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 * CLANCY JOHN   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) Pres., Iron Mountain Digital (Last) (First) (Middle) C/O IRON MOUNTAIN DIGITAL, 745 ATLANTIC AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 08/21/2009 (Street) BOSTON, MA 02111 4. If Amendment, Date Original Filed(Month/Day/Year) 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 08/21/2009   M(1)   3,307 A $ 9.9771 5,899 (2) D   Common Stock, par value, $.01 per share 08/21/2009   M(1)   18,000 A $ 18.5867 23,899 D   Common Stock, par value, $.01 per share 08/21/2009   M(1)   20,000 A $ 18.5867 43,899 D   Common Stock, par value, $.01 per share 08/21/2009   S(1)   33,899 D $ 28.67 10,000 D   Common Stock, par value, $.01 per share 08/21/2009   S(1)   10,000 D $ 29 0 D

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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

Stock Option (Right to Buy)

$ 9.9771

08/21/2009

M(1)

3,307

(3)

04/27/2014

Common Stock

3,307

$ 0

0

D

Stock Option (Right to Buy)

$ 18.5867

08/21/2009

M(1)

18,000

(4)

04/26/2015

Common Stock

18,000

$ 0

7,860 (5)

D

Stock Option (Right to Buy)

$ 18.5867

08/21/2009

M(1)

20,000

(6)

04/26/2015

Common Stock

20,000

$ 0

7,942 (7)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CLANCY JOHN C/O IRON MOUNTAIN DIGITAL 745 ATLANTIC AVENUE BOSTON, MA 02111			Pres., Iron Mountain Digital

Signatures

/s/ John Clancy		08/25/2009
**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)	The exercises and sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 20, 2009. All shares covered under such plan have now been exercised and sold.
(2)	Includes 339 shares acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since March 7, 2008, the date on which the Reporting Person became a reporting officer under Section 16 of the Securities Exchange Act of 1934 ("Section 16"). The acquisition of such shares was exempt under Section 16.
(3)	These options vested from November 3, 2004 through April 28, 2008.
(4)	These options vested from April 27, 2006 through April 27, 2009.
(5)	Options for 2,480 of these shares are currently vested and options for the remaining 5,380 shares vest on April 27, 2010.
(6)	These options vested from April 27, 2006 through April 27, 2009.
(7)	Options for 2,559 of these shares are currently vested and options for the remaining 5,383 shares vest on April 27, 2010.

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