Iron Mountain to Present at Financial Conference BusinessWire
Market data is delayed by at least 15 minutes.
    Latest Story Top Stories on IRM
    Iron Mountain Reports Fourth Quarter and Full Year 2023 Results
    6:45a ET February 22 '24 BusinessWire

    -- Data Center: Leased 124 megawatts for the full year 2023 --

    -- Issues Strong 2024 Guidance with Revenue Growth of 10-12% --

    Iron Mountain Incorporated (NYSE: IRM), a global leader in information management services, announces financial results for the fourth quarter and full year 2023. The conference call / webcast details, earnings call presentation and supplemental financial information, which includes definitions of certain capitalized terms used in this release, are available on Iron Mountain's Investor Relations website. Reconciliations of non-GAAP measures to the appropriate GAAP measures are included herein.

    "We are pleased to report outstanding performance in both the fourth quarter and the full year, again resulting in all-time record Revenue and Adjusted EBITDA," said William L. Meaney, President and CEO of Iron Mountain. "We are well positioned to continue our growth trajectory in 2024, which is reflected in our financial guidance for double digit revenue growth. Our Project Matterhorn initiative is propelling us on our growth journey, and our team's unwavering customer-first mindset continues to flourish as we grow our portfolio of products to meet our customers' needs. We are also pleased to confirm that our acquisition of Regency Technologies closed in early January; this acquisition continues to build on our leadership in Asset Lifecycle Management."

    Financial Performance Highlights for the Fourth Quarter and Full Year 2023
    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    ($ in millions, except per share data)                                                                    
                       Three Months Ended                        Three Months Ended                                                  Y/Y % Change                                                       Full Year                                                      Y/Y % Change
                                         -------------------- ------------------------------------------------------------                        ------------------------------------------------------------                        ------------------------------------------------------------                        ------------------------------------------------------------
                            12/31/23             12/31/23               12/31/22              Reported $             Constant Fx             12/31/23               12/31/22              Reported $             Constant Fx
                                         -------------------- --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------
                                                 $871                 $871                   $769                    13%                    12%                  $3,371                 $3,034                   11%                    11%
      Storage Rental Revenue
                                                 $549                 $549                   $510                    8%                     7%                   $2,109                 $2,070                   2%                     2%
      Service Revenue
                                         -------------------- --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------                      --------------------
    Total Revenue                               $1,420               $1,420                 $1,279                   11%                    10%                  $5,480                 $5,104                   7%                     8%
                                                     
    Net Income                                    $29                  $29                   $126                   (77)%                      $187                   $562                   (67)%           
    Reported EPS                                 $0.10                $0.10                  $0.42                  (76)%                      $0.63                  $1.90                  (67)%           
    Adjusted EPS                                 $0.52                $0.52                  $0.43                   21%                       $1.82                  $1.79                   2%             
                                                     
    Adjusted EBITDA                              $525                 $525                   $472                    11%                    10%                  $1,962                 $1,827                   7%                     8%
                                                 37.0%                37.0%                  36.9%                 10 bps                      35.8%                  35.8%             --       
      Adjusted EBITDA Margin
                                                     
    AFFO (Updated Calculation)                   $328                 $328                   $299                    10%                      $1,211                 $1,151                   5%             
    AFFO per share (Updated Calculation)         $1.11                $1.11                  $1.02                   9%                        $4.12                  $3.93                   5%             
    AFFO (Prior Calculation)                     $317                 $317                   $287                    10%                      $1,168                 $1,110                   5%             
    AFFO per share (Prior Calculation)           $1.07                $1.07                  $0.98                   9%                        $3.97                  $3.80                   4%             
    ------------------------------------ -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- --------------------
    For details on our updated AFFO calculation, please see page 2.
    

    Total reported revenues for the fourth quarter were $1.4 billion, compared with $1.3 billion in the fourth quarter of 2022, an increase of 11.0%. Excluding the impact of foreign currency exchange ("Fx"), total reported revenues increased 10.0% compared to the prior year, driven by a 12.0% increase in storage rental revenue. Service revenue growth increased 8.8% on a constant currency basis excluding the ALM business. For the full year, total reported revenues increased 7.4%, or 7.6% excluding the impact of Fx. Net Income for the fourth quarter was $29.2 million, compared with $125.7 million in the fourth quarter of 2022. For the full year, net income was $187.3 million, compared with $562.1 million in 2022, primarily driven by higher levels of restructuring and other transformation costs, lower gains on asset recycling as compared to the full year of 2022, and the negative impact from changes in foreign exchange rates. Adjusted EBITDA for the fourth quarter was $525.2 million, compared with $471.9 million in the fourth quarter of 2022, an increase of 11.3%. On a constant currency basis, Adjusted EBITDA increased by 10.3% in the fourth quarter, driven by the increase in storage rental revenue and data center commencements. On a constant currency basis, full year Adjusted EBITDA increased 7.5%. FFO (Normalized) per share was $0.83 for the fourth quarter, compared with $0.74 in the fourth quarter of 2022. For the full year, FFO (Normalized) per share was $3.04, compared with $2.93 in 2022, or an increase of 3.8%. AFFO was $327.6 million for the fourth quarter, compared with $298.5 million in the fourth quarter of 2022, an increase of 10%. For the full year, AFFO was $1.21 billion, compared with $1.15 billion in 2022, or an increase of 5%. Effective Q4 2023, our AFFO definition has been updated to exclude amortization of capitalized commissions. With this change, our calculation more accurately represents our funds available to support growth, and is more comparable to our peers, including those in the data center industry. The updated calculation has resulted in an $11.0 million increase to AFFO in the fourth quarter and a $43.4 million increase for the full year. For comparability to our previously issued financial guidance, please see the above table which includes the AFFO results based on both our updated and prior calculations. AFFO per share was $1.11 for the fourth quarter, compared with $1.02 in the fourth quarter of 2022. For the full year, AFFO per share was $4.12, compared with $3.93 in 2022 or an increase of 5%. Effective Q4 2023, our AFFO definition has been updated to exclude amortization of capitalized commissions. With this change, our calculation is more comparable to our peers, including those in the data center industry. The updated calculation has resulted in a $0.04 increase to AFFO per share in the fourth quarter and a $0.15 increase to AFFO per share for the full year. For comparability to our previously issued financial guidance, please see the above table which includes the AFFO per share results based on both our updated and prior calculations.

    Dividend

    On February 22, 2024, Iron Mountain's Board of Directors declared a quarterly cash dividend of $0.65 per share for the first quarter. The first quarter 2024 dividend is payable on April 4, 2024, for shareholders of record on March 15, 2024.

    Guidance

    Iron Mountain issued full year 2024 guidance; details are summarized in the table below.

