IRON MOUNTAIN INC /DE
8-K, 1999-07-29
PUBLIC WAREHOUSING & STORAGE
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

                          Date of Report: July 29, 1999

                           IRON MOUNTAIN INCORPORATED
             (Exact name of registrant as specified in its charter)

     Delaware                        0-27584                  04-3107342
 (State or other                   (Commission              (IRS Employer
jurisdiction of                    File Number)           Identification No.)
incorporation)


                               745 Atlantic Avenue
                           Boston, Massachusetts 02111
          (Address of principal executive offices, including zip code)




                                 (617) 535-4766
              (Registrant's telephone number, including area code)


<PAGE>



Item 5.  Other Events

         On July 29, 1999, Iron Mountain  Incorporated (the "Company") announced
certain  financial  information  for the fiscal quarter ended June 30, 1999. For
more information, see the Company's press release, dated July 29, 1999, which is
attached herewith as Exhibit 99 and incorporated by reference herein.

Item 7.  Financial Statements, Pro Form Financial Information and Exhibits

(c)      Exhibits.

Exhibit No.                Item
- -----------                ----

10.1              Amendment  No. 3 to the Second  Amended  and  Restated  Credit
                  Agreement,  dated as of February 26, 1999, among Iron Mountain
                  Incorporated,   the  lenders   party  thereto  and  The  Chase
                  Manhattan Bank, as Administrative Agent.

10.2              Amendment  No. 4 to the Second  Amended  and  Restated  Credit
                  Agreement,  dated as of April 16,  1999,  among Iron  Mountain
                  Incorporated,   the  lenders   party  thereto  and  The  Chase
                  Manhattan Bank, as Administrative Agent.

10.3              Amendment  No. 5 to the Second  Amended  and  Restated  Credit
                  Agreement,  dated as of July 14,  1999,  among  Iron  Mountain
                  Incorporated,   the  lenders   party  thereto  and  The  Chase
                  Manhattan Bank, as Administrative Agent.

99                Press Release, dated July 29, 1999.



                                        2

<PAGE>



                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                     IRON MOUNTAIN INCORPORATED
                                     (Registrant)



                                     By:  /s/  Jean A. Bua
                                         Jean A. Bua
                                         Vice President and Corporate Controller


Date:   July 29, 1999




                                        3



                                 AMENDMENT NO. 3

                  AMENDMENT  NO. 3 (this  "Agreement")  dated as of February 26,
1999 among IRON MOUNTAIN  INCORPORATED,  a Delaware corporation (the "Company");
each of the lenders (the "Lenders")  listed on the signature  pages hereof;  and
THE CHASE  MANHATTAN  BANK,  as  administrative  agent for the Lenders under the
Credit  Agreement  referred  to below  (in such  capacity,  the  "Administrative
Agent").

                  The  Company,  the  Lenders and the  Administrative  Agent are
parties to a Second Amended and Restated Credit  Agreement dated as of September
26,  1997 (as from time to time  amended,  the "Credit  Agreement"),  providing,
subject to the terms and  conditions  thereof,  for extensions of credit (by the
making of loans and the  issuing of  letters  of  credit) by the  Lenders to the
Company in an aggregate principal or face amount not exceeding $250,000,000. The
Company  has  requested  the  Lenders to amend the Credit  Agreement  in certain
respects,  and the Lenders are willing to so amend the Credit Agreement,  all on
the terms and conditions set forth herein.
Accordingly, the parties hereto hereby agree as follows:

                  Section 1.  Definitions.  Except as otherwise  defined in this
Agreement,  terms  defined in the Credit  Agreement  are used  herein as defined
therein.

                  Section  2.  Amendments.  Subject  to (i)  the  Administrative
Agent's receipt of counterparts of this Agreement,  duly executed by each of the
Company,  the Majority Lenders and the  Administrative  Agent,  (ii) the written
consent and  agreement  hereto by the  Subsidiary  Guarantors as provided at the
foot hereof and (iii) payment by the Company to the Administrative Agent of such
fees as the  Company  shall  have  agreed  to pay in  connection  herewith,  but
effective  as of the date  hereof,  the Credit  Agreement  is hereby  amended as
follows:

                  A.  Definitions.  Section  1.01  of the  Credit  Agreement  is
amended by inserting the following definitions in their appropriate alphabetical
locations  (or, in the case of any  definition for a term that is defined in the
Credit  Agreement  before  giving  effect to this  Agreement,  by  amending  and
restating such definition to read as set forth below):

                  "1999 Senior Subordinated Debt" shall mean Indebtedness of the
         Company in an aggregate principal amount not exceeding  $300,000,000 to
         be issued  (in one or more  offerings)  by the  Company  on or prior to
         February 26, 2000 that is (i)  subordinated  in right of payment to the
         obligations  of the Company  hereunder  and under the Notes to at least
         the same extent as the 1996 Senior Subordinated Debt and (ii) otherwise
         on terms and  conditions,  and  pursuant to  documentation,  reasonably
         satisfactory to the Administrative Agent and the Majority Lenders.

                  "1999  Senior  Subordinated  Debt  Indenture"  shall  mean the
         indenture among the Company and a trustee to be identified, as the same
         may be amended or  modified,  without  prejudice to the  provisions  of
         Section  9.20  hereof,  providing  for the  issuance of the 1999 Senior
         Subordinated Debt.

                                Amendment No. 3
<PAGE>
                                      -2-

                  "Rain  Acquisition"  shall  mean  that  certain   contemplated
         Acquisition  of the  business  referred to by the Company as "Rain" and
         certain  real  estate  owned by one or more  affiliates  of  Rain,  for
         Acquisition  Consideration  consisting of (x) Stock Consideration in an
         aggregate amount of up to $50,000,000  (determined in good faith by the
         Company  at the time of the  execution  of the  acquisition  agreements
         relating to the Rain  Acquisition)  and (y) cash in an aggregate amount
         of up to $70,000,000.

                  "Senior Subordinated Debt" shall mean, collectively,  the 1996
         Senior  Subordinated  Debt, the 1997 Senior  Subordinated  Debt and the
         1999 Senior Subordinated Debt.

                  "Senior    Subordinated    Debt   Indentures"    shall   mean,
         collectively,  the 1996 Senior  Subordinated  Debt Indenture,  the 1997
         Senior  Subordinated  Debt  Indenture and the 1999 Senior  Subordinated
         Indenture.

                  B. Letters of Credit.  Section 2.08 of the Credit Agreement is
hereby  amended by changing  the figure  "$10,000,000"  in clause  (ii)  thereof
(relating to Letter of Credit Liabilities) to read "$20,000,000".

