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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10Q

Commission file number 1-13045

IRON MOUNTAIN INCORPORATED
(Exact Name of Registrant as Specified in its Charter)

        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 is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act). Yes ý    No o

        Number of shares of the registrant's Common Stock at May 2, 2005: 130,353,399

IRON MOUNTAIN INCORPORATED
Index

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Part I. Financial Information

Item 1. Unaudited Consolidated Financial Statements

IRON MOUNTAIN INCORPORATED

CONSOLIDATED BALANCE SHEETS

(In Thousands, except Share and Per Share Data)

(Unaudited)

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

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IRON MOUNTAIN INCORPORATED

CONSOLIDATED STATEMENTS OF OPERATIONS

(In Thousands, except Per Share Data)

(Unaudited)

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

4

IRON MOUNTAIN INCORPORATED

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In Thousands)

(Unaudited)

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

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IRON MOUNTAIN INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(In Thousands, Except Share and Per Share Data)

(Unaudited)

(1) General

        The interim consolidated financial statements are presented herein without audit and, in the opinion of management, reflect all adjustments of a normal recurring nature necessary for a fair presentation. Interim results are not necessarily indicative of results for a full year.

        The consolidated balance sheet presented as of December 31, 2004 has been derived from the consolidated financial statements that have been audited by our independent auditors. The unaudited consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("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 ("GAAP") have been omitted pursuant to those rules and regulations, but we believe that the disclosures are adequate to make the information presented not misleading. The consolidated financial statements and notes included herein should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2004.

        On May 27, 2004, the Board of Directors of Iron Mountain Incorporated (the "Company" or "IMI") authorized and approved a three-for-two stock split effected in the form of a dividend on the Company's common stock. Such additional shares of common stock were issued on June 30, 2004 to all shareholders of record as of the close of business on June 15, 2004. All share and per share amounts have been restated to reflect the stock split.

(2) Summary of Significant Accounting Policies

a.

Principles of Consolidation

        The accompanying financial statements reflect our financial position and results of operations on a consolidated basis. Financial position and results of operations of Iron Mountain Europe Limited ("IME"), our European subsidiary, are consolidated for the appropriate periods based on its fiscal year ended October 31. All significant intercompany account balances have been eliminated or presented to reflect the underlying economics of the transactions.

b.

Foreign Currency Translation

        Local currencies are considered the functional currencies for most of our operations outside the United States. All assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated at average exchange rates for the applicable period, in accordance with Statement of Financial Accounting Standards ("SFAS") No. 52, "Foreign Currency Translation." Resulting translation adjustments are reflected in the accumulated other comprehensive items component of shareholders' equity. The gain or loss on foreign currency transactions, including those related to (a) U.S. dollar denominated 8¹/8% senior notes of our Canadian subsidiary (the "Subsidiary notes"), (b) our 7¹/4% GBP Senior Subordinated Notes due 2014 (the "7¹/4% notes"), (c) the borrowings in certain foreign currencies under our revolving credit agreements, and (d) the foreign currency denominated intercompany obligations of our foreign subsidiaries to us, are included in other expense, net, on our consolidated statements of operations. Included in other expense, net is $108 of

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net gains and $4,789 of net losses associated with foreign currency transactions for the three months ended March 31, 2004 and 2005, respectively.

c.

Goodwill and Other Intangible Assets

        We apply the provisions of SFAS No. 142, "Goodwill and Other Intangible Assets." Under SFAS No. 142, goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment or more frequently if impairment indicators arise. Separable intangible assets that are not deemed to have indefinite lives are amortized over their useful lives.

        We have selected October 1 as our annual goodwill impairment review date. We performed our last annual goodwill impairment review as of October 1, 2004 and noted no impairment of goodwill at our reporting units as of that date. As of March 31, 2005, no factors were identified that would alter this assessment.

