SEC FORM 3

SEC Form 3

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
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

CLANCY JOHN

(Last)

(First)

(Middle)

C/O IRON MOUNTAIN DIGITAL

745 ATLANTIC AVENUE

(Street)

BOSTON

02111

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/07/2008

3. Issuer Name and Ticker or Trading Symbol
IRON MOUNTAIN INC [ IRM ]

4. 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

5. If Amendment, Date of 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

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	0	D

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy)	11/03/2004⁽¹⁾	04/27/2014	Common Stock	3,307	$9.977	D
Employee Stock Option (Right to Buy)	04/27/2006⁽²⁾	04/26/2015	Common Stock	53,802	$18.5866	D
Employee Stock Option (Right to Buy)	12/08/2006⁽³⁾	12/07/2015	Common Stock	69,043	$28.9666	D
Employee Stock Option (Right to Buy)	03/02/2008⁽⁴⁾	03/01/2017	Common Stock	73,584	$27.18	D
Employee Stock Option (Right to Buy)	03/02/2008⁽⁵⁾	03/01/2019	Common Stock	73,583	$27.18	D

Explanation of Responses:

1. Vesting for this stock option grant commenced 11/3/04. As of this date, 3,169 shares have vested. 69 shares will vest 3/28/08 and 69 shares will vest 4/28/08.

2. This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 21,519 shares have vested.

3. This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 27,616 shares have vested.

4. This stock option grant vests 20% annually for 5 years on the anniversary date of the option grant. As of this date, 14,716 shares have vested.

5. This stock option grant vests 10% annually for 10 years on the anniversary date of the option grant. As of this date, 7,358 shares have vested.

Remarks:

	/s/ John Clancy	03/17/2008
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.