IRON MOUNTAIN INC — Director's Dealing 2012

Nov 26, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2012-11-21

Reporting Person: LAMACH MICHAEL W (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-11-21	Common Stock, par value $.01 per share	A	276	—	Acquired	14047	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-11-21	Phantom Stock	$	A	190.9399	Acquired		Common Stock (190.9399)	Direct

Footnotes

F1: This report reflects shares received by the Reporting Person as a result of the Reporting Person's receipt of his pro rata portion of a special dividend declared by the Board of Directors of the issuer on October 11, 2012 and paid on November 21, 2012 (the "Special Dividend").

F2: Includes 376 previously unreported shares (the "Shares") allocated on November 21, 2012 in connection with the Special Dividend. The Shares are issuable upon the settlement of restricted stock units ("RSUs") granted on June 14, 2012, which RSUs 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).

F3: 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.

F4: These shares give effect to dividends paid on common stock as if reinvested in phantom stock.