                  C. Year  2000.  Section 8 of the  Credit  Agreement  is hereby
amended by adding new Section 8.18, to read as follows:

                  "8.18 Year 2000.  The Company  has (i)  initiated a review and
         assessment  of all  areas  within  its and  each  of its  Subsidiaries'
         business and operations that it reasonably  believes would be adversely
         affected by the "Year 2000  Problem"  (that is, the risk that  computer
         applications  used by the  Company  or any of its  Subsidiaries  may be
         unable to  recognize  and  perform  properly  date-sensitive  functions
         involving certain dates prior to, in and following the year 2000), (ii)
         developed  a plan for  addressing  the Year  2000  Problem  on a timely
         basis,  and (iii) initiated  implementation  of that plan. Based on the
         foregoing,  the Company believes that any reprogramming or replacements
         required to permit the proper  functioning,  prior to, in and following
         the year  2000,  of (i) the  Company's  and  each of its  Subsidiaries'
         material  computer  systems and (ii) material  equipment of the Company
         and each of its Subsidiaries  containing embedded microchips (including
         systems and  equipment  supplied by others or with which the  Company's
         and each of its Subsidiaries'  systems  interface) and the verification
         of all such systems and equipment,  as so reprogrammed or replaced,  as
         the case may be, will be completed by September  30, 1999,  except that
         any such  reprogramming,  replacement and verification  with respect to
         systems  acquired  by the  Company in  Permitted  Acquisitions  will be
         completed by December 31, 1999. The cost to the Company and each of its
         Subsidiaries of such reprogramming or replacement,  as the case may be,
         and testing and of the reasonably foreseeable  consequences of the Year
         2000  Problem to the  Company and each of its  Subsidiaries  (including
         reprogramming  errors and the failure of others'  systems or equipment)
         will not, in the good faith belief of the Company,  result in a Default
         or have a Material Adverse Effect."

                                Amendment No. 3
<PAGE>
                                      -3-


                  D.  Indebtedness.  Without prejudice to Sections 9.09, 9.10 or
9.11 of the  Credit  Agreement,  clause  (iii)  of  Section  9.08 of the  Credit
Agreement is hereby amended to read as follows:

                  "(iii)  1997  Senior   Subordinated   Debt  in  an   aggregate
         outstanding principal amount not exceeding $300,000,000 and 1999 Senior
         Subordinated  Debt in an  aggregate  outstanding  principal  amount not
         exceeding $300,000,000;"

                  E. Mergers, Asset Dispositions, Etc. Paragraphs (a) and (b) of
Section 9.12 of the Credit Agreement are hereby amended to read as follows:

                  "(a) Maximum  Periodic  Consideration.  Without the consent of
         the Majority Lenders, the aggregate amount of Acquisition Consideration
         (including Stock  Consideration)  paid in respect of Acquisitions shall
         not exceed (i) $350,000,000 during the fourth quarter of 1997, provided
         that up to $175,000,000  may be carried forward to the first quarter of
         1998 solely in conjunction with the contemplated  acquisition currently
         referred to as the "Toy" acquisition if such acquisition occurs in such
         quarter,  or (ii)  $150,000,000  in any year  after  1997,  subject  to
         adjustment  as  provided  in  clause  (i)  herein;  provided  that  the
         aggregate   amount  of  Acquisition   Consideration   excluding   Stock
         Consideration  paid in  respect  of  Acquisitions  shall not exceed (x)
         $250,000,000  in the  fourth  quarter  of  1997,  provided  that  up to
         $125,000,000 may be carried forward to the first quarter of 1998 solely
         in conjunction with said "Toy"  acquisition if such acquisition  occurs
         in such quarter, or (y) $100,000,000 in any year after 1997, subject to
         adjustment as provided in clause (x) herein;  provided further that the
         Rain  Acquisition  shall, so long as (i) no Default has occurred and is
         continuing  at  the  time  of  such   Acquisition  and  (ii)  the  Rain
         Acquisition  complies with the requirements of this Section 9.12 (other
         than clauses (a) and (b) hereof),  (1) be excluded from the limitations
         set forth in this clause (a) and be disregarded in determining  whether
         any  other  Acquisition  in the  year  1999 is in  compliance  with the
         applicable Acquisition  Consideration limits set forth above and (2) be
         deemed  to be a  "Permitted  Acquisition"  for  all  purposes  of  this
         Agreement.

                  (b) Maximum Individual  Consideration.  Without the consent of
         the Majority Lenders,  the Acquisition  Consideration  (including Stock
         Consideration)  payable in respect of any single  Acquisition or series
         of related  Acquisitions  shall not exceed  $65,000,000,  provided that
         said "Toy" acquisition, the contemplated acquisition currently referred
         to as the "Health"  acquisition and the Rain  Acquisition  shall not be
         subject to the limitation in this clause (b)."

                  F.  General.  References  in the Credit  Agreement  (including
references to the Credit  Agreement as amended hereby) to "this  Agreement" (and
indirect references such as "hereunder",  "hereby", "herein" and "hereof") shall
be deemed to be references to the Credit Agreement as amended hereby.

                  Section 3. Representations and Warranties.  The Company hereby
represents and warrants to the Administrative Agent and the Lenders that:


                                Amendment No. 3
<PAGE>
                                      -4-

                  (a) the  representations  and  warranties  made by each of the
         Company and the  Subsidiary  Guarantors in each Basic Document to which
         it is a party (other than the  representations and warranties set forth
         in paragraphs (a) and (b) of Section 8.10 of the Credit  Agreement) are
         correct on and as of the date hereof,  as though made on and as of such
         date (or, if any such representation or warranty is expressly stated to
         have been made as of a specific date, as of such specific date); and

                  (b) no event has occurred and is continuing that constitutes a
         Default or an Event of Default  (and the  parties  agree that breach of
         any of the  representations  and  warranties  in this  Section  3 shall
         constitute  an Event of Default  under  Section  10.01(c) of the Credit
         Agreement).

                  Section  4.  Miscellaneous.  Except  as herein  provided,  the
Credit  Agreement and each of the other Basic Documents  shall remain  unchanged
and in full force and effect.  This  Agreement  may be executed in any number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument  and any of the parties  hereto may execute this Agreement by signing
any such  counterpart.  This  Agreement  shall be governed by, and  construed in
accordance with, the law of the State of New York.


                                Amendment No. 3
<PAGE>
                                      -5-


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective officers thereunto duly authorized,
as of the date first above written.

                                   THE COMPANY

                                   IRON MOUNTAIN INCORPORATED


                                   By  /s/ J.P. Lawrence
                                     Name:  J.P. Lawrence
                                     Title:  Vice President and Treasurer


                                   THE ADMINISTRATIVE AGENT

                                   THE CHASE MANHATTAN BANK


                                   By  /s/ Michael Lancia
                                     Name: Michael Lancia
                                     Title:  Vice President


                                   THE LENDERS

                                   THE CHASE MANHATTAN BANK


                                   By  /s/ Michael Lancia
                                     Name:  Michael Lancia
                                     Title:  Vice President


                                   BANKBOSTON, N.A.


