equitable remedies, including, but not limited to, suspending and recovering any and all payments and benefits made or to be made under this Agreement. In the event of your breach of any term of this Agreement, you will be responsible for Iron Mountain’s costs incurred, including attorneys’ fees, in enforcing its rights under this Agreement.

13 . Successors and Assigns . The rights and obligations of this Agreement shall inure to the benefit of the successors and assigns of Iron Mountain. This Agreement may not be assigned by you.

14 . Enforceability; Severability . If a court finds any term of this Agreement to be invalid or unenforceable, the parties agree that the court shall modify such term to make it enforceable to the maximum extent possible. The invalidity or unenforceability of any provision of this Agreement shall in no way affect the validity or enforceability of any other provisions, or any part, hereof.

15 . Law Governing; Jurisdiction . This Agreement shall be governed and construed in accordance with the laws of the Commonwealth of Massachusetts without regard to conflict of laws principles. You agree that all disputes arising under or out of this Agreement shall be brought in a court of competent jurisdiction within the Commonwealth of Massachusetts and you hereby consent to exclusive jurisdiction in such court with respect to all such disputes.

16 . Entire Agreement; No Representations . This Agreement constitutes the entire agreement between you and Iron Mountain concerning the terms and conditions of your separation from employment with Iron Mountain and supersedes all prior and contemporaneous agreements, understandings, negotiations and discussions, whether oral or written, between you and Iron Mountain, except as otherwise specifically referenced herein. You agree that Iron Mountain has not made any representations or promises to you regarding the meaning or implication of any provision of this Agreement other than as stated herein.

17 . Modification and Waiver . This Agreement may be amended or modified only by a written instrument signed by you and an authorized representative of Iron Mountain. The failure of you or Iron Mountain at any time to require the performance of any provision of this Agreement shall in no manner affect the right of such party at a later time to enforce the same provision.

18 . Knowing and Voluntary Waiver of Legal Claims . Because you are waiving certain legal claims against Iron Mountain under Section 8 of this Agreement in exchange for the receipt of the compensation and benefits set forth in this Agreement, you acknowledge and agree that:


a)	This waiver is part of the Agreement between yourself and the Company, and it is written in a manner that you understand;


(a)	In signing this Agreement, you are not waiving rights or claims that may arise after the date that this Agreement becomes effective;


(b)	You have the right to review this Agreement with an attorney before signing the Agreement, and you have voluntarily chosen whether or not to consult with counsel before signing the Agreement;


(c)	You may take up to 21 days to review this Agreement before you decide to sign the Agreement, and if you sign the Agreement before the end of that 21-day period, you have intentionally waived the remainder of this review period.

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(d)

Should you choose to execute this Agreement, you have an additional period of 7 days from the date of execution to change your decision to enter into the Agreement and rescind your signature (the “Rescission Period”). This Agreement shall not become enforceable until this Rescission Period has expired. If you choose to rescind the Agreement you must deliver a written and signed notice of your rescission to: Iron Mountain, Attn: Payroll – 1000 Campus Drive, Collegeville, PA 19426.


(e)	By signing this Agreement, you acknowledge that you have read this Agreement, that you fully understand its terms, and that you have entered into this Agreement knowingly and voluntarily .

Please indicate your acceptance of this Agreement by signing and dating both copies in the space provided below and returning one copy in the enclosed envelope to: Iron Mountain, Attn: Payroll – 1000 Campus Drive, Collegeville, PA 19426 on or before November 2, 2017 Please keep the other copy for your records.

Note: This Agreement should not be signed by you prior to your Termination Date.

Very truly yours,

Deirdre Evens

EVP, Chief People Officer

ACCEPTED AND AGREED:

________________________________ Date: _____________________

Eileen Sweeney

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EXHIBIT 12

IRON MOUNTAIN INCORPORATED

STATEMENT OF THE CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in thousands)



																	Three Months Ended
		Year Ended December 31,															March 31,
		2013			2014			2015			2016			2017			2017			2018

Earnings:
	Income from Continuing Operations before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate	$	159,871		$	223,373		$	162,066		$	146,644		$	216,105		$	68,064		$	46,782
	Add:
	Gain on Sale of Real Estate (1)	1,847			10,512			1,059			2,310			1,565			—			—
	Fixed Charges	335,637			345,781			344,606			417,774			470,376			116,077			127,988
		$	497,355		$	579,666		$	507,731		$	566,728		$	688,046		$	184,141		$	174,770

Fixed Charges:
	Interest Expense, Net	$	254,174		$	260,717		$	263,871		$	310,662		$	353,575		$	86,055		$	97,626
	Interest Portion of Rent Expense	81,463			85,064			80,735			107,112			116,801			30,022			30,362
		$	335,637		$	345,781		$	344,606		$	417,774		$	470,376		$	116,077		$	127,988

Ratio of Earnings to Fixed Charges		1.5		x	1.7		x	1.5		x	1.4		x	1.5		x	1.6		x	1.4		x

(1) Gain on sale of real estate reported above are pre-tax. The tax associated with the gain on the sale of real estate for the years ended December 31, 2013, 2014, 2015, 2016 and 2017 and for the three months ended March 31, 2017 and 2018 was $430, $2,205, $209, $130, $0, $0 and $0, respectively.

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: April 26, 2018



		/s/ WILLIAM L. MEANEY
		William L. Meaney
		President and Chief Executive Officer

EXHIBIT 31.2

CERTIFICATIONS

I, Stuart B. Brown, 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: April 26, 2018



		/s/ STUART B. BROWN
		Stuart B. Brown
		Executive Vice President and Chief Financial Officer

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 March 31, 2018 (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: April 26, 2018



		/s/ WILLIAM L. MEANEY
		William L. Meaney
		President and Chief Executive Officer

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 March 31, 2018 (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: April 26, 2018



		/s/ STUART B. BROWN
		Stuart B. Brown
		Executive Vice President and Chief Financial Officer