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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1. Name and Address of Reporting Person *   Keddy Patrick J 2. Date of Event Requiring Statement (Month/Day/Year) 04/02/2015 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) Exec VP & GM, N. A. & W. Europ 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 6,563 D Â

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	991	$ (2)	D	Â
Restricted Stock Units	03/15/2016	03/15/2016	Common Stock	474	$ (3)	D	Â
Restricted Stock Units	  (4)	  (4)	Common Stock	2,641	$ (3)	D	Â
Restricted Stock Units	  (5)	  (5)	Common Stock	2,575	$ (3)	D	Â
Employee Stock Option (Right to Buy)	  (6)	11/29/2021	Common Stock	42,843	$ 24.0827	D	Â
Employee Stock Option (Right to Buy)	  (7)	02/13/2024	Common Stock	7,011	$ 24.8037	D	Â
Employee Stock Option (Right to Buy)	  (8)	02/19/2025	Common Stock	7,133	$ 38.83	D	Â

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	Â	Â	  Exec VP & GM, N. A. & W. Europ	Â

Signatures

/s/ Sarah Cammarata, under Power of Attorney dated April 8, 2015, from Patrick Keddy		04/13/2015
**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 15, 2016, 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)	Each restricted stock unit ("RSU") represents a contingent right to receive one share of Common Stock.
(4)	The RSUs vest in two substantially equal installments on February 13, 2016 and Feburary 13, 2017.
(5)	The RSUs were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
(6)	This option is fully vested.
(7)	This option has vested with respect to 2,344 shares. The remaining shares vest in two substantially equal installments beginning on February 13, 2016.
(8)	This option vests in three substantially equal installments on February 19, 2016, February 19, 2017 and February 19, 2018.

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