                                   By  /s/ James F. Law
                                     Name: James F. Law
                                     Title: Vice President


                                Amendment No. 3
<PAGE>
                                      -6-



                                    THE BANK OF NEW YORK

                                    By  /s/ William G. C. Dakin
                                      Name: William G. C. Dakin
                                      Title: Vice President


                                    CIBC INC.


                                    By  /s/ Harold Birk
                                      Name: Harold Birk
                                      Title: Executive Director


                                    FLEET NATIONAL BANK


                                    By  /s/ Michael A. Palmer
                                      Name: Michael A. Palmer
                                      Title: Vice President


                                    CREDIT LYONNAIS NEW YORK BRANCH


                                    By  /s/ Vladimir Labun
                                      Name: Vladimir Labun
                                      Title: First Vice President - Manager


                                    US TRUST


                                    By  /s/ Anthony Wilson
                                      Name: Anthony Wilson
                                      Title: Senior Vice President



                                Amendment No. 3
<PAGE>
                                      -7-


                                   UNION BANK OF CALIFORNIA, N.A.


                                   By  /s/ Nancy A. Perkins
                                     Name: Nancy A. Perkins
                                     Title: Vice President


                                   THE BANK OF NOVA SCOTIA


                                   By  /s/ T. M. Pitcher
                                     Name: T. M. Pitcher
                                     Title:  Authorized Signatory


                                   HELLER FINANCIAL, INC.


                                   By  /s/ Linda W. Wolf
                                     Name: Linda W. Wolf
                                     Title: Senior Vice President


                                   NATIONAL CITY BANK


                                   By  /s/ Lisa B. Lisi
                                     Name: Lisa B. Lisi
                                     Title: Vice President


                                   ERSTE BANK DER OESTERREICHISCHEN
                                     SPARKASSEN AG (f/k/a GIROCREDIT BANK
                                     AG DER SPARKASSEN, GRAND CAYMAN
                                     ISLAND BRANCH)


                                   By  /s/ Arcinee Hovanessian
                                     Name: Arcinee Hovanessian
                                     Title: Vice President

                                   By  /s/ John S. Runnion
                                     Name: John S. Runnion
                                     Title: First Vice President

                                Amendment No. 3
<PAGE>
                                      -8-



CONSENTED TO AND AGREED:


IRON MOUNTAIN RECORDS MANAGEMENT, INC.
DSI TECHNOLOGY ESCROW SERVICES, INC.
IRON MOUNTAIN/SAFESITE, INC.
IRON MOUNTAIN CONSULTING SERVICES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO-FP, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO, INC.
CRITERION ATLANTIC PROPERTY, INC.
IM BILLERICA, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF MICHIGAN, INC.
IRON MOUNTAIN SAFE DEPOSIT CORPORATION
NATIONAL UNDERGROUND STORAGE, INC.
IRON MOUNTAIN OF MARYLAND, LLC
ARCUS DATA SECURITY, INC.
HIMSCORP OF PHILADELPHIA, INC.
RECORDKEEPERS, INC.
HIMSCORP OF PITTSBURGH, INC.
HIMSCORP OF CLEVELAND, INC.
HIMSCORP OF NEW ORLEANS, INC.
HIMSCORP OF PORTLAND, INC.
HIMSCORP OF SAN DIEGO, INC.
HIMSCORP OF DETROIT, INC.
HIMSCORP OF LOS ANGELES, INC.
HIMSCORP OF HOUSTON, INC.
IM-AEI ACQUISITION CORPORATION
IRON MOUNTAIN RECORDS MANAGEMENT OF UTAH, INC.
ARCUS STAFFING RESOURCES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF OHIO, INC.
IRON MOUNTAIN GLOBAL, INC.
ARCUS DATA SECURITY LLC

By  /s/ J. P. Lawrence
  Name: J.P. Lawrence
  Title: Vice President and Treasurer


                                Amendment No. 3



                                 AMENDMENT NO. 4

                  AMENDMENT NO. 4 (this  "Agreement") dated as of April 16, 1999
among IRON MOUNTAIN INCORPORATED,  a Delaware corporation (the "Company");  each
of the lenders (the  "Lenders")  listed on the signature  pages hereof;  and THE
CHASE MANHATTAN BANK, as  administrative  agent for the Lenders under the Credit
Agreement referred to below (in such capacity, the "Administrative Agent").

                  The  Company,  the  Lenders and the  Administrative  Agent are
parties to a Second Amended and Restated Credit  Agreement dated as of September
26,  1997 (as from time to time  amended,  the "Credit  Agreement"),  providing,
subject to the terms and  conditions  thereof,  for extensions of credit (by the
making of loans and the  issuing of  letters  of  credit) by the  Lenders to the
Company in an aggregate principal or face amount not exceeding $250,000,000. The
Company  has  requested  the  Lenders to amend the Credit  Agreement  in certain
respects,  and the Lenders are willing to so amend the Credit Agreement,  all on
the terms and conditions set forth herein.
Accordingly, the parties hereto hereby agree as follows:

                  Section 1.  Definitions.  Except as otherwise  defined in this
Agreement,  terms  defined in the Credit  Agreement  are used  herein as defined
therein.

                  Section  2.  Amendments.  Subject  to (i)  the  Administrative
Agent's receipt of counterparts of this Agreement,  duly executed by each of the
Company,  the Majority Lenders and the Administrative Agent and (ii) the written
consent and  agreement  hereto by the  Subsidiary  Guarantors as provided at the
foot hereof, but effective as of the date hereof, the Credit Agreement is hereby
amended as follows:

                  A.  Definitions.  Section  1.01  of the  Credit  Agreement  is
amended by inserting the following definitions in their appropriate alphabetical
locations:

                  "Excluded  Subsidiary  Material Adverse Change" shall mean the
         occurrence  of a  material  adverse  change  in the  business,  assets,
         property,  condition  (financial  or  otherwise)  or  prospects  of the
         Excluded Subsidiaries, taken as a whole.