                                                                                    2024 Guidance(1)
    ($ in millions, except per share data)                    
                            2024 Guidance        2024 Guidance        2024 Guidance    Y/Y % Change at Midpoint Y/Y % Change at Midpoint Y/Y % Change at Midpoint
    Total Revenue                             $6,000 - $6,150      $6,000 - $6,150      $6,000 - $6,150              11%                      11%                      11%
    Adjusted EBITDA                           $2,175 - $2,225      $2,175 - $2,225      $2,175 - $2,225              12%                      12%                      12%
    AFFO                                      $1,300 - $1,335      $1,300 - $1,335      $1,300 - $1,335              9%                       9%                       9%
    
    (1) Iron Mountain does not provide a reconciliation of non-GAAP measures that it discusses as part of its annual guidance or long term outlook because certain significant information required for such reconciliation is not available without unreasonable efforts or at all, including, most notably, the impact of exchange rates on Iron Mountain's transactions, loss or gain related to the disposition of real estate and other income or expense. Without this information, Iron Mountain does not believe that a reconciliation would be meaningful. AFFO and AFFO per share are presented based on our updated calculation, and growth is calculated on a comparable basis.
    

    About Iron Mountain

    Iron Mountain Incorporated (NYSE: IRM) is a global leader in information management services. Founded in 1951 and trusted by more than 240,000 customers worldwide, Iron Mountain serves to protect and elevate the power of our customers' work. Through a range of offerings including digital transformation, data centers, secure records storage, information management, asset lifecycle management, secure destruction and art storage and logistics, Iron Mountain helps businesses bring light to their dark data, enabling customers to unlock value and intelligence from their stored digital and physical assets at speed and with security, while helping them meet their environmental goals.

    To learn more about Iron Mountain, please visit: www.IronMountain.com and follow @IronMountain on X (formerly Twitter) and LinkedIn.

    Forward Looking Statements

    We have made statements in this press release that constitute "forward-looking statements" as that term is defined in the Private Securities Litigation Reform Act of 1995 and other securities laws. These forward-looking statements concern our current expectations regarding our future results from operations, economic performance, financial condition, goals, strategies, investment objectives, plans and achievements.

    These forward-looking statements are subject to various known and unknown risks, uncertainties and other factors, and you should not rely upon them except as statements of our present intentions and of our present expectations, which may or may not occur. When we use words such as "believes", "expects", "anticipates", "estimates", "plans", "intends", "projects", "pursue", "will" or similar expressions, we are making forward-looking statements. Although we believe that our forward-looking statements are based on reasonable assumptions, our expected results may not be achieved, and actual results may differ materially from our expectations. In addition, important factors that could cause actual results to differ from expectations include, among others: (i) our ability or inability to execute our strategic growth plan, including our ability to invest according to plan, grow our businesses (including through joint ventures or other co-investment vehicles), incorporate alternative technologies (including artificial intelligence) into our offerings, achieve satisfactory returns on new product offerings, continue our revenue management, expand and manage our global operations, complete acquisitions on satisfactory terms, integrate acquired companies efficiently and transition to more sustainable sources of energy; (ii) changes in customer preferences and demand for our storage and information management services, including as a result of the shift from paper and tape storage to alternative technologies that require less physical space; (iii) the costs of complying with and our ability to comply with laws, regulations and customer requirements, including those relating to data privacy and cybersecurity issues, as well as fire and safety and environmental standards; (iv) the impact of attacks on our internal information technology ("IT") systems, including the impact of such incidents on our reputation and ability to compete and any litigation or disputes that may arise in connection with such incidents; (v) our ability to fund capital expenditures; (vi) the impact of our distribution requirements on our ability to execute our business plan; (vii) our ability to remain qualified for taxation as a real estate investment trust for United States federal income tax purposes; (viii) changes in the political and economic environments in the countries in which we operate and changes in the global political climate; (ix) our ability to raise debt or equity capital and changes in the cost of our debt; (x) our ability to comply with our existing debt obligations and restrictions in our debt instruments; (xi) the impact of service interruptions or equipment damage and the cost of power on our data center operations; (xii) the cost or potential liabilities associated with real estate necessary for our business; (xiii) unexpected events, including those resulting from climate change or geopolitical events, could disrupt our operations and adversely affect our reputation and results of operations; (xiv) failures to implement and manage new IT systems; (xv) other trends in competitive or economic conditions affecting our financial condition or results of operations not presently contemplated; and (xvi) the other risks described in our periodic reports filed with the SEC, including under the caption "Risk Factors" in Part I, Item 1A of our Annual Report. Except as required by law, we undertake no obligation to update any forward-looking statements appearing in this press release.

    Reconciliation of Non-GAAP Measures

    Throughout this press release, Iron Mountain discusses (1) Adjusted EBITDA, (2) Adjusted EPS, (3) FFO (Nareit), (4) FFO (Normalized), and (5) AFFO. These measures do not conform to accounting principles generally accepted in the United States ("GAAP"). These non-GAAP measures are supplemental metrics designed to enhance our disclosure and to provide additional information that we believe to be important for investors to consider in addition to, but not as a substitute for, other measures of financial performance reported in accordance with GAAP, such as operating income, net income (loss) attributable to Iron Mountain Incorporated or cash flows from operating activities (as determined in accordance with GAAP). The reconciliation of these measures to the appropriate GAAP measure, as required by Regulation G under the Securities Exchange Act of 1934, as amended, and their definitions are included later in this release.

    Consolidated Balance Sheets
    -----------------------------------------------------------------
    (Audited; dollars in thousands)
                                                        12/31/2023                 12/31/2023                         12/31/2022
                                                                      -------------------- -------------------------------                       -------------------------------
    ASSETS                                                                               
    Current Assets:                                                                      
                                                                                  $222,789    $222,789        $141,797  
      Cash and Cash Equivalents
                                                                                 1,259,826   1,259,826       1,174,915  
      Accounts Receivable, Net
                                                                                   252,930     252,930         230,433  
      Prepaid Expenses and Other
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                                $1,735,545  $1,735,545      $1,547,145  
        Total Current Assets
    Property, Plant and Equipment:                                                       
                                                                               $10,373,989 $10,373,989      $9,025,765  
      Property, Plant and Equipment
                                                                                (4,059,120  (4,059,120                    )    (3,910,321                    )
      Less: Accumulated Depreciation
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                                $6,314,869  $6,314,869      $5,115,444  
        Property, Plant and Equipment, Net
    Other Assets, Net:                                                                   
                                                                                $5,017,912  $5,017,912      $4,882,734  
      Goodwill
                                                                                 1,279,800   1,279,800       1,423,145  
      Customer and Supplier Relationships and Other Intangible Assets
                                                                                 2,696,024   2,696,024       2,583,704  
      Operating Lease Right-of-Use Assets
                                                                                   429,652     429,652         588,342  
      Other
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                                $9,423,388  $9,423,388      $9,477,925  
        Total Other Assets, Net
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                               $17,473,802 $17,473,802     $16,140,514  
        Total Assets
                                                                      ==================== =========== ====================                      =========== ====================
                                                                      
