IRON MOUNTAIN INC — Director's Dealing 2011

Jun 14, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2011-06-10

Reporting Person: LITTLE ARTHUR D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-06-10	Common Stock, par value, $.01 per share	A	1554	—	Acquired	1554	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-06-10	Phantom Stock	$0.01	A	1555	Acquired		Common Stock (1555)	Direct

Footnotes

F1: Consists of shares issuable upon the settlement of restricted stock units granted on June 10, 2011. The restricted stock units shall vest on the one year anniversary of the grant date (or, if earlier, the annual meeting of stockholders that is closest to the one year anniversary).

F2: Pursuant to Mr. Little's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units received on June 10, 2011, which restricted stock units shall vest on the one year anniversary of the grant date (or, if earlier, the annual meeting of stockholders that is closest to the one year anniversary), the shares of phantom stock become payable in Iron Mountain Incorporated common stock following Mr. Little's disability or cessation of service as a director. Each share of phantom stock is the economic equivalent of one share of common stock.