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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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) EVP, GM, N. America, W.Europe (Last) (First) (Middle) C/O IRON MOUNTAIN INCORPORATED, ONE FEDERAL STREET 3. Date of Earliest Transaction (Month/Day/Year) 02/16/2018 (Street) BOSTON, MA 02110 4. If Amendment, Date Original Filed(Month/Day/Year) 02/22/2018 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 02/20/2018   M   1,005 (1) A $ 0 14,738 D   Common Stock, par value $.01 per share 02/20/2018   F   471 (2) D $ 32.12 14,267 D   Common Stock, par value $.01 per share 02/20/2018   M   4,853 (3) A $ 0 19,120 D   Common Stock, par value $.01 per share 02/20/2018   F   2,280 (2) D $ 32.12 16,840 D   Common Stock, par value $.01 per share 02/20/2018   M   861 (4) A $ 0 17,701 D   Common Stock, par value $.01 per share 02/20/2018   F   404 (2) D $ 32.12 17,297 D   Common Stock, par value $.01 per share 02/20/2018   M   2,560 (5) A $ 0 19,857 D   Common Stock, par value $.01 per share 02/20/2018   F   1,203 (2) D $ 32.12 18,654 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

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			EVP, GM, N. America, W.Europe

Signatures

/s/ Elizabeth Tammaro, under Power of Attorney dated May 26, 2016, from Patrick Keddy		05/22/2018
**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 transaction is being reported to reflect the full vesting of performance units ("PUs") initially granted to the Reporting Person on February 19, 2015. Effective February 16, 2018, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested on February 20, 2018.
(2)	This amendment is being filed to correct a clerical error in the number of shares withheld to satisfy the Reporting Person's tax obligation with respect to the vesting of PUs and restricted stock units ("RSUs").
(3)	This transaction is being reported to reflect the full vesting of PUs initially granted to the Reporting Person on May 27, 2015. Effective February 16, 2018, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested on February 20, 2018.
(4)	This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 19, 2015.
(5)	This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 18, 2016.

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