IRON MOUNTAIN INC — Director's Dealing 2017

Feb 23, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2017-02-21

Reporting Person: MacLean Theodore (EVP & Chief Marketing Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-21	Common Stock, par value $.01 per share	M	1543	—	Acquired	8226	Direct
2017-02-21	Common Stock, par value $.01 per share	F	511	$37.71	Disposed	7715	Direct
2017-02-21	Common Stock, par value $.01 per share	M	2047	—	Acquired	9762	Direct
2017-02-21	Common Stock, par value $.01 per share	F	772	$37.71	Disposed	8990	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-21	Restricted Stock Units	$	M	1543	Disposed		Common Stock (1543)	Direct
2017-02-21	Restricted Stock Units	$	M	2047	Disposed		Common Stock (2047)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on February 19, 2015.

F2: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 18, 2016.

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 4,635 shares of Common Stock, were granted to the Reporting Person on February 19, 2015 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F5: The RSUs, representing a contingent right to receive a total of 6,149 shares of Common Stock, were granted to the Reporting Person on February 18, 2016 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.