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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Drapeau Anne S
  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)
EVP, Strategy and Talent
(Last)
(First)
(Middle)
C/O IRON MOUNTAIN INCORPORATED, ONE FEDERAL STREET
3. Date of Earliest Transaction (Month/Day/Year)
03/09/2015
(Street)

BOSTON, MA 02110
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 03/09/2015   M   11,042 (1) A $ 0 37,549 D  
Common Stock, par value $.01 per share 03/09/2015   F   3,648 D $ 36.42 33,901 D  
Common Stock, par value $.01 per share 03/09/2015   M   4,127 (2) A $ 0 38,028 D  
Common Stock, par value $.01 per share 03/09/2015   F   1,341 D $ 36.42 36,687 D  
Common Stock, par value $.01 per share 03/10/2015   S(3)   5,090 D $ 36.29 31,597 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Performance Units (4) 03/09/2015   M     11,042   (5)   (5) Common Stock 11,042 $ 0 0 D  
Restricted Stock Units (6) 03/09/2015   M     4,127   (7)   (7) Common Stock 4,127 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Drapeau Anne S
C/O IRON MOUNTAIN INCORPORATED
ONE FEDERAL STREET
BOSTON, MA 02110
      EVP, Strategy and Talent  

Signatures

 /s/ Garry B. Watzke, under Power of Attorney dated November 1, 2013, from Anne S. Drapeau   03/11/2015
**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 full vesting of performance units ("PUs") previously granted to the Reporting Person on March 9, 2012.
(2) This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 9, 2012.
(3) This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of August 8, 2014.
(4) Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
(5) The PUs fully vested on March 9, 2015. The number of PUs granted includes previously reported PUs allocated on November 4, 2014 in connection with the special distribution declared by the Board of Directors of Iron Mountain Incorporated on September 15, 2014 and paid on November 4, 2014 (the "Special Distribution").
(6) Each RSU represents a contingent right to receive one share of Common Stock.
(7) The RSUs, representing a contingent right to receive a total of 11,733 shares of Common Stock, were granted to the Reporting Person on March 9, 2012 and have vested in full in three substantially equal annual installments, the last of which was on March 9, 2015. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 in connection with the Special Distribution.

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