Exhibit 99.1

FOR IMMEDIATE RELEASE

Contact:   Stephen P. Golden
           Director of Investor Relations
           (617) 535-4799

     Iron Mountain Incorporated Reports First Quarter 2003 Financial Results

         o        Total Revenues are $352 Million, Up 11%
         o        Income From Continuing  Operations Before  Extraordinary Items
                  is $0.25 per Diluted Share
         o        Operating Income is $72 Million, Up 26%
         o        EBITDA Reaches $104 Million, Up 30%

Boston, MA - April 30, 2003 - Iron Mountain Incorporated (NYSE: IRM), the leader
in records and information management services,  today reported higher revenues,
EBITDA and  earnings  for the quarter  ended March 31,  2003.  The Company  also
reported that it generated $72 million of operating  income,  an increase of 26%
over the first quarter of 2002.

Iron Mountain's total consolidated revenues for the quarter ended March 31, 2003
grew to $352  million,  an increase of 11% compared with the quarter ended March
31, 2002.  Storage revenues increased to $203 million for the first quarter from
$183 million for the same period in 2002. Storage revenues, which are considered
a key performance indicator for the records and information  management services
industry,  are largely recurring since customers  typically retain their records
for many years. This marks the 57th consecutive  quarter for which Iron Mountain
has reported  increased storage revenues.  For the quarter ended March 31, 2003,
total internal revenue growth was 8%.

Richard Reese, the Company's Chairman and CEO, stated, "The Company posted solid
results for the first quarter--revenues were within expectations and our margins
were exceptionally strong. Storage growth rates remained stable however, service
revenue growth rates,  particularly  for  complementary  services were down from
last year's  levels.  As planned,  we are increasing our investment in our sales
and sales support resources, particularly in the digital services and enterprise
solutions   and  services   arenas  to  take   advantage   of  emerging   market
opportunities."

EBITDA (earnings from continuing operations before interest, taxes, depreciation
and amortization) was $104 million, or 29.6% of revenues,  for the quarter ended
March 31, 2003  compared to $80 million,  or 25.2% of revenues,  for the quarter
ended March 31,  2002.  Operating  income for the first  quarter of 2003 was $72
million,  or 20.5% of revenues,  compared to $57 million,  or 18.0% of revenues,
for the same period in 2002.

Iron  Mountain  believes  that  EBITDA is useful to  investors  because it is an
important  financial  measure used in evaluating the Company's  performance,  as
EBITDA is an internally  generated  source of funds for  investment in continued
growth and for servicing indebtedness.  Internally, Iron Mountain uses EBITDA as
the basis for  evaluating the  performance  of and  allocating  resources to its
operating  segments.  Externally,  holders of the Company's publicly issued debt
use EBITDA and  EBITDA-based  calculations as important  criteria for evaluating
the Company and, as a result,  all of its bond indentures and covenants  include
EBITDA  and   EBITDA-based   calculations  as  primary   measures  of  financial
performance.  However,  EBITDA is subject to foreign currency  fluctuations and,
under new accounting rules, debt extinguishment charges. As a result,  operating
income,  which is less  affected by these  items,  is  emerging as an  important
measure of the Company's financial performance.

                                   -- more --



Iron Mountain Reports First Quarter 2003 Financial Results / Page 2

Below is a reconciliation of Operating Income to EBITDA:



                                                                                          Quarter Ended
                               Reconciliation of Operating Income to EBITDA                 March 31,
                                                                                 --------------------------------
                                                                                     2002                2003
                                                                                 ---------------   --------------

                                                                                                 
Operating Income                                                                   $  57,184           $  72,227

Add:  Depreciation and Amortization                                                   25,156              29,949
                                                                                   ---------           ---------
                                                                                      82,340             102,176

Less:  Other (Income) Expense, net                                                     1,312              (3,260)
           Minority Interests in Earnings of Subsidiaries                                957               1,300
                                                                                   ---------           ---------

EBITDA (Earnings before Interest, Taxes, Depreciation and
     Amortization)
                                                                                   $  80,071           $ 104,136
                                                                                   =========           =========

Digital Operating Losses Included Above                                            $  (1,817)          $  (4,764)



Other (Income)  Expense,  net for the first quarter of 2003 is comprised of a $5
million  foreign  currency  gain,  due  primarily  to the  strengthening  of the
Canadian dollar against the U.S. dollar, partially offset by a $2 million charge
for the early  extinguishment of debt related to the redemption of the Company's
9-1/8%  notes.  The  Company  expects  to record a charge of  approximately  $14
million in the second quarter ending June 30, 2003, for the early extinguishment
of debt related to the redemption of the Company's 8-3/4% notes.  Other (Income)
Expense,  net for the  first  quarter  of 2002 is  comprised  primarily  of a $1
million charge for the early  extinguishment  of debt related to the refinancing
of the Company's revolving credit facility.

