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 *
  Day Roderick
2. Date of Event Requiring Statement (Month/Day/Year)
11/01/2013
3. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [IRM]
(Last)
(First)
(Middle)
C/O IRON MOUNTAIN INCORPORATED, 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)
Chief Financial Officer
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 1,480
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
Performance Units   (1)   (1) Common Stock 964 $ (2) D  
Performance Units   (3)   (3) Common Stock 1,701 $ (2) D  
Restricted Stock Units 03/11/2014 03/11/2014 Common Stock 147 $ (4) D  
Restricted Stock Units   (5)   (5) Common Stock 1,271 $ (4) D  
Restricted Stock Units   (6)   (6) Common Stock 5,593 $ (4) D  
Restricted Stock Units   (7)   (7) Common Stock 1,572 $ (4) D  
Employee Stock Option (Right to Buy)   (8) 09/01/2018 Common Stock 842 $ 23.8425 D  
Employee Stock Option (Right to Buy)   (9) 06/04/2019 Common Stock 6,323 $ 25.3112 D  
Employee Stock Option (Right to Buy)   (10) 12/10/2019 Common Stock 14,256 $ 21.0436 D  
Employee Stock Option (Right to Buy)   (11) 06/03/2020 Common Stock 5,495 $ 21.8337 D  
Employee Stock Option (Right to Buy) 03/11/2014 03/11/2021 Common Stock 1,149 $ 25.0925 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Day Roderick
C/O IRON MOUNTAIN INCORPORATED
745 ATLANTIC AVENUE
BOSTON, MA 02111
      Chief Financial Officer  

Signatures

/s/ Sarah Cammarata, under Power of Attorney dated October 11, 2013, from Roderick Day 11/07/2013
**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) The performance units ("PUs") will fully vest on March 11, 2014, subject to certain exceptions, if the Reporting Person is, as of that date, continuing to perform services for Iron Mountain Incorporated.
(2) Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
(3) The PUs will 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.
(4) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Common Stock.
(5) The RSUs vest in two substantially equal installments on March 9, 2014 and March 9, 2015.
(6) The RSUs vest in two substantially equal installments on June 13, 2014 and June 13, 2015.
(7) The RSUs were granted to the Reporting Person on March 15, 2013 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
(8) This option is fully vested.
(9) 3,160 shares of this option have vested. The remaining shares vest on June 4, 2014.
(10) This option vests in two substantially equal annual installments on December 10, 2013 and December 10, 2014.
(11) 3,294 shares of this option have vested. The remaining shares vest in two substantially equal installments on June 3, 2014 and June 3, 2015.

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