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 *
  CLANCY JOHN
 2. Date of Event Requiring Statement (Month/Day/Year)
03/07/2008		 3. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [IRM]
(Last)
(First)
(Middle)
C/O IRON MOUNTAIN DIGITAL, 745 ATLANTIC AVENUE		 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 Digital
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BOSTON, MA 02111		 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 0
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) 11/03/2004(1) 04/27/2014 Common Stock 3,307 $ 9.977 D  
Employee Stock Option (Right to Buy) 04/27/2006(2) 04/26/2015 Common Stock 53,802 $ 18.5866 D  
Employee Stock Option (Right to Buy) 12/08/2006(3) 12/07/2015 Common Stock 69,043 $ 28.9666 D  
Employee Stock Option (Right to Buy) 03/02/2008(4) 03/01/2017 Common Stock 73,584 $ 27.18 D  
Employee Stock Option (Right to Buy) 03/02/2008(5) 03/01/2019 Common Stock 73,583 $ 27.18 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
CLANCY JOHN
C/O IRON MOUNTAIN DIGITAL
745 ATLANTIC AVENUE
BOSTON, MA 02111		       Pres., Iron Mountain Digital  

Signatures

/s/ John Clancy 03/17/2008
**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) Vesting for this stock option grant commenced 11/3/04. As of this date, 3,169 shares have vested. 69 shares will vest 3/28/08 and 69 shares will vest 4/28/08.
(2) This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 21,519 shares have vested.
(3) This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 27,616 shares have vested.
(4) This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 14,716 shares have vested.
(5) This stock option grant vests 10% annually for 10 years on the anniversary date of the option grant. As of this date, 7,358 shares have vested.

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