8-K

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                                  UNITED STATES
                       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 (DATE OF EARLIEST EVENT REPORTED): OCTOBER 5, 2006

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

                                    DELAWARE
                 (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)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2.):

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange
     Act (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (7 CFR 240.13e-4(c))

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ITEM 8.01.  OTHER EVENTS.

On October 5, 2006, the Company issued a press release setting forth the
Company's financial guidance for the quarter ending September 30, 2006 and the
full year ending December 31, 2006. A copy of the Company's press release is
attached hereto as Exhibit 99.1 and is incorporated herein by reference.

ITEM 9.01.  FINANCIAL STATEMENTS AND EXHIBITS.

(d)      Exhibits

99.1     Press Release of Iron Mountain Incorporated dated October 5, 2006.



                                   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 thereunto duly authorized.

                                                  IRON MOUNTAIN INCORPORATED
                                                  (Registrant)


                                                  By:    /s/ John F. Kenny, Jr.
                                                         -----------------------
                                                  Name:  John F. Kenny, Jr.
                                                  Title: EVP and Chief Financial
                                                         Officer

Date: October 5, 2006

EX-99.1

                                                                    Exhibit 99.1

IRON MOUNTAIN INCORPORATED HOSTS 9TH ANNUAL INVESTOR DAY IN NEW YORK CITY

                   COMPANY UPDATES 2006 FINANCIAL GUIDANCE

    BOSTON, Oct. 5 /PRNewswire-FirstCall/ -- Iron Mountain Incorporated (NYSE:
IRM), the global leader in information protection and storage services, today
updated guidance for its 2006 financial performance at the Company's 9th Annual
Investor Day in New York, which is expected to draw record attendance. This
annual gathering of Company management, investors and Wall Street analysts
features management presentations covering a variety of important topics related
to the Company's strategy, execution and financial performance.

    For the full year ending December 31, 2006, the Company expects the
following:

    -- Total revenues in the range of $2,300 million to $2,350 million;
    -- Operating income between $392 million and $403 million;
    -- Depreciation and amortization between $208 million and $212 million;
    -- Capital expenditures of $360 million to $395 million; and
    -- Total revenue internal growth rate between 8% and 9%.

    The above guidance anticipates $40 million to $55 million of known
opportunity driven real estate capital expenditures and excludes all revenues,
expenses or capital expenditures associated with possible future acquisitions.

    For the third quarter ending September 30, 2006, expects the following:

    -- Total revenues in the range of $585 million to $597 million;
    -- Operating income between $92 million and $97 million; and
    -- Depreciation and amortization to be approximately $53 million.

    In order to further enhance the overall quality of its investor
communications, the Company will make an audiocast of its Investor Day
presentation available on its website (http://www.ironmountain.com). Please
check the website for details regarding the timing of the posting of the
audiocast. The slides that will be presented at the conference will also be
posted to the website and available for viewing after 8:00 A.M. on Thursday,
October 5, 2006.

    About Iron Mountain

    Iron Mountain Incorporated (NYSE: IRM) helps organizations around the world
reduce the costs and risks associated with information protection and storage.
The Company offers comprehensive records management and data protection
solutions, along with the expertise and experience to address complex
information challenges such as rising storage costs, litigation, regulatory
compliance and disaster recovery. Founded in 1951, Iron Mountain is a trusted
partner to more than 90,000 corporate clients throughout North America, Europe,
Latin America and Asia Pacific. For more information, visit the Company's Web
site at http://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 federal
securities laws, and is subject to the safe-harbor created by such Act.
Forward-looking statements include our third quarter and full year 2006
financial performance outlook and statements regarding our goals, beliefs,
future growth 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) in the various digital businesses in which the
Company is engaged, 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; (iv) the cost
to comply with current and future legislation or regulation relating to privacy
issues; (v) the impact of litigation that may arise in connection with incidents
of inadvertent disclosures of customers' confidential information; (vi) the
Company's ability or inability to complete acquisitions on satisfactory terms
and to integrate acquired companies efficiently; (vii) the cost and availability
of financing for contemplated growth; (viii) business partners upon whom the
Company depends for technical assistance or management and acquisition expertise
outside the United States will not perform as anticipated; (ix) changes in the
political and economic environments in the countries in which the Company's
international subsidiaries operate; and (x) 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.

     Investor Relations Contact:
     Stephen P. Golden
     Director, Investor Relations
     sgolden@ironmountain.com
     (617) 535-4799

SOURCE  Iron Mountain Incorporated
    -0-                             10/05/2006
    /CONTACT:  Stephen P. Golden, Director, Investor Relations of Iron
Mountain, +1-617-535-4799, sgolden@ironmountain.com/
    /Web site:  http://www.ironmountain.com /
    (IRM)