IRON MOUNTAIN INC — Director's Dealing 2012

Jun 18, 2012

SEC Form 4/A — Form 4/A

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2012-04-17

Reporting Person: RYAN VINCENT J (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-17	Phantom Stock	$	A	68.9333	Acquired		Common Stock (68.9333)	Direct

Footnotes

F1: This Amendment is being filed to correct the total shares of phantom stock beneficially owned by the Reporting Person reflected in column 9 of this Form 4. The line item is being included in this filing merely to gain access to the EDGAR filing system, not to report a new transaction.

F2: Pursuant to Mr. Ryan's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock become payable in shares of common stock following Mr. Ryan's disability or cessation of service as a director. Each share of phantom stock is the economic equivalent of one share of common stock.

F3: These shares give effect to dividends paid on common stock as if reinvested in phantom stock.

F4: This Amendment is being filed in connection with the transition by New York Life Investment Management LLC, the record-keeper for the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "Plan"), from a unitized accounting method to a share accounting method for the Plan. As part of the transition, an adjustment was made to reflect an aggregate historical record-keeping error in the amount of 2.0147 additional shares of phantom stock not previously reported. This Amendment is being filed to reflect the updated total shares of phantom stock beneficially owned by the Reporting Person.