        The changes in the carrying value of goodwill attributable to each reportable operating segment for the three month period ended March 31, 2005 are as follows:

        The components of our amortizable intangible assets at March 31, 2005 are as follows:

(1)

Included in other assets, net in the accompanying consolidated balance sheet.

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d.

Stock-Based Compensation

        As of January 1, 2003, we adopted the measurement provisions of SFAS No. 123, "Accounting for Stock-Based Compensation," as amended by SFAS No. 148, "Accounting for Stock-Based Compensation—Transition and Disclosure." As a result we began using the fair value method of accounting in our financial statements beginning January 1, 2003 using the prospective method. The prospective method involves recognizing expense for the fair value for all awards granted or modified in the year of adoption and thereafter with no expense recognition for previous awards. Additionally, we recognize expense related to the discount embedded in our employee stock purchase plan. We will apply the fair value recognition provisions to all stock based awards granted, modified or settled on or after January 1, 2003 and will continue to provide the required pro forma information for all awards previously granted, modified or settled before January 1, 2003.

        Had we elected to recognize compensation cost based on the fair value of the options granted at grant date as prescribed by SFAS No. 123 and No. 148, net income and net income per share would have been changed to the pro forma amounts indicated in the table below:

        The weighted average fair value of options granted for the three months ended March 31, 2004 and 2005 was $12.09 and $10.39 per share, respectively. The values were estimated on the date of grant

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using the Black-Scholes option pricing model. The following table summarizes the weighted average assumptions used for grants in the respective period:

(1)

Calculated utilizing daily historical volatility over a period that equates to the expected life of the option.

e.

Income Per Share—Basic and Diluted

        In accordance with SFAS No. 128, "Earnings per Share," basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding. The calculation of diluted net income per share is consistent with that of basic net income per share but gives effect to all potential common shares (that is, securities such as options, warrants or convertible securities) that were outstanding during the period, unless the effect is antidilutive. Potential common shares, substantially attributable to stock options, included in the calculation of diluted net income per share totaled 2,208,772 shares and 1,536,016 shares for the three months ended March 31, 2004 and 2005, respectively. No potential common shares for the three months ended March 31, 2004 and potential common shares of 420,961 for the three months ended March 31, 2005, have been excluded from the calculation of diluted net income per share, as their effects are antidilutive.

f.

Supplemental Cash Flow Information

        For the three months ended March 31, 2004 and 2005, cash payments for interest were $46,277 and $46,483, respectively, and cash payments for income taxes were $3,106 and $1,307, respectively.

g.

New Accounting Pronouncements

        In December 2004, the Financial Accounting Standards Board ("FASB") issued SFAS No. 123R, "Share-Based Payment." SFAS No. 123R is a revision of SFAS No. 123 and supersedes Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees" ("APB No. 25"). We adopted the measurement provisions of SFAS No. 123 and SFAS No. 148 in our financial statements beginning January 1, 2003 using the prospective method. The prospective method involves recognizing expense for the fair value for all awards granted or modified in the year of adoption and thereafter with no expense recognition for previous awards. We have applied the fair value recognition provisions to all stock based awards granted, modified or settled on or after January 1, 2003.

        Among other items, SFAS No. 123R eliminates the use of APB No. 25 and the intrinsic value method of accounting, and requires companies to recognize the cost of employee services received in exchange for awards of equity instruments, based on the grant date fair value of those awards, in the financial statements. The effective date of SFAS No. 123R is the first fiscal year beginning after

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June 15, 2005, which would be our first quarter of 2006, although early adoption is allowed. SFAS No. 123R permits companies to adopt its requirements using either a "modified prospective" method, or a "modified retrospective" method. Under the "modified prospective" method, compensation cost is recognized in the financial statements beginning with the effective date, based on the requirements of SFAS No. 123R for all share-based payments granted after that date, and based on the requirements of SFAS No. 123 for all unvested awards granted prior to the effective date of SFAS No. 123R. Under the "modified retrospective" method, the requirements are the same as under the "modified prospective" method, but this method also permits entities to restate financial statements of previous periods based on proforma disclosures made in accordance with SFAS No. 123.

