Sec Form 4 Filing - Duale Marc A @ IRON MOUNTAIN INC - 2016-06-20

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 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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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 (MM/DD/YY) 06/20/2016 (Street) LONDON, X0SE1 2TT 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 06/20/2016 S( 1 ) 9,000 D $ 38.25 31,011 D Common Stock, par value $.01 per share 06/20/2016 M( 1 ) 8,757 A $ 24.804 39,768 D Common Stock, par value $.01 per share 06/20/2016 S( 1 ) 8,757 D $ 38.25 31,011 D Common Stock, par value $.01 per share 06/20/2016 M( 1 ) 11,345 A $ 22.036 42,356 D Common Stock, par value $.01 per share 06/20/2016 S( 1 ) 11,345 D $ 38.25 31,011 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Employee Stock Option (Right to Buy) $ 24.804 06/20/2016 M( 1 ) 8,757 ( 2 ) 02/13/2024 Common Stock 8,757 $ 0 8,783 D Employee Stock Option (Right to Buy) $ 22.036 06/20/2016 M( 1 ) 11,345 ( 3 ) 03/01/2019 Common Stock 11,345 $ 0 11,347 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Duale Marc A THIRD FLOOR, COTTONS CENTRE, TOOLEY STREET LONDON, X0SE1 2TT President, Iron Mountain Int'l Signatures /s/ Elizabeth Tammaro, under Power of Attorney dated May 26, 2016, from Marc A. Duale 06/22/2016 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of May 19, 2016. ( 2 )This stock option, representing a right to purchase a total of 17,540 shares, vests in substantially equal annual installments on February 13 of each year until 2017. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made 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"). ( 3 )This stock option, representing a right to purchase a total of 22,692 shares, vests in substantially equal annual installments on March 2 of each year until 2017. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made in connection with the Special Distribution.

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