                  B.  Defaults.  (a) Section  10.01 of the Credit  Agreement  is
hereby amended by restating paragraph (b) therein as follows:

                  "(b) the  Company or any of its  Subsidiaries  (other than the
         Excluded  Subsidiaries)  shall  default in the payment  when due of any
         principal  of or interest  on any  Indebtedness  having an  outstanding
         principal amount of at least $1,000,000  (other than the Loans); or any
         event or condition shall occur which results in the acceleration of the
         maturity  of  any  such  Indebtedness  of  the  Company  or  any of its
         Subsidiaries  (other than the  Excluded  Subsidiaries)  or enables (or,
         with the giving of notice or lapse of time or both,  would  enable) the
         holder of any such  Indebtedness  or any Person acting on such holder's
         behalf to accelerate the maturity thereof; or"


                                Amendment No. 4
<PAGE>
                                      -2-


                  (b) Section  10.01 of the Credit  Agreement is hereby  further
amended by restating paragraph (k) therein as follows:

                  "(k)  an Excluded Subsidiary Material Adverse Change or any
        Change of Control shall occur; or"

                  C.  General.  References  in the Credit  Agreement  (including
references to the Credit  Agreement as amended hereby) to "this  Agreement" (and
indirect references such as "hereunder",  "hereby", "herein" and "hereof") shall
be deemed to be references to the Credit Agreement as amended hereby.

                  Section 3. Representations and Warranties.  The Company hereby
represents and warrants to the Administrative Agent and the Lenders that:

                  (a) the  representations  and  warranties  made by each of the
         Company and the  Subsidiary  Guarantors in each Basic Document to which
         it is a party (other than the  representations and warranties set forth
         in paragraphs (a) and (b) of Section 8.10 of the Credit  Agreement) are
         correct on and as of the date hereof,  as though made on and as of such
         date (or, if any such representation or warranty is expressly stated to
         have been made as of a specific date, as of such specific date); and

                  (b) no event has occurred and is continuing that constitutes a
         Default or an Event of Default  (and the  parties  agree that breach of
         any of the  representations  and  warranties  in this  Section  3 shall
         constitute  an Event of Default  under  Section  10.01(c) of the Credit
         Agreement).

                  Section  4.  Miscellaneous.  Except  as herein  provided,  the
Credit  Agreement and each of the other Basic Documents  shall remain  unchanged
and in full force and effect.  This  Agreement  may be executed in any number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument  and any of the parties  hereto may execute this Agreement by signing
any such  counterpart.  This  Agreement  shall be governed by, and  construed in
accordance with, the law of the State of New York.


                                Amendment No. 4
<PAGE>
                                      -3-


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective officers thereunto duly authorized,
as of the date first above written.

                                   THE COMPANY

                                   IRON MOUNTAIN INCORPORATED


                                   By  /s/ JP Lawrence
                                     Name: JP Lawrence
                                     Title: Vice President & Treasurer


                                   THE ADMINISTRATIVE AGENT

                                   THE CHASE MANHATTAN BANK


                                   By  /s/ Michael Lancia
                                     Name: Michael Lancia
                                     Title: Vice President


                                   THE LENDERS

                                   THE CHASE MANHATTAN BANK


                                   By  /s/ Michael Lancia
                                     Name: Michael Lancia
                                     Title: Vice President


                                   BANKBOSTON, N.A.


                                   By_______________________
                                     Name:
                                     Title:


                                Amendment No. 4
<PAGE>
                                      -4-



                                   THE BANK OF NEW YORK


                                   By  /s/ William G.C. Dakin
                                     Name: William G.C. Dakin
                                     Title: Vice President


                                   CIBC INC.


                                   By  /s/ Christine Harrigan
                                     Name: Christine Harrigan
                                     Title:  Executive Director


                                   FLEET NATIONAL BANK


                                   By  /s/ Michael A. Palmer
                                     Name: Michael A. Palmer
                                     Title: Vice President


                                   CREDIT LYONNAIS NEW YORK BRANCH


                                   By  /s/ Vladimir Labun
                                     Name: Vladimir Labun
                                     Title: First Vice President--Manager


                                   US TRUST


                                   By  /s/ Daniel G. Eastman
                                     Name: Daniel G. Eastman
                                     Title: Vice President


                                Amendment No. 4
<PAGE>
                                      -5-


                                   UNION BANK OF CALIFORNIA, N.A.


                                   By  /s/ Nancy A. Perkins
                                     Name: Nancy A. Perkins
                                     Title: Vice President


                                   THE BANK OF NOVA SCOTIA


                                   By  /s/ T.M. Pitcher
                                     Name: T.M. Pitcher
                                     Title: Authorized Signatory


                                   HELLER FINANCIAL, INC.


                                   By  /s/ Scott Ziemke
                                     Name: Scott Ziemke
                                     Title: Associate Vice President


                                   NATIONAL CITY BANK


                                   By  /s/ Lisa B. Lisi
                                     Name: Lisa B. Lisi
                                     Title: Vice President


                                   ERSTE BANK DER OESTERREICHISCHEN
                                     SPARKASSEN AG (f/k/a GIROCREDIT BANK
                                     AG DER SPARKASSEN, GRAND CAYMAN
                                     ISLAND BRANCH)


                                   By  /s/ Arcinea Hovanessian
                                     Name: Arcinea Hovanessian
                                     Title: Vice President-Erste Bank NY Branch

                                   By  /s/ John S. Runnion
                                     Name: John S. Runnion
                                     Title: First Vice President


                                Amendment No. 4
<PAGE>
                                      -6-


CONSENTED TO AND AGREED:


IRON MOUNTAIN RECORDS MANAGEMENT, INC.
DSI TECHNOLOGY ESCROW SERVICES, INC.
IRON MOUNTAIN/SAFESITE, INC.
IRON MOUNTAIN CONSULTING SERVICES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO-FP, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO, INC.
CRITERION ATLANTIC PROPERTY, INC.
IM BILLERICA, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF MICHIGAN, INC.
IRON MOUNTAIN SAFE DEPOSIT CORPORATION
IRON MOUNTAIN / NATIONAL UNDERGROUND STORAGE, INC.
IRON MOUNTAIN OF MARYLAND, LLC
ARCUS DATA SECURITY, INC.
HIMSCORP OF PHILADELPHIA, INC.
RECORDKEEPERS, INC.
HIMSCORP OF PITTSBURGH, INC.
HIMSCORP OF CLEVELAND, INC.
HIMSCORP OF NEW ORLEANS, INC.
HIMSCORP OF PORTLAND, INC.
HIMSCORP OF SAN DIEGO, INC.
HIMSCORP OF DETROIT, INC.
HIMSCORP OF LOS ANGELES, INC.
HIMSCORP OF HOUSTON, INC.
IM-AEI ACQUISITION CORPORATION
IRON MOUNTAIN RECORDS MANAGEMENT OF UTAH, INC.
ARCUS STAFFING RESOURCES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF OHIO, INC.
IRON MOUNTAIN GLOBAL, INC.
ARCUS DATA SECURITY LLC

By  /s/ JP Lawrence
  Name: JP Lawrence
  Title: Vice President & Treasurer


                                Amendment No. 4



                                 AMENDMENT NO. 5

                  AMENDMENT NO. 5 (this  "Agreement")  dated as of July 14, 1999
among IRON MOUNTAIN INCORPORATED,  a Delaware corporation (the "Company");  each
of the lenders (the  "Lenders")  listed on the signature  pages hereof;  and THE
CHASE MANHATTAN BANK, as  administrative  agent for the Lenders under the Credit
Agreement referred to below (in such capacity, the "Administrative Agent").

