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    <div style="TEXT-ALIGN: center"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">As filed with the Securities and
Exchange Commission on November 12, 2008</font></div>
    <div style="TEXT-ALIGN: right"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Registration No.
333-</font><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">UNITED
STATES</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">SECURITIES
AND EXCHANGE COMMISSION</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 11pt; FONT-FAMILY: Verdana">WASHINGTON,
D.C. 20549</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Verdana">FORM
S-8</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana"><font style="DISPLAY: inline; FONT-WEIGHT: bold">REGISTRATION STATEMENT</font> <font style="DISPLAY: inline; FONT-WEIGHT: bold">UNDER THE</font></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">SECURITIES
ACT OF 1933</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">IRON
MOUNTAIN INCORPORATED</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(Exact Name of
Registrant as Specified in Its Charter)</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td valign="top" width="40%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Delaware</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">(State or
      Other Jurisdiction of</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Incorporation
      or Organization)</font></div>
            </td>
            <td valign="top" width="40%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: verdana">23-2588479</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">(I.R.S.
      Employer</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Identification
      No.)</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">745
Atlantic Avenue, Boston, Massachusetts 02111</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(Address of
Principal Executive Offices including zip code)</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Iron
Mountain Incorporated 2002 Stock Incentive Plan</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(Full Title of
the Plan)</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Robert T.
Brennan</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">President and
Chief Executive Officer</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Iron Mountain
Incorporated</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">745 Atlantic
Avenue</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Boston,
Massachusetts 02111</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(617)
535-4766</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">&#160;(Name,
Address and Telephone Number of Agent For Service)</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">COPY
TO:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">William J. Curry,
Esq.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Sullivan &amp;
Worcester LLP</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">One Post Office
Square</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Boston,
Massachusetts 02109</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(617)
338-2800</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">_____________________________</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Indicate by check
mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer or a small reporting company. See the definitions of
"large accelerated filer," "accelerated filer" and "smaller reporting company"
in Rule&#160;12b-2 of the Exchange Act. (Check one):<a name="FIS_UNIDENTIFIED_TABLE_3" /></font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">
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            <td align="left" valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Large
      accelerated filer&#160; <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: wingdings">&#253;</font></font></div>
            </td>
            <td align="left" valign="top" width="11%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: verdana">&#160;
      </font></td>
            <td align="left" valign="top" width="35%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Accelerated
      filer&#160; <font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Non-accelerated
      filer&#160; <font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></font></div>
            </td>
            <td align="left" valign="top" width="11%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: verdana">&#160;
      </font></td>
            <td align="left" valign="top" width="35%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Smaller
      reporting company&#160; <font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></font></div>
            </td>
          </tr>
          <tr>
            <td align="left" colspan="3" valign="top" width="77%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 2.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">(Do not
      check if a smaller reporting
company)</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;</div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
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        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
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        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
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      </div>
    </div><br>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">CALCULATION
OF REGISTRATION FEE</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td valign="top" width="21%" style="BORDER-TOP: black 1.5pt double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Title
      of Each Class of Securities to </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">be
      Registered</font></div>
            </td>
            <td valign="top" width="13%" style="BORDER-TOP: black 1.5pt double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Amount
      to be </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Registered(1)</font></div>
            </td>
            <td valign="top" width="14%" style="BORDER-TOP: black 1.5pt double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Proposed
      Maximum </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Offering
      Price Per Share(2)</font></div>
            </td>
            <td valign="top" width="15%" style="BORDER-TOP: black 1.5pt double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Proposed
      Maximum Aggregate Offering Price(2)</font></div>
            </td>
            <td valign="top" width="16%" style="BORDER-TOP: black 1.5pt double">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Amount
      of Registration </font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Fee</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="21%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: verdana">Common
      Stock, $0.01 par value per share</font></div>
            </td>
            <td valign="top" width="13%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: verdana">7,500,000</font></div>
            </td>
            <td valign="top" width="14%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: verdana">$22.805</font></div>
            </td>
            <td valign="top" width="15%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: verdana">$171,037,500</font></div>