    LIABILITIES AND EQUITY                                                               
    Current Liabilities:                                                                 
                                                                                  $120,670    $120,670         $87,546  
      Current Portion of Long-term Debt
                                                                                   539,594     539,594         469,198  
      Accounts Payable
                                                                                 1,250,259   1,250,259       1,031,910  
      Accrued Expenses and Other Current Liabilities
                                                                                   325,665     325,665         328,910  
      Deferred Revenue
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                                $2,236,188  $2,236,188      $1,917,564  
        Total Current Liabilities
                                                                                11,812,500  11,812,500      10,481,449  
      Long-term Debt, Net of Current Portion
                                                                                 2,562,394   2,562,394       2,429,167  
      Long-term Operating Lease Liabilities, Net of Current Portion
                                                                                   237,590     237,590         317,376  
      Other Long-term Liabilities
                                                                                   235,410     235,410         263,005  
      Deferred Income Taxes
                                                                                   177,947     177,947          95,160  
      Redeemable Noncontrolling Interests
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                               $15,025,841 $15,025,841     $13,586,157  
        Total Long-term Liabilities
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                               $17,262,029 $17,262,029     $15,503,721  
        Total Liabilities
    Equity                                                                               
                                                                      -------------------- -------------------------------                       -------------------------------
                                                                                  $211,773    $211,773        $636,793  
        Total Equity
                                                                      -------------------- ----------- --------------------                      ----------- --------------------
                                                                               $17,473,802 $17,473,802     $16,140,514  
        Total Liabilities and Equity
                                                                      ==================== =========== ====================                      =========== ====================
    
    Quarterly Consolidated Statements of Operations
    -----------------------------------------------------------------------
    (Unaudited; dollars in thousands, except per-share data)
                                                                Q4 2023              Q4 2023                      Q3 2023                              Q/Q %                                Q4 2022                            Y/Y %
                                                                                                                                                                                                               Change                                                                                                                           Change
                                                                            -------------------- --------------------                      ------------------------------                       ----------------------------------                                            ------------------------------                       ------------------------------
    Revenues:                                                                                                                         
                                                                                        $871,144             $871,144     $858,656                1.5 %                          $769,457           13.2 %
      Storage Rental
                                                                                         548,685              548,685      529,519                3.6 %                           509,592            7.7 %
      Service
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
                                                                                      $1,419,829           $1,419,829   $1,388,175                2.3 %                        $1,279,049           11.0 %
        Total Revenues
                                                                                                                   
    Operating Expenses:                                                                                                               
                                                                                        $601,329             $601,329     $592,201                1.5 %                          $539,982           11.4 %
      Cost of Sales (excluding Depreciation and Amortization)
                                                                                         314,932              314,932      315,030     --          279,161           12.8 %
      Selling, General and Administrative
                                                                                         199,941              199,941      198,757                0.6 %                           190,649            4.9 %
      Depreciation and Amortization
                                                                                          12,860               12,860        9,909               29.8 %                             9,653           33.2 %
      Acquisition and Integration Costs
                                                                                          53,853               53,853       38,861               38.6 %                            38,551           39.7 %
      Restructuring and Other Transformation
                                                                                           6,157                6,157       (4,416 )                                 n/a          (27,144 )                          (122.7 )%
      Loss (Gain) on Disposal/Write-Down of PP&E, Net
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
    Total Operating Expenses                                                          $1,189,072           $1,189,072   $1,150,342                3.4 %                        $1,030,852           15.3 %
                                                                                                                   
    Operating Income (Loss)                                                             $230,757             $230,757     $237,833               (3.0 )%                         $248,197           (7.0 )%
                                                                                         151,784              151,784      152,801               (0.7 )%                          136,748           11.0 %
      Interest Expense, Net
                                                                                          40,761               40,761      (16,271 )                                 n/a          (31,597 )                             n/a  
      Other Expense (Income), Net
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
    Net Income (Loss) Before Provision (Benefit) for Income Taxes                        $38,212              $38,212     $101,303              (62.3 )%                         $143,046          (73.3 )%
                                                                                           9,018                9,018        9,912               (9.0 )%                           17,392          (48.1 )%
      Provision (Benefit) for Income Taxes
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
    Net Income (Loss)                                                                    $29,194              $29,194      $91,391              (68.1 )%                         $125,654          (76.8 )%
                                                                                             712                  712          348              104.6 %                             3,216          (77.9 )%
      Less: Net Income (Loss) Attributable to Noncontrolling Interests
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
    Net Income (Loss) Attributable to Iron Mountain Incorporated                         $28,482              $28,482      $91,043              (68.7 )%                         $122,437          (76.7 )%
                                                                                                                   
    Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:                                                           
                                                                            -------------------- --------------------                      ------------------------------                       ----------------------------------                                            ------------------------------                       ------------------------------
                                                                                           $0.10                $0.10        $0.31              (67.7 )%                            $0.42          (76.2 )%
      Basic
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
                                                                                           $0.10                $0.10        $0.31              (67.7 )%                            $0.42          (76.2 )%
      Diluted
                                                                            -------------------- --------------------                      ---------- --------------------                      -------------- --------------------                                           ---------- --------------------                      ---------- --------------------
                                                                                                                   
    Weighted Average Common Shares Outstanding - Basic                                   292,328              292,328      292,148                0.1 %                           291,227            0.4 %
    Weighted Average Common Shares Outstanding - Diluted                                 295,014              295,014      294,269                0.3 %                           292,892            0.7 %
    
    Full Year Consolidated Statements of Operations
    -----------------------------------------------------------------------
    (Audited; dollars in thousands, except per-share data)
                                                            Full Year 2023             Full Year 2023                    Full Year 2022                       % Change
                                                                            -------------------- ------------------------------                       ------------------------------                       ------------------------------
    Revenues:                                                                                                
                                                                                      $3,370,645 $3,370,645     $3,034,023           11.1 %
      Storage Rental
                                                                                       2,109,644  2,109,644      2,069,551            1.9 %
      Service
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
                                                                                      $5,480,289 $5,480,289     $5,103,574            7.4 %
        Total Revenues
                                                                                          
    Operating Expenses:                                                                                      
                                                                                      $2,357,800 $2,357,800     $2,189,120            7.7 %
      Cost of Sales (excluding Depreciation and Amortization)
                                                                                       1,236,287  1,236,287      1,140,577            8.4 %
      Selling, General and Administrative
                                                                                         776,159    776,159        727,595            6.7 %
      Depreciation and Amortization
                                                                                          25,875     25,875         47,746          (45.8 )%
      Acquisition and Integration Costs
                                                                                         175,215    175,215         41,933            n/a  
      Restructuring and Other Transformation
                                                                                         (12,825    (12,825 )                         (93,268 )                           (86.2 )%
      (Gain) Loss on Disposal/Write-Down of PP&E, Net
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    Total Operating Expenses                                                          $4,558,511 $4,558,511     $4,053,703           12.5 %
                                                                                          
