IRON MOUNTAIN INC — Director's Dealing 2015

Mar 11, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2015-03-09

Reporting Person: Duale Marc A (President, Iron Mountain Int'l)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-03-09	Common Stock, par value $.01 per share	M	11042	—	Acquired	37762	Direct
2015-03-09	Common Stock, par value $.01 per share	F	386	$36.42	Disposed	37376	Direct
2015-03-09	Common Stock, par value $.01 per share	M	4127	—	Acquired	41503	Direct
2015-03-09	Common Stock, par value $.01 per share	F	144	$36.42	Disposed	41359	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-03-09	Performance Units	$	M	11042	Disposed		Common Stock (11042)	Direct
2015-03-09	Restricted Stock Units	$	M	4127	Disposed		Common Stock (4127)	Direct

Footnotes

F1: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 9, 2012.

F2: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 9, 2012.

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

F4: The PUs fully vested on March 9, 2015. The number of PUs granted includes previously reported PUs 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 (the "Special Distribution").

F5: Each RSU represents a contingent right to receive one share of Common Stock.

F6: The RSUs, representing a contingent right to receive a total of 11,733 shares of Common Stock, were granted to the Reporting Person on March 9, 2012 and have vested in full in three substantially equal annual installments, the last of which was on March 9, 2015. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 in connection with the Special Distribution.