                  The  Company,  the  Lenders and the  Administrative  Agent are
parties to a Second Amended and Restated Credit  Agreement dated as of September
26,  1997 (as from time to time  amended,  the "Credit  Agreement"),  providing,
subject to the terms and  conditions  thereof,  for extensions of credit (by the
making of loans and the  issuing of  letters  of  credit) by the  Lenders to the
Company in an aggregate principal or face amount at any one time outstanding not
exceeding  $250,000,000.  The  Company  has  requested  the Lenders to amend the
Credit  Agreement in certain  respects,  and the Lenders are willing to so amend
the  Credit  Agreement,  all on the  terms  and  conditions  set  forth  herein.
Accordingly, the parties hereto hereby agree as follows:

                  Section 1.  Definitions.  Except as otherwise  defined in this
Agreement,  terms  defined in the Credit  Agreement  are used  herein as defined
therein.

                  Section  2.  Amendments.  Subject  to (i)  the  Administrative
Agent's receipt of counterparts of this Agreement,  duly executed by each of the
Company,  the Majority Lenders and the Administrative Agent and (ii) the written
consent and  agreement  hereto by the  Subsidiary  Guarantors as provided at the
foot hereof, but effective as of the date hereof, the Credit Agreement is hereby
amended as follows:

                  A.  Definitions.  (w) Section 1.01 of the Credit  Agreement is
         hereby amended by inserting the following  definitions (or, in the case
         of any  definition  for a term that is defined in the Credit  Agreement
         before giving effect to this Agreement,  by amending and restating such
         definition to read as set forth below):

                           "Funded    Indebtedness"    shall    mean,    without
                  duplication,  (a)  Indebtedness  (other  than  in  respect  of
                  Synthetic Lease Obligations) that matures or otherwise becomes
                  due more than one year  after  the  incurrence  thereof  or is
                  extendible,  renewable  or  refundable,  at the  option of the
                  obligor,  to a date  more than one year  after the  incurrence
                  thereof   (including  the  current   portion   thereof),   (b)
                  Indebtedness  outstanding  hereunder and (c)  Synthetic  Lease
                  Obligations of IMRM and any Guarantees by the Company thereof.

                           "Interest  Expense" shall mean,  for any period,  the
                  sum (determined  without  duplication) of the aggregate amount
                  of interest accruing during such period on Indebtedness of the
                  Company  and  its  Subsidiaries  (on  a  consolidated  basis),
                  including the interest  portion of rental or similar  payments
                  under Capital Lease  Obligations and Synthetic  Leases and any
                  capitalized  interest,  and  excluding  amortization  of  debt
                  discount and expense and interest paid in kind.

                                 AMENDMENT NO. 5

<PAGE>
                                      -2-

                           "Synthetic  Lease"  shall mean a lease of property or
                  assets designed to permit the lessee (i) to claim depreciation
                  on such  property  or assets  under  U.S.  tax law and (ii) to
                  treat such lease as an  operating  lease or not to reflect the
                  leased property or assets on the lessee's  balance sheet under
                  GAAP.

                           "Synthetic  Lease   Obligations"   shall  mean,  with
                  respect to any Synthetic  Lease,  at any time, an amount equal
                  to the  higher  of (x)  the  aggregate  termination  value  or
                  purchase price or similar  payments in the nature of principal
                  payable  thereunder  and (y) the  then  aggregate  outstanding
                  principal amount of the notes or other instruments  issued by,
                  and the  amount of the  equity  investment,  if any,  in,  the
                  lessor under such Synthetic Lease.

                  (x) The  definition  of "EBITDA" in Section 1.01 of the Credit
         Agreement  is hereby  amended  by  restating  clause  (iii)  thereof as
         follows:

                           "(iii) Interest Expense for such period,"

                  (y) The  definition of  "Indebtedness"  in Section 1.01 of the
         Credit Agreement is hereby amended by restating clause (iii) thereof as
         follows:

                           "(iii) Capital Lease  Obligations and Synthetic Lease
                  Obligations of such Person;"

                  (z) The definition of "Permitted Indebtedness" in Section 1.01
         of the Credit Agreement is hereby amended by substituting "$10,000,000"
         for "$5,000,000" in clause (viii) thereof.

                  B. Financial  Statements and Other Information.  (x) Paragraph
         (b) of  Section  9.01 of the  Credit  Agreement  is hereby  amended  by
         substituting "105" for "90" therein.

                  (y) Section 9.01 of the Credit  Agreement is hereby amended by
         restating paragraph (i) thereof as follows:

                           "(i)  within  60 days  after  the end of each  fiscal
                  quarter of the  Company  (or,  in the case of the last  fiscal
                  quarter in each  fiscal  year,  within  105  days),  a report,
                  certified by the Chief Financial  Officer of the Company,  (x)
                  specifying the Capital Expenditures made by the Company during
                  such  fiscal  quarter  (broken  down to  identify  Maintenance
                  Capital  Expenditures and other Capital  Expenditures) and the
                  Additional Expenditures made by the Company during such fiscal
                  quarter  and  (y)  describing  the  principal   terms  of  the
                  Synthetic Lease  Obligations  entered into by IMRM during such
                  fiscal quarter and any Guarantees by the Company thereof; and"

                  C.  Indebtedness.  Section  9.08 of the  Credit  Agreement  is
hereby amended by restating clause (vi) thereof as follows:


                                 AMENDMENT NO. 5

<PAGE>
                                      -3-


                  "(vi) Synthetic  Lease  Obligations of IMRM and any Guarantees
         by the Company thereof under the Lease Agreement dated as of October 1,
         1998  with Iron  Mountain  Statutory  Trust - 1998 and other  Synthetic
         Lease Obligations with a structure and terms  substantially  similar to
         said  transaction  (provided,  that the  aggregate  amount  of all such
         Synthetic Lease Obligations  permitted under this clause (vi) shall not
         at any time  exceed  $152,500,000  and that such  obligations  shall be
         without recourse to any Subsidiary (other than IMRM) of the Company and
         shall not be Guaranteed by any Subsidiary of the Company)."