    Operating Income (Loss)                                                             $921,778   $921,778     $1,049,871          (12.2 )%
                                                                                         585,932    585,932        488,014           20.1 %
      Interest Expense, Net
                                                                                         108,640    108,640        (69,781 )                             n/a  
      Other Expense (Income), Net
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    Net Income (Loss) Before Provision (Benefit) for Income Taxes                       $227,206   $227,206       $631,638          (64.0 )%
                                                                                          39,943     39,943         69,489          (42.5 )%
      Provision (Benefit) for Income Taxes
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    Net Income (Loss)                                                                   $187,263   $187,263       $562,149          (66.7 )%
                                                                                           3,029      3,029          5,168          (41.4 )%
      Less: Net Income (Loss) Attributable to Noncontrolling Interests
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    Net Income (Loss) Attributable to Iron Mountain Incorporated                        $184,234   $184,234       $556,981          (66.9 )%
                                                                                          
    Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:                                  
                                                                            -------------------- ------------------------------                       ------------------------------                       ------------------------------
                                                                                           $0.63      $0.63          $1.92          (67.2 )%
      Basic
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
                                                                                           $0.63      $0.63          $1.90          (66.8 )%
      Diluted
                                                                            -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
                                                                                          
    Weighted Average Common Shares Outstanding - Basic                                   291,936    291,936        290,812            0.4 %
    Weighted Average Common Shares Outstanding - Diluted                                 293,965    293,965        292,444            0.5 %
    
    Quarterly Reconciliation of Net Income (Loss) to Adjusted EBITDA
    -----------------------------------------------------------------------------------------------------------
    (Dollars in thousands)
                                                                                                    Q4 2023              Q4 2023                      Q3 2023                            Q/Q %                              Q4 2022                            Y/Y %
                                                                                                                                                                                                                                                 Change                                                                                                                         Change
                                                                                                                -------------------- --------------------                      ------------------------------                       ------------------------------                                            ------------------------------                       ------------------------------
                                                                                                                                                   
    Net Income (Loss)                                                                                                        $29,194              $29,194      $91,391          (68.1 )%                         $125,654          (76.8 )%
                                                                                                                                                   
    Add / (Deduct):                                                                                                                                                   
                                                                                                                             151,784              151,784      152,801           (0.7 )%                          136,748           11.0 %
      Interest Expense, Net
                                                                                                                               9,018                9,018        9,912           (9.0 )%                           17,392          (48.1 )%
      Provision (Benefit) for Income Taxes
                                                                                                                             199,941              199,941      198,757            0.6 %                           190,649            4.9 %
      Depreciation and Amortization
                                                                                                                              12,860               12,860        9,909           29.8 %                             9,653           33.2 %
      Acquisition and Integration Costs
                                                                                                                              53,853               53,853       38,861           38.6 %                            38,551           39.7 %
      Restructuring and Other Transformation
                                                                                                                               6,157                6,157       (4,416 )                             n/a          (27,144 )                          (122.7 )%
      Loss (Gain) on Disposal/Write-Down of PP&E, Net (Including Real Estate)
                                                                                                                              40,332               40,332      (17,626 )                             n/a          (34,455 )                             n/a  
      Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                              20,604               20,604       18,313           12.5 %                            10,938           88.4 %
      Stock-Based Compensation Expense
                                                                                                                               1,506                1,506        2,060          (26.9 )%                            3,937          (61.7 )%
      Our Share of Adjusted EBITDA Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                -------------------- --------------------                      ---------- --------------------                      ---------- --------------------                                           ---------- --------------------                      ---------- --------------------
    Adjusted EBITDA                                                                                                         $525,249             $525,249     $499,962            5.1 %                          $471,923           11.3 %
                                                                                                                ==================== ====================                      ========== ====================                      ========== ====================                                           ========== ====================                      ========== ====================
    

    Adjusted EBITDA

    We define Adjusted EBITDA as net income (loss) before interest expense, net, provision (benefit) for income taxes, depreciation and amortization (inclusive of our share of Adjusted EBITDA from our unconsolidated joint ventures), and excluding certain items we do not believe to be indicative of our core operating results, specifically: (i) Acquisition and Integration Costs; (ii) Restructuring and other transformation; (iii) (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate); (iv) Other expense (income), net; and (v) Stock-based compensation expense. 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 flows 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.

    Full Year Reconciliation of Net Income (Loss) to Adjusted EBITDA
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands)
                                                                                                  Full Year 2023             Full Year 2023                    Full Year 2022                       % Change
                                                                                                                  -------------------- ------------------------------                       ------------------------------                       ------------------------------
                                                                                                                                
    Net Income (Loss)                                                                                                         $187,263   $187,263       $562,149          (66.7 )%
                                                                                                                                                   
      Add / (Deduct):
                                                                                                                               585,932    585,932        488,014           20.1 %
        Interest Expense, Net
                                                                                                                                39,943     39,943         69,489          (42.5 )%
        Provision (Benefit) for Income Taxes
                                                                                                                               776,159    776,159        727,595            6.7 %
        Depreciation and Amortization
                                                                                                                                25,875     25,875         47,746          (45.8 )%
        Acquisition and Integration Costs
                                                                                                                               175,215    175,215         41,933            n/a  
        Restructuring and Other Transformation
                                                                                                                               (12,825    (12,825 )                         (93,268 )                           (86.2 )%
        (Gain) Loss on Disposal/Write-Down of PP&E, Net (Including Real Estate)
                                                                                                                                98,891     98,891        (83,268 )                             n/a  
        Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                73,799     73,799         56,861           29.8 %
        Stock-Based Compensation Expense
                                                                                                                                11,425     11,425          9,806           16.5 %
        Our Share of Adjusted EBITDA Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    Adjusted EBITDA                                                                                                         $1,961,677 $1,961,677     $1,827,057            7.4 %
                                                                                                                  ==================== ========== ====================                      ========== ====================                      ========== ====================
    
    Quarterly Reconciliation of Reported Earnings per Share to Adjusted Earnings per Share
    -----------------------------------------------------------------------------------------------------------
                                                                                                    Q4 2023                      Q4 2023                               Q3 2023                              Q/Q %                              Q4 2022                            Y/Y %
                                                                                                                                                                                                                                                                    Change                                                                                                                         Change
                                                                                                                -------------------- ----------------------------------                       ----------------------------------                       ------------------------------                                            ------------------------------                       ------------------------------
                                                                                                                                                                      
