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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-21	Common Stock, par value $.01 per share	M	1801	—	Acquired	39450	Direct
2017-02-21	Common Stock, par value $.01 per share	F	549	$37.71	Disposed	38901	Direct
2017-02-21	Common Stock, par value $.01 per share	M	2388	—	Acquired	41289	Direct
2017-02-21	Common Stock, par value $.01 per share	F	713	$37.71	Disposed	40576	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-21	Restricted Stock Units	$	M	1801	Disposed		Common Stock (1801)	Direct
2017-02-21	Restricted Stock Units	$	M	2388	Disposed		Common Stock (2388)	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 5,408 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 7,147 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.