                  D. Indebtedness. The Leverage Ratio grid in Section 9.09(a) of
the Credit Agreement is hereby amended to read as follows:

                  Period                                     Leverage Ratio

                  From July 1, 1999
                  through December 31, 2000                   5.75 to 1

                  From January 1, 2001
                  through December 31, 2001                   5.50 to 1

                  From January 1, 2002
                  through June 30, 2002                       5.25 to 1

                  From July 1, 2002
                  and at all times thereafter                 5.00 to 1

                  E. Interest  Coverage Ratio. The Interest  Coverage Ratio grid
in Section 9.10 of the Credit Agreement is hereby amended to read as follows:

                  Period                               Interest Coverage Ratio

                  From January 1, 1999
                  through December 31, 1999                  1.85 to 1

                  From January 1, 2000
                  through December 31, 2001                  2.00 to 1

                  From January 1, 2002
                  and at all times thereafter                2.25 to 1

                  F. Mergers, Asset Dispositions, Etc. Paragraphs (a) and (b) of
Section 9.12 of the Credit Agreement are hereby amended to read as follows:


                                 AMENDMENT NO. 5

<PAGE>
                                      -4-

                  "(a) Maximum  Periodic  Consideration.  Without the consent of
         the Majority Lenders, the aggregate amount of Acquisition Consideration
         (including Stock  Consideration)  paid in respect of Acquisitions shall
         not exceed  $250,000,000  in any year  after  1998;  provided  that the
         aggregate   amount  of  Acquisition   Consideration   excluding   Stock
         Consideration   paid  in  respect  of  Acquisitions  shall  not  exceed
         $175,000,000  in any year after 1998;  provided  further  that the Rain
         Acquisition  shall,  so  long as (i) no  Default  has  occurred  and is
         continuing  at  the  time  of  such   Acquisition  and  (ii)  the  Rain
         Acquisition  complies with the requirements of this Section 9.12 (other
         than clauses (a) and (b) hereof),  (1) be excluded from the limitations
         set forth in this clause (a) and be disregarded in determining  whether
         any  other  Acquisition  in the  year  1999 is in  compliance  with the
         applicable Acquisition  Consideration limits set forth above and (2) be
         deemed  to be a  "Permitted  Acquisition"  for  all  purposes  of  this
         Agreement.

                  (b) Maximum Individual  Consideration.  Without the consent of
         the Majority Lenders,  the Acquisition  Consideration  (including Stock
         Consideration)  paid in respect of any single  Acquisition or series of
         related Acquisitions shall not exceed  $100,000,000,  provided that the
         Rain Acquisition  shall not be subject to the limitation in this clause
         (b)."

                  G. Investments.  Paragraph (vii) of Section 9.14 of the Credit
Agreement  is hereby  amended by  substituting  "$10,000,000"  for  "$5,000,000"
therein.

                  H. Capital Expenditures.  Section 9.19 of the Credit Agreement
is hereby amended by substituting "$100,000,000" for "$50,000,000" therein.

                  I.  General.  References  in the Credit  Agreement  (including
references to the Credit  Agreement as amended hereby) to "this  Agreement" (and
indirect references such as "hereunder",  "hereby", "herein" and "hereof") shall
be deemed to be references to the Credit Agreement as amended hereby.


                  Section 3. Representations and Warranties.  The Company hereby
represents and warrants to the Administrative Agent and the Lenders that:

                  (a) the  representations  and  warranties  made by each of the
         Company and the  Subsidiary  Guarantors in each Basic Document to which
         it is a party (other than the  representations and warranties set forth
         in paragraphs (a) and (b) of Section 8.10 of the Credit  Agreement) are
         correct on and as of the date hereof,  as though made on and as of such
         date (or, if any such representation or warranty is expressly stated to
         have been made as of a specific date, as of such specific date); and

                  (b) no event has occurred and is continuing that constitutes a
         Default or an Event of Default  (and the  parties  agree that breach of
         any of the  representations  and  warranties  in this  Section  3 shall
         constitute  an Event of Default  under  Section  10.01(c) of the Credit
         Agreement).


                                 AMENDMENT NO. 5

<PAGE>
                                      -5-


                  Section  4.  Miscellaneous.  Except  as herein  provided,  the
Credit  Agreement and each of the other Basic Documents  shall remain  unchanged
and in full force and effect.  This  Agreement  may be executed in any number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument  and any of the parties  hereto may execute this Agreement by signing
any such  counterpart.  This  Agreement  shall be governed by, and  construed in
accordance with, the law of the State of New York.


                                 AMENDMENT NO. 5

<PAGE>
                                      -6-



                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective officers thereunto duly authorized,
as of the date first above written.

                                   THE COMPANY

                                   IRON MOUNTAIN INCORPORATED


                                   By /s/J.P. Lawrence
                                     Name:  J.P. Lawrence
                                     Title:  Vice President, Treasurer


                                   THE ADMINISTRATIVE AGENT

                                   THE CHASE MANHATTAN BANK


                                   By /s/Michael Lancia
                                     Name: Michael Lancia
                                     Title: Vice President


                                   THE LENDERS

                                   THE CHASE MANHATTAN BANK


                                   By /s/Michael Lancia
                                     Name: Michael Lancia
                                     Title: Vice President


                                   BANKBOSTON, N.A.


                                   By /s/Patricia Conry
                                     Name: Patricia Conry
                                     Title: Director


                                 AMENDMENT NO. 5

<PAGE>
                                      -7-


                                   THE BANK OF NEW YORK


                                   By /s/William G. C. Dakin
                                     Name: William G. C. Dakin
                                     Title: Vice President


                                   CIBC INC.


                                   By /s/Christine Harrigan
                                     Name: Christine Harriagan
                                     Title: Executive Director


                                   FLEET NATIONAL BANK


                                   By /s/ Michael A. Palmer
                                     Name: Michael A. Palmer
                                     Title: Vice President


                                   CREDIT LYONNAIS NEW YORK BRANCH


                                   By /s/Vladimir Labun
                                     Name: Vladimir Labun
                                     Title: First Vice President-Manager


                                   US TRUST


                                   By /s/ D. G. Eastman
                                     Name: Eastman, D. G.
                                     Title: Vice President



                                 AMENDMENT NO. 5

<PAGE>
                                      -8-


                                   UNION BANK OF CALIFORNIA, N.A.


                                   By /s/Nancy A. Perkins
                                     Name: Nancy A. Perkins
                                     Title: Vice President


                                   THE BANK OF NOVA SCOTIA


                                   By /s/T. M. Pitcher
                                     Name: T. M. Pitcher
                                     Title: Authorized Signatory


                                   HELLER FINANCIAL, INC.