Income from continuing operations before extraordinary items was $21 million, or
$0.25 per diluted share, for the first quarter of 2003, compared to $13 million,
or $0.15 per  diluted  share,  for the same  period in 2002.  Net Income for the
first quarter of 2003 was $21 million,  or $0.25 per diluted share,  compared to
$6 million, or $0.07 per diluted share, for the same period in 2002.

During the first quarter of 2003,  the Company  completed the  redemption of its
9-1/8%  notes  by  retiring  the  $23  million  of  aggregate  principal  amount
outstanding  at year-end.  The Company also  exchanged $31 million of its 7-3/4%
notes for $30  million of its  outstanding  8-3/4%  notes.  In April  2003,  the
Company sold $300 million of its 7-3/4% notes at 104.0% of par, which implies an
effective  yield to worst of 7.066%.  The net  proceeds  to the  Company of $307
million  will be used to fund  the  Company's  offer  to  purchase  and  consent
solicitation  for its 8-3/4% notes, or to otherwise redeem the 8-3/4% notes, and
for general corporate purposes,  including the repayment of borrowings under its
revolving credit  agreement,  the possible  repayment of other  indebtedness and
possible future acquisitions.

Iron Mountain  completed 3 acquisitions since the end of 2002 serving markets in
France, Texas and Louisiana.  These acquisitions were announced in the Company's
fourth  quarter 2002 earnings  release and were included in the 2003 guidance at
that time.

                                   -- more --


Iron Mountain Reports First Quarter 2003 Financial Results / Page 3

                          Financial Performance Outlook

The following  statements are based on current  expectations  and do not include
the  potential  impact  of  any  future   acquisitions.   These  statements  are
forward-looking,  and actual results may differ materially.  Please refer to the
cautionary  language  included  in this  press  release  when  considering  this
information.  The Company  undertakes no obligation to update this  information.
The Company is providing the following financial guidance for the quarter ending
June 30, 2003 and the full year ending December 31, 2003 (dollars in millions):


                                                             Full Year Ending December 31, 2003
                                                          -----------------------------------------
                                     Quarter Ending
                                      June 30, 2003            Previous                Current
                                   -----------------      ----------------        ------------------
                                    Low        High          Low     High            Low      High
                                   -------   -------      -------  -------        --------   -------
                                                                            
Revenues                           $355       $365        $ 1,440   $1,480         $ 1,440    $1,480
Operating Income                     68         73            270      290             270       290
Depreciation & Amortization               30                                          127       123
EBITDA                               83         88            390      405             376       392

Capital Expenditures                                          190      215             190       215
Internal Growth                                                9%      11%              9%       11%

The Company's  second quarter and full year 2003 guidance with respect to EBITDA
includes a charge for the early extinguishment of debt related to the redemption
of its 8-3/4% notes of  approximately  $14 million.  In addition,  the full year
2003 guidance  includes the $2 million  charge for the early  extinguishment  of
debt  related  to the  redemption  of the  Company's  9-1/8%  notes in the first
quarter of 2003. In addition,  the Company has not included any foreign currency
effects, actual or forecasted, or additional debt extinguishment charges for the
second quarter or full-year 2003.  Minority interest is assumed to be $5 million
for the full year 2003.  Following is a  reconciliation  of operating  income to
EBITDA with respect to the aforementioned guidance (dollars in millions):


                                                                                 Full Year Ending December 31, 2003
                                                                          -------------------------------------------
Reconciliation of Operating Income to EBITDA       Quarter Ending
                                                    June 30, 2003              Previous                 Current
                                                --------------------      -----------------       ------------------
                                                   Low        High          Low       High         Low         High
                                                ----------  --------      --------  --------      -------     ------
                                                                                            
Operating Income                                   $ 68       $ 73         $ 270     $ 290        $ 270       $ 290

Add:  Depreciation and Amortization                  30         30           125       120          127         123
                                                   ----       ----         -----     -----        -----       -----
                                                     98        103           395       410          397         413
Less:  Other Expense (1)                             14         14            --        --           16          16
       Minority Interest in Earnings of
         Subsidiaries                                 1          1             5         5            5           5
                                                   ----       ----         -----     -----        -----       -----