            </td>
            <td valign="top" width="16%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: verdana">$6,721.78</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Verdana">(1)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;In
accordance with Rule&#160;416 under the Securities Act of 1933, this
registration statement shall be deemed to cover any additional securities that
may from time to time be offered or issued to prevent dilution resulting from
stock splits, stock dividends or similar transactions.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Verdana">(2)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;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 November 11,
2008.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>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 (the
&#8220;Plan&#8221;) 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), as amended by Post-Effective Amendment No. 1 to Form
S-8 dated June 3, 2005; the Registration Statement on Form S-8 dated August 18,
2004 (File No. 333-118322), as amended by Post-Effective Amendment No. 1 to Form
S-8 dated June 3, 2005; the Registration Statement on Form S-8 dated November
12, 2004 (File No. 333-120395), as amended by Post-Effective Amendment No. 1 to
Form S-8 dated June 3, 2005; and the Registration Statement on Form S-8 dated
November 15, 2006 (File No. 333-138716) of Iron Mountain Incorporated
(collectively, the &#8220;Prior Registration Statement&#8221;).</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Registration
of Additional Securities &#8211; Explanatory Note</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>We are filing this registration statement to
register an additional 7,500,000 shares of our common stock for issuance under
the Plan. The increase in the number of shares authorized for issuance under the
Plan was approved by our stockholders at our 2008 annual meeting held on June 5,
2008.&#160;&#160;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, Item 8 and Item 9 of Part II of the Prior Registration Statement,
which are being updated by this registration statement.</font></div><br>
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        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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      </div>
    </div><br>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">PART
II&#160;&#160;INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Item
3. Incorporation of Documents by Reference.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">The following
additional documents, which have been filed by us with the Securities and
Exchange Commission (the &#8220;Commission&#8221;), are incorporated by reference in and
made a part of this registration statement, as of their respective
dates:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(a)&#160;&#160;Our
Annual Report on Form 10-K for the fiscal year ended December 31, 2007, filed on
February 29, 2008;</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(b)&#160;&#160;Our
Quarterly Reports on Form 10-Q for the quarter ended March 31, 2008, filed on
May 9, 2008, for the quarter ended June 30, 2008, filed on August 8, 2008, and
for the quarter ended September 30, 2008, filed on November 6,
2008;</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(c)&#160;&#160;Our
Current Reports on Form 8-K filed on February 28, 2008 (Item 5.02 only), March
12, 2008, May 9, 2008, June 2, 2008, June 4, 2008, June 11, 2008, August 11,
2008 and September 17, 2008; and</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(d)&#160;&#160;The
description of our common stock contained in the registration statement on Form
8-A filed on May 27, 1997 (File No. 1-13045), as amended by Amendment No. 1 to
Form 8-A filed on June 3, 2005 and all further amendments or reports filed for
the purpose of updating such description.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">All documents
subsequently filed by us 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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">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.&#160;&#160;Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this registration statement.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
      </div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Item
8. Exhibits.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">The following
exhibits are filed as part of this registration statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">EXHIBIT
INDEX</font><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left">
      <table cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td align="left" valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana"><font style="DISPLAY: inline; FONT-WEIGHT: bold">EXHIBIT
    NO.&#160;</font></font></td>
            <td align="left" valign="top" width="85%"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana"><font style="DISPLAY: inline; FONT-WEIGHT: bold">DESCRIPTION</font></font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">&#160;</font></td>
            <td align="left" valign="top" width="85%"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">&#160;</font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">4.1</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Amended and
      Restated Certificate of Incorporation of the Company, as amended. <font style="DISPLAY: inline; FONT-STYLE: italic">(Incorporated by reference to
      the registrant's Annual Report on Form 10-K for the year ended December
      31, 2006).</font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">4.2</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Amended and
      Restated Bylaws of the registrant <font style="DISPLAY: inline; FONT-STYLE: italic">(Incorporated by reference to
      the registrant's Current Report on Form 8-K dated September 17,
      2008)</font>.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">5.1</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Opinion of
      Sullivan &amp; Worcester LLP.*</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">23.1</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Consent of
      Sullivan &amp; Worcester LLP <font style="DISPLAY: inline; FONT-STYLE: italic">(Contained in the opinion of
      Sullivan &amp; Worcester LLP filed herewith as Exhibit
      5.1).</font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">23.2</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Consent of
      Deloitte &amp; Touche LLP.*</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">24</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Powers of
      Attorney <font style="DISPLAY: inline; FONT-STYLE: italic">(Included in
      the signature page to this registration statement).</font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">99.1</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Iron
      Mountain Incorporated 2002 Stock Incentive Plan. <font style="DISPLAY: inline; FONT-STYLE: italic">(Incorporated by reference to
      the registrant's Annual Report on Form 10-K for the year ended December
      31, 2002).</font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">99.2</font></div>
            </td>
            <td align="left" valign="top" width="85%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Third
      Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan.
