S8

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM S-8

REGISTRATION STATEMENT UNDER THE
SECURITIES ACT OF 1933

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

  Pennsylvania
(State or Other Jurisdiction of Incorporation or Organization)
23-2588479
(I.R.S. Employer Identification No.)

745 Atlantic Avenue, Boston, Massachusetts 02111
(Address of Principal Executive Offices including zip code)

Iron Mountain Incorporated 2002 Stock Incentive Plan
(Full Title of the Plan)

C. Richard Reese
Chairman of The Board of
Directors and Chief Executive Officer
Iron Mountain Incorporated
745 Atlantic Avenue
Boston, Massachusetts 02111
(617) 535-4766
COPY TO:
William J. Curry, Esq.
Sullivan & Worcester LLP
One Post Office Square
Boston, Massachusetts 02109
(617) 338-2800
(Name, Address and Telephone Number of Agent For Service)

        If, as a result of stock splits, stock dividends or similar transactions, the number of securities purported to be registered on this registration statement changes, the provisions of Rule 416 under the Securities Act of 1933, as amended, shall apply to this registration statement.

        The prospectus meeting the requirements of Section 10(a) of the Securities Act of 1933, as amended, which is being provided to participants in the Iron Mountain Incorporated 2002 Stock Incentive Plan in conjunction with this registration statement also relates to the shares registered under the Registration Statement on Form S-8 dated May 24, 2002 (File No. 333-89008) of Iron Mountain Incorporated.

CALCULATION OF REGISTRATION FEE

Title of Each Class of
Securities to be Registered

Amount to be
Registered

Proposed Maximum
Offering Price Per
Share(1)

Proposed Maximum
Aggregate Offering
Price(1)

Amount of
Registration Fee

Common Stock, $0.01 par value per share 2,000,000  $30.97 $61,940,000 $7,847.80

(1)    The proposed maximum offering price per share and the proposed maximum aggregate offering price have been estimated solely for the purpose of calculating the amount of the registration fee in accordance with Rules 457(c) and 457(h) under the Securities Act of 1933 on the basis of the average of the high and low prices of the Common Stock on the New York Stock Exchange on August 13, 2004.


Registration of Additional Securities – Explanatory Note

        We are filing this registration statement to register an additional 2,000,000 shares of our common stock for issuance under the Iron Mountain Incorporated 2002 Stock Incentive Plan (the “Plan”). The increase in the number of shares authorized for issuance under the Plan was approved by our stockholders at our 2004 annual meeting held on May 27, 2004. On May 24, 2002 we filed a registration statement on Form S-8 (Reg. No. 333-89008) covering 1,352,543 shares of our common stock authorized for issuance under the original version of the Plan (the “Prior Registration Statement”) with the Securities and Exchange Commission (the “Commission”).  Pursuant to General Instruction E to Form S-8, the contents of the Prior Registration Statement are incorporated herein by reference, except for Item 3 and Item 8 of the Prior Registration Statement, which is being updated by this registration statement.  

PART II — INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference.

        The following additional documents, which have been filed by the Company with the Commission, are incorporated by reference in and made a part of this registration statement, as of their respective dates:

  (a)   The Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003 filed on March 11, 2004;

  (b)   The Company’s Quarterly Reports on Form 10-Q for the fiscal quarter ended March 31, 2004 and for the fiscal quarter ended June 30, 2004 filed on May 10, 2004 and August 9, 2004, respectively;

  (c)   The Company’s Current Reports on Form 8-K filed January 7, 2004, January 16, 2004 and May 27, 2004; and

  (d)   The description of the Company’s common stock contained in the registration statement on Form 8-A dated May 27, 1997 (File No. 1-13045), including all amendments or reports filed for the purpose of updating such description.

        All documents subsequently filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to the filing of a post-effective amendment which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in this registration statement and to be part hereof from the date of filing of such documents.

        Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this registration statement to the extent that a statement herein, or in any subsequently filed document which also is or is deemed to be incorporated by reference, modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this registration statement.

Item 8.  Exhibits.

EXHIBIT INDEX

EXHIBIT NO.          DESCRIPTION

  5.1   Opinion of Sullivan & Worcester LLP.*


  5.2   Opinion of Ballard Spahr Andrews & Ingersoll, LLP.*

  23.1   Consent of Sullivan & Worcester LLP (contained in the opinion of Sullivan &Worcester LLP filed herewith as Exhibit 5.1).

  23.2   Consent of Ballard Spahr Andrews & Ingersoll, LLP (contained in the opinion of Ballard Spahr Andrews & Ingersoll, LLP filed herewith as Exhibit 5.2).

  23.3   Consent of Independent Registered Public Accounting Firm - Deloitte & Touche LLP (Iron Mountain Incorporated).*

  23.4   Consent of RSM Robson Rhodes LLP (Iron Mountain Europe Limited).*

  24   Powers of Attorney (included in the signature page to this registration statement).

_________________

*   filed herewith


SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, Commonwealth of Massachusetts, on the 18th day of August, 2004.

  IRON MOUNTAIN INCORPORATED


By:  /s/  C. Richard Reese
        Name: C. Richard Reese
        Title: Chairman of the Board,
                  Chief Executive Officer and President

        Pursuant to the requirements of the Securities Act of 1933, this registration statement on Form S-8 has been signed below by the following persons in the capacities and on the dates indicated. The undersigned officers and directors of the Company hereby severally constitute and appoint C. Richard Reese and John F. Kenny, Jr., and each of them acting singly, our true and lawful attorneys to sign for us and in our names in the capacities indicated below any and all amendments or supplements, whether pre-effective or post-effective, to this registration statement on Form S-8 and to file the same, with exhibits thereto and other documents in connection therewith, with the Commission, granting unto each of said attorneys, acting singly, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming our signatures to said amendments to this registration statement signed by our said attorneys and all else that said attorneys may lawfully do and cause to be done by virtue hereof.

Signature Title Date

/s/  C. Richard Reese
C. Richard Reese

Chairman of the Board, Chief
Executive Officer and President

August 18, 2004

/s/  John F. Kenny, Jr.
John F. Kenny, Jr.

Executive Vice President, Chief
Financial Officer and Director

August 18, 2004

/s/  Clarke H. Bailey
Clarke H. Bailey

Director

August 18, 2004

/s/  Constantin R. Boden
Constantin R. Boden

Director

August 18, 2004

/s/  Kent P. Dauten
Kent P. Dauten

Director

August 18, 2004

/s/  B. Thomas Golisano
B. Thomas Golisano

Director

August 18, 2004





/s/  Arthur D. Little
Arthur D. Little

Director

August 18, 2004

/s/  Vincent J. Ryan
Vincent J. Ryan

Director

August 18, 2004

/s/  Jean A. Bua
Jean A. Bua

Vice President and Corporate
Controller (Chief Accounting
Officer)

August 18, 2004