EBITDA                                             $ 83       $ 88         $ 390     $ 405        $ 376       $ 392
                                                   ====       ====         =====     =====        =====       =====
- ------------------
<FN>
  (1)    Other Expense includes charges related to the early  extinguishment  of
         debt of $14 million  and $16  million  for the second  quarter and full
         year  2003,  respectively  related  to the  Company's  first and second
         quarter 2003 refinancing events.
</FN>

Iron  Mountain's  conference  call to discuss the first  quarter 2003  financial
results will be held today at 11:00 am eastern time. In order to further enhance
the overall quality of its investor  communications,  the Company will simulcast
the conference call on its website at www.ironmountain.com. A slide presentation
providing summary  financial and statistical  information that will be discussed
on the  conference  call will also be posted to the  website and  available  for
real-time  viewing.  The slide  presentation  and replays of the conference call
will be available on the website for future reference.

                                   -- more --

Iron Mountain Reports First Quarter 2003 Financial Results / Page 4

About Iron Mountain

Iron Mountain Incorporated is the world's trusted partner for outsourced records
and information  management services.  Founded in 1951, the Company has grown to
service  more than  150,000  customer  accounts  throughout  the United  States,
Canada,  Europe and Latin  America.  Iron  Mountain  offers  records  management
services  for  both  physical  and  digital  media,  disaster  recovery  support
services,  and consulting - services that help  businesses save money and manage
risks  associated  with legal and  regulatory  compliance,  protection  of vital
information,  and business continuity  challenges.  For more information,  visit
www.ironmountain.com.

                            Certain Important Factors

This  press  release  contains  certain  forward-looking  statements  within the
meaning of the Private Securities  Litigation Reform Act of 1995, and is subject
to the safe-harbor created by such Act.  Forward-looking  statements include our
second quarter and full year 2003 financial  performance  outlook and statements
regarding  our  goals,  beliefs,   strategies,   objectives,  plans  or  current
expectations.  These statements  involve known and unknown risks,  uncertainties
and other factors that may cause the actual  results to be materially  different
from those contemplated in the forward-looking statements. Such factors include,
but are not limited to: (i) changes in customer  preferences  and demand for the
Company's  services;  (ii)  changes  in the  price  for the  Company's  services
relative to the cost of providing such services; (iii) the cost and availability
of financing for contemplated growth; (iv) the Company's ability or inability to
complete  acquisitions on satisfactory terms and to integrate acquired companies
efficiently;  (v) in the  various  digital  businesses  on which the  Company is
embarking,  capital  and  technical  requirements  will be beyond the  Company's
means,  markets for the Company's services will be less robust than anticipated,
or competition will be more intense than anticipated;  (vi) the possibility that
business  partners upon which the Company  depends for  technical  assistance or
management and acquisition  expertise outside the United States will not perform
as anticipated;  (vii) changes in the political and economic environments in the
countries in which the Company's international  subsidiaries operate; and (viii)
other trends in competitive  or economic  conditions  affecting Iron  Mountain's
financial  condition or results of operations not presently  contemplated.  Iron
Mountain undertakes no obligation to release publicly the result of any revision
to these  forward-looking  statements  that  may be made to  reflect  events  or
circumstances   after  the  date  hereof  or  to  reflect  the   occurrence   of
unanticipated events.


NOTE: Condensed Consolidated Financial Statements of Iron Mountain Incorporated
follow.



Iron Mountain Reports First Quarter 2003 Financial Results / Page 5


                                                   IRON MOUNTAIN INCORPORATED
                                         CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                          (Amounts in Thousands except Per Share Data)
                                                           (Unaudited)
                                                                                                            Three Months Ended
                                                                                                                  March 31,
                                                                                                         ----------------------
                                                                                                           2002           2003
                                                                                                         ---------    ---------
                                                                                                               
REVENUES:
    Storage                                                                                              $ 183,436    $ 202,831
    Service and Storage Material Sales                                                                     133,762      148,980
                                                                                                         ---------    ---------
          Total Revenues                                                                                   317,198      351,811

OPERATING EXPENSES:
    Cost of Sales (Excluding Depreciation)                                                                 152,446      160,151
    Selling, General and Administrative                                                                     82,194       91,156
    Depreciation and Amortization                                                                           25,156       29,949
    Merger-Related Expenses                                                                                    300         --
    Gain on Disposal/Writedown of Property, Plant and Equipment, Net                                           (82)      (1,672)
                                                                                                         ---------    ---------
          Total Operating Expenses                                                                         260,014      279,584
                                                                                                         ---------    ---------

