IRON MOUNTAIN INC — Director's Dealing 2015

Sep 9, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2015-09-08

Reporting Person: Tomovcsik John (EVP, G. Mgr., Rec. & Inf. Mgmt)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-09-08	Common Stock, par value $.01 per share	M	3650	—	Acquired	29511	Direct
2015-09-08	Common Stock, par value $.01 per share	F	1112	$28.58	Disposed	28399	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-09-08	Restricted Stock Units	$	M	3650	Disposed		Common Stock (3650)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on September 8, 2011.

F2: Includes 648 shares acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

F3: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4: The RSUs, representing a contingent right to receive a total of 13,774 shares of Common Stock, were granted to the Reporting Person on September 8, 2011 and have vested in four substantially equal annual installments, the last of which was on September 8, 2015. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 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.