<SUBMISSION>
<ACCESSION-NUMBER>0000908737-04-000010
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20040109
<ITEMS>9
<FILING-DATE>20040109
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>IRON MOUNTAIN INC/PA
<CIK>0001020569
<ASSIGNED-SIC>4220
<IRS-NUMBER>232588479
<STATE-OF-INCORPORATION>PA
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-13045
<FILM-NUMBER>04517770
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>745 ATLANTIC AVENUE
<CITY>BOSTON
<STATE>MA
<ZIP>02111
<PHONE>6175354766
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>745 ATLANTIC AVENUE
<CITY>BOSTON
<STATE>MA
<ZIP>02111
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>PIERCE LEAHY CORP
<DATE-CHANGED>19960807
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>imis8k_jan9.htm
<TEXT>
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     <!-- Client Name:    IRON MOUNT INCORPORATED                                          -->
     <!-- Project Name:   8K - January 9, 2004                                             -->
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<A NAME=A003></A>
<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE="4">UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</FONT><BR><BR>
<FONT FACE="Times New Roman, Times, Serif" SIZE="3">WASHINGTON, D.C. 20549</FONT></H1>

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<A NAME=A004></A>
<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=4>FORM 8-K<BR><BR>
CURRENT REPORT</FONT></H1>

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<A NAME=A005></A>
<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>PURSUANT TO
SECTION 13 OR 15(d) OF THE <BR>SECURITIES EXCHANGE ACT OF 1934<BR> </FONT></H1>


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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Date
of Report (Date of earliest event reported): January 9, 2004  </FONT></P>

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<A NAME=A009></A>
<p ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE="4"><B>IRON MOUNTAIN INCORPORATED </B></FONT><BR>
<FONT FACE="Times New Roman, Times, Serif" SIZE="2">(Exact name of registrant as
specified in charter) </FONT> </p>


<p ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B>PENNSYLVANIA </B><BR>(State or other jurisdiction of incorporation) </FONT><BR>
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<TR VALIGN="TOP" ALIGN="CENTER">
     <TD WIDTH="10%">&nbsp;</TD>
     <TD WIDTH="40%"><FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B> 1-13045 </B><BR>(Commission file number) </FONT></TD>
     <TD WIDTH="50%"><FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B>23-2588479 </B><BR>(I.R.S. employer identification number) </FONT> </TD></TR>
</TABLE>
<BR><BR>


<P ALIGN="CENTER"> <FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B> 745 Atlantic Avenue<BR>
Boston, Massachusetts 02111</B><BR>(Address of principal executive offices, including zip code)
 </FONT> </P>
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<P ALIGN="CENTER"> <FONT FACE="Times New Roman, Times, Serif" SIZE="2"><B>(617) 535-4766</B><BR>(Registrant's telephone number, including area code)
 </FONT> </P>

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<page>
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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>ITEM 9. REGULATION FD DISCLOSURE. </FONT></P>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>On January 7, 2004, we previously
announced a proposed offering of &pound;125&nbsp;million in aggregate principal amount of
Senior Subordinated Notes due 2014. The notes are being sold only to qualified
institutional buyers under Rule&nbsp;144A and to persons outside the United States under
Regulation&nbsp;S of the Securities Act of 1933. As part of this offering, we may discuss
our financial guidance for 2004 and, in that regard, we are hereby reaffirming our
financial guidance for 2004 as originally released on November 20, 2003. </FONT></P>

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<page>

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<A NAME=A015></A>
<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>SIGNATURES </FONT></H1>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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.  </FONT></P>


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     <TD WIDTH="40%"><FONT FACE="Times New Roman, Times, Serif" SIZE="2"></FONT></TD>
     <TD WIDTH="60%"><FONT FACE="Times New Roman, Times, Serif" SIZE="3"><b>IRON MOUNTAIN INCORPORATED</b></font><BR>
     <FONT FACE="Times New Roman, Times, Serif" SIZE="2">(Registrant)<BR>
<BR>
<BR>
 By:&nbsp;/s/ Jean A. Bua<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Jean A. Bua<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vice President and Corporate Controller</FONT></TD>
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</TEXT>
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</SUBMISSION>