OPERATING INCOME                                                                                            57,184       72,227

INTEREST EXPENSE, NET                                                                                       32,880       35,565
OTHER EXPENSE (INCOME), NET                                                                                  1,312       (3,260)
                                                                                                         ---------    ---------
          Income from Continuing Operations Before Provision for Income Taxes and Minority Interest         22,992       39,922

PROVISION FOR INCOME TAXES                                                                                   9,517       17,338
MINORITY INTEREST IN EARNINGS OF SUBSIDIARIES                                                                  957        1,300
                                                                                                         ---------    ---------

          Income from Continuing Operations Before Cumulative Effect of Change in Accounting Principle      12,518       21,284
CUMULATIVE EFFECT OF CHANGE IN ACCOUNTING PRINCIPLE  (NET OF MINORITY INTEREST) (1)                         (6,396)        --
                                                                                                         ---------    ---------
          Net Income                                                                                     $   6,122    $  21,284
                                                                                                         =========    =========

INCOME FROM CONTINUING OPERATIONS BEFORE CUMULATIVE EFFECT OF CHANGE IN ACCOUNTING
          PRINCIPLE PER SHARE - BASIC                                                                    $    0.15    $    0.25
                                                                                                         =========    =========

INCOME FROM CONTINUING OPERATIONS BEFORE CUMULATIVE EFFECT OF CHANGE IN ACCOUNTING
          PRINCIPLE PER SHARE - DILUTED                                                                  $    0.15    $    0.25
                                                                                                         =========    =========

NET INCOME PER SHARE - BASIC                                                                             $    0.07    $    0.25
                                                                                                         =========    =========
NET INCOME PER SHARE - DILUTED                                                                           $    0.07    $    0.25
                                                                                                         =========    =========

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - BASIC                                                          84,372       85,097
                                                                                                         =========    =========
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - DILUTED                                                        86,002       86,551
                                                                                                         =========    =========

EBITDA                                                                                                   $  80,071    $ 104,136
                                                                                                         =========    =========

<FN>
(1)     Represents  the non-cash  charge  related to the  impairment of goodwill
        associated with the Company's  investment in South America due primarily
        to the  deterioration of the economy and the devaluation of the currency
        in Argentina.
</FN>

                                  -- more --

Iron Mountain Reports First Quarter 2003 Financial Results / Page 6



                           IRON MOUNTAIN INCORPORATED
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                             (Amounts in Thousands)
                                   (Unaudited)



                                                           December 31,      March 31,
                                                               2002            2003
                                                           ------------    -----------
                                                                    
ASSETS

CURRENT ASSETS:
    Cash and Cash Equivalents                               $    56,292    $    13,581
    Accounts Receivable (less allowances of $20,274
       and $20,316, respectively)                               225,416        248,973
    Other Current Assets                                         85,332         76,697
                                                            -----------    -----------
               Total Current Assets                             367,040        339,251
                                                            -----------    -----------

PROPERTY, PLANT AND EQUIPMENT:
    Property, Plant and Equipment at Cost                     1,577,588      1,643,511
    Less: Accumulated Depreciation                             (338,400)      (367,717)
                                                            -----------    -----------
               Property, Plant and Equipment, net             1,239,188      1,275,794
                                                            -----------    -----------

OTHER ASSETS:
    Goodwill, net                                             1,544,974      1,572,663
    Other Non-current Assets, net                                79,453         81,162
                                                            -----------    -----------
               Total Other Assets                             1,624,427      1,653,825
                                                            -----------    -----------

               Total Assets                                 $ 3,230,655    $ 3,268,870
                                                            ===========    ===========

LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES:
    Current Portion of Long-term Debt                       $    69,732    $    43,858
    Other Current Liabilities                                   358,230        353,083
                                                            -----------    -----------
               Total Current Liabilities                        427,962        396,941

LONG-TERM DEBT, NET OF CURRENT PORTION                        1,662,365      1,679,861
OTHER LONG-TERM LIABILITIES                                     133,335        148,015

MINORITY INTERESTS                                               62,132         67,641

SHAREHOLDERS' EQUITY                                            944,861        976,412
                                                            -----------    -----------

               Total Liabilities and Shareholders' Equity   $ 3,230,655    $ 3,268,870
                                                            ===========    ===========





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