      <font style="DISPLAY: inline; FONT-STYLE: italic">(Incorporated by
      reference to Appendix A of the registrant's Proxy Statement</font> <font style="DISPLAY: inline; FONT-STYLE: italic">for the 2008 Annual Meeting of
      Stockholders filed April 21,
2008).</font></font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">___________</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">* filed
herewith</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Item
9. Undertakings.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>(a) The undersigned registrant hereby
undertakes:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 72pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(1)&#160;&#160;To
file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 108pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(i)&#160;&#160;To
include any prospectus required by Section 10(a)(3) of the Securities Act of
1933;</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 108pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(ii)&#160;&#160;To
reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the registration
statement.&#160;&#160;Notwithstanding the foregoing, any increase or decrease
in</font></div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
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      <div id="PN" style="PAGE-BREAK-AFTER: always">
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</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">volume of
securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20 percent change in the
maximum aggregate offering price set forth in the &#8220;Calculation of Registration
Fee&#8221; table in the effective registration statement; and</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 108pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(iii)&#160; To
include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to
such information in the registration statement;</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">provided,
however, that Paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in reports filed with or furnished to the Commission by
the registrant pursuant to section 13 or section 15(d) of the Securities
Exchange Act of 1934 that are incorporated by reference in the registration
statement.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 72pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(2)&#160;&#160;That,
for the purpose of determining any liability under the Securities Act of 1933,
each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 72pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(3)&#160;&#160;&#160;To
remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the
offering.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">(b)&#160;&#160;The
undersigned registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the registrant&#8217;s
annual report pursuant to section 13(a) or section 15(d) of the Securities
Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
plan&#8217;s annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the registration statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>(c)&#160;&#160;Insofar as indemnification for
liabilities arising under the Securities Act of 1933 may be permitted to
directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Act and is, therefore,
unenforceable.&#160;&#160;In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
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        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Pursuant to the
requirements of the Securities Act of 1933, the registrant 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&#160;12th day of November,
2008.</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 252pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Verdana">IRON
MOUNTAIN INCORPORATED</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
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Brennan</font></div>
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and Chief Executive Officer</font></div>
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    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
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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.&#160;&#160;The undersigned officers and directors of the
registrant hereby severally constitute and appoint Robert T. Brennan and Brian
P. McKeon, 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.</font></div>
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          <tr>
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana"><font style="TEXT-DECORATION: underline">/s/ <font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana; TEXT-DECORATION: underline">Robert
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      12, 2008</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="27%">
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          <tr>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">Executive
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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      12, 2008</font></div>
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">November
      12, 2008</font></div>
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          </tr>
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            <td align="left" valign="top" width="27%">
              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: verdana">November
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              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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            <td align="left" valign="top" width="27%">
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{"company-data": {"conformed-name": "IRON MOUNTAIN INC", "cik": "0001020569", "assigned-sic": "4220", "irs-number": "232588479", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-155304", "film-number": "081181084"}, "business-address": {"street1": "745 ATLANTIC AVENUE", "city": "BOSTON", "state": "MA", "zip": "02111", "phone": "6175354766"}, "mail-address": {"street1": "745 ATLANTIC AVENUE", "city": "BOSTON", "state": "MA", "zip": "02111"}, "former-company": [{"former-conformed-name": "IRON MOUNTAIN INC/PA", "date-changed": "20000201"}, {"former-conformed-name": "PIERCE LEAHY CORP", "date-changed": "19960807"}]}
imis_s8.htm
As filed with the Securities and
Exchange Commission on November 12, 2008
Registration No.
