IRON MOUNTAIN INC — Director's Dealing 2011

Apr 21, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2011-04-19

Reporting Person: LAMACH MICHAEL W (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-19	Phantom Stock	$	A	7.608	Acquired		Common Stock (7.608)	Direct

Footnotes

F1: Pursuant to Mr. Lamach's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock become payable in cash following Mr. Lamach's disability or cessation of service as a director. Each share of phantom stock is the economic equivalent of one share of common stock.

F2: These shares give effect to dividends paid on common stock as if reinvested in phantom stock.