IRON MOUNTAIN INC — Director's Dealing 2011

May 9, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2011-05-06

Reporting Person: REESE C RICHARD (Director, CEO and Executive Chairman)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-06	Employee Stock Option (Right to Buy)	$31.835	A	50331	Acquired	2021-05-06	Common Stock (50331)	Direct

Footnotes

F1: This stock option becomes exercisable in three equal annual installments beginning on the first anniversary of the date of grant.