IRON MOUNTAIN INC — Director's Dealing 2017

May 23, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2017-05-19

Reporting Person: DAUTEN KENT P (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-19	Common Stock, par value $.01 per share	M	8798	$22.429	Acquired	2008798	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-19	Employee Stock Option (Right to Buy)	$22.429	M	8798	Disposed	2017-05-23	Common Stock (8798)	Direct

Footnotes

F1: This stock option, representing a right to purchase a total of 8,798 shares of Common Stock, is fully vested. The number of stock options granted includes previously reported adjustments effective on September 26, 2014 made in connection with the special distribution declared by the Board of Directors of Iron Mountain Incorporated on September 15, 2014 and paid on November 4, 2014.