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 *
  Fox Raymond
2. Date of Event Requiring Statement (Month/Day/Year)
02/14/2018
3. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [IRM]
(Last)
(First)
(Middle)
C/O IRON MOUNTAIN INCORPORATED, ONE FEDERAL STREET
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP and Chief Risk Officer
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BOSTON, MA 02110
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 1,682
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
Restricted Stock Units   (1)   (1) Common Stock 1,065 $ (2) D  
Restricted Stock Units   (3)   (3) Common Stock 848 $ (2) D  
Restricted Stock Units   (4)   (4) Common Stock 1,081 $ (2) D  
Employee Stock Option (Right to Buy)   (5) 07/21/2025 Common Stock 10,695 $ 31.36 D  
Employee Stock Option (Right to Buy)   (6) 03/09/2026 Common Stock 4,496 $ 31.46 D  
Employee Stock Option (Right to Buy)   (7) 02/16/2027 Common Stock 3,647 $ 37 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Fox Raymond
C/O IRON MOUNTAIN INCORPORATED
ONE FEDERAL STREET
BOSTON, MA 02110
      EVP and Chief Risk Officer  

Signatures

/s/ Elizabeth Tammaro, under Power of Attorney dated February 13, 2018 from Raymond Fox 02/20/2018
**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 restricted stock units ("RSUs"), representing a contingent right to receive a total of 3,188 shares of Iron Mountain Incorporated common stock ("Common Stock"), were granted to the Reporting Person on July 21, 2015. As of February 14, 2018, 2,123 of the granted RSUs have vested, and the balance of the RSUs vest on July 21, 2018.
(2) Each RSU represents a contingent right to receive one share of Common Stock.
(3) The RSUs, representing a contingent right to receive a total of 1,271 shares of Common Stock, were granted to the Reporting Person on March 9, 2016. As of February 14, 2018, 423 of the granted RSUs have vested, and the balance of the RSUs vest in two substantially equal annual installments beginning on the second anniversary of the grant date.
(4) The RSUs, representing a contingent right to receive a total of 1,081 shares of Common Stock, were granted to the Reporting Person on February 16, 2017 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
(5) This stock option was granted on July 21, 2015. As of February 14, 2018, this stock option has vested with respect to 7,122 shares. The remaining shares vest on the third anniversary of the grant date.
(6) This stock option was granted on March 9, 2016. As of February 14, 2018, this stock option has vested with respect to 1,497 shares. The remaining shares vest in two substantially equal annual installments beginning on the second anniversary of the grant date.
(7) This stock option was granted on February 16, 2017. As of February 14, 2018, this stock option will vest in three substantially equal installments beginning on the first anniversary of the grant date.

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