IRON MOUNTAIN INC — Director's Dealing 2016

Nov 1, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2016-10-28

Reporting Person: Sweeney Eileen (Sr.VP,and GM,Data Management)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-10-28	Common Stock, par value $.01 per share	M	2107	—	Acquired	2107	Direct
2016-10-28	Common Stock, par value $.01 per share	F	650	$33.03	Disposed	1457	Direct
2016-10-28	Common Stock, par value $.01 per share	M	5272	—	Acquired	6729	Direct
2016-10-28	Common Stock, par value $.01 per share	F	1626	$33.03	Disposed	5103	Direct
2016-10-31	Common Stock, par value $.01 per share	S	4083	$33.00	Disposed	1020	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-10-28	Restricted Stock Units	$	M	2107	Disposed		Common Stock (2107)	Direct
2016-10-28	Restricted Stock Units	$	M	5272	Disposed		Common Stock (5272)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on October 28, 2014.

F2: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of September 8, 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 6,326 shares of Common Stock, were granted to the Reporting Person on October 28, 2014 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 21,088 shares of Common Stock, were granted to the Reporting Person on October 28, 2014 and vest in four substantially equal annual installments beginning on the first anniversary of the grant date.