    Reported EPS - Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated                             $0.10          $0.10              $0.31          (67.7 )%                            $0.42          (76.2 )%
    Add / (Deduct):                                                                                                                                                                      
                                                                                                                                0.04           0.04               0.03           33.3 %                              0.03           33.3 %
      Acquisition and Integration Costs
                                                                                                                                0.18           0.18               0.13           38.5 %                              0.13           38.5 %
      Restructuring and Other Transformation
                                                                                                                                0.02           0.02              (0.02 )                             n/a            (0.09 )                          (122.2 )%
      Loss (Gain) on Disposal/Write-Down of PP&E, Net
                                                                                                                                0.14           0.14              (0.06 )                             n/a            (0.12 )                             n/a  
      Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                0.07           0.07               0.06           16.7 %                              0.04           75.0 %
      Stock-Based Compensation Expense
                                                                                                                                0.01           0.01               0.02          (50.0 )%                             0.03          (66.7 )%
      Non-Cash Amortization Related to Derivative Instruments
                                                                                                                               (0.04          (0.04 )                               (0.03 )                            33.3 %                             (0.02 )                           100.0 %
      Tax Impact of Reconciling Items and Discrete Tax Items (1)
                                                                                                                      -- --     --            n/a             0.01         (100.0 )%
      Net Income Attributable to Noncontrolling Interests
                                                                                                                -------------------- -------------- --------------------                      -------------- --------------------                      ---------- --------------------                                           ---------- --------------------                      ---------- --------------------
    
    (1) The difference between our effective tax rates and our structural tax rate (or adjusted effective tax rates) for the quarters ended December 31, 2023 and 2022 is primarily due to (i) the reconciling items above, which impact our reported net income (loss) before provision (benefit) for income taxes but have an insignificant impact on our reported provision (benefit) for income taxes and (ii) other discrete tax items. Our structural tax rate for purposes of the calculation of Adjusted EPS for the quarters ended December 31, 2023, September 30, 2023 and December 31, 2022 was 12.3%, 13.3% and 15.2%, respectively.
    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    

    Adjusted Earnings Per Share, or Adjusted EPS

    We define Adjusted EPS as reported earnings per share fully diluted from net income (loss) attributable to Iron Mountain Incorporated (inclusive of our share of adjusted losses (gains) from our unconsolidated joint ventures) and excluding certain items, specifically: (i) Acquisition and Integration Costs; (ii) Restructuring and other transformation; (iii) Amortization related to the write-off of certain customer relationship intangible assets; (iv) (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate); (v) Other expense (income), net; (vi) Stock-based compensation expense; (vii) Non-cash amortization related to derivative instruments; and (viii) Tax impact of reconciling items and discrete tax items. We do not believe these excluded items to be indicative of our ongoing operating results, and they are not considered when we are forecasting our future results. We believe Adjusted EPS is of value to our current and potential investors when comparing our results from past, present and future periods. Figures may not foot due to rounding.

    Full Year Reconciliation of Reported Earnings per Share to Adjusted Earnings per Share
    -------------------------------------------------------------------------------------------------------------
                                                                                                  Full Year 2023               Full Year 2023                      Full Year 2022                       % Change
                                                                                                                  -------------------- ----------------------------------                       ------------------------------                       ------------------------------
                                                                                                                                    
    Reported EPS - Fully Diluted from Net Income (Loss) Attributable to Iron Mountain Incorporated                               $0.63          $0.63          $1.90          (66.8 )%
                                                                                                                                                       
      Add / (Deduct):
                                                                                                                                  0.09           0.09           0.16          (43.8 )%
        Acquisition and Integration Costs
                                                                                                                                  0.60           0.60           0.14            n/a  
        Restructuring and Other Transformation
                                                                                                                        -- --           0.02         (100.0 )%
        Amortization Related to the Write-Off of Certain Customer Relationship Intangible Assets
                                                                                                                                 (0.04          (0.04 )                           (0.31 )                           (87.1 )%
        (Gain) Loss on Disposal/Write-Down of PP&E, Net
                                                                                                                                  0.34           0.34          (0.28 )                             n/a  
        Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                  0.25           0.25           0.19           31.6 %
        Stock-Based Compensation Expense
                                                                                                                                  0.07           0.07           0.03          133.3 %
        Non-Cash Amortization Related to Derivative Instruments
                                                                                                                                 (0.12          (0.12 )                           (0.08 )                            50.0 %
        Tax Impact of Reconciling Items and Discrete Tax Items (1)
                                                                                                                                  0.01           0.01           0.02          (50.0 )%
        Net Income Attributable to Noncontrolling Interests
                                                                                                                  -------------------- -------------- --------------------                      ---------- --------------------                      ---------- --------------------
    
    (1) The difference between our effective tax rates and our structural tax rate (or adjusted effective tax rates) for the years ended December 31, 2023 and 2022 is primarily due to (i) the reconciling items above, which impact our reported net income (loss) before provision (benefit) for income taxes but have an insignificant impact on our reported provision (benefit) for income taxes and (ii) other discrete tax items. Our structural tax rate for purposes of the calculation of Adjusted EPS for the years ended December 31, 2023 and 2022 was 12.3% and 15.2%, respectively. The Tax Impact of Reconciling Items and Discrete Tax Items was calculated using the current quarter's estimate of the annual structural tax rate for the full year. This may result in the current period adjustment plus prior reported quarterly adjustments not summing to the full year adjustment.
    
    Quarterly Reconciliation of Net Income (Loss) to FFO and AFFO
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands, except per-share data)
                                                                                                      Q4 2023                    Q4 2023                           Q3 2023                            Q/Q %                                Q4 2022                                Y/Y %
                                                                                                                                                                                                                                                              Change                                                                                                                               Change
                                                                                                                  -------------------- ------------------------------                       ------------------------------                       ------------------------------                                            ----------------------------------                       ----------------------------------
                                                                                                                                                                    
    Net Income                                                                                                                 $29,194    $29,194        $91,391          (68.1 )%                             $125,654              (76.8 )%
                                                                                                                                                                                       
      Add / (Deduct):
                                                                                                                                83,928     83,928         80,430            4.4 %                                78,902                6.4 %
        Real Estate Depreciation (1)
                                                                                                                                   193        193            750          (74.3 )%                              (29,629 )                              (100.7 )%
        Loss (Gain) on Sale of Real Estate, Net of Tax
                                                                                                                                 3,804      3,804          7,482          (49.2 )%                                5,106              (25.5 )%
        Data Center Lease-Based Intangible Assets Amortization (2)
                                                                                                                                   853        853            679           25.6 %                        --     --  
        Our Share of FFO (Nareit) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------                                           -------------- --------------------                      -------------- --------------------
    FFO (Nareit)                                                                                                              $117,972   $117,972       $180,732          (34.7 )%                             $180,033              (34.5 )%
                                                                                                                                                                                       
