IRON MOUNTAIN INC — Director's Dealing 2019

Feb 21, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2019-02-19

Reporting Person: Brown Stuart B (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-02-19	Common Stock, par value $.01 per share	M	3240	—	Acquired	16915	Direct
2019-02-19	Common Stock, par value $.01 per share	F	952	$35.39	Disposed	15963	Direct
2019-02-19	Common Stock, par value $.01 per share	M	6744	—	Acquired	22707	Direct
2019-02-19	Common Stock, par value $.01 per share	F	1982	$35.39	Disposed	20725	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-02-19	Restricted Stock Units	$	M	3240	Disposed		Common Stock (3240.0)	Direct
2019-02-19	Performance Units	$	M	6744	Disposed		Common Stock (6744.0)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 16, 2017.

F2: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on February 18, 2016. Effective February 14, 2019, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on February 18, 2019.

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 9,729 shares of Common Stock, were granted to the Reporting Person on February 16, 2017 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

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

F6: The PUs were initially granted to the Reporting Person on February 18, 2016. Effective February 14, 2019, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on February 18, 2019.