                                   By /s/Scott Ziemke
                                     Name: Scott Ziemke
                                     Title: Assistant Vice President


                                   NATIONAL CITY BANK


                                   By /s/Lisa B. Lisi
                                     Name: Lisa B. Lisi
                                     Title: Vice President


                                   ERSTE BANK DER OESTERREICHISCHEN
                                     SPARKASSEN AG (f/k/a GIROCREDIT BANK
                                     AG DER SPARKASSEN, GRAND CAYMAN
                                     ISLAND BRANCH)


                                   By /s/Arcinee Hovanessian
                                     Name: Arcinee Hovanessian
                                     Title: Vice President

                                   By /s/John S. Runnion
                                     Name: John S. Runnion
                                     Title: First Vice President

                                 AMENDMENT NO. 5

<PAGE>
                                      -9-



CONSENTED TO AND AGREED:


IRON MOUNTAIN RECORDS MANAGEMENT, INC.
DSI TECHNOLOGY ESCROW SERVICES, INC.
IRON MOUNTAIN/SAFESITE, INC.
IRON MOUNTAIN CONSULTING SERVICES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO-FP, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF SAN ANTONIO, INC.
CRITERION ATLANTIC PROPERTY, INC.
IM BILLERICA, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF MICHIGAN, INC.
IRON MOUNTAIN SAFE DEPOSIT CORPORATION
IRON MOUNTAIN / NATIONAL UNDERGROUND STORAGE, INC.
IRON MOUNTAIN OF MARYLAND, LLC
ARCUS DATA SECURITY, INC.
HIMSCORP OF PHILADELPHIA, INC.
RECORDKEEPERS, INC.
HIMSCORP OF PITTSBURGH, INC.
HIMSCORP OF CLEVELAND, INC.
HIMSCORP OF NEW ORLEANS, INC.
HIMSCORP OF PORTLAND, INC.
HIMSCORP OF SAN DIEGO, INC.
HIMSCORP OF DETROIT, INC.
HIMSCORP OF LOS ANGELES, INC.
HIMSCORP OF HOUSTON, INC.
IM-AEI ACQUISITION CORPORATION
IRON MOUNTAIN RECORDS MANAGEMENT OF UTAH, INC.
ARCUS STAFFING RESOURCES, INC.
IRON MOUNTAIN RECORDS MANAGEMENT OF OHIO, INC.
IRON MOUNTAIN GLOBAL, INC.
ARCUS DATA SECURITY LLC

By /s/ J. P. Lawrence
  Name: J. P. Lawrence
  Title:  Vice President, Treasurer




FOR IMMEDIATE RELEASE

Contact:  John F. Kenny, Jr.
          Executive Vice President and
          Chief Financial Officer
          (617) 535-IRON (4766)


       Iron Mountain Revenues Increase 41 Percent for Second Quarter 1999

     EBITDA Increases to $33 Million, up 42 percent from Second Quarter 1998



Boston,  MA - July 29,  1999 -- Iron  Mountain  Incorporated  (NYSE:  IRM),  the
world's largest records management company,  reported higher revenues and EBITDA
for the quarter ended June 30, 1999 compared with the same period in 1998.

Iron  Mountain's  total  revenues from  continuing  operations,  which  excludes
revenues from its IT staffing  business,  for the second quarter of 1999 grew to
$132 million,  an increase of 41 percent  compared with the same period in 1998.
The revenue  growth is comprised  of growth  through  acquisitions  and internal
growth.  Internal  revenue growth for the second quarter of 1999 was 13 percent.
Iron Mountain's  earnings before interest,  taxes,  depreciation,  amortization,
extraordinary  items and other  income  ("EBITDA")  from  continuing  operations
increased 42 percent to $33 million for the second quarter of 1999 compared with
the same period in 1998.

Storage  revenues  increased to $80 million for the second  quarter of 1999 from
$56 million for the same period in 1998. This marks the 42nd consecutive quarter
for which  Iron  Mountain  has  reported  increased  storage  revenues.  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.

As  previously  announced,  in order to focus  on its  records  and  information
management services business,  Iron Mountain has decided to sell its information
technology staffing business, Arcus Staffing Resources,  Inc. Arcus Staffing was
acquired in January 1998 as part of the  acquisition  of Arcus  Group,  Inc. The
Company expects to complete the transaction before the end of the year.

The sale of Arcus Staffing is being  accounted for as a discontinued  operation.
Accordingly,  the  Arcus  Staffing  operations  have been  segregated  from Iron
Mountain's continuing operations and reported as a

                                   -- more --

<PAGE>

Iron Mountain Revenues Increase for Second Quarter / Page 2

separate line item on the Company's  statements  of  operations.  In the quarter
ended June 30, 1999, the Company recorded an estimated loss on the sale of Arcus
Staffing of $9.4 million  comprised  primarily of the write-off of nondeductible
goodwill and a deferred tax provision. In addition, the Company reclassified its
1998 and  first-quarter  1999  financial  statements  to present  the  operating
results of Arcus Staffing as a discontinued operation.

For the  first  half  of  1999,  Iron  Mountain  reported  total  revenues  from
continuing operations of $241 million, an increase of 32 percent compared to the
first half of 1998. EBITDA from continuing  operations for the Company increased
33 percent, to $60 million.

British Data Management ("BDM"),  the Company's 50.1 percent owned subsidiary in
the United  Kingdom,  contributed  $8.7  million in revenues and $2.2 million in
EBITDA to the Company's second quarter consolidated results and $11.6 million in
revenues and $3.1 million in EBITDA to the  Company's  consolidated  results for
the first half of 1999. The Company's consolidated results for the first half of
1999  include only four months of BDM's  operations  due to the  differences  in
fiscal year-ends for the two companies.

As part of its growth strategy,  Iron Mountain has completed seven  acquisitions
since the first quarter of 1999 for total  consideration of  approximately  $163
million.  In April 1999, the Company acquired First American Records Management,
Inc. (seven markets) and Data Base, Inc. (12 markets).  In May 1999, the Company
acquired  Data Vault (CA) and File  Management,  Inc.  (AL).  In June 1999,  the
Company  acquired Carter Media  Management,  Inc. (KY), a Jacksonville,  Florida
records  management  business  (FL) and Central  Files,  Inc. of Puerto Rico. In
addition,  BDM acquired  Memogarde S.A. and related  companies for approximately
$17 million. Memogarde,  headquartered in Paris, France, is the largest provider
of data security services in France.

In  April,  Iron  Mountain  completed  the  sale of $150  million  in  aggregate
principal amount of 8-1/4% Senior  Subordinated  Notes due 2011. Net proceeds to
the Company after  underwriters'  discounts and commissions  were  approximately
$145  million.  In May,  Iron Mountain  successfully  completed an  underwritten
public  offering of 5.8 million shares of its common stock.  Net proceeds to the
Company  were   approximately   $154  million.   The  net  proceeds  from  these
transactions  were used to repurchase all of the shares of the Company's  common
stock  issued  in the  Data  Base  acquisition,  to repay  debt and for  general
corporate purposes, including future acquisitions.

Richard Reese, the Company's Chairman and Chief Executive Officer, stated: "This
has been a very strong and eventful quarter for Iron Mountain.  The business, as
expected,   posted  another  quarter  of  solid  results.   We  completed  eight
acquisitions in several new markets including France and Puerto Rico bringing to
12 the  number  of  acquisitions  closed  to  date  in  1999.  In  addition,  we
strengthened our balance sheet by raising nearly $300 million in successful debt
and equity financing transactions."

