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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Keddy Patrick J 		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)
Exec.VP,GM,N.America,W.Europe
(Last)          (First)          (Middle)

C/O IRON MOUNTAIN INCORPORATED, ONE FEDERAL STREET 		3. Date of Earliest Transaction (MM/DD/YYYY)

10/11/2017
(Street)

BOSTON, MA 02110
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   10/11/2017     M (1)    7011   A $24.804   19599   D    
Common Stock, par value $.01 per share   10/11/2017     S (1)    7011   D $39.142   (2) 12588   D    
Common Stock, par value $.01 per share   10/11/2017     M (1)    16417   A $29.270   29005   D    
Common Stock, par value $.01 per share   10/11/2017     S (1)    16417   D $39.000   12588   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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
Employee Stock Option (Right to Buy)   $24.804   10/11/2017     M   (1)       7011      (3) 2/13/2024   Common Stock   7011   $0   0   D    
Employee Stock Option (Right to Buy)   $29.270   10/11/2017     M   (1)       16417      (4) 2/18/2026   Common Stock   16417   $0   32884   D    

Explanation of Responses:
(1)  This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 8, 2017.
(2)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.000 to $39.215, inclusive. The Reporting Person undertakes to provide to Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2).
(3)  This stock option, representing a right to purchase a total of 7,011 shares, is fully vested.
(4)  This stock option, representing a right to purchase a total of 49,301 shares, has vested with respect to 16,417 shares. The remaining shares become exercisable in two substantially equal annual installments beginning on February 18, 2018.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Keddy Patrick J
C/O IRON MOUNTAIN INCORPORATED
ONE FEDERAL STREET
BOSTON, MA 02110

Exec.VP,GM,N.America,W.Europe

Signatures
/s/ Elizabeth Tammaro, under Power of Attorney dated May 26, 2016, from Patrick Keddy 10/13/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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.
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