        SFAS No. 123R also requires that the benefits associated with the tax deductions in excess of recognized compensation cost be reported as a financing cash flow, rather than as an operating cash flow as required under current rules. This requirement will reduce net operating cash flows and increase net financing cash flows in periods after the effective date. Since we do not pay significant cash taxes currently, we do not expect this provision to materially impact our statement of cash flows within the next few years.

        We expect to adopt SFAS No. 123R effective January 1, 2006 using the modified prospective method of implementation. Subject to a complete review of the requirements of SFAS No. 123R, based on outstanding stock options granted to employees prior to our prospective implementation of the measurement provisions of SFAS No. 123 and SFAS No. 148 on January 1, 2003, we expect to record $949 of stock compensation expense in 2006 associated with unvested stock option grants issued prior to January 1, 2003.

        In March 2005, the FASB issued FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations, an interpretation of FASB Statement No. 143" (FIN 47). FIN 47 clarifies that conditional asset retirement obligations meet the definition of liabilities and should be recognized when incurred if their fair values can be reasonably estimated. FIN 47 is effective no later than December 31, 2005. The cumulative effect of initially applying FIN 47 will be recognized as a change in accounting principle. We are in the process of evaluating the effect of FIN 47 on our consolidated results of operations and financial position.

(3) Comprehensive Income

        SFAS No. 130, "Reporting Comprehensive Income," requires presentation of the components of comprehensive income, including the changes in equity from non-owner sources such as unrealized

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gains (losses) on hedging transactions, securities and foreign currency translation adjustments. Our total comprehensive income is as follows:

(4) Derivative Instruments and Hedging Activities

        SFAS No. 133, "Accounting for Derivative Instruments and Hedging Activities," requires that every derivative instrument be recorded in the balance sheet as either an asset or a liability measured at its fair value. Periodically, we acquire derivative instruments that are intended to hedge either cash flows or values that are subject to exchange or other market price risk, and not for trading purposes. We have formally documented our hedging relationships, including identification of the hedging instruments and the hedge items, as well as our risk management objectives and strategies for undertaking each hedge transaction. Given the recurring nature of our revenues and the long term nature of our asset base, we have the ability and the preference to use long term, fixed interest rate debt to finance our business, thereby preserving our long term returns on invested capital. We target a range 80% to 85% of our debt portfolio to be fixed with respect to interest rates. Occasionally, we will use floating to fixed interest rate swaps as a tool to maintain our targeted level of fixed rate debt. In addition we will use borrowings in foreign currencies, either obtained in the U.S. or by our foreign subsidiaries, to naturally hedge foreign currency risk associated with our international investments.

        We have entered into two interest rate swap agreements, which are derivatives as defined by SFAS No. 133 and designated as cash flow hedges. These swap agreements hedge interest rate risk on certain amounts of our term loan. We have recorded, in the accompanying consolidated balance sheet, the estimated cost to terminate these swaps (fair value of the derivative liability), a deferred tax asset and a corresponding charge to accumulated other comprehensive items of $2,484, $909 and $1,575, respectively, as of March 31, 2005. For the three months ended March 31, 2004 and 2005, we recorded additional interest expense of $2,237 and $1,533, respectively, resulting from interest rate swap cash payments. These interest rate swap agreements were determined to be highly effective, and therefore no ineffectiveness was recorded in earnings.

        In addition, we have entered into a third interest rate swap agreement, which was designated as a cash flow hedge through December 31, 2002. This swap agreement hedged interest rate risk on certain amounts of our variable operating lease commitments. This swap expired in March 2005. For the three months ended March 31, 2004 and 2005, we recorded additional interest expense of $528 and $134,

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respectively, resulting from the cash payments associated with this interest rate swap agreement. As a result of the repayment of the real estate term loans, we recorded an additional $795 of interest expense in the first quarter of 2004 and $140 of interest income in the first quarter of 2005, representing changes in the fair value of the derivative liability. The total impact of marking to market the fair market value of the derivative liability and cash payments associated with the interest rate swaps agreement resulted in our recording interest expense of $1,323 and interest income of $6 for the three months ended March 31, 2004 and 2005, respectively.

