Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Radtke Kenneth F Jr
 2. Date of Event Requiring Statement (Month/Day/Year)
03/15/2005		 3. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC/PA [IRM]
(Last)
(First)
(Middle)
IRON MOUNTAIN EUROPE LIMITED, THIRD FLOOR COTTONS CENTRE TOOLEY STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Pres. Iron Mountain Europe
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

LONDON, X0 SE1 2TT		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value, $.01 per share 1,279
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) 04/08/2001(1) 04/07/2006 Common Stock 49,006 $ 4.5556 D  
Employee Stock Option (Right to Buy) 09/13/2004(2) 09/12/2009 Common Stock 14,357 $ 14.9444 D  
Employee Stock Option (Right to Buy) 09/13/2001(3) 09/12/2009 Common Stock 1,173 $ 14.9444 D  
Employee Stock Option (Right to Buy) 04/24/2002(4) 04/23/2010 Common Stock 16,647 $ 15.0139 D  
Employee Stock Option (Right to Buy) 04/24/2001(5) 04/23/2010 Common Stock 36,638 $ 15.0139 D  
Employee Stock Option (Right to Buy) 03/21/2006(6) 03/20/2012 Common Stock 1,934 $ 20.7167 D  
Employee Stock Option (Right to Buy) 03/21/2003(7) 03/20/2012 Common Stock 10,145 $ 20.7167 D  
Employee Stock Option (Right to Buy) 03/27/2006(8) 03/26/2013 Common Stock 7,032 $ 25.6 D  
Employee Stock Option (Right to Buy) 03/27/2004(9) 03/26/2013 Common Stock 4,688 $ 25.6 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Radtke Kenneth F Jr
IRON MOUNTAIN EUROPE LIMITED
THIRD FLOOR COTTONS CENTRE TOOLEY STREET
LONDON, X0 SE1 2TT		       Pres. Iron Mountain Europe  

Signatures

Clare A. Dever, under Power of Attorney dated March 7, 2005. 03/22/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) All option shares for this ISO stock option grant were fully vested as of 4/8/01.
(2) All option shares for this ISO stock option grant were fully vested as of 9/13/2004.
(3) All option shares for this NQ stock option grant were fully vested as of 9/13/2001.
(4) Vesting commenced on 4/24/02. As of this date, there are 9,987 shares vested and the remainder 6,660 shares will vest on 4/24/2005.
(5) Vesting commenced on 4/24/01. As of this date, there are 32,639 shares vested and the remainder 3,999 shares will vest on 4/24/2005.
(6) On 3/21/06, 966 shares of the ISO stock option grant shall vest and on 3/21/07, an additional 968 shares shall vest.
(7) Vesting commenced on 3/21/03. As of this date, there are 7,245 shares vested for this NQ stock option grant and the remainder shares will vest as follows: 1,449 on 3/21/2006 and 1,451 on 3/21/2007.
(8) On 3/27/06, 2,343 shares of this ISO stock option grant shall vest; an additional 2,344 shares shall vest on 3/27/07 and an additional 2,345 shares shall vest on 3/27/08.
(9) There are 2,343 shares vested for this NQ stock option grant and the remainder shares of 2,345 for this NQ stock option grant will vest on 3/27/2005.

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