      Add / (Deduct):
                                                                                                                                12,860     12,860          9,909           29.8 %                                 9,653               33.2 %
        Acquisition and Integration Costs
                                                                                                                                53,853     53,853         38,861           38.6 %                                38,551               39.7 %
        Restructuring and Other Transformation
                                                                                                                                 6,290      6,290         (5,116 )                             n/a                2,138              194.3 %
        Loss (Gain) on Disposal/Write-Down of PP&E, Net (Excluding Real Estate)
                                                                                                                                40,332     40,332        (17,626 )                             n/a              (34,455 )                                 n/a  
        Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                20,604     20,604         18,313           12.5 %                                10,938               88.4 %
        Stock-Based Compensation Expense
                                                                                                                                 4,176      4,176          5,270          (20.8 )%                                9,100              (54.1 )%
        Non-Cash Amortization Related to Derivative Instruments
                                                                                                                                 3,022      3,022          3,001            0.7 %                                 2,970                1.8 %
        Real Estate Financing Lease Depreciation
                                                                                                                               (13,050    (13,050 )                         (10,220 )                            27.7 %                                (5,043 )                               158.8 %
        Tax Impact of Reconciling Items and Discrete Tax Items (3)
                                                                                                                                   (56        (56 )                             (44 )                            27.3 %                                 2,297             (102.4 )%
        Our Share of FFO (Normalized) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------                                           -------------- --------------------                      -------------- --------------------
    FFO (Normalized)                                                                                                          $246,005   $246,005       $223,080           10.3 %                              $216,182               13.8 %
                                                                                                                  ==================== ========== ====================                      ========== ====================                      ========== ====================                                           ============== ====================                      ============== ====================
    Per Share Amounts (Fully Diluted Shares):                                                                                                                                          
    FFO (Nareit)                                                                                                                 $0.40      $0.40          $0.61          (34.4 )%                                $0.61              (34.4 )%
    FFO (Normalized)                                                                                                             $0.83      $0.83          $0.76            9.2 %                                 $0.74               12.2 %
                                                                                                                                                                    
    Weighted Average Common Shares Outstanding - Basic                                                                         292,328    292,328        292,148            0.1 %                               291,227                0.4 %
    
    (1) Includes depreciation expense related to owned real estate assets (land improvements, buildings, building improvements, leasehold improvements and racking), excluding depreciation related to real estate financing leases.
    (2) Includes amortization expense for Data Center In-Place Lease Intangible Assets and Data Center Tenant Relationship Intangible Assets.
    

    Funds From Operations, or FFO (Nareit), and FFO (Normalized)

    Funds from operations ("FFO") is defined by the National Association of Real Estate Investment Trusts as net income (loss) excluding depreciation on real estate assets, losses and gains on sale of real estate, net of tax, and amortization of data center leased-based intangibles ("FFO (Nareit)"). We calculate our FFO measure, including FFO (Nareit), adjusting for our share of reconciling items from our unconsolidated joint ventures. FFO (Nareit) does not give effect to real estate depreciation because these amounts are computed, under GAAP, to allocate the cost of a property over its useful life. Because values for well-maintained real estate assets have historically increased or decreased based upon prevailing market conditions, we believe that FFO (Nareit) provides investors with a clearer view of our operating performance. Our most directly comparable GAAP measure to FFO (Nareit) is net income (loss).

    We modify FFO (Nareit), as is common among REITs seeking to provide financial measures that most meaningfully reflect their particular business ("FFO (Normalized)"). Our definition of FFO (Normalized) excludes certain items included in FFO (Nareit) that we believe are not indicative of our core operating results, specifically: (i) Acquisition and Integration Costs; (ii) Restructuring and other transformation; (iii) (Gain) loss on disposal/write-down of property, plant and equipment, net (excluding real estate); (iv) Other expense (income) net; (v) Stock-based compensation expense; (vi) Non-cash amortization related to derivative instruments; (vii) Real estate financing lease depreciation; and (viii) Tax impact of reconciling items and discrete tax items.

    FFO (Normalized) per share

    FFO (Normalized) divided by weighted average fully-diluted shares outstanding.

    Quarterly Reconciliation of Net Income (Loss) to FFO and AFFO (continued)
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands, except per-share data)
                                                                                                      Q4 2023              Q4 2023                      Q3 2023                       Q/Q %                   Q4 2022                       Y/Y %
                                                                                                                                                                                                                                              Change                                                                                                         Change
                                                                                                                  -------------------- --------------------                      ------------------------------                       --------------------                                            --------------------                      ------------------------------
                                                                                                                                
    FFO (Normalized)                                                                                                          $246,005             $246,005     $223,080           10.3 %                          $216,182         13.8 %
                                                                                                                                                   
      Add / (Deduct):
                                                                                                                                51,572               51,572       49,500            4.2 %                            46,486         10.9 %
        Non-Real Estate Depreciation
                                                                                                                                57,613               57,613       58,344           (1.3 )%                           57,186          0.7 %
        Amortization Expense (1)
                                                                                                                                 3,278                3,278        5,485          (40.2 )%                            4,508        (27.3 )%
        Amortization of Deferred Financing Costs
                                                                                                                                 1,829                1,829        1,715            6.6 %                             2,587        (29.3 )%
        Revenue Reduction Associated with Amortization of Customer Inducements and Above- and Below-Market Leases
                                                                                                                                 4,982                4,982        6,119          (18.6 )%                            6,024        (17.3 )%
        Non-Cash Rent Expense (Income)
                                                                                                                                 7,090                7,090       (8,364 )                          (184.8 )%                              916          n/a  
        Reconciliation to Normalized Cash Taxes
                                                                                                                                   181                  181          182           (0.5 )%                              974        (81.4 )%
        Our Share of AFFO Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                                                   
      Less:
                                                                                                                                44,916               44,916       34,861           28.8 %                            36,340         23.6 %
        Recurring Capital Expenditures
                                                                                                                  -------------------- --------------------                      ---------- --------------------                      ---------- ----------                                           --------------------                      ---------- --------------------
    AFFO                                                                                                                      $327,634             $327,634     $301,201            8.8 %                          $298,523          9.8 %
                                                                                                                  ==================== ====================                      ========== ====================                      ========== ==========                                           ====================                      ========== ====================
                                                                                                                                
    Per Share Amounts (Fully Diluted Shares):                                                                                                      
    AFFO Per Share                                                                                                               $1.11                $1.11        $1.02            8.8 %                             $1.02          8.8 %
                                                                                                                                
    Weighted Average Common Shares Outstanding - Basic                                                                         292,328              292,328      292,148            0.1 %                           291,227          0.4 %
    