        Also, we consolidated a variable interest entity ("VIE III", collectively with our two other variable interest entities, our "Variable Interest Entities") which had entered into an interest rate swap agreement upon its inception that was designated as a cash flow hedge. This swap agreement hedges the majority of interest rate risk associated with VIE III's real estate term loans. We have recorded, in the accompanying consolidated balance sheet, the estimated cost to terminate this swap (fair value of the derivative liability) of $4,658 ($3,393 recorded in accrued expenses and $1,265 recorded in other long-term liabilities) as of March 31, 2005. For the three months ended March 31, 2004 and 2005, we recorded additional interest expense of $1,228 and $848, respectively, resulting from interest rate swap cash payments. As a result of the repayment of the real estate term loans in the third quarter of 2004, we began marking to market the fair value of the derivative liability. The total impact of marking to market the fair market value of the derivative liability and cash payments associated with the interest rate swap agreement resulted in our recording interest income of $1,428 for the three months ended March 31, 2005.

        In July 2003, we provided the initial financing totaling 190,459 British pounds sterling to IME for all of the consideration associated with the acquisition of the European information management services business of Hays plc ("Hays IMS") using cash on hand and borrowings under our revolving credit facility. In March 2004, IME repaid 135,000 British pounds sterling with proceeds from their new credit agreement (see Note 6). We recorded a foreign currency gain of $11,866 in other (income) expense, net for this intercompany balance in the first quarter of 2004. In order to minimize the foreign currency risk associated with providing IME with the consideration necessary for the acquisition of Hay IMS, we borrowed 80,000 British pounds sterling under our revolving credit facility to create a natural hedge. In the first quarter of 2004, these borrowings were repaid and we recorded a foreign currency loss of $2,995 on the translation of this revolving credit balance to U.S. dollars in other (income) expense, net.

        In addition, on July 16, 2003, we entered into two cross currency swaps with a combined notional value of 100,000 British pounds sterling. We settled these swaps in March 2004 by paying our counter parties a total of $27,714 representing the fair market value of the derivative and the associated swap costs, of which $18,978 was accrued for as of December 31, 2003. In the first quarter of 2004, we recorded a foreign currency loss for this swap of $8,736 in other (income) expense, net in the accompanying consolidated statement of operations. Upon cash payment, we received $162,800 in exchange for 100,000 British pounds sterling. We did not designate these swaps as hedges and, therefore, all mark to market fluctuations of the swaps were recorded in other (income) expense, net in our consolidated statements of operations from inception to cash payment of the swaps.

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        In April 2004, IME entered into two floating for fixed interest rate swap contracts, each with a notional value of 50,000 British pounds sterling and a duration of two years, which were designated as cash flow hedges. These swap agreements hedge interest rate risk on IME's 100,000 British pounds sterling term loan facility (see Note 6). We have recorded, in the accompanying consolidated balance sheet, the fair value of the derivative asset, a deferred tax liability and a corresponding increase to accumulated other comprehensive items of $41 (which was all recorded in other current assets), $13 and $28, respectively, as of March 31, 2005. For the three months ended March 31, 2005, we recorded additional interest income of $20, resulting from interest rate swap cash payments. These interest rate swap agreements were determined to be highly effective, and therefore no ineffectiveness was recorded in earnings.

(5) Acquisitions

        We account for acquisitions using the purchase method of accounting, and accordingly, the results of operations for each acquisition has been included in our consolidated results from their respective acquisition dates. Cash consideration for the various acquisitions was provided through our credit facilities.

        A summary of the consideration paid and the allocation of the purchase price of all 2005 acquisitions is as follows: