IRON MOUNTAIN INC — Director's Dealing 2016

Mar 16, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2016-03-15

Reporting Person: Cloutier Ernest W (EVP, Gen. Counsel, Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-03-15	Common Stock, par value $.01 per share	M	6266	—	Acquired	36457	Direct
2016-03-15	Common Stock, par value $.01 per share	F	2033	$31.35	Disposed	34424	Direct
2016-03-15	Common Stock, par value $.01 per share	M	2989	—	Acquired	37413	Direct
2016-03-15	Common Stock, par value $.01 per share	F	969	$31.35	Disposed	36444	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-03-15	Performance Units	$	M	6266	Disposed		Common Stock (6266)	Direct
2016-03-15	Restricted Stock Units	$	M	2989	Disposed		Common Stock (2989)	Direct

Footnotes

F1: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 15, 2013.

F2: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 15, 2013.

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 15, 2016. 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 8,724 shares of Common Stock, were granted to the Reporting Person on March 15, 2013 and have vested in full in three substantially equal annual installments, the last of which was on March 15, 2016. The number of RSUs granted includes previously reported RSUs allocated on November 4, 2014 in connection with the Special Distribution.