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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(Print or Type Responses)

1. Name and Address of Reporting Person * REESE C RICHARD   2. Issuer Name and Ticker or Trading Symbol IRON MOUNTAIN INC [IRM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Chairman (Last) (First) (Middle) 100 BELVIDERE STREET, APT. 9F 3. Date of Earliest Transaction (Month/Day/Year) 08/27/2009 (Street) BOSTON, MA 02199 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 08/27/2009   S(1)   89,100 D $ 30.1486 (2) 605,097 D   Common Stock, par value, $.01 per share 08/28/2009   S(1)   7,397 D $ 30.5375 (3) 597,700 D   Common Stock, par value, $.01 per share               1,222,086 (4) I Shares held in family owned LLC Common Stock, par value, $.01 per share               2,950,590 (5) I By contract

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
REESE C RICHARD 100 BELVIDERE STREET, APT. 9F BOSTON, MA 02199	X		Executive Chairman

Signatures

/s/ Ernest W. Cloutier, under Power of Attorney dated June 5, 2008 from C. Richard Reese		08/31/2009
**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 sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 18, 2009.
(2)	Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $30.00 to $30.36 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, Iron Mountain Incorporated, or a security holder of Iron Mountain Incorporated, full information regarding the number of shares sold at each separate price.
(3)	Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $30.50 to $30.62 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, Iron Mountain Incorporated, or a security holder of Iron Mountain Incorporated, full information regarding the number of shares sold at each separate price.
(4)	Mr. Reese's wife and a trust for the benefit of Mr. Reese's children own all of the interests in the Reese Family 2005 LLC ("LLC"). Mr. Reese is the investment manager of the LLC and therefore has control over the sale or distribution of any shares held by the LLC, the timing of such sales or distributions, and the use of the proceeds of any sale or distributions. Mr. Reese disclaims beneficial ownership of all securities held by the LLC and this report should not be deemed an admission that the reporting person is beneficial owner of such securities for purposes of Section 16 of the Exchange Act of 1934, as amended, or for any purpose.
(5)	Mr. Reese shares beneficial ownership of these shares with Schooner Capital Corporation as a result of a 1988 deferred compensation arrangement, as amended, between Schooner Capital LLC ("Schooner") and Mr. Reese relating to Mr. Reese's former services as President of the predecessor corporation to Schooner. Pursuant to such arrangement, Mr. Reese is entitled to receive benefits equivalent to the fair market value of such shares with payments to Mr. Reese commencing on the first business day of 2013 and payable in ten annual installments; however, Mr. Reese has the right to defer the commencement of such installments in certain circumstances. In addition, any unpaid benefits pursuant to this arrangement shall be payable to Mr. Reese's beneficiary(ies) in a lump sum upon his death. Benefits pursuant to this arrangement are payable in cash or, at Mr. Reese's election, common stock.

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