    (1) Includes customer and supplier relationship value, intake costs, acquisition of customer relationships, capitalized commissions and other intangibles. Effective Q4 2023, our AFFO definition has been updated to exclude the amortization of capitalized commissions. Amortization expense of capitalized commissions was $11.0M and $11.7M for quarters ended December 31, 2023 and 2022 respectively, and $11.0M for quarter ended September 30, 2023.
    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    

    Adjusted Funds From Operations, or AFFO

    We define adjusted funds from operations ("AFFO") as FFO (Normalized) (1) excluding (i) non-cash rent expense (income), (ii) depreciation on non-real estate assets, (iii) amortization expense associated with customer and supplier relationship value, intake costs, acquisitions of customer and supplier relationships and other intangibles, (iv) amortization of deferred financing costs and debt discount/premium, (v) revenue reduction associated with amortization of customer inducements and above- and below-market data center leases and (vi) the impact of reconciling to normalized cash taxes and (2) including recurring capital expenditures. We also adjust for these items to the extent attributable to our portion of unconsolidated ventures. We believe that AFFO, as a widely recognized measure of operations of REITs, is helpful to investors as a meaningful supplemental comparative performance measure to other REITs, including on a per share basis. AFFO should be considered in addition to, but not as a substitute for, other measures of financial performance reported in accordance with GAAP, such as operating income, net income (loss) or cash flows from operating activities (as determined in accordance with GAAP). Effective Q4 2023, our AFFO definition has been updated to exclude amortization of capitalized commissions. With this change, our calculation more accurately represents our funds available to support growth, and is more comparable to our peers, including those in the data center industry.

    AFFO per share

    AFFO divided by weighted average fully-diluted shares outstanding.

    Full Year Reconciliation of Net Income (Loss) to FFO and AFFO
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands, except per-share data)
                                                                                                  Full Year 2023             Full Year 2023                      Full Year 2022                         % Change
                                                                                                                  -------------------- ------------------------------                       ----------------------------------                       ------------------------------
                                                                                                                                    
    Net Income                                                                                                                $187,263   $187,263           $562,149          (66.7 )%
                                                                                                                                                       
      Add / (Deduct):
                                                                                                                               322,045    322,045            307,895            4.6 %
        Real Estate Depreciation (1)
                                                                                                                               (16,656    (16,656 )                             (94,059 )                           (82.3 )%
        (Gain) Loss on Sale of Real Estate, Net of Tax
                                                                                                                                22,322     22,322             16,955           31.7 %
        Data Center Lease-Based Intangible Assets Amortization (2)
                                                                                                                                 2,226      2,226     --            n/a  
        Our Share of FFO (Nareit) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- ---------- --------------------                      -------------- --------------------                      ---------- --------------------
    FFO (Nareit)                                                                                                              $517,200   $517,200           $792,940          (34.8 )%
                                                                                                                                                       
      Add / (Deduct):
                                                                                                                                25,875     25,875             47,746          (45.8 )%
        Acquisition and Integration Costs
                                                                                                                               175,215    175,215             41,933            n/a  
        Restructuring and Other Transformation
                                                                                                                                 4,307      4,307              1,564          175.4 %
        Loss (Gain) on Disposal/Write-Down of PP&E, Net (Excluding Real Estate)
                                                                                                                                98,891     98,891            (83,268 )                             n/a  
        Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                73,799     73,799             56,861           29.8 %
        Stock-Based Compensation Expense
                                                                                                                                21,097     21,097              9,100          131.8 %
        Non-Cash Amortization Related to Derivative Instruments
                                                                                                                                12,019     12,019             13,197           (8.9 )%
        Real Estate Financing Lease Depreciation
                                                                                                                               (35,307    (35,307 )                             (25,190 )                            40.2 %
        Tax Impact of Reconciling Items and Discrete Tax Items (3)
                                                                                                                                  (374       (374 )                               2,874         (113.0 )%
        Our Share of FFO (Normalized) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- ---------- --------------------                      -------------- --------------------                      ---------- --------------------
    FFO (Normalized)                                                                                                          $892,722   $892,722           $857,757            4.1 %
                                                                                                                  ==================== ========== ====================                      ============== ====================                      ========== ====================
    Per Share Amounts (Fully Diluted Shares):                                                                                                          
    FFO (Nareit)                                                                                                                 $1.76      $1.76              $2.71          (35.1 )%
    FFO (Normalized)                                                                                                             $3.04      $3.04              $2.93            3.8 %
                                                                                                                                    
    Weighted Average Common Shares Outstanding - Basic                                                                         291,936    291,936            290,812            0.4 %
    
    (1) Includes depreciation expense related to owned real estate assets (land improvements, buildings, building improvements, leasehold improvements and racking), excluding depreciation related to real estate financing leases.
    (2) Includes amortization expense for Data Center In-Place Lease Intangible Assets and Data Center Tenant Relationship Intangible Assets.
    
    Full Year Reconciliation of Net Income (Loss) to FFO and AFFO (continued)
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands, except per-share data)
                                                                                                  Full Year 2023             Full Year 2023                    Full Year 2022                       % Change
                                                                                                                  -------------------- ------------------------------                       ------------------------------                       ------------------------------
                                                                                                                                
    FFO (Normalized)                                                                                                          $892,722   $892,722       $857,757            4.1 %
                                                                                                                                                   
      Add / (Deduct):
                                                                                                                               191,785    191,785        157,892           21.5 %
        Non-Real Estate Depreciation
                                                                                                                               227,987    227,987        231,656           (1.6 )%
        Amortization Expense (1)
                                                                                                                                16,859     16,859         18,044           (6.6 )%
        Amortization of Deferred Financing Costs
                                                                                                                                 7,036      7,036          8,119          (13.3 )%
        Revenue Reduction Associated with Amortization of Customer Inducements and Above- and Below-Market Leases
                                                                                                                                25,140     25,140         19,056           31.9 %
        Non-Cash Rent Expense (Income)
                                                                                                                               (14,826    (14,826 )                          (3,622 )                             n/a  
        Reconciliation to Normalized Cash Taxes
                                                                                                                                 4,868      4,868          4,135           17.7 %
        Our Share of AFFO Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                                                   
      Less:
                                                                                                                               140,406    140,406        142,496           (1.5 )%
        Recurring Capital Expenditures
                                                                                                                  -------------------- ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    AFFO                                                                                                                    $1,211,165 $1,211,165     $1,150,541            5.3 %
                                                                                                                  ==================== ========== ====================                      ========== ====================                      ========== ====================
                                                                                                                                
    Per Share Amounts (Fully Diluted Shares):                                                                                                      
    AFFO Per Share                                                                                                               $4.12      $4.12          $3.93            4.8 %
                                                                                                                                
    Weighted Average Common Shares Outstanding - Basic                                                                         291,936    291,936        290,812            0.4 %
    
    (1) Includes customer and supplier relationship value, intake costs, acquisition of customer relationships, capitalized commissions and other intangibles. Effective Q4 2023, our AFFO definition has been updated to exclude the amortization of capitalized commissions. Amortization expense of capitalized commissions was $43.4M and $40.6M for full year 2023 and 2022, respectively.
    