Iron  Mountain   currently  operates  more  than  300  records  and  information
management  services  centers  in 69  markets  in  the  United  States  and  six
internationally.   The  Company  serves  more  than  70,000  customer  accounts,
including more than half of the Fortune 500 Companies.  Iron Mountain provides a
full  array of  records  and  information  management  services  including:  (i)
off-site  storage,  management  and related  consulting  services for  business,
healthcare and vital records;  (ii) data security  services  including  off-site
storage and rotation of electronic records; and (iii) sales of related products.
                                   -- more --

<PAGE>

Iron Mountain Revenues Increase for Second Quarter / Page 3

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.  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) the inability to
complete  the sale of Arcus  Staffing  on  satisfactory  terms or on the desired
timetable, and (ii) other trends in competitive or economic conditions affecting
the  Company'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   Statements  of   Operations   and  Condensed
         Consolidated Balance Sheets follow.


<PAGE>

Iron Mountain Revenues Increase for Second Quarter / Page 4

<TABLE>
<CAPTION>
                                            IRON MOUNTAIN INCORPORATED
                                  CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Amounts in Thousands except Per Share Data)
                                                    (Unaudited)

                                                                  Three Months Ended                  Six Months Ended
                                                                       June 30,                           June 30,
                                                             ------------------------------     ------------------------------
                                                                  1999           1998               1999            1998
                                                             --------------- --------------     -------------- ---------------
<S>                                                               <C>             <C>               <C>             <C>
REVENUES:
   Storage                                                         $ 79,928       $ 55,592          $ 147,650       $ 108,540
   Service and Storage Material Sales                                51,837         37,872             93,486          73,980
                                                             --------------  -------------      -------------  --------------

      Total Revenues                                                131,765         93,464            241,136         182,520

OPERATING EXPENSES:
   Cost of Sales (Excluding Depreciation)                            66,167         46,756            120,602          91,673
   Selling, General and Administrative                               32,938         23,638             60,813          45,998
   Depreciation                                                       8,996          6,703             16,706          12,943
   Amortization                                                       7,285          5,200             13,170          10,018
                                                             --------------  -------------      -------------  --------------

      Total Operating Expenses                                      115,386         82,297            211,291         160,632
                                                             --------------  -------------      -------------  --------------

OPERATING INCOME                                                     16,379         11,167             29,845          21,888

INTEREST EXPENSE                                                     14,227         10,875             26,171          23,187

OTHER INCOME                                                             --          1,700                 --           1,700
                                                             --------------  -------------      -------------  --------------

      Income from Continuing Operations Before Provision
         for Income Taxes and Minority Interest                       2,152          1,992              3,674             401

PROVISION FOR INCOME TAXES                                            3,229          2,387              4,852           1,342

MINORITY INTEREST                                                       318             --                465              --
                                                             --------------  -------------      -------------  --------------

      Loss from Continuing Operations                                (1,395)          (395)            (1,643)           (941)

INCOME FROM DISCONTINUED OPERATIONS (NET OF APPLICABLE
      TAXES)                                                            142            134                241             366

LOSS ON SALE OF DISCONTINUED OPERATIONS (1)                           9,400             --              9,400              --
                                                             --------------  -------------      -------------  --------------

      Net Loss                                                    $ (10,653)        $ (261)         $ (10,802)         $ (575)
                                                             ==============  =============      =============  ==============

LOSS FROM CONTINUING OPERATIONS PER COMMON SHARE - BASIC
      AND DILUTED                                                   $ (0.04)       $ (0.01)           $ (0.05)        $ (0.04)
                                                             ==============  =============      =============  ==============

NET LOSS PER COMMON SHARE - BASIC AND DILUTED                       $ (0.32)    $    (0.01)           $ (0.35)        $ (0.02)
                                                             ==============  =============      =============  ==============

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING                           33,028         28,989             31,274          25,648
                                                             ==============  =============      =============  ==============

EBITDA FROM CONTINUING OPERATIONS                                  $ 32,660       $ 23,070           $ 59,721        $ 44,849
                                                             ==============  =============      =============  ==============
<FN>
- --------------
(1) Represents the estimated loss on the sale of Arcus Staffing comprised primarily of the write-off of nondeductible goodwill and a
deferred tax provision.
</FN>
</TABLE>



                                   -- more --


<PAGE>



Iron Mountain Revenues Increase for Second Quarter / Page 5

<TABLE>
<CAPTION>
                                            IRON MOUNTAIN INCORPORATED
                                       CONDENSED CONSOLIDATED BALANCE SHEETS
                                              (Amounts in Thousands)
                                                    (Unaudited)



                                                                                       June 30,              December 31,
                                                                                         1999                    1998
                                                                                  --------------------    -------------------
<S>                                                                                    <C>                       <C>
ASSETS

CURRENT ASSETS:
   Cash and Cash Equivalents                                                             $  26,569                $  1,715
   Accounts Receivable (less allowances of $4,220
       and $3,316, respectively)                                                           100,010                  75,565
   Other Current Assets                                                                     20,426                  66,657
                                                                                  ----------------        ----------------
         Total Current Assets                                                              147,005                 143,937
                                                                                  ----------------        ----------------

PROPERTY, PLANT AND EQUIPMENT:
   Property, Plant and Equipment at Cost                                                   445,005                 354,101
   Less: Accumulated Depreciation                                                          (90,911)                (87,358)
                                                                                  ----------------        ----------------
         Property, Plant and Equipment, net                                                354,094                 266,743
                                                                                  ----------------        ----------------

OTHER ASSETS:
   Goodwill, net                                                                           718,125                 527,235
   Other Non-current Assets, net                                                            41,228                  29,470
                                                                                  ----------------        ----------------
         Total Other Assets                                                                759,353                 556,705
                                                                                  ----------------        ----------------

         Total Assets                                                                  $ 1,260,452               $ 967,385
                                                                                  ================        ================

LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
   Current Portion of Long-term Debt                                                     $   4,216                $  1,731

   Other Current Liabilities                                                               110,268                 141,741
                                                                                  ----------------        ----------------
         Total Current Liabilities                                                         114,484                 143,472

LONG-TERM DEBT, NET OF CURRENT PORTION                                                     581,574                 454,447
OTHER LONG-TERM LIABILITIES                                                                 37,497                  30,584

MINORITY INTEREST                                                                           39,788                      --

STOCKHOLDERS' EQUITY                                                                       487,109                 338,882
                                                                                  ----------------        ----------------

         Total Liabilities and Stockholders' Equity                                    $ 1,260,452               $ 967,385
                                                                                  ================        ================
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