Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
Duale Marc A
   2. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [IRM] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President, Iron Mountain Int'l
(Last)
(First)
(Middle)
THIRD FLOOR, COTTONS CENTRE, TOOLEY STREET		 3. Date of Earliest Transaction (Month/Day/Year)
03/11/2013
(Street)

LONDON, X0 SE1 2TT		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, par value $.01 per share 03/11/2013   A   4,973 (1) A $ 0 6,116 D  
Common Stock, par value $.01 per share 03/11/2013   F   178 D $ 35.31 5,938 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units (2) 03/11/2013   D     1,171   (3)   (3) Common Stock 1,171 $ 0 1,176 D  
Restricted Stock Units (2) 03/11/2013   D     3,802   (4)   (4) Common Stock 3,802 $ 0 7,621 D  
Performance Units (5) 03/13/2013   A   10,212 (6)     (7)   (7) Common Stock 10,212 $ 0 10,212 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Duale Marc A
THIRD FLOOR, COTTONS CENTRE
TOOLEY STREET
LONDON, X0 SE1 2TT		       President, Iron Mountain Int'l  

Signatures

 /s/ Garry B. Watzke, under Power of Attorney dated December 2, 2010, from Marc A. Duale   03/13/2013
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.
(2) Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
(3) The RSUs, representing a contingent right to receive a total of 3,518 shares of Common Stock, were granted to the Reporting Person on March 11, 2011 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. The number of RSUs granted includes previously reported RSUs allocated on November 21, 2012 in connection with the Reporting Person's receipt of his pro rata portion of a special dividend declared by the Board of Directors of Iron Mountain Incorporated on October 11, 2012 and paid on November 21, 2012 (the "Special Dividend").
(4) The RSUs, representing a contingent right to receive a total of 11,423 shares of Common Stock, were granted to the Reporting Person on March 9, 2012 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date. The number of RSUs granted includes previously reported RSUs allocated on November 21, 2012 in connection with the Reporting Person's receipt of his pro rata portion of the Special Dividend.
(5) Each performance unit ("PU") represents a contingent right to receive one share of Common Stock.
(6) The PUs were previously granted to the Reporting Person on March 9, 2012, and on March 13, 2013 the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period.
(7) The PUs fully vest on March 9, 2015, subject to certain exceptions, if the Reporting Person is, as of that date, continuing to perform services for Iron Mountain Incorporated.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.