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 (Date of earliest event reported): October 29, 2003

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

                 (State or other jurisdiction of incorporation)

               1-13045                              23-2588479
      (Commission File Number)           (IRS Employer Identification No.)

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

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

Item 12.  Results of Operations and Financial Condition.

On October  29,  2003,  the Company  issued a press  release  setting  forth the
Company's  results of operations  and  financial  condition for its third fiscal
quarter  ended  September  30, 2003. A copy of the  Company's  press  release is
attached hereto as Exhibit 99.1 and is incorporated herein by reference.


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

                                  IRON MOUNTAIN INCORPORATED

                                  By:    /s/ Jean A. Bua

                                  Name:  Jean A. Bua
                                  Title: Vice President and Corporate Controller

Date: October 29, 2003