WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 OF 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): December 23, 2002

                           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)


       On December 23, 2002, J. Peter Pierce, a member of the Board of Directors
of Iron Mountain Incorporated (the "Company") tendered his resignation as a
director effective immediately. A copy of Mr. Pierce's letter of resignation is
attached as Exhibit 17.1. By letter to Mr. Pierce dated December 20, 2002, the
Company's directors had requested that Mr. Pierce resign as a director (the
"Board's Letter"). A copy of the Board's Letter is attached hereto as Exhibit

       Mr. Pierce stated in his resignation letter that he was not resigning as
a result of the Board's Letter. Instead, Mr. Pierce stated that his resignation
was prompted by his disagreement as to certain procedures followed by the
Company, and the Board, in respect of the Company's disputes with Mr. Pierce,
which include pending litigation and arbitration proceedings against him related
to Mr. Pierce's alleged involvement with and support of Sequedex LLC
("Sequedex"), which has been previously disclosed by the Company. Mr. Pierce
contends that the actions taken against him were not authorized by the Board of
Directors and that the Company did not adequately disclose its actions with
regard to Mr. Pierce. Mr. Pierce also states that his resignation from the Board
will enable him to pursue shareholders' rights with other interested
shareholders to ensure that Iron Mountain is governed and managed properly.
Finally, Mr. Pierce objected to the Company's involvement with Mr. Carr, a
business associate of Mr. Pierce, and of the failure of the Company to disclose
a lawsuit between Mr. Carr and Mr. Pierce.

       The Company does not agree with Mr. Pierce's position and certain of his
factual statements. When the Company's management began receiving information in
the autumn of 2000 that Sequedex had been established by certain former
executives of Pierce Leahy Corp. (some of which had noncompetition agreements
with the Company), and also that Mr. Pierce was directly involved with Sequedex,
management directed the Company's outside counsel to conduct a confidential,
discreet investigation of these matters under the direction of Mr. Reese and the
members of the Company's Executive Committee other than Mr. Pierce. As a result
of counsel's confidential investigation (which included certain information from
Mr. Carr, referred to in Mr. Pierce's resignation letter) and discovery in
lawsuits against certain former employees of the Company and Sequedex, the
Company's management and members of its Board of Directors other than Mr. Pierce
concluded that Mr. Pierce had breached noncompetition and nonsolicitation
agreements with, as well as his fiduciary obligations to, the Company, both
directly and indirectly, by reason of his involvement with and support of
Sequedex. In order to preserve the confidential character of the investigation,
as well as to prevent the potential destruction of evidence and the premature or
inaccurate disclosures of these matters, the Company's management and the
members of its Board of Directors met informally on several occasions. The
Company believes that its procedures were appropriate, given the unusual
circumstances in the situation. As a result of the information that came to the
attention of the Company's management and Board, the Company, on March 28, 2002,
initiated a civil action against Mr. Pierce and others in the Superior Court of
New Jersey, Middlesex County, Chancery Division, and subsequently, on April 15,
2002, initiated an arbitration proceeding against Mr. Pierce, as previously
dislcosed by the Company. The Company's efforts to resolve its disputes with Mr.
Pierce, Sequedex and the other defendants were rejected.

       The Company disagrees with Mr. Pierce's characterization of its dealings
with Mr. Carr, who first approached the Company's management in the autumn of
2001 with information that, among other things, Mr. Pierce, who had acquired a
controlling interest in Mr. Carr's transportation, warehousing and logistics
company earlier that year, was utilizing that company surreptitiously to provide
employee support, transportation services and advertising for Sequedex. The
information provided by Mr. Carr was consistent with other information that had
come to management's attention as a result of the investigation and discovery
described above. On April 9, 2002, after the Company was notified that Mr. Carr
had commenced an independent lawsuit against Mr. Pierce, management concluded
that it was in the best interests of the Company and its stockholders to provide
$50,000 in financial support to Mr. Carr's counsel in order to ensure that the
facts relating to certain of Mr. Pierce's actions in derogation of his
contractual and fiduciary obligations to the Company were fully developed.


(c)  Exhibits.

Exhibit No.       Item

17.1        Letter, dated December 23, 2002, from J. Peter Pierce to C. Richard
            Reese and the Board of Directors.

99.1        Letter, dated December 20, 2002, from the Board of Directors to J.
            Peter Pierce.


       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/ GARRY B. WATZKE
                                            Name:  Garry B. Watzke
                                            Title: Vice President and Secretary

Date: December 26, 2002