333-
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 Its Charter)
Delaware
(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)
Robert T.
Brennan
President and
Chief Executive Officer
Iron Mountain
Incorporated
745 Atlantic
Avenue
Boston,
Massachusetts 02111
(617)
535-4766
(Name,
Address and Telephone Number of Agent For Service)
COPY
TO:
William J. Curry,
Esq.
Sullivan &
Worcester LLP
One Post Office
Square
Boston,
Massachusetts 02109
(617)
338-2800
_____________________________
Indicate by check
mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer or a small reporting company. See the definitions of
"large accelerated filer," "accelerated filer" and "smaller reporting company"
in Rule 12b-2 of the Exchange Act. (Check one):
Large
      accelerated filer
ý
Accelerated
      filer
o
Non-accelerated
      filer
o
Smaller
      reporting company
o
(Do not
      check if a smaller reporting
company)
CALCULATION
OF REGISTRATION FEE
Title
      of Each Class of Securities to
be
      Registered
Amount
      to be
Registered(1)
Proposed
      Maximum
Offering
      Price Per Share(2)
Proposed
      Maximum Aggregate Offering Price(2)
Amount
      of Registration
Fee
Common
      Stock, $0.01 par value per share
7,500,000
$22.805
$171,037,500
$6,721.78
(1)           In
accordance with Rule 416 under the Securities Act of 1933, this
registration statement shall be deemed to cover any additional securities that
may from time to time be offered or issued to prevent dilution resulting from
stock splits, stock dividends or similar transactions.
(2)           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 November 11,
2008.
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 (the
"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), as amended by Post-Effective Amendment No. 1 to Form
S-8 dated June 3, 2005; the Registration Statement on Form S-8 dated August 18,
2004 (File No. 333-118322), as amended by Post-Effective Amendment No. 1 to Form
S-8 dated June 3, 2005; the Registration Statement on Form S-8 dated November
12, 2004 (File No. 333-120395), as amended by Post-Effective Amendment No. 1 to
Form S-8 dated June 3, 2005; and the Registration Statement on Form S-8 dated
November 15, 2006 (File No. 333-138716) of Iron Mountain Incorporated
(collectively, the "Prior Registration Statement").
Registration
of Additional Securities – Explanatory Note
We are filing this registration statement to
register an additional 7,500,000 shares of our common stock for issuance under
the Plan. The increase in the number of shares authorized for issuance under the
Plan was approved by our stockholders at our 2008 annual meeting held on June 5,
2008.  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, Item 8 and Item 9 of Part II of the Prior Registration Statement,
which are 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 us with the Securities and
Exchange Commission (the "Commission"), are incorporated by reference in and
made a part of this registration statement, as of their respective
dates:
(a)  Our
Annual Report on Form 10-K for the fiscal year ended December 31, 2007, filed on
February 29, 2008;
(b)  Our
Quarterly Reports on Form 10-Q for the quarter ended March 31, 2008, filed on
May 9, 2008, for the quarter ended June 30, 2008, filed on August 8, 2008, and
for the quarter ended September 30, 2008, filed on November 6,
2008;
(c)  Our
Current Reports on Form 8-K filed on February 28, 2008 (Item 5.02 only), March
12, 2008, May 9, 2008, June 2, 2008, June 4, 2008, June 11, 2008, August 11,
2008 and September 17, 2008; and
(d)  The
description of our common stock contained in the registration statement on Form
8-A filed on May 27, 1997 (File No. 1-13045), as amended by Amendment No. 1 to
Form 8-A filed on June 3, 2005 and all further amendments or reports filed for
the purpose of updating such description.