    Reconciliation of Net Income (Loss) to FFO and AFFO (Recast to Updated Calculation)
    -------------------------------------------------------------------------------------------------------------
    (Dollars in thousands, except per-share data)
                                                                                                     Full Year                    Full Year                            Q1 2023                           Q2 2023                           Q3 2023                           Q4 2023                          Full Year
                                                                                                                          2022                         2022                                                                                                                                                                                                                                                                       2023
                                                                                                                  -------------------- ----------------------------------                       ------------------------------                       ------------------------------                       ------------------------------                       ------------------------------                       ------------------------------
                                                                                                                                                                                 
    Net Income                                                                                                                $562,149       $562,149        $65,535         $1,143        $91,391        $29,194       $187,263  
                                                                                                                                                                                                    
      Add / (Deduct):
                                                                                                                               307,895        307,895         76,129         81,558         80,430         83,928        322,045  
        Real Estate Depreciation (1)
                                                                                                                               (94,059        (94,059 )                         (15,746 )                          (1,853 )                             750            193        (16,656 )
        (Gain) Loss on Sale of Real Estate, Net of Tax
                                                                                                                                16,955         16,955          6,129          4,907          7,482          3,804         22,322  
        Data Center Lease-Based Intangible Assets Amortization (2)
                                                                                                                        -- --            132            562            679            853          2,226  
        Our Share of FFO (Nareit) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- -------------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    FFO (Nareit)                                                                                                              $792,940       $792,940       $132,179        $86,317       $180,732       $117,972       $517,200  
                                                                                                                                                                                                               
      Add / (Deduct):
                                                                                                                                47,746         47,746          1,595          1,511          9,909         12,860         25,875  
        Acquisition and Integration Costs
                                                                                                                                41,933         41,933         36,913         45,588         38,861         53,853        175,215  
        Restructuring and Other Transformation
                                                                                                                                 1,564          1,564          4,550         (1,417 )                          (5,116 )                           6,290          4,307  
        Loss (Gain) on Disposal/Write-Down of PP&E, Net (Excluding Real Estate)
                                                                                                                               (83,268        (83,268 )                          17,491         58,694        (17,626 )                          40,332         98,891  
        Other Expense (Income), Net, Excluding our Share of Losses (Gains) from our Unconsolidated Joint Ventures
                                                                                                                                56,861         56,861         12,509         22,373         18,313         20,604         73,799  
        Stock-Based Compensation Expense
                                                                                                                                 9,100          9,100          5,834          5,817          5,270          4,176         21,097  
        Non-Cash Amortization Related to Derivative Instruments
                                                                                                                                13,197         13,197          2,988          3,008          3,001          3,022         12,019  
        Real Estate Financing Lease Depreciation
                                                                                                                               (25,190        (25,190 )                          (6,893 )                         (13,278 )                         (10,220 )                         (13,050 )                         (35,307 )
        Tax Impact of Reconciling Items and Discrete Tax Items (3)
                                                                                                                                 2,874          2,874            226           (500 )                             (44 )                             (56 )                            (374 )
        Our Share of FFO (Normalized) Reconciling Items from our Unconsolidated Joint Ventures
                                                                                                                  -------------------- -------------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    FFO (Normalized)                                                                                                          $857,757       $857,757       $207,392       $208,113       $223,080       $246,005       $892,722  
    Add / (Deduct):                                                                                                                                                                                            
                                                                                                                               157,892        157,892         40,948         49,765         49,500         51,572        191,785  
        Non-Real Estate Depreciation
                                                                                                                               231,656        231,656         55,899         56,131         58,344         57,613        227,987  
        Amortization Expense (1)
                                                                                                                                18,044         18,044          4,332          3,763          5,485          3,278         16,859  
        Amortization of Deferred Financing Costs
                                                                                                                                 8,119          8,119          1,760          1,732          1,715          1,829          7,036  
        Revenue Reduction Associated with Amortization of Customer Inducements and Above- and Below-Market Leases
                                                                                                                                19,056         19,056          7,436          6,603          6,119          4,982         25,140  
        Non-Cash Rent Expense (Income)
                                                                                                                                (3,622         (3,622 )                           3,157         (8,575 )                          (8,364 )                           7,090        (14,826 )
        Reconciliation to Normalized Cash Taxes
                                                                                                                                 4,135          4,135          1,981          2,525            182            181          4,868  
        Our Share of AFFO Reconciling Items from our Unconsolidated Joint Ventures
    Less:                                                                                                                                                                                                      
                                                                                                                               142,496        142,496         27,663         32,967         34,861         44,916        140,406  
        Recurring Capital Expenditures
                                                                                                                  -------------------- -------------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------                      ---------- --------------------
    AFFO                                                                                                                    $1,150,541     $1,150,541       $295,242       $287,090       $301,201       $327,634     $1,211,165  
                                                                                                                                                                                            
    Per Share Amounts (Fully Diluted Shares):                                                                                                                                                                  
                                                                                                                                 $2.71          $2.71          $0.45          $0.29          $0.61          $0.40          $1.76  
        FFO (Nareit)
                                                                                                                                 $2.93          $2.93          $0.71          $0.71          $0.76          $0.83          $3.04  
        FFO (Normalized)
                                                                                                                                                                                            
                                                                                                                                 $3.93          $3.93          $1.01          $0.98          $1.02          $1.11          $4.12  
        AFFO Per Share
                                                                                                                                                                                            
    Weighted Average Common Shares Outstanding - Basic                                                                         290,812        290,812        291,442        291,825        292,148        292,328        291,936  
    

    View source version on businesswire.com: https://www.businesswire.com/news/home/20240222831982/en/

    SOURCE: Iron Mountain Incorporated

    <img alt="" src="https://cts.businesswire.com/ct/CT?id=bwnews&sty=20240222831982r1&sid=cmtx6&distro=nx&lang=en" style="width:0;height:0" />

    Investor Relations:
    
    
    Gillian Tiltman
    SVP, Head of Investor Relations
    Gillian.Tiltman@ironmountain.com 
    (617) 286-4881
    
    
    Erika Crabtree
    Manager, Investor Relations
    Erika.Crabtree@ironmountain.com 
    (617) 535-2845
    

    COMTEX_448173800/1006/2024-02-22T06:45:01

    Iron Mountain Reports Fourth Quarter and Full Year 2023 Results
    6:45a ET February 22 '24 BusinessWire
    Iron Mountain Schedules Fourth Quarter and Full Year 2023 Earnings Re...
    7:00a ET February 1 '24 BusinessWire

    Market data provided by News provided by