All documents
subsequently filed by us 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.
The following
exhibits are filed as part of this registration statement:
EXHIBIT
INDEX
EXHIBIT
    NO.
DESCRIPTION
4.1
Amended and
      Restated Certificate of Incorporation of the Company, as amended.
(Incorporated by reference to
      the registrant's Annual Report on Form 10-K for the year ended December
      31, 2006).
4.2
Amended and
      Restated Bylaws of the registrant
(Incorporated by reference to
      the registrant's Current Report on Form 8-K dated September 17,
      2008)
.
5.1
Opinion of
      Sullivan & Worcester 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
      Deloitte & Touche LLP.*
24
Powers of
      Attorney
(Included in
      the signature page to this registration statement).
99.1
Iron
      Mountain Incorporated 2002 Stock Incentive Plan.
(Incorporated by reference to
      the registrant's Annual Report on Form 10-K for the year ended December
      31, 2002).
99.2
Third
      Amendment to the Iron Mountain Incorporated 2002 Stock Incentive Plan.
(Incorporated by
      reference to Appendix A of the registrant's Proxy Statement
for the 2008 Annual Meeting of
      Stockholders filed April 21,
2008).
___________
* filed
herewith
Item
9. Undertakings.
(a) The undersigned registrant hereby
undertakes:
(1)  To
file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:
(i)  To
include any prospectus required by Section 10(a)(3) of the Securities Act of
1933;
(ii)  To
reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the registration
statement.  Notwithstanding the foregoing, any increase or decrease
in
volume of
securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20 percent change in the
maximum aggregate offering price set forth in the "Calculation of Registration
Fee" table in the effective registration statement; and
(iii)  To
include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to
such information in the registration statement;
provided,
however, that Paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in reports filed with or furnished to the Commission by
the registrant pursuant to section 13 or section 15(d) of the Securities
Exchange Act of 1934 that are incorporated by reference in the registration
statement.
(2)  That,
for the purpose of determining any liability under the Securities Act of 1933,
each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.
(3)   To
remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the
offering.
(b)  The
undersigned registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the registrant's
annual report pursuant to section 13(a) or section 15(d) of the Securities
Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the registration statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
(c)  Insofar as indemnification for
liabilities arising under the Securities Act of 1933 may be permitted to
directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Act and is, therefore,
unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
SIGNATURES
Pursuant to the
requirements of the Securities Act of 1933, the registrant 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 12th day of November,
2008.
IRON
MOUNTAIN INCORPORATED
By:
/s/ Robert T. Brennan
Name: Robert T.
Brennan
Title:   President
and Chief Executive Officer
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
registrant hereby severally constitute and appoint Robert T. Brennan and Brian
P. McKeon, 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/
Robert
      T. Brennan
Robert T.
      Brennan
President,
      Chief Executive Officer and Director
(Principal
      Executive Officer)
November
      12, 2008
/s/
      Brian P. McKeon
Brian P.
      McKeon
Chief
      Financial Officer (Principal Financial Officer and Principal Accounting
      Officer)
November
      12, 2008
/
s/
C.
      Richard Reese
C. Richard
      Reese
Executive
      Chairman of the Board and Director
November
      12, 2008
/s/
Clarke
      H. Bailey
Clarke H.
      Bailey
Director
November
      12, 2008
/s/
Constantin
      R. Boden
Constantin
      R. Boden
Director
November
      12, 2008
/s/
Kent
      P. Dauten
Kent P.
      Dauten
Director
November
      12, 2008
/s/
Michael
      Lamach
Michael
      Lamach
Director
November
      12, 2008
/s/
Arthur
      D. Little
Arthur D.
      Little
Director
November
      12, 2008
/s/
Vincent
      J. Ryan
Vincent J.
      Ryan
Director
November
      12, 2008
/s/
Laurie
      A. Tucker
Laurie A.
      Tucker
Director
November
      12, 2008